Working with a Cisco 1841 router, I want to lock down email to come from only Postini.
I see many solutions for PIX firewalls, but not just routers.
Postini is at 22.214.171.124/20 or 126.96.36.199 255.255.240.0 or 188.8.131.52 through 184.108.40.206
This router also handles a voip channel on a different subnet and physical port
What is working now - before locking it down:
ip access-list extended serial0/0/0
permit tcp any host x.x.x.41 eq 3389
permit tcp any host x.x.x..42 eq 3389
permit tcp any host x.x.x.43 eq 3389
permit tcp any host x.x.x.42 eq smtp
deny ip host 255.255.25.255 any
deny ip host 0.0.0.0. any
I have removed the permit.... smtp with a NO
I have tried to add:
permit tcp 220.127.116.11 255.255.240.0 host x.x.x.42 eq smtp
What I get in response is:
permit tcp 0.0.0.0 255.255.240.0 host x.x.x.42 eq smtp
help please - my syntax must be in error...