hybridfree/eevblog-posts huggingface dataset:
Anyone know how to dump firmware from a Yinuo-Link network board? - Page 1
Forum section: electronics / general

author: thecomputerdude
author_rank: Newbie
timestamp: May 14, 2022, 02:56:05 am
content: Like the title says, I'm trying to assess a Yinuo-Link device that's been rebranded and re-flashed for any potential malicious code. Being it's pretty locked down and configured with a private SSH server I have no normal ways to access the data on it. The existing code is likely an OpenWRT/Gargoyle fork though.Observed boot time network traffic suggests connections to Chinese C&C servers for firmware updates. The only component that's reportedly capable of accessing these addresses is the Quectel cellular modem, which has been removed during testing. Does anyone with sharper eyes than I happen to see test points on this board I could hook a UART or other serial adapter to? There is nothing on the board under the foam pads besides the power pins at the phoenix connector.

author: AndyBeez
author_rank: Frequent Contributor
timestamp: May 14, 2022, 09:19:15 pm
content: The layout looks very 'box standard' for a domestic router. What is the CPU/SOC? There are no visible test points except... for the pins at JP1. This looks like a serial header.One pin will be ground, one TX and the other RX. The fourth pinmightbe the 3V3 power rail. You can try connecting your serial UART to this, respecting the 3V3 rail. You'll just have to best-guess the pinout, baud speed and bit settings. 19200-8-N-1 is always a good start.If this is a serial port, you should be able to read the OEM bootlog. Another feature of a serial connection can be, by hitting RETURN [or another other key] at power on, drops into the bootloader prompt: granting access to the environment variables. You might then spot a local host address for a TFTP server.If I am not mistaken, if the distro is OpenWRT-like, somewhere there should be a public repo (github?) with their code - either in full or as a fork of the main branch. Otherwise Yinuo-Link are taking an angle grinder to the open source license. If it's proprietory, then you are stuck. btw, some cellular modem cards have their own OS, which might be Android based. A whole new house of pain.The bootloader and firmware are likely held inside the Winbond chip (U5/6) to the left of JP1. From the lo-res image, it's a jellybean SPI type. Is it a 2/4/8/16Mb flash size?You might be able to read out U5/6 by attaching a SOIC clip directly. If not, you'll need to remove the chip, read it, and resolder it. Not so easy but this will give you all the bytes. This should include the bootloader, firmware and settings regions. Hopefully a bootlog will provide the file system mappings.You can then use Linuxstringsto hunt for anyE.T. phone homeIP addresses. You should also be able to compare the SHA256 hashes against the 'official firmware'.Try JP1 and get a bootlog.Happy angle grinding
Cisco SPA 122 glitchy firmware - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: March 26, 2022, 12:45:12 am
content: I was told to upgrade the firmware so I thought I use the latest on one.Being a bit of Cisco gear I didn't expect there to be the issues that I have experienced below.Two units, one with 1.3.5 and the other with 1.3.1 firmware worked perfectly fine work a week with no problems.Updated to 1.4.1 SR5 firmware:Noticed high CPU usage for both on the SNMP.Both disappears off the LAN, 7 and 9 hours later and become unreachable even with the power cycled.Had to preset factory reset button and set them back up.This time made a backup of the config for both.Noticed: It logs out randomly from the built in webserver and does it everytime after downloading the config and it didn't do it before the update.It happened again on both at different times dropping of the LAN.Router syslog shows traffic from the WAN port to Cisco NTP servers and dns.The syslog before they stopped doesn't seem to show any change to cause this to happen.I reset it, upload config, and it failed to upload.It's not the browser as tried three, Vivaldi (Chrome 90, Palemoon, and Internet Explorer 11)I started to suspect something is wrong.Could it be I didn't apply updates before in a sequence like with some of Netgear stuff. I checked but I don't see anything in the manual.Anyway I found the firmware and put the it back on 1.3.5 and 1.3.1 the way it was before. I was a bit worried at first whether this glitch could cause the firmware fail during upload but didn't and notice they do have backup roms.Set it back up no issue. I can download config without them logging out and upload it, it doesn't drop off.I tested it and worked my way up to 1.4.1 and 1.4.1SR1 and the problems started with 1.4.1 SR2 with it failing to upload the config and 1.4.1 (SR5) and it logs out after the config or randomly when trying to change settings.I noticed this:QuoteIt appears to me like they messed something up in SR2, possibly withdrew it and tried to fix it a couple of times seeing the same firmware version and I believe SR may mean "service release?".In the notes it was what I expect about issues like this and to check on their Cisco bug search.Access Cisco Bug Searchhttps://www.cisco.com/c/en/us/td/docs/voice_ip_comm/csbpvga/spa100-200/release/source/spa112-122-rn-1-4-1-SR5/spa112-122-rn-1-4-1-SR5.html#22097As soon as I try to make an account it goes to another sub domain and the portal is not recognizing the credentials then it redirects somewhere else with a message that the address has changed and to update the bookmark. I didn't find anything about these issues on the search engines and I can't even check on the Bug search.Maybe it's old the bug check is old or doesn't exist and not looking in the right place.Messing something up and not fixing it with the last one being the worst very disappointing coming from Cisco.So far they seem fine with 1.4.1 sr1 release and haven't dropped off yet.Does anyone use Cisco analogue phone adapters and experienced these issues before after the firmware update?
The worst Call Home Analytics offender - Page 1
Forum section: electronics / general

author: Bud
author_rank: Super Contributor
timestamp: March 03, 2022, 04:54:21 am
content: I installed the Pi-Hole DNS filter on a Paspberry Pi and it has been running for 2 days now. Can you guess who is the champion for sending my data home ?

