Verify Connectivity

[MikeL_4]

Is there a way to verify network connectivity from one server to a certain Port on another server ?

[A. Clay Stephenson]

telnet hostname portnumber

(assuming that tcp rather than udp protocol is used).

Whether or not meaningful communication can be established via this method depends upon the listener's protocol on the other end.

[MikeL_4]

I assume that even though it's telling me the connection is closed by foreign host that it is communicating with the remote server on that port even though it's not allowed to log in ??

root:[/root]: =>ssh 155.90.230.205 -p 3001
ssh_exchange_identification: Connection closed by remote host
root:[/root]: =>telnet 155.90.230.205 3001
Trying...
Connected to 155.90.230.205.
Escape character is '^]'.
Connection closed by foreign host.
root:[/root]: =>