ping: unknown host yahoo.com

[rhonneil]

Hi Linux Geeks,

Have another error, hope you can help me, AGAIN?!

I'm having trouble with installing AMAVIS on my sendmail when installing CPAN modules with requires me to access their ftp site.

Then, I found out that I had error with resolving internet names. I can resolve from this server lately before I had this error.

the error appears everytime I "ping internet names" having an error:

unknown host

I can ping any public or private ip's. Can even resolve internet names. (My server also was a Caching DNS)

I am using RH9.0 with 2.4.22 kernel.

Here's my configs:

/etc/hosts
127.0.0.1 localhost.localdomain localhost
192.168.0.1 ns1.alsterph.com ns1 proxy
192.168.0.2 ns2.alsterph.com ns2

/etc/resolve.conf
search alsterph.com
nameserver 127.0.0.1
nameserver 192.168.0.1
nameserver 192.168.0.2

There was no firewall set on this machine and therefore nothing would possibly retrict it from pinging other computer (and lately was able to ping other pc). Also my gateway allows icmp_echo_request.

What could be the problem? Any suggestions?

TIA.
rhonneil

[Kernel_Killer]

Rather your DNS servers are set incorrectly in /etc/resolv.conf, or port 53 is not accessable to the server.

[rhonneil]

[quote author=Kernel_Killer link=board=4;threadid=7862;start=0#msg71833 date=1065186317]
Rather your DNS servers are set incorrectly in /etc/resolv.conf, or port 53 is not accessable to the server.
[/quote]

I'd check my /etc/resolv.conf entries, I think there was no problem since my other pc on the network had the same settings and were able to access/ping internet names.

Also, I checked my port 53 if it's listening using netstat -tpan which provides the following results:

tcp 0 192.168.0.3:53 0.0.0.0:* LISTEN
tcp 0 127.0.0.1:53 0.0.0.0:* LISTEN

note: this PC was a DNS Caching server.

Still having the problem, can't figure where was the problem emanated.

thanks for your help!
rhonneil