pinging using DNYDNS TOOL

[RADIOWAVES]

Could someone please tell me if I should be able to ping all the ports ie audio, sip,cmd, web svr. using the DNYDNS ping tool through my external ip address?

Thanks

Fred

[KR3JA]

Fred,

You can ping the IP and see if the node is alive, but you can't ping a specific port.  To see if the port is alive, you need a port scanner tool.

Pinging the SIP, CMD and Audio ports requires a UDP port scan utility - you can't "ping" them directly.  Read here for more info - especially the part on UDP scanning: http://en.wikipedia.org/wiki/Port_scanner

Try a tool like NMap which can do TCP and UDP port scanning: http://nmap.org/

73
Jim KR3JA

[dj0qn]

Jim is correct, but I need to add one thing that has caused some people to get confused:

When you ping your DynDNS address, you land at your router. Often, the result of a ping will
be a timeout. This is because ICMP reply is often turned off by default for security reasons.

If you receive a timeout when you ping your router, you need to turn "ICMP packet reply" or
similar on. This is usually under the firewall or security settings.

73,
Mitch DJ0QN / K7DX

[RADIOWAVES]

Thanks Mitch and Jim
I understand and Jim I will download Tool and try it.

most helpful

73
Fred W1FC