joy333
asked on
To test the port forwarding
Is there any simple way to check whether ports are opened or not remotely?
If i do the telnet on public address with forwarded port number (in command prompt) and comes another blank screen, does that mean that port is forwarded correctly!
OR it really doesn't indicate port forwarding working correctly............is there any other simple way to check?
Thanks!
If i do the telnet on public address with forwarded port number (in command prompt) and comes another blank screen, does that mean that port is forwarded correctly!
OR it really doesn't indicate port forwarding working correctly............is there any other simple way to check?
Thanks!
As Kalti says it depends on the protocol being used. Usually if the screen goes blank you're OK.
If you are testing port 80 (http) entering /get followed by Enter will usually get you some HTML.
Cheers,
Gary
If you are testing port 80 (http) entering /get followed by Enter will usually get you some HTML.
Cheers,
Gary
Hello,
you can use nmap from:
http://www.insecure.org/nmap/
to check for ports open remotely and a tcpwrapper [I'm arbitrarily assuming you are using linux or unix] that listens for port scans, like portsentry, to guard against abuse.
Hope that helped ;)
you can use nmap from:
http://www.insecure.org/nmap/
to check for ports open remotely and a tcpwrapper [I'm arbitrarily assuming you are using linux or unix] that listens for port scans, like portsentry, to guard against abuse.
Hope that helped ;)
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Yeah for common ports like 110, 25, 21, 23, 80 i can see the blank screen coming on. But if i can want to see special ports for example like Remote Desktop, Game server port how can i simply check.
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Thanks joy333,
--Rob
--Rob
SMTP For instance will answer with something like this:
"220 SMTP service ready"
However, some services will just be blank... so, to answer your question; maybe. Hehe... depends on the service.