IPTABLES port forward

wanaka · 09-02-2004, 10:00 PM

Hi,

I am new to iptables. I need to forward all the https port 443 to port
7502. How should I do this in iptables? Is there anyway I can edit the configuration file so that after next reboot the policy is there. I am using redhat linux AS 3.0.

ppuru · 09-03-2004, 01:28 AM

Is this for your local traffic?

iptables -t nat -A PREROUTING -i <internal NIC> -p tcp --dport 443 -j REDIRECT --to-port 7502

if it is external traffic going to another system

iptables -t nat -A PREROUTING -i <external nic> -p tcp --dport 443 -j DNAT --to-destination <ipaddress>:5702

phatboyz · 09-03-2004, 08:04 AM

That will work or you could try http://www.iptables-script.dk/

win32sux · 09-28-2004, 07:07 PM

Quote:

Originally posted by ppuru
if it is external traffic going to another system

Code:

iptables -t nat -A PREROUTING -i <external nic> -p tcp --dport 443 \
-j DNAT --to-destination <ipaddress>:7502

yup, but don't forget the accompanying FORWARD rule needed to make that work:

Code:

iptables -A FORWARD -p tcp -d <ipaddress> --dport 7502 -j ACCEPT