Ever since I entered Myanmar, I could not connect to my SSH
server anymore. I had anticipated port 22 to be blocked, so I bound
sshd onto port 443, which the government (would like
to but) cannot block. Nevertheless, the connection times out.
Is it really conceivable that they employ a content filter that can separate HTTPS traffic from other encrypted traffic? Isn’t SSH also just an SSL connection before the session negotiation commences?
I really wonder what they do, and even more how I could get around it. Obviously, a TCP- or IP-over-HTTPS tunnel would do, but I don’t have access to one right now.
Update: It seems that the real reason is that
port 443/tcp is expected to go through the proxy. Thus, you need to
connect to the proxy and establish a tunnel to the destination with
the CONNECT command. I’ve been told that the pre-compiled
OpenSSH binaries work well together with the pre-compiled
connect.exe.