author: alexnoot
author_rank: Contributor
timestamp: March 04, 2022, 05:23:37 pm
content: That's nothing, my Philips Hue hub is ridiculously chatty, even though I use exactly zero of the online/connected features. I hate all the telemetry we're having forced upon us, with no option of saying no.

author: Bud
author_rank: Super Contributor
timestamp: March 04, 2022, 05:26:17 pm
content: Yeah, I just would never thought Keysight would beat Google on calling home. Well done, Keysight !

author: dietert1
author_rank: Super Contributor
timestamp: March 04, 2022, 07:37:09 pm
content: It's good somebody mentions this here.We have some MS Windows based Lecroy scopes. I would never use any of them with a web connection nor in a network with other lab equipment.Also i designed our own GPIB controller 13 years ago as i didn't trust NI any longer. They used to install a large set of device drivers and services without asking. And they used to modify basic system features like network drivers. I remember difficult to fix network problems after having used a GPIB-ENET 100. Once warnings popped up about Microsoft video protocols whatever that means.Regards, Dieter

author: Bud
author_rank: Super Contributor
timestamp: March 04, 2022, 07:57:53 pm
content: I think it is the Keysight IO Libraries Suite which is sitting in the system tray. I use it for GPIB.
L2TP and IPv6 tunnel shenanigans - Page 1
Forum section: electronics / general

author: steve30
author_rank: Frequent Contributor
timestamp: January 12, 2020, 12:27:39 am
content: I've been playing with L2TP tunnels and IPv6 lately and seem to be digging myself into a deeper hole.I took out Andrews & Arnold's L2TP service to get myself a fixed IP address (and a block of IPv6 addresses), because I don't have my own internet connection - I tend to use other people's wireless networks to get internet access, with various levels of NAT and no native IPv6. Seehttps://www.aa.net.uk/broadband/l2tp-service/I have a Draytek 2926n router which I thought would work, but seems a bit peculiar. It will do the L2TP connection to Andrews & Arnold and get an IPv4 address, but it will not get an IPv6 address through DHCPv6, which it is supposed to.Alternatively, you can configure A&A to do your IPv6 as a 6in4 tunnel, which the Draytek also 'supports', but again, this doesn't work in the L2TP mode. I have a feeling that the Draytek isn't actually trying to get the IPv6 over the L2TP connection at all, and is trying to get it through the underlying WAN connection.I also have a Linksys WRT54G running Tomato. If I have this do the L2TP connection, then hook the Draytek up to it and have the Draytek do the 6in4 tunnel, it works fine.Unfortunately my Tomato router doesn't do IPv6 and I don't have anything else which does (other than the Draytek).Am I asking too much to expect IPv6 connectivity over an L2TP connection? Or is this a rather poor limitation of Draytek routers?I've attached some screenshots of the Draytek config page showing how the IPv6 tunnel works when the L2TP is done in another machine, and how it doesn't work when the Draytek itself does the L2TP.Edit: NetworkManager in Linux will do the L2TP connection, but won't get any IPv6. pfSense will also do the L2TP connection but also doesn't seem to get any IPv6.I'd appreciate any suggestions for solutions or workarounds, or suggestions for hardware that might accomplish all this in one box.Thankssteve30

author: bogga
author_rank: Newbie
timestamp: January 18, 2022, 04:30:40 pm
content: Hi,I've got the same issue with a Draytek 2860..... Did you ever come to a resolution?

author: steve30
author_rank: Frequent Contributor
timestamp: January 18, 2022, 07:42:36 pm
content: Unfortunately not. I just don't think the Draytek supports getting IPv6 connectivity over the L2TP interface.I replaced it with a Mikrotik router which does just fine though. I have the wireless interface set as the 'WAN' port, so it can get its NAT'd internet access wirelessly, then there's an L2TP connection running over that, and then the IPv6 comes over the L2TP. It took a bit of faffing to get it set up as there are a lot of manual controls in Mikrotik RouterOS, and its not always obvious what they do or how they work to someone who is not that knowledgeable in networking. But I got it going in the end.
Proxy FTTP - Page 1
Forum section: electronics / general

author: PerranOak
author_rank: Frequent Contributor
timestamp: November 03, 2020, 04:54:54 pm
content: I just got FTTP.All my machines connected OK except the old laptop running Win8.1Pro.It looks like it connects to the router (wifi) but has no Internet.The troubleshooter says that it can't automatically find the proxy settings and/or that it can't find the default gateway.Any help/pointers gratefully received.Cheers.

author: andy3055
author_rank: Super Contributor
timestamp: November 03, 2020, 05:19:11 pm
content: I am sure you have checked the usual stuff but have you by any chance assigned a static GW/IP on this laptop at some point? Make them all automatic and see if that helps.

author: PerranOak
author_rank: Frequent Contributor
timestamp: November 04, 2020, 09:38:10 am
content: Cheers. How do I do that?I did setup the connection manually - could that be the problem?

author: andy3055
author_rank: Super Contributor
timestamp: November 04, 2020, 04:01:25 pm
content: I do not use Win 8 versions. But just Google and you should be able to find the steps to follow. It should not be very different from other versions of Windows.

author: PerranOak
author_rank: Frequent Contributor
timestamp: November 08, 2020, 06:01:04 pm
content: Okay. I have tried every single thing that Google could provide: I’ve installed and uninstalled everything, run loads of scripts, checked all the settings are automatic, you name it!The laptop is connected to the Wi-Fi router as I can see it on other devices. However, it still will not connect to the Internet giving that proxy error.Any further advice would be most welcome, thank you.

