It's hard to tell if it's bug in Empathy, telepathy-rakia, sofia-sip or network-manager-openvpn. Here is my case.
I have three SIP accounts: one for my company and two for personal usage, all three accounts work in "simple" case with single global IP address without NAT. I have following network setup that kills SIP connection: - my Wi-Fi is in 192.168.1.0/24 network and gives me default gateway and NAT - my VPN gives me _global_ IPv4 and IPv6 addresses, I __don't__ use VPN as default gateway and route only "enterprise" networks via VPN tunnel - my virual 10.0.1.0/24 network connects me with virtualboxes I use for development When VPN is disconnected telepathy selects 192.168... address for outgoing packets and all three SIP accounts work like charm. When VPN is __connected__ telepathy selects VPN IP address as source address. So, kernel routes packets via Wi-Fi network (!), not via VPN for two accounts of three. "company" account still works as it's reachable both via VPN and without it. Packets routed like that may be dropped due to various reasons - NAT, reverse-path filter, etc. The reason does not matter much. Bottomline - there are several ways to fix the issue. 1. add proper source-based routing setup to network-manager. In my case all SIP calls will be routed via VPN with this configuration as sofia-sip library prefers VPN address over everything else. It's not good in terms of latency, but it works. 2. update local-ip-address in SIP settings on network connectiviy change I implemented NetworkManager dispatcher script that sets local-ip-address using IP routing table. It does not look like generic solution, but it works for me: https://github.com/darkk/home/blob/master/bin/nm-sofia-reroute 3. add option to sofia-sip library to disable complex source address selection I've not actually tried it, but the script does alike job. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to empathy in Ubuntu. https://bugs.launchpad.net/bugs/1058365 Title: Empathy (telepathy-sofiasip) cannot connect to SIP server via VPN Status in “empathy” package in Ubuntu: Incomplete Bug description: Hi, All! I am on Ubuntu 12.04 amd64 and I connect to my office network using Cisco VPN (network-manager-vpnc). The problem is that Empathy (with telepathy-sofiasip installed) cannot connect to a SIP-server inside VPN (while e.g., Ekiga can). Some traces taken with Wireshark show up that Empathy sends packages into the VPN tunnel with properly resolved destination IP-address but with wrong source IP-address (eth0 instead of tun0). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/empathy/+bug/1058365/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
