dns uses udp protocol :) On Wed, Oct 20, 2004 at 08:56:34AM -0400, Ronald I. Nutter wrote: > I am setting up a RHEL 3 box to take the place of one of our DNS > servers. Everything works ok until I bring up Iptables. I used > redhat-config-securitylevel to setup the rules. Here is what I am > currently using - > > # Firewall configuration written by redhat-config-securitylevel > # Manual customization of this file is not recommended. > *filter > :INPUT ACCEPT [0:0] > :FORWARD ACCEPT [0:0] > :OUTPUT ACCEPT [0:0] > :RH-Firewall-1-INPUT - [0:0] > -A INPUT -j RH-Firewall-1-INPUT > -A FORWARD -j RH-Firewall-1-INPUT > -A RH-Firewall-1-INPUT -i lo -j ACCEPT > -A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT > -A RH-Firewall-1-INPUT -p 50 -j ACCEPT > -A RH-Firewall-1-INPUT -p 51 -j ACCEPT > -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT > -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 53 -j > ACCEPT > -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j > ACCEPT > -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited > COMMIT > > I can SSH and do DNS lookups against the server without the rules in > place. With the rules in place, I can only SSH to the server. NSLOOKUP > starts reporting DNS timeouts. This is a single nic system. I am new > to iptables, so I had hoped this would get things running easier than my > trying to piece things together. > > Suggestions ? > > Ron > -------------------------------------------------------------------- > Ron Nutter ron_nutter@xxxxxxxxxxxxxxxxxxxxx > Network Manager > Information Technology Services (502)863-7002 > Georgetown College > Georgetown, KY 40324-1696 > -------------------------------------------------------------------- > > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
