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My Tomato router behind 2Wire modem is dropping DHCP traffic

Discussion in 'Tomato Firmware' started by PSL, Mar 29, 2012.

  1. PSL

    PSL Serious Server Member

    To start, here is my setup:
    • I have a 2Wire modem/router combo provided by my ISP which I essentially just use as a modem.
    • I have a WRT54G with Tomato v. 1.28 sitting behind the 2Wire modem.
    • I have configured the 2wire modem to operate in "DMZplus mode", forwarding all ports to my WRT54G Tomato router.
    • The "DMZplus mode" of the 2wire modem assigns its own WAN IP address to the Tomato router via DHCP. The lease time is 10 minutes.
    The logs in my Tomato router show what looks like DHCP traffic being blocked by the firewall. This is occurring exactly every 5 minutes. I'm assuming that this has something to do with the Tomato router trying to renew it's lease. As far as I can tell, the lease is being successfully renewed, but why are these packets being dropped?

    I am including a sampling from the Tomato logs giving an example of what I am seeing. Any help making sense of this would be greatly appreciated.

    Code:
    Mar 27 19:00:01 tomato syslog.info root: -- MARK --
    Mar 27 19:02:56 tomato user.warn kernel: DROP IN=vlan1 OUT= MAC=00:13:10:e9:8f:eb:64:0f:28:65:ec:89:08:00:45:00:01:4d SRC=59.132.122.110 DST=59.132.122.109 LEN=333 TOS=0x00 PREC=0x00 TTL=255 ID=31365 DF PROTO=UDP SPT=67 DPT=68 LEN=313
    Mar 27 19:07:56 tomato user.warn kernel: DROP IN=vlan1 OUT= MAC=00:13:10:e9:8f:eb:64:0f:28:65:ec:89:08:00:45:00:01:4d SRC=59.132.122.110 DST=59.132.122.109 LEN=333 TOS=0x00 PREC=0x00 TTL=255 ID=57253 DF PROTO=UDP SPT=67 DPT=68 LEN=313
    Mar 27 19:12:56 tomato user.warn kernel: DROP IN=vlan1 OUT= MAC=00:13:10:e9:8f:eb:64:0f:28:65:ec:89:08:00:45:00:01:4d SRC=59.132.122.110 DST=59.132.122.109 LEN=333 TOS=0x00 PREC=0x00 TTL=255 ID=61505 DF PROTO=UDP SPT=67 DPT=68 LEN=313
    Mar 27 19:17:56 tomato user.warn kernel: DROP IN=vlan1 OUT= MAC=00:13:10:e9:8f:eb:64:0f:28:65:ec:89:08:00:45:00:01:4d SRC=59.132.122.110 DST=59.132.122.109 LEN=333 TOS=0x00 PREC=0x00 TTL=255 ID=4421 DF PROTO=UDP SPT=67 DPT=68 LEN=313
    Mar 27 19:22:57 tomato user.warn kernel: DROP IN=vlan1 OUT= MAC=00:13:10:e9:8f:eb:64:0f:28:65:ec:89:08:00:45:00:01:4d SRC=59.132.122.110 DST=59.132.122.109 LEN=333 TOS=0x00 PREC=0x00 TTL=255 ID=46865 DF PROTO=UDP SPT=67 DPT=68 LEN=313
    Mar 27 19:27:57 tomato user.warn kernel: DROP IN=vlan1 OUT= MAC=00:13:10:e9:8f:eb:64:0f:28:65:ec:89:08:00:45:00:01:4d SRC=59.132.122.110 DST=59.132.122.109 LEN=333 TOS=0x00 PREC=0x00 TTL=255 ID=48709 DF PROTO=UDP SPT=67 DPT=68 LEN=313
    
     

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