Beware of Netgear FVX538 running firmware 3.0.5-24

Discussion in 'General' started by wrf911, Sep 3, 2009.

  1. wrf911

    Aug 20, 2009
    Likes Received:
    I just finished diagnosing some severe problems with my Elastix configuration and though I would share the solution. I explored many blind paths, but ultimately found that the latest firware release for my Netgear router was to blame. Specifically, the (otherwise reliable) Netgear FVX538 running firmware 3.0.5-24 (the latest) has a bug in the way it handles SIP. A SIP ALG feature was introduced with this firmware, but there is no way to disable it. The only fix it to downgrade the firmware to 3.0.4-19. Alternatively, you can beg Netgear support for a beta version of 3.0.5 which has SIP ALG disabled. Here are the specific symptoms I experienced, there may be more.

    - Using the Voice Pulse ITSP, inbound calls work fine, but outbound calls will fail.
    - A Linksys PAP2T located on a VPN will register successfully, but after some indeterminate period of time (measured in hours) ultimately fail to re-register.
    - When successfully registered, outbound calls to the PAP2T will fail, while inbound calls work fine.
    - Oddly, a D-Link ATA (locked to Vonage) works fine.

    Downgrading to 3.0.4-19 cleared up all the problems.

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