On Sun, 5 Jan 2003, Borges, Jenner Gigante (BR-Paulista Seguros) wrote:
> Hi,
> I configured my resolv.conf on REdhat 7.1 to point to my DNS servers but I
> can not ping by name yet, just by ip , what more do I have to do ?
> Thanks in advance.
>
If you have a firewall, it must have source port 53 ("domain") open to
your DNS servers for protocol udp. I'll suppose for now that you use
ipchains, not iptables. If the firewall is set up to block some ports (as
you could see from lines "DENY" or "REJECT" shown in the first column of
output with the command "ipchains -L -n") then the firewall probably is
set up to block your DNS servers unless it explicitly ACCEPTs source port
53 (shown as "53 -> *" in the last column from "ipchains -L -n"). You can
also see if the firewall is blocking messages from your DNS servers by
temporarily bringing it down and trying pinging by name.
--
Steven Yellin
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