11-15-2004 06:05 PM - edited 03-09-2019 09:27 AM
I have a CISCO 1711 Security Router (Firewall feature set) that is our connection to the Internet. I am using NAT overload (PAT) and want to open a port to a mail server on the inside. Can I do this by just adding an entry in the acl for the outside interface and then using an ip port-map smtp port 25 list xx command.
Thanks
Gary
11-15-2004 11:45 PM
hello gary..
you have to do a static NAT to the server before proceeding to open the ports.. on the router use the command:
ip nat inside source static ......
give the inside and the outside ip addresses... then proceed with the access-list command which will allow only port 25 access from outside...
All the best !!
11-16-2004 12:15 AM
hello Gary ,
All the Ports in Cisco IOS are open by default , until & unless you have made a access-list to block certain applications.
Thanks
Vijay Tyagi
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