sshd and IPv4 forwarding no longer working

[NoOp]

On 01/21/2009 05:01 PM, noah wrote:
> Hi there,
> 
> I performed a recent upgrade and possibly openssh got upgraded as well.  
> I dont know and I am not sure how to figure that out with apt-get.
> 
> anyways somewhere in the past day or so I am no longer able to ssh to my 
> ubuntu server.  I can see sshd running  but I am not able to receive a 
> prompt from the daemon.  Here check this out.  I am able to ssh locally 
> but not from another server.   I am also finding that I am unable to 
> forward IPv4 traffic through the server.  Most likely the two are 
> related.  I am trying to figure out how I can troubleshoot this since 
> sshd is showing it is running.
> 
> I use firestarter for my firewall but even disabling the firewall I am 
> unabel to forward traffic nor does sshd answer port 22.  This was 
> working up until a day ago.  Now something was changed during an upgrade 
> and no longer can I use my server. 
> 
> here are version and /etc/ssh/sshd_config details.
> 
> noah at tsunami:~$ /usr/sbin/sshd -V
> OpenSSH_4.7p1 Debian-8ubuntu1.2, OpenSSL 0.9.8g 19 Oct 2007
> 
> $ cat /etc/ssh/sshd_config
> # Package generated configuration file
> # See the sshd(8) manpage for details
> 
> # What ports, IPs and protocols we listen for
> Port 22
> # Use these options to restrict which interfaces/protocols sshd will bind to
> ListenAddress 0.0.0.0
> #ListenAddress ::

Perhaps because you have the listenAddress set to 0.0.0.0? Here is that
portion from mine:

# What ports, IPs and protocols we listen for
Port 22
# Use these options to restrict which interfaces/protocols sshd will bind to
#ListenAddress ::
#ListenAddress 0.0.0.0

If you actually have a valid 'ListenAddress', then I _think_ that you
need a valid IP there. Try commenting out with the # and then:

sudo /etc/init.d/ssh restart