Netgear WNR3500L Router

The WNR3500L is a wireless router that requires a few small adjustments in order to ensure the best quality of service. Please follow the instructions below to prepare your WNR3500L for VoIP.
Firmware Reviewed: V1.2.2.30

Note: Netgear has removed the option to disable SPI, and they have renamed it DoS Protection. This is the same feature, with a different name.


  1. Navigate to the routers web interface. Usually at http://192.168.1.1.
  2. The Default Login Credentials are:
    • Username/Password [ Username: admin     Password: password ]
  3. Select “WAN Setup”.
  4. Check the “Disable SPI” box so that SPI is disabled.
  5. Check “Disable SIP ALG” so that SIP ALG is disabled.

Please review the screenshot below to assist in the process.