WAN3 routing is intermittent (going through NAT'd pppoe DSL)



  • I have a box configured with WAN3 that routes correctly for hours and sometimes minutes, and sometimes not at all. I've banged my head against it intermittently over the past few days, and searched this forum, but I need some clues on how to troubleshoot this further.

    Background: Its a 5 ethernet port box that started as 2 WAN (both static DSL) and two LAN subnets - essentially configured as WAN-LAN and WAN2-LAN2. No load balancing or failover - in general, no real magic.

    But now I've added WAN3 in the form of a cheesy Verizon dynamic PPPoE DSL line. It won't do 'transparent PPPoE bridging', so out of frustration I just let it NAT and hoped the double NAT doesn't get in the way. (FYI, I do have a 'pppoe bridge mode' capable modem coming that should make WAN3 work as a public DHCP IP, but that's days away at best).

    I set up outbound NAT to WAN3. I set up a LAN rule to route all traffic to WAN3 (left LAN2 alone) and … it works. Sometimes for hours, sometimes for minutes. But then it stops working and I can't work out why. From blips on the traffic graph it seems that requests are still being made, but no response gets back to the LAN.  If I disable the rule and enable, it sometimes works again, and sometimes not.

    Obviously there is something flakey, and perhaps it has to do with the extra NAT layer in the DSL modem, but I'm intrigued that it sometimes works for hours with no problems.  And we desperately need the extra bandwdith so I keep banging my head against it. (Of course plugging into the modem directly works just fine).

    Any ideas?  Or any thoughts on where to start troubleshooting?

    thx, michael



  • But now I've added WAN3 in the form of a cheesy Verizon dynamic PPPoE DSL line. It won't do 'transparent PPPoE bridging', so out of frustration I just let it NAT and hoped the double NAT doesn't get in the way. (FYI, I do have a 'pppoe bridge mode' capable modem coming that should make WAN3 work as a public DHCP IP, but that's days away at best).

    I use the DMZ function on my modem with out any problems.

    The way i would start troubleshooting is to make sure it has nothing to do with current setup.
    boot from livecd.
    assign nics, change the gateway on default lan rule to wan3 and nothing else at all.

    http://forum.pfsense.org/index.php/topic,7001.0.html


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