How to Disable SIP ALG on Netgear Routers

SIP ALG is used to try and avoid configuring Static NAT on a router. Its implementation, however, varies from one router to another, often making it difficult to inter-operate a router with SIP ALG enabled with a PBX. In general, you would want to disable SIP ALG and configure one to one port mapping on the router.

In this article, we will show you how to disable SIP ALG on a Netgear router. SIP ALG on this router is known to cause problems with VoIP calls.

Follow this step-by-step guide:

Option 1:

  1. Open the Netgear router configuration by browsing to its LAN Address (http://192.168.0.1 by default).
  2. Log in to the router’s configuration. The default username is “admin” and the default password is “password”.
    Netgear WAN Setup
  3. In the main menu, select “Advanced” > “WAN Setup”.
  4. Enable the option “Disable SIP ALG”.
  5. Click “Apply”.

Option 2:

  1. Open the Netgear router configuration by browsing to its LAN Address (http://192.168.0.1 by default).
  2. Log in to the router’s configuration. The default username is “admin” and the default password is “password”.
    2016-09-05_16h49_00
  3. In the main menu, select “Security” > “Firewall” > Advanced.
  4. Uncheck the option “Enable SIP ALG”.
  5. Click “Apply”.

Notes

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  1. Still have problems with remote users. Waiting till day remote users work consistently. Especially today with so many apple and android users.

    October 13, 2012 at 12:42 am
    • @Keith – remote users already work consistently. However it would be good to check what the problem is in your case.

      October 15, 2012 at 1:28 pm
  2. Nicholas Sciberras

    @Keith, try using the procedure to troubleshoot remote extensions. You will be able to better identify the source of the problem.

    October 15, 2012 at 2:04 pm