author: andy3055
author_rank: Super Contributor
timestamp: November 08, 2020, 11:11:11 pm
content: Well, As far as I can tell, there are multiple things that can screw up the network parameters/settings.I found this from Microsoft:https://answers.microsoft.com/en-us/windows/forum/windows8_1-networking/windows-81-proxy-settings-keeps-resetting/3e41dded-6ed3-4883-a7f4-8af538a45d34It may work for you.

author: PerranOak
author_rank: Frequent Contributor
timestamp: November 10, 2020, 08:48:53 am
content: Nothing worked then I remembered that I had an old wifi dongle so I installed that and I’m back online!Thank you very much for sticking with me - I gave up in the end!

author: andy3055
author_rank: Super Contributor
timestamp: November 10, 2020, 10:51:14 pm
content: Whatever that takes to get it going...

author: PerranOak
author_rank: Frequent Contributor
timestamp: February 22, 2022, 02:13:44 pm
content: No, I gave up and used an old wifi dongle. Now, I've bought a new laptop! I'm gonna make that old laptop a Linux machine.Thanks for the interest.
RUSSIA gov will attempt blocking TOR .. (one more again..) - Page 1
Forum section: electronics / general

author: PKTKS
author_rank: Super Contributor
timestamp: December 09, 2021, 02:53:23 pm
content: and yet again one more attempt to block TOR onions..It looks like unless some govs can spy and censor trafficeveryone is a terrorist and criminal...https://www.reuters.com/technology/russia-ratchets-up-internet-crackdown-with-block-privacy-service-tor-2021-12-08/https://www.euronews.com/2021/12/08/tor-network-russia-blocks-access-to-popular-anonymous-online-serviceWondering how much that will costand what they will really have..with dozens and dozens of bridges and onions...Paul
InterPlanetary File System (IPFS, IPNS, DNSLink) - Page 1
Forum section: electronics / general

author: RoGeorge
author_rank: Super Contributor
timestamp: July 08, 2021, 11:02:42 am
content: I've found today about a file system based on hashing the content of the files. My understanding is IPFS is a combination between a torrent protocol and a block chain, and it's distributed, meaning there's no need of central servers for it to work. Also has some local data cache at the user's side, so it balances the traffic between users.With IPFS one can share files online, the content is guaranteed against tampering, and the files can be reached by others with an internet browser, just like a webpage:https://ipfs.io/#howThere's a 2 minutes YouTube video about how the data travels:Quick explanation of dnslink in IPFS.What I don't know is about the DNSLink and "TXT records". I do not have a registered domain in DNS, and never maintain my own domain, so I'm not very sure what/where are those DNSLink TXT records.https://docs.ipfs.io/concepts/dnslink/My setup is like this:- my ISP provider includes for free some sort of Dynamic DNS, meaning I can set from their webpage a single word, let's say "rogeorge", and that will become visible athttps://rogeorge.go.roOther paying ISP users can pick their own subdomain names, and it will become, let's sayhttps://other_subdomain.go.ro- the go.ro is maintained by the ISP, and I can not change anything (thinking TXT records).- it is my job to setup at home a server (did that once and got a working SMF forum visible from the Internet)Q1. Where/what are those TXT records I need to add in order to make my IPFS files reachable from the Internet, but reachable by their human readable names (not by hash)?https://docs.ipfs.io/concepts/dnslink/Q2. Will/can DNSLink work with my free Dynamic DNS subdomain, or do I need a proper (and payed) DNS name?

author: cdev
author_rank: Super Contributor
timestamp: October 15, 2021, 10:54:47 pm
content: This is very interesting to me - the Internet in modern Romania's evolution. I went through the early days of the Internet here..The"political layer"of the new networking model is increasingly important and seems to me quite interesting.

author: ve7xen
author_rank: Super Contributor
timestamp: October 15, 2021, 11:22:33 pm
content: Any domain the client can resolve should work. It could be one owned by you, or a shared one at a DNS service provider, or even a local-only server just on your LAN. I expect if the ecosystem around this technology grows, this will become a service that is provided seamlessly to the user specifically for this purpose (a la something like DropBox).If you wanted to play around a bit you could set up an account at afraid.org or similar and create the necessary TXT records on someone else's (donated) domain manually. Or you could delegate a subdomain to your own self-hosted DNS server (assuming your ISP allows this), or one running on a 'free' cloud instance (e.g. Oracle Cloud free tier), and manage the records yourself.
RTL8192DU any information wanted. - Page 1
Forum section: electronics / general

author: Vaklin
author_rank: Newbie
timestamp: September 23, 2021, 07:25:03 pm
content: Hi!This is my first topic here. The RTL8192DU is used in a WiFi board in the CGO3 and CGO3+ cameras from Yuneec. Instead of the 5 GHz networking, this IC acts as a processor too. Looks it is reprogrammable in some way because the camera firmware can be updated via SD card. The final destination is to use this board as a USB host for UVC (to attach a USB camera).Any information will be welcome. Communication with personal messages is OK too. Probably I'll create a topic about reversing the CGO3's, where we can discuss all aspects of this but not right now.Regards!
CVE-2021-20090 Arcadyan - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: August 09, 2021, 06:48:27 pm
content: If you have an Arcadyan based router you should check for a firmware update. Be aware that several telco branded routers are actually Arcadyan devices. Since a few days someone tries to incorporate unpatched routers into their DDoS botnet.More info:-https://therecord.media/routers-and-modems-running-arcadyan-firmware-are-under-attack/-https://www.tenable.com/security/research/tra-2021-13-https://kb.cert.org/vuls/id/914124
MeiG SRM815 5G module Documentation wanted - Page 1
Forum section: electronics / general

