DIDN'T ACCEPT THE CALL errors happen, when a TCP connection (signaling or H.245) cannot be made. This is ALMOST always due to NAT/firewall problems (or endpoints being offline). If one does not use H.245 tunneling, forwarding just signaling and RAS ports is not enough. Anyway, disabling H.245 tunneling is not the best idea, as GnuGk cannot handle race conditions during H.245 channel establishment correctly, so one can get calls failing randomly.
----- Original Message ----- From: "Stewart Nelson" <sn@xxxxxxxxxxx>
Sent: Sunday, November 14, 2004 7:36 AM
Hi Igi,
Wow. It indeed appears that GnuGK is acting as if it got a 'connection refused' from 62.65.191.19 port 32769, but it never even sent out a SYN packet to open the TCP. This is way beyond my expertise. Perhaps Michal knows what's happening. Otherwise, you may need to look at the code and/or add your own tracing statements.
However, you might try setting H245Routed=1 and turning off fast start in the client. The call still may not work, but the Setup will now be much simpler and it might get correctly forwarded to the parent GK. A later failure would then give a clue about what's wrong.
A few comments:
Do you have any control over the RadioLAN NAT? If not, unless IPhone has some NAT traversal logic, you may not be able to receive calls.
At my home in Reno, I am served by a similar wireless ISP (though no NAT is involved). The radio system is just a bridge, so I can connect multiple hosts to it with a switch, and be assigned several IP addresses by their DHCP server. If you can do the same, you could eliminate the cascaded NATs (if that proves to be a problem).
RCF received from parent GK contains IP of NAT box as signaling IP - shouldn't be the IP of parent GK sig. IP ? Line 177 of error stream Can be cause of this a nonStandardData 'IP=212.5.203.53' sent in RRQ ?
A agree that it seems wrong, but GnuGK should not be using that value, because it must send ARQ for every call. http://www.packetizer.com/in/q14.html
RRQ by IPhone contains external IP of Home NAT (uff) as sig. addr. Line 289
I would not expect that address to appear in any packets. I don't think that it relates to your present problem, but may cause trouble when you get further. I would suspect that your home NAT is somewhat H.323-aware, but IPhone (which I know nothing about) or the OS (e.g. Telephony service) could also be responsible. You could use Ethereal at home to see where this is happening, or try using a port other than 1719 for RAS (if IPhone permits it; set UnicastRasPort to match).
Good luck,
Stewart
----- Original Message ----- From: "Igi" <igurek@xxxxxxxxxxx>
To: <openh323gk-users@xxxxxxxxxxxxxxxxxxxxx>
Sent: Friday, November 12, 2004 3:02 PM
Subject: Unable to establish call: x.x.x.x:port didn't accept
the call error
Hello,
Recently I wrote to this list for help with NetworkInerfaces option, because I'm using NAT. There was a problem with sending wrong IP (local) to remote GK. When I added the NetworkInerfaces option, addresses have been sent correctly but it started to generate another error that wasn't there before.
This post can appear a little long :-) but I tried to write everything that I discovered till now and every detail of scenario used. I'll be very grateful if someone can help me with this because I'm desperate already. I hope this will be not only some little configuration error and I'll not look like dummest person on Earth :-)
Here is my scenario: GnuGK (Child GK) - 192.168.120.32 -> Company NAT (embedded device - router) - 212.5.203.53 -> Clarent GK (external Parent GK) - 62.65.191.19 IPhone - 192.168.1.100 -> Home NAT - 192.168.121.51 -> ISP NAT - 217.172.148.1 -> Internet -> Company NAT (dnat 1719, 1721 forwarded) - 212.5.203.53 -> GnuGK (NAT is everywhere grrrr :-)
So, with external IPhone I'm able to register with GnuGK with no problem, but when I try to establish a call to destination handled by parent GK phone sends ARQ this is resent by GnuGK to parent GK which respond with ACF to gnugk this is sent to phone respectively (this is OK) and then phone sent CS: setup OpenLogicalChannel to gnugk which generates error x.x.x.x:port (parent GK) DIDN'T ACCEPT THE CALL and relase the connection (CS: RelaseComplete) but no packets are sent to parent GK so why the error?
When I comment out NetworkInterfaces line I'm not even able to register with gnugk from external networks so I tried to call from localhost (the only option for me because I use SSH - no access to local net.) and had following result: I successfully registered with parent GK (with wrong signaling IPs - local), I registered to gnugk with ohpone, I tried to call destination handled by parent GK and no error appeared, destination was ringing and when I hanged up, call disengaged properly (I didn't tested RTP streams). So instead of error the setup message was sent to parent GK which responded and so on . I have no idea how NetworkInterfaces can modify the gnugk behavior in such way (I assume its purpose is only to assign correct IP addresses to signaling messages)
I logged everything that was possible to log, read capture file many times and still unable to identify cause of this. It seems like GnuGK simple rejects the CS: setup message with no wise reason (maybe bug ???)
I published the Ethereal capture file on adlerka.no-ip.com/capture-with-ifs GnuGK error stream trace level 5 adlerka.no-ip.com/error-stream-with-ifs GnuGK config file adlerka.no-ip.com/gatekeeper-with-ifs.ini Picture of scenario adlerka.no-ip.com/scenario.jpg
Here are some useful information while reading logs: Local IP of GnuGK: 192.168.120.32 Remote GK - Parent: 62.65.191.19 IP of NAT box: 212.5.203.53 My IPhone IP: 217.172.148.1
And here are some things that I discovered and are not clear to me:
RCF received from parent GK contains IP of NAT box as signaling IP - shouldn't be the IP of parent GK sig. IP ? Line 177 of error stream Can be cause of this a nonStandardData 'IP=212.5.203.53' sent in RRQ ? Line 81 IP address sent by IPhone contains local IP as signaling IP. Line 226 RRQ by IPhone contains external IP of Home NAT (uff) as sig. addr. Line 289 GnuGK sends nonStandardData 'NAT=217.172.148.1' to IPhone but it seems it's ignoring it. Lines 363, 421 In faststart sent by phone are local addresses. Line 718 . (c0 a8 01 64 - 192.168.1.100) but these are correctly rewritten by gnugk to 212.5.203.53. Line 844 . THE ERROR: 62.65.191.19:32769 DIDN'T ACCEPT THE CALL. Line 1712
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