Hi, I am not so good in netfilter/iptables I have Sendmail configured on my server and I am able to send and receive mails in the intranet. Now I want to be able to access the mails from outside world also but i dont want to open the port for every one. I want to open the pop3 port for the perticular IP (it may be static or dynamic IP) in the IPTABLES and close the port when not needed to access from outside. Please some one tell me how to do this and can I have some script which will open the port when i need and close when not needed so that I don't have to enter into the iptables every time. How to open the pop3 port for a perticular external ipaddress Please some one help me on this Thanks and Regards Vinod
