TELNET instead PING

[Serge A. Ribalchenko]

Gandalf wrote:


> Note: that reason you talked about is most likely a packet filtering 
> firewall. A good firewall
> can block PING, Telnet, Nbsession and many others. In most cases, the 
> best policy
> is to lock everything by default and permit only the ones you really 
> want. Firewall
> rules can include source addresses too. It is possible that a computer 
> do not respond
> on PING and TELNET ports for you but it does for a similar request from 
> another
> computer. I think there is no universal way to determine if a remote 
> host is alive or not.

If we are talking about IP network segment in the same ethernet layer, 
can you ignore my ARP request - who-has <your-ip> ?