From Jie Xu
> Yes sir, you are right. The ping does not work. I have successfully installed
> PCP in another node, say B, which can poll node A. But node A can not poll
> B. That means some network services in node B is not open. But I can still use
> ssh and sftp to connect the two nodes. I am not sure what service it is to
> accept PCP connection request.
> Thank you very much for your help. I am really grateful.
ah, in that case, you must have some sort of firewall between the two
or network security installed on the machine.
If linux, it's probably iptables. "iptables -L -n -v -t filter" or
"iptables -L -n -v -t nat" will likely show you which machine is blocking
packets for everything but port 22. If you can open up port 4321,
that will allow the pcp server to accept connections from the network.
Be sure to turn on the appropriate security features of pcp, and/or only
open port 4321 to your local network, otherwise everyone in the world
will be able to access your machine.
'telnet remote 4321' from the client machine can help verify if the port
is open or not.
- Kevin Wang