[Acer Iconia A500] gubon13@yahoo.com:
Same boat

I'm experiencing the exact same situation where I can connect but get no traffic moving. Also, I cannot get settings, etc. to stick on shutdown/reboot. I'm going to put down exactly how I got here in the hopes that it helps someone else to figure this out...

1. Rooted stock Acer Iconia (A500) tablet

2. Installed tun.ko

Copied tun.ko to /system/lib/modules

chmod 644 /system/lib/modules/tun.ko

insmod /system/lib/modules/tun.ko

3. Installed BusyBox (from Market) 1.18.4 to /system/xbin

4. Installed VPNC Widget (from Market) and set information:

IPSecGateway - Public VPN host

IPSecId - VPN group name

IPSec Group Password - VPN group password

XAuthUsername - User ID

XauthPassword - User password

other Vpnc Options - *blank*

5. From VPNC Widget settings, selected "Check Prerequisites".

Running tests...

Error: root access missing!

Error: no access to TUN device!

Warning: 'Advanced Routing' feature missing - VPN connectivity might be lost after a while

Sorry, the VPNC Widget will not work on this phone.​

Not sure why it's saying root access missing, but it is saying no access to TUN device. It's not saying that TUN device is missing, so I know the insmod worked.

6. Started VPNC Widget - immediately errored out. Checked last vpn session log:

Enter IPSec secret for GROUPNAME@vpn.vpnhost.com

Enter password for USERID@vpn.vpnhost.com

pre-Init phase...

reloc_library[1315]: 1069 cannot locate '__set_sycal_errno'...

CANNOT LINK EXECUTABLE

reloc_library[1315]: 1070 cannot locat '__set_syscall_errno'...

CANNOT LINK EXECUTABLE

Error: no access to TUN device!

can't open /dev/net/tun, check that it is either device char 10 200 or (with DevFS) a symlink to ../misc/net/tun (not mist/net/tun): No such file or directory

can't initialise tunnel interface: No such file or directory

vpnc version 0.5.3-mjm1-140M​

7. Manually created tunnel device

mkdir /dev/net

mknod /dev/net/tun c 10 200

8. From VPNC Widget settings, selected "Check Prerequisites".

Running tests...

Error: root access missing!

Warning: 'Advanced Routing' feature missing - VPN connectivity might be lost after a while

Sorry, the VPNC Widget will not work on this phone.​

TUN access is working, but still says no root access...

9. Started VPNC Widget. Connected immediately, but VPN traffic would not flow. External web traffic still worked. Cisco ASA shows successful login.

10. Disconnected from VPN Widget. Checked last vpn session log:

Enter IPSec secret for GROUPNAME@vpn.vpnhost.com

Enter password for USERID@vpn.vpnhost.com

pre-Init phase...

Error binding to source port. Try '--local-port 0'

Failed to bind to 0.0.0.0:4500: Address already in use

vpnc version 0.5.3-mjm1-140M

IKE SA selected psk+auth-3des-md5

NAT status: this end behind NAT? YES -- remote end behind NAT? YES​

11. Changed VPNC Widget configuration:

Added '--local-port 0' to other Vpnc Options

12. Start VPNC Widget. Either it connects and immediately reports password error (Cisco ASA shows unsuccessful login - bad password, I think) or it connects but no traffic passes, VPN or web (Cisco ASA show successful login).

13. Check last vpn session log for bad password event:

Enter IPSec secret for GROUPNAME@vpn.vpnhost.com

Enter password for USERID@vpn.vpnhost.com

pre-Init phase...

Password for VPN USERID@vpn.host.ip.address:

Password for VPN USERID@vpn.host.ip.address:

authentication unsuccessful

vpnc version 0.5.3-mjm1-140M

IKE SA selected psk+auth-3des-md5

NAT status: this end behind NAT? YES -- remote end behind NAT? YES​

I've tried reinstalling everything but I get the same results every time. I'm hoping this information helps someone (and me)...