[yaman]

i have a sipura 2100 connected to a cable modem though WAN, meaning the sipura is acting as a router, on the LAN side it is conencted to a hub which is conencted to two PC.

internet is working alright, outbound calling is going through without a problem but incoming calls is resulting to busy signal for the caller.

the same setting has been the same since more than 2 month, but now it incoming is not working anymore.

i know that this might be a firewall issue, but the cablemodem is a modem only and not a router, so i wonder where the problem is coming from.
is it possible that the ISP has a firewall on their own level or not?


can anyone provide any suggestions?

thanks

[mberlant]

Who is your VoIP service provider? Does your 2100 show it is Registered properly with your provider?

[yaman]

yes it is showing that is is registered, i even gave my account details to a friend who use it on his x-light and he was able to receive a call without a problem, so it is definately not an issue of provider but an issue of either spa2100 or most probably networking or firewall issue.

thanks

[jcgalvezv]

Yaman:

In SIP Tab, NAT Support Parameters section, enable and confiigure a STUN server by setting STUN Enable: YES and STUN Server: stun.fwdnet.net:3478.

I guess it will solve your problem.

Juan C.

[yaman]

by the way i am not using FWD so i do not need stun in this case with the my existing provider. i needed to know if this is a possibility of a sipura 2100 or most probably an issue of networking or firewall

[DracoFelis]

Originally Posted by yaman

by the way i am not using FWD

Doesn't matter. STUN servers are somewhat "generic".

So you can (usefully) use the FWD stun server, even if you don't use FWD.

Originally Posted by yaman

so i do not need stun in this case with the my existing provider.

And you know that HOW? STUN frequently fixes a lot of "NAT traversal" issues (i.e. getting past your router).

You may need STUN, without realizing it! In fact, there is a chance that a proper STUN setup might fix your problem.

Why not give it a try, and see if it helps at all (or at least doesn't make things worse)?

Originally Posted by yaman

i needed to know if this is a possibility of a sipura 2100 or most probably an issue of networking or firewall

It may very well be a router/firewall "NAT traversal" issue. And if it is, STUN might fix the problem (or at least help). STUN isn't a "cure all", but a proper STUN setup will give a VoIP adapter a better chance at getting past a router/firewall properly!

BTW: Here are the STUN settings I use, that I find generally helpful on my SPA3000. Specifically, I think I've turned on the right combination of STUN settings (and not turned on features that can get in the way), for STUN to work in the widest variety of situations:

[yaman]

dracofelis,

i am not using FWD, i am using another provider who does not support STUN, i am using spa-2100 and it is connected to a cable modem through WAN and LAN to a HUB that is conencting two PCs. everythign was working fine for more than two month and suddenly you can call out but you cannot receive a call. so i did give my account details to a friend who installed it on his X-light in different evironement and the call was comingthrough without a problem. so it is definately not a provider problem, nowthe question i would like to know, if you are connected via cable modem that does not act as a router and your sipura 2100 is acting as a router where is the firewall coming from that is my question.

thanks

[mberlant]

yaman,

Could you PLEASE read some of the postings that have been updated even during this past week??? STUN is not a server side function, so there is no server in the world that can determine whether your client environment needs it or not! Your ISP is ignorantly saying that STUN is not required because it offers no value to themselves, the server. Conversely, its appropriate use is squarely in your court, the client side.

Did your friend with X-Lite disable his own STUN when he put your credentials in? I sincerely doubt it.

So, please look through the postings that describe (sometimes in great detail) just what STUN is and how it accomplishes its mission. Then, after you have tried STUN, please tell us of your results.

[jcgalvezv]

It will be pretty much easier to help people it they do what recommended.

Some people like MBerlant, DracoFelis, PhoneBoy and many others like me, spend a lot of time trying to help people that, apart from not knowing how to do things, don't do what recommended.

Juan C.

[yaman]

sorry guys for getting you angry, i will try and configure the sipura with stun and use fwd stun server as mentioned by dracofelis. is there a test tool to find out if the router in use is cone or symmetric, i did dowloaded winstun from http://sourceforge.net/project/showf...kage_id=102146

can someone explain to me how it works and how the test used can determine if my router is symmetric or cone.

thanks