I have an 1841 Cisco Router, WAN is taking link from PPPoE provider with the help of Dialer 0 interface, also enabled NAT.
1. The issue is that from an PC on the LAN I am able to access from Thunderbird POP mail account(port 110) but I get "could not connect to mail server" when trying IMAP(port 143), both ports are set with rules on the web server on LAN 192.168.0.10:
ip nat inside source static tcp 192.168.0.10 110 interface Dialer 0 110
ip nat inside source static tcp 192.168.0.10 143 interface Dialer 0 143
2. Another issue is regarding the access of domains hosted on the web server 192.168.0.10 from an PC on the same LAN. From external I can access just fine the domains but from LAN I can't.
Attached is the sh run, masked external IP's and passwords