author: fipse
author_rank: Newbie
timestamp: September 07, 2021, 04:06:27 pm
content: Hi all,I'm looking for documentation, drivers, etc. for the MeiG SRM815 5G module. The contact on the manufacturers website is not working and there is no download link.Can someone please provide me with this things if possible?Thanks,fipse
your Bluetooth is broken: BRAKTOOTH - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: September 02, 2021, 04:42:47 pm
content: BRAKTOOTH: Causing Havoc on Bluetooth Link Manager -https://asset-group.github.io/disclosures/braktooth/Sadly, many affected devices won't get any patch.
CVE-2021-28372 Kalay P2P SDK (ThroughTek) - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: August 18, 2021, 11:16:41 am
content: Another critical bug in an SDK used by many IP cameras, baby phones and other IoT devices:https://www.fireeye.com/blog/threat-research/2021/08/mandiant-discloses-critical-vulnerability-affecting-iot-devices.html
Reflected Amplification with TCP (= XXL DDoS) - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: August 18, 2021, 09:26:02 am
content: Fresh from USENIX: "Weaponizing Middleboxes for TCP Reflected Amplification"Paper:https://www.usenix.org/system/files/sec21fall-bock.pdfOverview:https://therecord.media/firewalls-and-middleboxes-can-be-weaponized-for-gigantic-ddos-attacks/Some vendors took a shortcut for performance reasons and created XXL DDoS devices.
Security issues Realtek RTL8xxx SoCs - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: August 17, 2021, 01:40:08 pm
content: Several security issues in SDK for RTL8xxx: CVE-2021-35392, CVE-2021-35393, CVE-2021-35394 and CVE-2021-35395. 65+ vendors affected (WiFi routers, WiFi repeaters, IP cameras and IoT).Details:https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain/Update:One IoT botnet is already looking for victims:https://therecord.media/hundreds-of-thousands-of-realtek-based-devices-under-attack-from-iot-botnet/
connecting a ps3 games console to my pc - Page 1
Forum section: electronics / general

author: m3vuv
author_rank: Super Contributor
timestamp: August 03, 2021, 01:15:49 am
content: Hi all,i am trying to connect my ps3 to my pc via an ethernet cable strait into my pc ethernet port,the console settings are as followsip 1.1.1.2 mac id 1D:0D:2E:88:F2subnet mask 255.255.255.0default router 1.0.0.0pri dns 208.67.220.220sec dns 1.1.1.1mtu autoproxy do not useuse pnp enablewhen doing a test it says :an error occoured during comunication with the server this is a dns error 80710102any idea how to fix this,i am using win 7 sp2 and filezilla portable,cheers in advance. also attached a screen shot of my pc setup.

author: Rick Law
author_rank: Super Contributor
timestamp: August 03, 2021, 07:18:03 pm
content: Since I have not work with PS3, this is a shot in the dark based on what you described -- until some one comes with a better suggestion, this could get you going.What you didn't say is:(1) Are you using across-overcable?(2) What about yourPC's IP setting?If your PS3-PC connection works via a hub/switch, then what you are missing is a cross-over cable.Details:(1)When you connect device_A to device_B (and both are without auto up-link) without cross over, you are connecting talk to talk and listen to listen, so your two devices can't talk to each other. A cross-over cable connects talk to listen and listen to talk at one end of the cable. So when device_A talks, it talks to device_B's listen, and when device_B talks, it talks to device_A's listen. Now they can communicate.These days, auto up-link ports are expected for most switch or hub, so up-link is kind of a forgotten thing - in the old days, there used to be an up-link button for one port to enable a cross-over, or one uses a cross-over cable.You could use a switch/hub to sit in-between your PC and the PS3.(2)Both device needs an IP, who is giving it out?You said "the console settings are as follows... ip 1.1.1.2/255.255.255.0" which leads me to think that is your PS3-console. Who is doing the IP setting in your PC? Is the PS3 capable and set to do DHCP serving?If you don't know or not sure, you should manually set the IP of your PC to the same subnet as well. Try 1.1.1.3/255.255.255.0. Typically, gateway and DNS is not necessary if you are just connecting two devices to each other.You really should use "192.168.x.x". The 192.168.x.x is designed for private use and would run into less potential issues. Try "192.168.2.2" for the PS3, and "192.168.2.3" for your PC. Typically, "192.168.0.x" and "192.168.1.x" are used as the defaults for auto-setup networks. "192.168.2.2 and .3" would be unlikely to clash and can even used on a shared switch that may be using 192.168.1.x or 192.168.0.x.Edit: made it easier to read. First draft got too much extra info causing confusion.

