asterisk users - Dec 2006 - GXP2000, Linksys RV082 Firewall / NAT, Registrations

Hello,

We have several clients with GXP2000 in their network and behind NAT. We
have one particular client that has several GXP2000 behind a Linksys RV082
VPN Firewall/Router which is doing NAT services. According to SIP packet
inspection, it detects it's a symmetric NAT.

The problem we have is that even though we have configured Asterisk AND
the GXP2000 to register every 60 minutes, they keep unregistering and
re-registering every few couple of minutes (between 4 and 10 minutes).

We have checked the client's Internet connection and it's not bouncing
as
well as their local network is working stable.

So, the only thing we can think of why these phones are re-registering so
often is their firewall device since it's the only "difference"
between
this client and our other clients that use the GXP2000.

Does anyone have any idea why this is happening or how this can be resolved?

Thanks,
Daniel

Do you have STUN Enabled?   I had similar when I had STUN turned on.  I 
found it better to turn off stun and place in sip.conf   "nat=route".
Also use "NAT Keep-Alive" on the ATA that is < "NAT
Timeout" on the Router.

Good Luck,
Mark Coccimiglio
IS Director
Payroll Services Hawaii, Inc.
http://www.psh-inc.com

lists@infoway.net wrote:
>Hello,
>
>We have several clients with GXP2000 in their network and behind NAT. We
>have one particular client that has several GXP2000 behind a Linksys RV082
>VPN Firewall/Router which is doing NAT services. According to SIP packet
>inspection, it detects it's a symmetric NAT.
>
>The problem we have is that even though we have configured Asterisk AND
>the GXP2000 to register every 60 minutes, they keep unregistering and
>re-registering every few couple of minutes (between 4 and 10 minutes).
>
>We have checked the client's Internet connection and it's not
bouncing as
>well as their local network is working stable.
>
>So, the only thing we can think of why these phones are re-registering so
>often is their firewall device since it's the only
"difference" between
>this client and our other clients that use the GXP2000.
>
>Does anyone have any idea why this is happening or how this can be resolved?
>
>Thanks,
>Daniel
>
>
>
>_______________________________________________
>--Bandwidth and Colocation provided by Easynews.com --
>
>asterisk-users mailing list
>To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>
>  
>