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New Member

ATA 186 and Unreal IP's NAT


We want to make working ATA 186 in LAN with unreal IP's, . It will made registration with Cisco Gatekeeper located outside LAN with real IP's.

We have Socks5 server and Proxy running on LAN,

how to make working ATA 186 with Gatekeeper.

We have possibility to install NAT.

When we are trying to make registration on Gatekeeper, but unfortunately it's not possible, because ATA-186 is bringing unreal IP to gatekeeper.

Our VOIP system is based on H323.

Any suggestions ?




Re: ATA 186 and Unreal IP's NAT

Since there has been no response to your post, it appears to be either too complex or too rare an issue for other forum members to assist you. If you don't get a suitable response to your post, you may wish to review our resources at the online Technical Assistance Center ( or speak with a TAC engineer. You can open a TAC case online at

If anyone else in the forum has some advice, please reply to this thread.

Thank you for posting.

New Member

Re: ATA 186 and Unreal IP's NAT

I am using ATA186 with private IP NAT to real IP, and Callmanager is outside of my LAN (, and it works fine.

Probably you should check your ata186 configuration by going http://ata186_ip-address/dev and check the value for "NATIP", I think this value should be the real (NATed) IP. regards.