Hi

I need some help on the following problem with Iptables. Can anybody provide me with some help.

Server Details a) Our service provider provides us a catchall account & SMTP access. e.g. Server IP 10.10.10.10

b) We have a gateway firewall server with squid running. e.g. Server IP 55.55.55.55 (Live IP)

c) We have a email server running behind the firewall. e.g Server IP 77.77.77.77

To Do a) The email server should be able to send POP & SMTP requests to our email service providers server ie 10.10.10.10 via our gateway server

b) Users from internet should be able to access our internal email server i.e. 77.77.77.77 via our gateway server 55.55.55.55

Current Status a) I feel the following iptable code running on our gateway server will allow users from internet to access our internal email server. Please advice if this is right. (Note : eth1 - External Network Card)

iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE iptables -t nat -A PREROUTING -i eth1 -p tcp --sport 80 -j DNAT --to 77.77.77.77:80

I need to do this urgently and would require your precious contribution.

Regards

Joel 9820533294 (022) 56346700

Get Your Private, Free E-mail from Indiatimes at http://email.indiatimes.com

Buy The Best In BOOKS at http://www.bestsellers.indiatimes.com

Bid for for Air Tickets @ Re.1 on Air Sahara Flights. Just log on to http://airsahara.indiatimes.com and Bid Now !