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Old 10-22-2003, 09:03 AM   #1
proteo
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Registered: Oct 2003
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Question Ports used by a SSH Connection


Hi, I have this particular problem:

I'm Using a Linux Redhat based server for several task on a client's organization, but they have an Microsoft ISA Server 2000 as a firewall solution for the internal perimeter.

When inside the LAN I make a telnet call to the server the telnet window displays correctly the login screen so I can validate to the Server without any problems. But when Outside the firewall I try to do this there's an error "Connection to host lost".

I've already created the protocol definitions on the ISA Server for the telnet port (TCP#23) and as some specialist told me also created the protocol definition for SSH port (TCP#22). I tried many ways to allow the ISA Server to let the access to the Linux Server but the result is always the same.

So my question is actually, wich ports should I open for the ISA so it allows the access to the Linux, and How does this telnet connection works?

Really hope you can help me.

Regards.
 
Old 10-22-2003, 09:15 AM   #2
g00$e
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Don't use telent. It is insecure.

Use SSH. It you need a Windows SSH client check http://www.chiark.greenend.org.uk/~sgtatham/putty/

SSH is transmitted on port 22.
 
Old 10-22-2003, 09:27 AM   #3
proteo
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Thanks

Now, If I want to allow other users to access the server via SSH through a Firewall, Wich ports should I Open to do this?

And Is that possible?, I mean Linux allow remote users to access via SSH?

Regards
 
Old 10-22-2003, 09:30 AM   #4
g00$e
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SSH is the standard means to access Unix/Linux servers. This traffic is transmitted on port 22. To connect from one Linux machine to another from the shell type:

ssh -l login_name host_name

Type 'man ssh' from the command line for more details.
 
  


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