Lynwood,
Please tell me more about your version of DD-WRT.
I have: Firmware: DD-WRT v24-sp2 (08/07/10) std, and it does not pass
IPIP rip packets, unless I enable DMZ.
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It's noted that IPIP does not traverse firewalls, that is not the
case with me, as I am traversing two firewalls to reach my Gateway
server, both devices using using DD-WRT, and it appears to broadcast any
packet that is not UDP or TCP. ......