Pls try beow lines iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT echo "1" > /proc/sys/net/ipv4/ip_forward iptables -t nat -A PREROUTING -p tcp -i eth0 -d externalipaddress --dport 80 -j DNAT --to-destination 192.168.20.1:80 iptables -A FORWARD -p tcp -d 192.168.20.1 --dport 80 -m state --state NEW -j ACCEPT On Tue, Mar 29, 2011 at 2:36 PM, admin lewis <adminlewis at gmail.com> wrote: > Hi, > does anyone remember the rules for port forwarding ? > the followings does not work: > iptables -A FORWARD -i eth0 -o eth1 -p tcp –dport 80 -j ACCEPT > iptables -A PREROUTING -t nat -p tcp -i eth0 –dport 80 -j DNAT –to > 192.168.20.1:80 > > thx lewis > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -- Thank you Indunil Jayasooriya -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20110329/2c454613/attachment-0005.html>