I am running into a problem with a Cisco 1811 router. This router has 2 WAN ports and 8 LAN ports. Connected a laptop to FE 9 port , and WAN to FE 0. Can ping public ip addresses, internal ip addresses (10.10.100.1 vlan100) and laptop dhcp ip address from router. Though unable to ping public ip addresses from laptop (can ping internal router ip) Config attached..