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  1. ACK is not received Error.

    Richard, you are of course correct and my configuration is by no means "perfect". The port forward approach would be much more suited to my needs but my problem is that my external IP can change on occasion with link failover etc. What I actually want 3CX to do is use STUN purely to establish...
  2. ACK is not received Error.

    I managed to get VOIP Unlimited working without using any inbound port forwarding and using NAT translation through my firewall with STUN. It actually fails the firewall check within 3CX but works perfectly and is extremely stable. The downside to port translation that have found is that it...
  3. ACK is not received Error.

    what is extension 555?
  4. ACK is not received Error.

    what firewall are you using? are you using the same king of SIP setup with SIPGate? Is this a problem with incoming, outgoing or both lines? can you turn on a full verbose debug and paste the file with just a single call?
  5. ACK is not received Error.

    ok, you're in luck all my lines go via VOIP Unlimited and I don;t have any issues at all so here is my configuration for the VOIP provider as that is probably the best place to start. Clearly your network setup is working otherwise you would be seeing similar issues with sipgate. VOIP Provider...
  6. ACK is not received Error.

    Out of interest, in the field Settings> STUN Server > Public IP to specify in Contact and SDP - do you have anything set. I know the field is greyed out if "Turn off STUN server" is not ticked but regardless of if it is greyed out or not is there anything set in there? Cheers, Dom. PS. If...
  7. ACK is not received Error.

    I have the same scenario, and I always find it is best to use STUN in this circumstance as it just seems to sit better with NAT in the router. Why don't you try enabling the STUN servers and setting them to stun.3cx.com and stun2.3cx.com, ensuring you have the "Keep Alive" option set in one of...
  8. ACK is not received Error.

    Hi, sorry to sound dumb but I'm not sure I follow. You would normally have a private IP (192. or 10. or 172.) on the 3CX server with a public IP on the Firewall with NAT OR.... you would have a public IP on the 3CX server with the firewall not doing NAT You seem to have a bit of both?
  9. ACK is not received Error.

    are you running a public IP address on your 3CX server or is your firewall doing NAT?
  10. ACK is not received Error.

    what firewall are you using and what is your configuration setup? Are you using STUN or not?
  11. ACK is not received Error.

    For all people experiencing this problem here is a solution. If there is anything listed in the Settings > Nextwork > STUN Server > "Public IP to specify in Contact and SDP" field then the 3CX system will use this in the SIP "Contact" message regardless of whether you have STUN turned on or...
  12. ACK is not received Error.

    Will do. My post here was really just to let others who might still be struggling with the issue that I had found the bug and it was being worked on. Thanks for your help. Dom.
  13. ACK is not received Error.

    Hi Nicky, I have a log open with support that proves this issue really clearly. If you want, I can send you a copy of the log and the wireshark trace that explains this. My only concern is I don't want everyone working on it and you duplicating efforts. I cannot attach the wireshark log to...
  14. ACK is not received Error.

    Yes, I did this and it was still a problem.
  15. ACK is not received Error.

    Hi Guys, I have recently moved from v7 onto the latest v8 platform and immediately hit this error. What I am finding is that the portion of the "Contact" message back to my SIP provider after the "@" symbol should be set to STUN resolved public IP address and port. Instead of this it is...
  16. REVIEW INVITE SOURCE

    I'm glad you found this information useful. I'm not really sure myself what use the field is on the front window as you still have to define the individual DID numbers behind the VOIP provider as well in a separate list so I'm not sure why the system cannot use that?
  17. Issues with Registration after STUN Change

    I am having some problems with re-registration following an ISP failover scenario. Our example is as follows .... a 3CX Windows 2003 server with local IP 192.168.1.1 and a Draytek router with local IP 192.168.1.2 (default gateway for the 3cx server). The Draytek has two WAN interfaces, one on...
  18. REVIEW INVITE SOURCE

    Problem solved .... thanks to some pointers above from "discovery1" and a good night's sleep it all came clear this morning. I thought I'd write up my findings in case anyone else finds them useful. Historically we have always used the "source identification" in the VOIP Provider to trigger...
  19. REVIEW INVITE SOURCE

    Hi, I am having a lot of problems with REVIEW INVITE source errors for my DDI numbers. I'll details as much as I can but if there is anything obvious anyone thinks I have missed please let me know and I'll post the extra. I'm not sure if I have found a bug or just missing something obvious...
  20. Voip Unlimited losing registration

    Tim, just out of interest, are you using a selection of firewalls or do you try and stick to one specific device you know works well. I'm currently routing in over a single netgear bridge and straight onto a spare NIC in the server but I want to try and implement some sort of failover and I...
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