OrbMT and pfSense

[senser]

I am failing to read my line status from my DSL modem. The method to access a modem behind pfSense, as described in the docs (outbound NAT), does not work for this modem (it worked great with my old modem though).

This is my setup:
vr0 + ath0 >> bridge0 ("LAN", from here I want to read the modem)
vr1  ("LAN2", here lives the modem, and I can ping it from pfSense)

This is how people using OpenWRT routers get it to work through their router:

iptables -I POSTROUTING -t nat -o vlan1 -d 169.254.1.0/8 -j MASQUERADE
ip addr add 169.254.1.7/8 dev vlan1 brd +
echo 1 >/proc/sys/net/ipv4/conf/br0/proxy_arp
echo 1 >/proc/sys/net/ipv4/conf/vlan1/proxy_arp

I have tried to translate those settings to pfSense - without much success so far.

The first line is a simple outbound NAT rule, using a VLAN (is using a VLAN important?).
The second line seems to add some address to the VLAN (probably, and what't the "brd +" part?).
There seems to be a freeBSD equivalent for the sysctl parts (net.link.ether.inet.proxyall) and I have enabled it (it is disabled by default).

The tool works when I connect the modem to my PC directly, so there is no issue with Windows or Windows firewall, the tool itself or it's setup.

Any help would be appreciated! I don't like sitting in the dark about my DSL sync… :)

Tool used to read the modem: OrbMT ( http://blog.orbmu2k.de/tools/orbmt-modem-tool-sidebar-gadget )