NAT & Port Forwarding · Advanced · ~8 min

NAT troubleshooting

Diagnose a misconfigured ACL that silently excludes a subnet from translation.

Host

RouterPAT / overload

Internet

NAT access list, in evaluation order

access-list 1 deny 192.168.1.0 0.0.0.255

access-list 1 permit any

(implicit) deny any

This router's NAT overload rule only translates traffic its ACL permits. Test as written, then disable the line that's excluding this subnet.

Test packet source