How do you determine the model and IOS version of a Cisco router, if you have its IP address remotely, but have no physical access. For example, I run
nmap -sP and can see the router's IP, but all that's shown is "Cisco", and no information is given about its model or IOS version. Assume that we do not have a telnet client connection to the router, since we do not own the router. We just the Windows or Linux shell.
With these conditions, is there any way to get information, like as given in router advertisements, to get this detailed information about the router?