Most of these el-cheapo routers will quite happily forward UDP and TCP but don't have any rules to forward a protocol. Sometimes the DMZ works, other times it doesn't. I've seen many people report this on the IPv6 tunnel broker forums where they are trying to forward Protocol 41 and the host is behind a NAT.
I'd suggest he gets something that supports DD-WRT. I've just seen John Wiseman's post from earlier today that he has this working on VM - it just needs a couple of firewall rules adding to DD-WRT which has to be done over a telnet connection. Unfortunately they won't persist between reboots so it may need a script to automate it.
Something like:
iptables -t nat -A PREROUTING -i eth1 -p 4 -j DNAT --to 192.168.1.2 iptables -t filter -A FORWARD -i eth1 -p 4 -d 10.0.1.2 -j ACCEPT
the check your firewall rules with iptables -t nat -L; iptables -t filter -L
Assuming eth1 is your public ip interface and 192.168.1.2 is the ip address of your host running rip44d, this would forward any incoming protocol 4 packets to 10.0.1.2.
HTH, Nick.
On 08/01/2014 21:48, ve1jot wrote:
He tells me it's a Newlink 54M Model ROU5 - I cannot seem to find much information on the net about it...
On 14-01-08 05:09 PM, Nick G4IRX wrote:
(Please trim inclusions from previous messages) _______________________________________________ Which modem is he using? VM used to supply a cable modem and a DIR615 (which could be flashed with DD-WRT) but now they supply a combined Netgear modem/router. AAUI, this can be configured as a modem for use with the customer's own router.