[mdlug] SSH-from-laptop issues

[David Lee Lambert]

On Sunday 15 April 2007 09:36 am, Jason Taylor wrote:
> Can you use other network services without issue on your laptop (e.g.
> Samba, web browsing, FTP)? By SSH not working, do you not get a login?
> Do you get a login but username/pass rejected? How is your firewall on
> your laptop configured? Does SSH on your laptop work to other
> destinations?

To answer your questions,  all network services to all other hosts worked 
fine.  Neither SSH nor HTTP to the host in question worked.  I have no 
firewall on the laptop (kernel 2.6 compiled with IPtables support,  doing NAT 
from a VMware internal network, but it's not configured to block any 
traffic).  He didn't give an error-message;  they just waited to connect.

Today I looked at this again, and I think I've identified the likely culprit,  
although I'm not sure when I'll be back at my dad's house to test my new 
theory.  I have an entry in the "/etc/hosts" file on my laptop for the host 
in question, with an address in the private range I use behind the firewall 
at my home (for example, 192.168.77.0/24).  My dad's house uses a different 
private range (for example,  192.168.44.0/25).  When I used my laptop from 
foreign networks in the past,  I guess an ICMP unreachable message was 
generated,  forcing my laptop to look for another address;  but on this 
particular network,  the TCP SYN packets just disappeared.   

I don't really need to use a "hosts" file for that particular server anyway...

-- 
David Lee Lambert ... Software Developer
Cell phone: +1 586-873-8813 ; alt. email <as4109 at wayne.edu> or 
<lamber45 at msu.edu>
GPG key at http://www.lmert.com/keyring.txt
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