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Old 04-28-2004, 10:01 AM   #1
PlatinumRik
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Registered: Feb 2003
Location: Buffalo, NY
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ping not resolving names - iptables


I am using iptables and i was able to setup the chains to accept pings (icmp), i set the same rule for the output as the input "-A INPUT -p icmp -j ACCEPT" "-A OUTPUT -p icmp -j ACCEPT" but am still not able to resolve names on the box. I can ping everything by ip address but not name. when i shut down the iptables service i can ping everything by name so this leads me to believe that it's a iptables config issuse. what needs to be opened for pings to resovle?

Rick
 
Old 04-28-2004, 08:09 PM   #2
Capt_Caveman
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Sounds like the problem is with DNS hostname lookups rather than with the ping traffic itself. Try allowing DNS traffic in and out to your ISPs DNS servers.
 
Old 07-29-2004, 12:32 AM   #3
eyewittness
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Make sure u have the folowing rulez:

#Enable Nameresolving
$IPTABLES -A OUTPUT -o eth0 -p udp --destination-port 53 -j ACCEPT
$IPTABLES -A INPUT -i eth0 -p udp --source-port 53 -m state --state ESTABLISHED -j ACCEPT

#Enable icmp this also fix that people or hackers cannot ping u from the outside world./inside.
$IPTABLES -A INPUT -p icmp --icmp-type echo-request -i eth0 -j ACCEPT
$IPTABLES -A OUTPUT -p icmp --icmp-type echo-request -j ACCEPT
$IPTABLES -A INPUT -p icmp --icmp-type echo-reply -j ACCEPT

This wil fix the prob.
After u have checked your resolv.conf file

have fun

EyeWiTTneSS
 
  


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