On Wed, 2008-04-30 at 15:01 +0100, Chris G wrote:
On Wed, Apr 30, 2008 at 08:55:32AM -0500, Aaron Konstam wrote:
I have two machines on a home network: cyrus - wireless saturn - wired
On cyrus : ping saturn and host saturn both fail saying saturn can't be found. However, ssh saturn works.
On saturn: ping cyrus works but host cyrus fails. ssh cyrus, works
I don't use iptables. Any explanations for this behavior?
Errors are like: ** server can't find saturn: NXDOMAIN
I suspect that some things use the local /etc/host bu others do not.
Certainly the 'host' command doesn't use /etc/hosts so that suggests:-
cyrus can't find saturn using DNS but saturn is in its /etc/hosts file so ssh works. saturn can find cyrus using DNS, it may well be able to find it using /etc/hosts as well.
I wonder if you have things set up so ping (ICMP packets?) are refused somewhere in the system so that ping will never work regardless of DNS, routing, etc.
I agree with your analysis but I don't understand the asymmetry of the behavior. I am unaware that I ban ping but that may be a DNS thing. -- ======================================================================= Whenever I feel like exercise, I lie down until the feeling passes. ======================================================================= Aaron Konstam telephone: (210) 656-0355 e-mail: akonstam@sbcglobal.net