Avaya IP phone over VPN

Posted on 2013-10-23
Last Modified: 2013-11-20
Trying to troubleshoot IP phone over VPN. I have it working perfectly over raw internet but fails behind home router (netgear n600). I have tested behind a couple routers. I get the following on the Office FW in vpn logs:

013 Oct 17 21:10:38 [FVS336GV2] [IKE] ISAKMP-SA established for 66.???.???.178[500]-72.???.???.148[2070] with spi:72bf3460b4b9c3de:dc96cb77e46af93c_
2013 Oct 17 21:10:38 [FVS336GV2] [IKE] NAT detected: Local is behind a NAT device. and alsoPeer is behind a NAT device_
2013 Oct 17 21:10:38 [FVS336GV2] [IKE] NAT-D payload does not match for 72.???.???.148[2070]_
2013 Oct 17 21:10:38 [FVS336GV2] [IKE] NAT-D payload does not match for 66.???.???.178[500]_
2013 Oct 17 21:10:28 [FVS336GV2] [IKE] Setting DPD Vendor ID_
2013 Oct 17 21:10:27 [FVS336GV2] [IKE] For 72.???.???.148[2070], Selected NAT-T version: draft-ietf-ipsec-nat-t-ike-02_
2013 Oct 17 21:10:27 [FVS336GV2] [IKE] Received Vendor ID: draft-ietf-ipsra-isakmp-xauth-06.txt_
                - Last output repeated 2 times -
2013 Oct 17 21:10:27 [FVS336GV2] [IKE] Received unknown Vendor ID_
2013 Oct 17 21:10:27 [FVS336GV2] [IKE] Received Vendor ID: draft-ietf-ipsec-nat-t-ike-02__
2013 Oct 17 21:10:27 [FVS336GV2] [IKE] Received unknown Vendor ID_
2013 Oct 17 21:10:27 [FVS336GV2] [IKE] Beginning Aggressive mode._
2013 Oct 17 21:10:27 [FVS336GV2] [IKE] Received request for new phase 1 negotiation: 66.???.???.178[500]<=>72.???.???.148[2070]_
2013 Oct 17 21:10:27 [FVS336GV2] [IKE] Remote configuration for identifier "" found_

I have opened UDP 4500 / TCP 500

Question by:SNCSD
  • 2
  • 2
LVL 20

Expert Comment

by:Patrick Bogers
ID: 39595225

Over VPN you say, is it protected by IPSEC? need to ask because it doesnt go well when NAT is enabled. You should look into NAT-T. Read some about it here.

Author Comment

ID: 39595261
I will look into it. was there supposed to be a link?

LVL 20

Accepted Solution

Patrick Bogers earned 500 total points
ID: 39595268
Hi J.

Hmm that didn't went as planned, the link is here. Discard the fact it discusses Juniper hardware.

Author Closing Comment

ID: 39665008
Got me going in the right direction. unfortunately had to move on to other things before resolved.

Featured Post

Connect further...control easier

With the ATEN CE624, you can now enjoy a high-quality visual experience powered by HDBaseT technology and the convenience of a single Cat6 cable to transmit uncompressed video with zero latency and multi-streaming for dual-view applications where remote access is required.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
what kind of tasks do I need to conduct in order to configure ip-sec in AWS 1 44
slow vpn connection 9 77
VLAN Question 7 32
how to get delisted from spamhaus DBL 3 33
I recently purchased a Bluetooth headset called the Music Jogger (model BSH10). The control buttons on it look like this: One of my goals is to use it as the microphone and speakers for Skype calls. In that respect, it works well. However, I …
Hey there Heard about jingle, the add on for XMPP that enables point to point audio between two XMPP clients. No server config necessary. Actually quite a cool feature. However, how good is it if you can not use those voice capabilities to do a P…
After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…

860 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question