Cisco Router – How to Ping with Source Option

The issue has been resolved. When I checked the running configuration on the router, I noticed I have the line below under the line vty 0 4

access-list class 23 in

All I had to do was to negate the command and everything went back to normal.

Thanks all for your support.

Think about this very carefully.

Inside source means that you want to translate the source address from traffic originating inside your network. This is the typical "home networking" arrangement which allows you to use private addresses on the public Internet. Of course, this is not the only use for this version.

Inside destination means that you want traffic originating from an outside address to a particular destination transport protocol and port to go to a particular inside address. This is what home users do to allow something like a web server with a private address to be accessed from the public Internet. Of course, this is not the only use for this version.

Outside source translates traffic originating from outside to look like it originated from an inside address. It can useful in cases where companies with overlapping IP address ranges merge and need to start connecting the networks. You can translate the source addresses of traffic originating from the outside, which would normally have outside source addresses which conflict with inside addresses, to source addresses addresses in an available inside address range.

Outside destination doesn't really make a lot of sense since it is the inverse of port forwarding. This would limit any traffic originating from the inside, destined to a particular outside transport protocol and port, to a single outside address.