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 Pinging STUN servers, "Port Restricted Cone NAT" This forum is for issues that do not relate to either a specific provider or a specific vendors hardware. General issues that affect the advancement of VoIP as a whole. |
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August 17th, 2006, 06:38 AM
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 Pinging STUN servers, "Port Restricted Cone NAT" Does a STUN server have to respond to ping requests? For example, pinging servers “stun.voipdiscount.com” and “stun.softjoys.com” does NOT return any reply, while pinging “stun.sipnet.ru” does. BTW, I tried all three STUN servers mentioned above with softphone “SJ-phone” connected to the Internet via my own wi-fi (via WRT54G router). With servers “stun.voipdiscount.com” and “stun.sipnet.ru” I get a message, something like "Blocked NAT". With server “stun.softjoys.com” I get a message "Port Restricted Cone NAT". Calls do go through with the latter. And, if I am not mistaken, even with the former.     |
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August 17th, 2006, 05:27 PM
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| RE: Pinging STUN servers, "Port Restricted Cone NAT&q A STUN server does not have to respond to ping requests. Ping uses ICMP and many locations block some or all of the ICMP traffic.
__________________ Eric Chamberlain, CISSP Chief Technical Officer Voxilla |
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