I configured "router on a stick" and NAT on a 2621 router using a DSL connection for Internet access. My hardware equipment and configurations are attached.
Host A or B can ping their own gateways and each other's gateways. However, host A cannot ping host B and vice versa. Host A or B both can telnet to, say Yahoo's Web server port 80. Netstat -a output showed that an http connection has been established. Both hosts can resolve DNS from an outside resolver. However, Internet Explorer said that "The page cannot be displayed."
Could anyone please help resolve the problems? Thank you in advance!