author: m3vuv
author_rank: Super Contributor
timestamp: August 04, 2021, 05:51:20 am
content: got it sorted,found this guidehttps://www.se7ensins.com/forums/threads/tutorial-how-to-ftp-games-to-from-ps3-with-ethernet-cable-800mb-minute.1196224/
KSZ8081 PHY center tap and magnetics - Page 1
Forum section: electronics / general

author: radar_macgyver
author_rank: Frequent Contributor
timestamp: July 01, 2021, 05:14:49 pm
content: I'm using an off the shelf SOM with a KSZ8081 Ethernet PHY on it. The PHY datasheet mentions that the center taps on the TX/RX magnetics must be separately AC grounded with a 0.1uF capacitor. Yet, on the SOM's eval board, they short together the center taps and then AC ground them. I have had some occasional issues with the Ethernet connection on the SOM eval board (will establish a link if the cable is plugged in prior to powering up, but sometimes won't establish a link if plugged in after powering up).Could anyone with some experience with this or related PHYs let me know which way is correct? I'm designing my own base board for the SOM.Another question: There seem to be several different configurations of magnetics. Some have the common mode chokes on the cable side of the isolation transformer, and this is what's shown in the KSZ8081 data sheet. Others, like the Molex 480250002 show the CMC on the RX pair on the PHY side. Why the difference? The documentation I could find online mostly talks about differences between magnetics that do and don't include the CMC.
Experience with LoRaWAN confirmed packets? (I'm having issues w/ EU868) - Page 1
Forum section: electronics / general

author: globoy
author_rank: Frequent Contributor
timestamp: May 13, 2021, 04:49:07 pm
content: I am developing a LoRaWAN product and using the Laird RM1xx module (Nordic nRF51822 + Semtech Sx1272). I do local testing with a RAK Wireless 2243 module but don't have a lot of LoRaWAN test gear (any...). I have seen an issue I can't explain when using confirmed packets with the RM186 (EU868) module. Despite the device and gateway's close proximity I do not see a great number of confirmations so my packets are repeatedly resent. A confirmation eventually is received. I do not see this behavior at all with the RM191 (US915). The confirmation packets are received every time. Laird does have different firmware for each device but the API is the same.Ultimately my EU868 devices will be on a network with Kirlink iStation gateways.I have a couple of questions for people who ave more experience.Has anyone else seen issues like this?How often do devices use confirmed packets? I would like to use them because I am occasionally sending state transition information that I don't want lost.Thanks.

author: Araho
author_rank: Regular Contributor
timestamp: June 08, 2021, 12:55:49 pm
content: All LoRaWAN documentation I have seen says that you should never design a system that requires ACKs / Confirmations. A gateway is limited to the same 1% airtime as a device, so if 100 devices are connecting through that gateway, the downlink window is spread across all of them. If each device requires ACKs, that'll quickly fill up the allowed transmission time.

author: globoy
author_rank: Frequent Contributor
timestamp: June 22, 2021, 04:37:30 pm
content: Ah, interesting. Thank you.

author: thirteeneast
author_rank: Newbie
timestamp: July 01, 2021, 11:16:20 am
content: Sounds like fair use policy or a useless TTN (there areba few about)I've sent packets miles using LoRaWAN, I have projects that have been running a few years now, not really had any issues apart from a few poorly manufactured sensors that I now steer clear of. (French)I generally find the RAK to be good and certainly some of the most innovate in the market.Im also unsure how your TTN would handle using the wrong frequency for your country for all the back office etcRegards.
heads up: three-digit web browser version - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: December 25, 2021, 04:28:23 pm
content: Soon we'll have web browsers with three-digit versions, e.g. Chrome and Firefox. Some CMS developers missed the big Y2k fun (maybe too young?) and repeated the same mistake. Their CMS works only with one or two-digit browser versions in the User Agent string. Yay!- Chrome 100 could break some websites next year, but Google is working on solutions (https://9to5google.com/2021/12/22/google-chrome-100-break-websites-solutions/)- Force Chrome major version to 100 in the User-Agent string (https://developer.chrome.com/blog/force-major-version-to-100/)- Mozilla tests if 'Firefox/100.0' user agent breaks websites (https://www.bleepingcomputer.com/news/software/mozilla-tests-if-firefox-1000-user-agent-breaks-websites/)- Firefox 100 User-Agent Experiment (https://discourse.mozilla.org/t/firefox-100-user-agent-experiment/85332)

author: SiliconWizard
author_rank: Super Contributor
timestamp: December 26, 2021, 06:35:56 pm
content: Much fun!Sure imposing abritrary limits to numbers is rarely a good idea for long-term stuff.But here, this completely idiotic versioning scheme backfires, and I find that hilarious.
Are there any proper WLAN amplifier available for individuals? - Page 1
Forum section: electronics / general

author: Logan
author_rank: Frequent Contributor
timestamp: April 22, 2021, 12:25:42 pm
content: Hi guys.I want to find a WLAN amplifier that connects between the wireless card and the antennas.But after lots of search, I still cannot find anything other than those unbranded craps.I want one that is not unnecessarily big, but from a good brand, and can connect to a consumer WLAN card, which should support at least g/n/ac protocols, and TX output at least 27dbm(500mW). It would be great if RX sensitivity can also be enhanced.Any recommendations for that?Thanks!

author: ejeffrey
author_rank: Super Contributor
timestamp: April 25, 2021, 10:27:37 pm
content: In the us and most of the world there is no legal way for most people to use an amplifier thus you will not find any "proper" devices from recognizable manufacturers.

author: geggi1
author_rank: Frequent Contributor
timestamp: April 25, 2021, 10:48:23 pm
content: If you are going to use this as an link you shuld put most of your gain in the antenna. You can get a grid antenna with 30dB gain at each end and still have the same link budget.

author: NiHaoMike
author_rank: Super Contributor
timestamp: April 29, 2021, 01:59:24 pm
content: Just use a high power card.

author: M0HZH
author_rank: Regular Contributor
timestamp: April 29, 2021, 02:19:18 pm
content: After a certain point antenna gain gets considerably more expensive than transmit power gain.The "4W" 2.4GHz no-name amplifiers are decent 1.5W amplifiers, the amateur radio community experimented with them for satellite uplink and they're well documented. Depending on where you are, they're probably not legal to use on WiFi.

