Half-bridge mode fills up ARP table (solution)

Discussion in 'Tomato Firmware' started by trezno, Dec 19, 2008.

  1. trezno

    trezno LI Guru Member

    I have a Zyxel P660R-D1, running PPPoA in half-bridge mode, connected to a WRT54GL running tomato firmware.
    My initial problem was that the NAT function in my zyxel was very bad, the iptable was being filled up, and not cleared until 3 days later. To get rid of the double NAS setup, and take use of the NAT functionality in the WRT54GL, I set the Zyxel to run in half-bridge mode, and now the WRT54GL has my public ip. So far so good.

    Now the ARP table gets filled up quickly, because each new connection is apparently getting a mac-address.

    Luckily mstombs had the answer! It is now working perfectly!

    The solution was simply to add these commands in the firewall script:

  2. SJG1

    SJG1 Addicted to LI Member


    Excellent, thanks for that information trezno.
    I have exactly the same modem/router running half bridge connected to my WHR-HP-G54, I too have noticed the connections table full of strange MAC addresses coming from the Zyxel for each and every connection.

    I will give this solution a try later.

    Thanks again.

  3. mstombs

    mstombs Network Guru Member

  4. SJG1

    SJG1 Addicted to LI Member

    Just tested the above solution, and can confirm it works for me too.

    Have been looking for a solution for this for a while now.
    Thanks again mstombs/trezno :)
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