[fusion_builder_container hundred_percent="no" hundred_percent_height="no" hundred_percent_height_scroll="no" hundred_percent_height_center_content="yes" equal_height_columns="no" menu_anchor="" hide_on_mobile="small-visibility,medium-visibility,large-visibility" class="" id="" background_color="" background_image="" background_position="center center" background_repeat="no-repeat" fade="no" background_parallax="none" enable_mobile="no" parallax_speed="0.3" video_mp4="" video_webm="" video_ogv="" video_url="" video_aspect_ratio="16:9" video_loop="yes" video_mute="yes" video_preview_image="" border_size="" border_color="" border_style="solid" margin_top="" margin_bottom="" padding_top="" padding_right="" padding_bottom="" padding_left=""][fusion_builder_row][fusion_builder_column type="1_1" layout="1_1" spacing="" center_content="no" link="" target="_self" min_height="" hide_on_mobile="small-visibility,medium-visibility,large-visibility" class="" id="" background_color="" background_image="" background_position="left top" background_repeat="no-repeat" hover_type="none" border_size="0" border_color="" border_style="solid" border_position="all" padding_top="" padding_right="" padding_bottom="" padding_left="" margin_top="" margin_bottom="" animation_type="" animation_direction="left" animation_speed="0.3" animation_offset="" last="no"][fusion_text columns="" column_min_width="" column_spacing="" rule_style="default" rule_size="" rule_color="" hide_on_mobile="small-visibility,medium-visibility,large-visibility" class="" id="" animation_type="" animation_direction="left" animation_speed="0.3" animation_offset=""] PVT blocks, restricts or filters a few internet ports to protect our customers. When ports are known to cause vulnerability to the security and privacy of your information, PVT blocks it to protect you. This protects you from common worms and from dangerous services that could allow intruders access to your computer. Below is a list of the ports that are restricted by PVT. [fusion_table] PortTransportProtocolDirectionReason for Filtering 17TCP/UDPQOTDInboundUsed in DRDoS (distributed reflective denial of service) amplification attacks. Reference: https://www.us-cert.gov/ncas/alerts/TA14-017A 19TCP/UDPCharGENInboundUsed in DRDoS (distributed reflective denial of service) amplification attacks. Reference: https://www.us-cert.gov/ncas/alerts/TA14-017A 23TCPTelnetInboundN/A 25TCPSMTPBothPort 25 is unsecured, and Botnet spammers can use it to send spam. This does not affect PVT email usage. We recommend learning more about configuring your email settings to PVT email to use port 587. 111TCP/UDPNetBiosBothPortmapper used in reflective DDOS Attacks 135-139TCP/UDPNetBiosBothNetBios services allow file sharing over networks. When improperly configured, ports 135-139 can expose critical system files or give full file system access (run, delete, copy) to any malicious intruder connected to the network. 161UDPSNMPInboundUsed in DRDoS (distributed reflective denial of service) amplification attacks. Reference: https://www.us-cert.gov/ncas/alerts/TA14-017A 445TCPMS-DS/SMBBothPort 445 is vulnerable to attacks, exploits and malware such as the Sasser and Nimda worms. 1080TCPSOCKSInboundPort 1080 is vulnerable to, among others, viruses, worms and DoS attacks. 1433TCPMS-SQLInboundWorms, Trojans 1434UDPMS-SQLInboundWorms, SQLslammer 1900UDPSSDPBothPort 1900 is vulnerable to DoS attacks. UPnP 5351UDPSSDPBothPort 5351 is vulnerable to DoS attacks. NAT port mapping. Similar to UPnP [/fusion_table] [/fusion_text][/fusion_builder_column][/fusion_builder_row][/fusion_builder_container]