cisco 2651XM router
IOS = C2600-ADVENTERPRISEK9-M, Version 12.4(2)T
adsl wic card fitted - Dialer0
I'm using one of my PC's as a mail server and for security I was wondering if there's a way to configure the cisco firewall to only allow incoming requests from IP addresses I specify. The IP's in question will be out there on the internet, not on my LAN. All other IP addresses would be blocked.
If the adventerprise IOS I have loaded will not do this I also have the c2600-advsecurityk9-mz.124-9.T1.bin IOS.
Thanks for any pointers.