author: IanB
author_rank: Super Contributor
timestamp: April 29, 2021, 02:28:49 pm
content: Quote from: Logan on April 22, 2021, 12:25:42 pmThere are two approaches. You can use repeater stations to get coverage to different rooms that may not have a good direct signal.A second approach is to make the antenna more directional. This is especially useful if you want to make point to point connections, for example to an outbuilding. There are various instructions available for home build solutions.

author: Halcyon
author_rank: Unknown
timestamp: May 01, 2021, 10:00:11 pm
content: What exactly are you trying to achieve Logan?
AMNESIA:33 - TCP/IP stacks uIP, FNET, picoTCP and Nut/Net - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: December 08, 2020, 01:17:09 pm
content: Critical vulnerabilities in TCP/IP stacks uIP, FNET, picoTCP and Nut/Net:https://www.forescout.com/company/blog/amnesia33-forescout-research-labs-finds-33-new-vulnerabilities-in-open-source-tcp-ip-stacks/(beware of the marketing)

author: EasyGoing1
author_rank: Regular Contributor
timestamp: February 25, 2021, 01:49:35 pm
content: These days, Im skeptical of statements like thisGenerally, these vulnerabilities can be exploited to take full control of a target device (RCE)Who's still out there making operating systems where the network layer processes are given root-level access? WHO? Cause they should be shot whoever they are.

author: andersm
author_rank: Super Contributor
timestamp: February 25, 2021, 09:43:28 pm
content: Quote from: EasyGoing1 on February 25, 2021, 01:49:35 pmThe listed stacks are pretty much all aimed at microcontrollers.

author: madires
author_rank: Super Contributor
timestamp: April 13, 2021, 07:20:37 pm
content: Next one: NAME:WRECKhttps://therecord.media/namewreck-vulnerabilities-impact-millions-of-smart-and-industrial-devices/

author: ejeffrey
author_rank: Super Contributor
timestamp: April 14, 2021, 01:10:21 am
content: Quote from: EasyGoing1 on February 25, 2021, 01:49:35 pmThere are no operating systems of any commercial or practical use where remote code execution in the network stack is not the highest level of security vulnerability. Even if you have process isolation from the network code it has sufficiently privileged to be game over from a security standpoint.
SIM7600EI-H Network connecting issue, Please Help - Page 1
Forum section: electronics / general

author: Bhargav_1990
author_rank: Newbie
timestamp: November 18, 2022, 07:44:00 pm
content: Hii alli am using SIM7600EI-H 4G cellular Module in one project. which is from SIMCOM.firmware version we find by AT+CGMR is : LE20B04SIM7600M21-AProblem we are facing is that the modem is not connecting to any network on startup. Both STATUS and NETLIGHT leds are glowing continuously.on the serial monitor we are receiving on startup below the string.RDY+CPIN: READYPB DONEwhen i try to see status of connection by using AT+CREG command i am getting following response:+CREG: 0,6value 6 is what, it is not even mentioned in the command datasheet of simcom. (attached snapshot)i have provided 4V to module via buck converter LM2576-ADJ and my power adaptor rating is 12v and 2amp.Please Help me what the issue is and how i can solve this issue.Thanks.

author: Nominal Animal
author_rank: Super Contributor
timestamp: November 19, 2022, 09:10:11 am
content: Better ask SimCom, by sending email to support at simcom dot com, with subject say "Why SIM7600EI-H returns +CREG:0,6 when sending AT+CREG?"TheirQuestions Related to Networkpage already explains the same for "+CREG:0,3", you see. The aforementioned email subject is likely to get routed correctly, so hopefully you'll get an answer.I personally currently use a similar modem, Huawei ME909s-120, on both a Mikrotik RBM33G, as well as using a simple USB WWAN adapter I call my FrankenModem. (Took a few iterations to find one whose regulator/switcher does not get too hot off eBay.) Works fine in OpenWRT and Linux. The SIM7600 series support is inModemManager(GitHub tree for SimTech MM plugins), but the code relies heavily onglibabstractions (providing object and introspection support, making bindings to other languages easy viagiror gobject introspection) so you might have to familiarize yourself with that before delving into ModemManager. When dealing with 3G/4G/LTE modems, ModemManager currently does support the widest variety of devices (and is used in Linux and OpenWRT), so it is an useful resource to investigate how to support such modems in general in ones own devices. Because I use the modem via ModemManager myself, I have not, and I do not need to, delve into the exact details; ModemManager does all the low-level work for me.
NAT Slipstreaming v2.0 - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: March 11, 2021, 03:45:59 pm
content: If you run a firewall with NAT ALGs you might want to look into following attack method:-https://samy.pl/slipstream/-https://github.com/samyk/slipstream

author: PKTKS
author_rank: Super Contributor
timestamp: March 13, 2021, 12:26:11 pm
content: Curious... not surprised being mostly MS under stuff..But it took me about 1 minute to craft a behavioral rule setto include these ports and typical traffic...Paul

author: nuclearcat
author_rank: Unknown
timestamp: March 29, 2021, 10:25:39 am
content: Quote from: PKTKS on March 13, 2021, 12:26:11 pmJust disable ALG.Most of also crippled anyway, for example recent SIP servers keep NAT in mind, and if ALG enabled - it often break things, not fix.
Magnetic Ethernet patch cord? - Page 1
Forum section: electronics / general

author: AlbertL
author_rank: Regular Contributor
timestamp: March 12, 2021, 02:07:53 pm
content: Had a little surprise yesterday. On my bench, an Ethernet patch cord brushed across a magnet - and it stuck! I found several more of the same brand ("eje"), and they are all magnetic. I don't remember if I bought the cords separately or if they came packaged with a device. The cords are Cat5, 4-pair, UTP. They appear to be well-made and have the proper markings.

