[Asterisk-Users] Get SIP to work over very limited network access

[Benjamin Lawetz]

I've got a friend who's spending 6 months on the other side of the world. So
before he left I configured him a softphone on his laptop to connect to my
asterisk so he can call home free of charge.

Unfortunately, he just found out he has horrible internet connection.
Bandwith and latency is ok, the problem is the stop almost all connections.
He has to connect to a proxy server for his web access. The only thing that
seems to go through straight away is ssh or ftp. Thought about doing a ssh
tunnel, but that doesn't work over udp. He has linux and windows on his
machine, and is full configurable. The server (and my net connection) is
under my control and fully configurable.

So does anyone have any idea how to get him to connect to my asterisk server
through a TCP connection ?

thanks