Messages: ip_nat_mangle_udp_packet: undersized packet

Discussion in 'DD-WRT Firmware' started by will792, Sep 17, 2005.

  1. will792

    will792 Network Guru Member

    I get strange messages in the router log since I started using VOIP ATA (Sipura 3000). The message text is below:

    <4> kernel: ip_nat_mangle_udp_packet: undersized packet
    <4> kernel: ip_nat_mangle_udp_packet: undersized packet
    <4> kernel: NET: 1 messages suppressed.

    Firmware is DD-WRT v.22r2 running on WRT54G v.2.0. The VOIP provider is FreeWorldDialup. I know that Sipura refreshes a connection (registration) to VOIP provider every 30 seconds but the messages are logged every few seconds.

    Any ideas what they mean?


  2. zomo

    zomo Network Guru Member

    I've got the same message using a Linksys PAP2-NA using dd-wrt v22-r2, it happens every few seconds.

    I googled for the string to know what it means, but I didn't understand anything, nor if I can change anything in the PAP2 to avoid these messages.
  3. will792

    will792 Network Guru Member

    There is a some bug in ip_nat_mangle_udp_packet module. The good news is that it does not affect VOIP service, except messages in the log.

    There was a posting indicating type of IP packets creating this message/error but I doubt anyone had a chance to fix it. Hopefully it would be fixed in v.23 .

    I also noticed that UDP traffic (SIP and RTP) from my Sipura ATA is not logged by the router. It sees only HTTP/HTTPS traffic which is configuration/provisioning from VOIP provider.
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