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port forwarding
hi
I new in this site. I would i like to us some problem on my forwarding.
Am forwarding port 53 because am creating a dns server in our company. we had one one public ip. am successfully forward it but when the command is on our office don't have an internet. when i comment the command the internet connection is good and running. please i need you help thanks..
*nat
:PREROUTING ACCEPT [461:37247]
:POSTROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [2:104]
-A POSTROUTING -o ppp0 -j MASQUERADE
-A POSTROUTING -m mark --mark 0x9 -j MASQUERADE
-A PREROUTING -p udp --dport 53 -j DNAT --to 192.168.1.4:53
COMMIT
# Completed on Tue May 27 08:03:48 2008
# Generated by iptables-save v1.3.5 on Tue May 27 08:03:48 2008
*mangle
:PREROUTING ACCEPT [1559:478090]
:INPUT ACCEPT [555:40595]
:FORWARD ACCEPT [1004:437495]
:OUTPUT ACCEPT [331:31951]
:POSTROUTING ACCEPT [1336:469478]
-A PREROUTING -i eth2 -j MARK --set-mark 0x9
COMMIT
# Completed on Tue May 27 08:03:48 2008
# Generated by iptables-save v1.3.5 on Tue May 27 08:03:48 2008
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [331:31951]
:RH-Firewall-1-INPUT - [0:0]
-A INPUT -j RH-Firewall-1-INPUT
-A FORWARD -j RH-Firewall-1-INPUT
-A FORWARD -i eth2 -s 58.69.213.36 -j ACCEPT
-A FORWARD -p udp -d 192.168.1.4 --dport 53 -j ACCEPT -s 58.69.213.36
58.69.213.36
-A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
-A RH-Firewall-1-INPUT -i lo -j ACCEPT
-A RH-Firewall-1-INPUT -i eth2 -j ACCEPT
-A RH-Firewall-1-INPUT -i eth0 -j ACCEPT
-A RH-Firewall-1-INPUT -i eth1 -j ACCEPT
-A RH-Firewall-1-INPUT -s 58.68.213.36 -i eth2 -j ACCEPT
-A RH-Firewall-1-INPUT -p icmp -m icmp --icmp-type any -j ACCEPT
-A RH-Firewall-1-INPUT -p esp -j ACCEPT
-A RH-Firewall-1-INPUT -p ah -j ACCEPT
-A RH-Firewall-1-INPUT -d 224.0.0.251 -p udp -m udp --dport 5353 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 23 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 25 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 21 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 53 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 953 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 443 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 5900 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 3389 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m state --state NEW -m udp --dport 53 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m state --state NEW -m udp --dport 953 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m state --state NEW -m udp --dport 137 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m state --state NEW -m udp --dport 138 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 139 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 445 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 2049 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m state --state NEW -m udp --dport 3389 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m state --state NEW -m udp --dport 5900 -j ACCEPT
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
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