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Old 10-08-2004, 09:56 AM   #1
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Registered: Oct 2004
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Unhappy New firewall: ssh on port 80 not working anymore...

I used to ssh to my linux box over port 80 and life was greatů 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 disconnectedů
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?

Old 10-08-2004, 12:21 PM   #2
Registered: Oct 2004
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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.
Old 10-08-2004, 04:42 PM   #3
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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?
Old 10-09-2004, 02:38 AM   #4
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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.
Old 10-09-2004, 10:14 AM   #5
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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.


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