iptables (Re: Connection Refused on ssh)

[Janina Sajka]

Yes, but you still haven't shown us anything that confirms whether (or
not) sshd is actually running.

I've suggested nmap (which is installed with a Fedora or Redhat
"everything" install). Others have suggested more primitive strategies,
such as looking for pidof sshd, or telnet [address] 22, which also
works.

Is there actually an sshd listening at that machine/s address, whatever
it happens to be?

PS: To get iptables out of the way (certainly an important thing when
debugging) do:

service iptables stop

John J. Boyer writes:
> John,
> 
> I really think the problem may be with iptables. We've eliminated just
> about everything else. H?owever, there is no ma pagel for netconfig, and
> when I tried running it, I wasn't sure what to do. Really, all I need is
> to let one IP address use ssh. There is a man mage for iptables, but it
> looks so complicated that I wouldn't want to mess with it unless I knew
> exactly what I was doing.
> 
> Thanks,
> John
> 
> 
> On Fri, 8 Oct 2004, John Heim wrote:
> 
> > At 11:22 AM 10/7/2004, Mike Gorse you wrote:
> > >Also, are you sure that sshd is running on the machine (ie, pidof sshd 
> > >returns something)?  If so, then try using ipchains or iptables to make 
> > >sure it isn't being firewalled.  At one point we had a RH box at work on 
> > >which I was trying to enable ssh, but the person who installed rh had 
> > >selected an option for a firewall, so I wound up needing to edit a file in 
> > >/etc/sysconfig (the file did say that manually editing it was not 
> > >recommended, but it didn't say how I was supposed to edit it if not 
> > >manually) to tell it to accept connections on port 22 as it did for 23 and 
> > >others.
> > 
> > 
> > You can run  netconfig. It would allow you to allow ssh connections through 
> > your firewall. When you exit, it saves it's settings in 
> > /etc/sysconfig/iptables. That file is the one that says you shouldn't edit 
> > it manually.
> > 
> > That netconfig program is pretty limited in what it can do.   And the file 
> > it creates has the same format as iptables-save.  So what you can do is 
> > issue iptables commands until you've got your firewall configured just the 
> > way you want it thand do this:
> > 
> > $ iptables-save > /etc/sysconfig/iptables
> > 
> > The next time you reboot, your firewall will be just like it was when you 
> > issued the above command.
> > 
> > 
> > 
> > 
> > 
> > _______________________________________________
> > Blinux-list mailing list
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> > 
> 
> -- 
> John J. Boyer; Executive Director, Chief Software Developer
> Computers to Help People, Inc.
> http://www.chpi.org
> 825 East Johnson; Madison, WI 53703
> 
> 
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-- 
	
				Janina Sajka, Chair
				Accessibility Workgroup
				Free Standards Group (FSG)

janina at freestandards.org	Phone: +1 202.494.7040