[nmglug] SSH problem

[Todd Richardson]

I'm 0 for 10 on my network troubleshooting this week, but here goes:

Depending on how you set your network up, you may have an incorrect
route between the two machines.   

A bit more background may help resolve the problem.  Is this a
completely new subnet, or is it just a new host on an established subnet
in your network?

This is what happened to me earlier this week on a virtual machine
behind a virtual router connected to my main network. Basically, I had
setup the incorrect gateway on the virtual router, so that My actual
router was sending the packets (good enough for ping) but the virtual
router was basically black-holing the packets from the remote machine.  

I wish I knew more about open-ssh to answer your second question.  I
would think that you would at least get a connection refused if it is
configured to allow local subnet, but I simply don't know for sure.

-Todd Richardson

On Fri, 2008-03-21 at 10:28 -0600, Bill York wrote:
> Hi all,
> 
> I'm having an issue getting to a new host over ssh. I can get in to it
> on the local network, but not from a remote network. The network based
> firewalls are not an issue as I can get into other hosts on the same
> network. iptables is not an issue since i've temporarily disabled it.
> 
> a tcpdump on the remote host shows connection attemps, but no acks. 
> 
> is it possible to configure ssh to not respond to requests from
> outside the local subnet?
> 
> OS: fedora core 8
> 
> bill
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