I used to ssh to my linux box over port 80 and life was great… A couple of days ago corporate HQ updated their firewall and since then I can not connect anymore. I tried ports 80, 443, 21 (these are the only ones open to my firewall ID), but none of them work. Weird thing is that sometimes I can connect, for a couple of seconds, 1 minute max, then I get disconnected…
Some examples from the log on the linux box:
-the case when I get connected and then disconnected :
sshd[1599]: fatal: Read from socket failed: Connection reset by peer
- the case when I can not connect at all:
sshd[1826]: fatal: Timeout before authentication for x.x.x.x



I am not sure whan firewall corporate HQ has set up, all I know is that I use Firewall-1 Authentication Agent 4.1 (by Checkpoint Software) to log in and get access to the internet.

Any ideas?

Thanks
N.

Maybe the firewall got smarter and expects usual HTTP traffic on that port. Maybe setting the sshd at 40000 would go through or at its port of 22.

I've tried port 22 already and its not working.... I will try port 40000 but I suspect that wont work as well...
Can a firewall filter port 80 only for http trafic? That means port 21 must be filtered for ftp traffic only as well?

If it's an application level firewall or does proxying, then simply running a service over a certain port often won't work.

Something like http-tunnel might help.

http://www.nocrew.org/software/httptunnel.html

Thanks a lot for the link. I works like a charm. I think the connection is a bit slower then it used to be (I use VNC to connect to my windows desktop), but I can live with it.


thanks again.