[Openswan Users] help with openswan iptables

[Arnel B. Espanola]

I'm having problem resolving hostnames or connecting to internet when my 
iptables (firewall) is enabled on my openswan server. I don't have 
problems connecting to the vpn server (openswan). I've enclosed my 
iptables settings below. Instead of doing trial and error I would like 
to ask the experts what should I add in the iptables to make it work? 
Sorry for my ignorance.

/etc/sysconfig/iptables
# Firewall configuration written by system-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 -p tcp -m tcp --dport 53 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m udp --dport 53 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp --dport 5353 -d 224.0.0.251 -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 ESTABLISHED,RELATED -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state -s x.x.x.x/24 --dport 22 
--state NEW -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp -m state -s x.x.x.x/24 --dport 22 
--state NEW -j ACCEPT
# OPENSWAN VPN
-A RH-Firewall-1-INPUT -ippp+ -j ACCEPT
-A RH-Firewall-1-INPUT -i eth1 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 500 -j 
ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 4500 
-j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 4500 
-j ACCEPT
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
COMMIT

Thanks.
-- 
Arnel