author: amyk
author_rank: Super Contributor
timestamp: March 12, 2021, 02:39:35 pm
content: Not magnetic, just ferromagnetic... Copper-coated steel conductors?

author: AlbertL
author_rank: Regular Contributor
timestamp: March 12, 2021, 03:15:52 pm
content: Yes, steel wire is the only explanation I can think of. The cable is marked UTP (Unshielded Twisted Pair) and the attraction extends even to the clear plastic head, so it's not the shield. Looking at the connector, the exposed ends of the wires definitely don't look like copper.I know there's some aluminum Ethernet cable being sold, but steel? Wow!

author: nctnico
author_rank: Super Contributor
timestamp: March 12, 2021, 07:31:35 pm
content: Steel cables aren't that uncommon. Steel is often used for heavy duty wires which are subjected to lots of twisting & bending. Copper is way too prone to breaking for such applications. Professional headphones often have steel wires.
Intel 9260 wifi / BT M2 adapter - slooooow speeds - Page 1
Forum section: electronics / general

author: DW1961
author_rank: Frequent Contributor
timestamp: November 04, 2020, 09:22:06 pm
content: I've having a real problem here with my installed Intel 9260 wifi M2 adapter.My download plan in 100Mbps.Modem/Router: Motorola 7315Motherboard: Gigabyte Aorus Pro wifi ITX with the B450 chipsetUsing a TP Link USB 3 wifi dongle I can get over 100Mbps download.Using the M2 internal Intel 9260, I'm getting around 30-45Mbps. Many times it's down in the teens and single digits.Anyone have any idea what going on?
Dissapearing packets over certain 4G networks - Page 1
Forum section: electronics / general

author: deadly_penguin
author_rank: Contributor
timestamp: October 16, 2020, 09:27:20 am
content: Hi,I have two embedded devices trying to talk over a 4G gateway. One can successfully open a connection to the server, the other (using an old Microchip tcp/ip stack) can send a SYN, get a response, ACK it and send the HTTP request, but the HTTP request won't reach the server. Apart from window size and scaling (the one that won't work has a much smaller window size and no scaling), and a few options, the packets are almost identical.It's also network dependant - everything is fine on EE, but breaks on O2.Anyone have any suggestions?

author: Halcyon
author_rank: Unknown
timestamp: October 26, 2020, 03:53:27 am
content: Without knowing exactly what the set up, is it possible that carrier grade NAT is breaking things? It's common on cellular networks (and even many fixed wire networks) not to have a public IPv4 address.

author: deadly_penguin
author_rank: Contributor
timestamp: October 27, 2020, 01:38:15 pm
content: Thanks,We fixed it eventually. It turned out that on certain carriers that use a transparent proxy, the proxy was getting upset by the Window Size that the Microchip stack was setting and just black-holing the packets.
Anyone have experiance with a RN4870 talking transpaent UART to linux? - Page 1
Forum section: electronics / general

author: siliconwasteland
author_rank: Newbie
timestamp: September 16, 2020, 01:27:18 am
content: Hi,I'm trying to get a raspberryPi to talk over bluetooth to a Microchip RN4870.From the Pi I can get connected to the RN4870:%CONNECT,0,B827EBXXXXXX%%SECURED%%BONDED%%STREAM_OPEN%%CONN_PARAM,0018,0000,0200%But unable to pass data using minicom.Any pointers would be really appreciated!len
Bluez Bluetooth over LAN - Page 1
Forum section: electronics / general

author: NiHaoMike
author_rank: Super Contributor
timestamp: September 12, 2020, 01:56:07 pm
content: Is there a way to have Bluez use a Bluetooth adapter on a remote machine connected over a network? That is, have machine A use a Bluetooth adapter on machine B to connect to Bluetooth devices within range of B but not A?

author: madires
author_rank: Super Contributor
timestamp: September 12, 2020, 02:59:55 pm
content: usbip
Local server expose to the internet. - Page 1
Forum section: electronics / general

author: rckanta
author_rank: Contributor
timestamp: July 02, 2020, 06:10:17 pm
content: I have around 100 PC, I want to expose to the internet.I use DDNS but it is not working 100%. Most of time host is not reachable.I don't want to use port forwarding.What is the best way to do it?

author: Monkeh
author_rank: Super Contributor
timestamp: July 02, 2020, 06:18:06 pm
content: You fork out for 100 routable IPs like everyone else who wants to do something silly like that.

author: grumpydoc
author_rank: Super Contributor
timestamp: July 02, 2020, 09:39:59 pm
content: Quote from: Monkeh on July 02, 2020, 06:18:06 pmWell,somestatic/routable IP's at any rate, and a proper DNS service, not a DDNS. Depends what rckanta means by "expose"Multiple web servers can sit behind a single IP address which could then fan out to the actual servers, it can even be done for https by using Server Name Indication (or some tinkering with certificates).

author: Mr Evil
author_rank: Regular Contributor
timestamp: July 04, 2020, 12:03:05 pm
content: Quote from: grumpydoc on July 02, 2020, 09:39:59 pmJust to expand on how to go about that, assuming rckanta wants the servers to be accessible over HTTP:Set up a domain name for each server (you can use a wildcard DNS entry so you don't have to set up 100 of them).Set up a single web server, which will need ports 80 and/or 443 forwarded to it.Configure the web server as areverse proxy, so it will forward requests for each domain to the correct server.Marvel at how easy it actually was!

author: RenThraysk
author_rank: Regular Contributor
timestamp: July 04, 2020, 01:29:31 pm
content: What are you trying to achieve?Do you want to connect the PCs in a private network via the internet?

author: Halcyon
author_rank: Unknown
timestamp: August 24, 2020, 03:25:29 am
content: Use a block of IPv6 addresses. Many ISPs hand them out like candy.
Phantom network device - Page 1
Forum section: electronics / general

author: Raj
author_rank: Frequent Contributor
timestamp: June 30, 2020, 06:01:07 pm
content: So I have almost 20m long Ethernet cable, that when I connect to the router, with the other end connected to nothing, makes the router's port connected light, light up...How screwed am I?Do i need to pull that wire off of my wall and replace it?I think it's either caused by stray capacitance buildup in the wire or because I accidentally landed a hammer blow onto it while tacking it onto the wall...but the internals looked fine when I stripped that section of wire to inspect it, But let's not jump to conclusions.when it is connected, my router log randomly reports "LAN4 link up 100 mbps" and "LAN4 link down" in a random interval of 2-3 minutes

author: fordem
author_rank: Regular Contributor
timestamp: July 02, 2020, 12:42:44 am
content: My suspicion would be that there is an intermittent short somewhere in that cable - the router is seeing a link pulse when it shouldn't - and yes, you'll need to replace it, just opening up the cable (as you did to inspect) will cause issues with cross talk.I've done quite a few cabling jobs where cables are connected to the various switches, etc., with nothing at the other end except an empty wall jack and I've never had the port lights come on, I've also seen situations where with a defective cable, you get a link light at one end, but not the other, and that has been because one end is receiving a link pulse from the other side, but the other end is getting the one sent.If you have access to a cable certifier you can check it, generally speaking - I don't think check for capacitance, they do check for continuity, correct wiremap, length, attenuation and cross talk in a couple of different places.

author: Raj
author_rank: Frequent Contributor
timestamp: July 02, 2020, 04:14:04 am
content: Thanks...replacing it rightaway
[Dude] Starting application using z-wave comunication - Page 1
Forum section: electronics / general

author: grafi
author_rank: Contributor
timestamp: June 26, 2020, 07:28:08 am
content: Hi guys,Recently i am looking information about Z-Wave protocol and how can i integrate in my own project.I want use z-wave comunication and send some data from end-devices to a gateway device. Data could be a packets of 256 bytes or more (maybe could be sent it in diferent packages). I dont want develop an aplication that only send or recive values.So, i am trying to find an IC and API or AT commands communication to Z-Wave IC (i know that only is sold by Silicon Labs), but i dont find anything of this and the option is buy the development kit license (over 3000$). Is it right? Could i found any option similar to an Xbee module or any other module?Other question, how dificult is start to develop my first application using z-wave?Thanks guys,Regards,

author: grafi
author_rank: Contributor
timestamp: July 09, 2020, 06:07:42 am
content: Anybody could help me? Almost if z-wave can send 256 bytes packages or z-wave can not do this.Thanks,Regards,

author: 2N3055
author_rank: Super Contributor
timestamp: July 09, 2020, 06:23:09 am
content: https://www.silabs.com/development-tools/wireless/z-wave/z-wave-700-starter-kit

author: grafi
author_rank: Contributor
timestamp: July 09, 2020, 06:25:42 am
content: With this starter kit, is it not neccessary buy the SDK?

author: 2N3055
author_rank: Super Contributor
timestamp: July 09, 2020, 07:16:17 am
content: I have no idea, Z-Wave is highly proprietary, not open, and I have no intention to even touch that crap. And if you don't really have too, you shouldn't either...Unless someone comes with a project that mandates it and pays for all cost....

author: MarkMLl
author_rank: Frequent Contributor
timestamp: July 09, 2020, 09:24:47 am
content: All of these things are a pain in the arse for a beginner. I suggest that OP needs to decide whether he wants simple point-to-point or some sort of "Internet of Things" support, if he decides he wants IoT should very carefully ask himself "why", should review Github etc. to see what other people are doing and then choose appropriate hardware.MarkMLl
Ripple20 - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: June 16, 2020, 08:59:37 pm
content: Some security researchers have found multiple vulnerabilities in on old TCP/IP library which is widely used. The estimated impact is huge, printservers, UPSs, IoT and so on. The researchers published their findings athttps://www.jsof-tech.com/ripple20/.

author: madires
author_rank: Super Contributor
timestamp: June 17, 2020, 01:24:55 pm
content: HP/Samsung printers:https://support.hp.com/ee-en/document/c06640149Intel CSME, SPS, TXE, AMT, ISM and DAL:https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00295.html
Finding a Broadcom Distributor in Australia - Page 1
Forum section: electronics / general

author: ziggyfish
author_rank: Regular Contributor
timestamp: September 29, 2020, 02:35:57 am
content: Hi,I have designed network switch based on the BCM56070 chip. I have designed the schematic and PCB layout, and I am ready to build it up.Looking on their website, they say Digi key and Element14 are distributors. However I can't seem to find this part on their website.Does anyone know where I can get this chip?ThanksBrendan

author: DolphLundgren
author_rank: Newbie
timestamp: October 19, 2020, 03:20:40 am
content: I found 2 versions of the BCM56070 onMouserand when I switched to Australia they still showed up.So I think you should be able to get one from them but I don't know which specific version of the chip you are looking for and I didn't find a document on Broadcom's site that showed the difference between these.How difficult was the switch to design?I'd like to do the same thing with the BCM5315 series chips but I'm new to electronic design.