Ville Walveranta wrote:
> That's a good point... except that in this case, without the masq entry:

> $LAN2_IF   172.16.0.0/24   10.0.0.253

> .. routing doesn't work. Traceroute won't proceed beyond the shorewall box 
> from LAN1 servers without it.

Time to break out a packet sniffer (I tend to use tshark) and follow the 
packets. Do the packets get through your Shorewall box ? Do they go out the 
right interface ? Do they get past any filters and make it to the wire ?

Does the remote machine actually respond ? Where does it send it's packets ? Do 
they reach your Shorewall box ? (Does the pfsense machine need some rules as 
well as a route adding ?) Does your Shorewall box bring them back to your own 
network ? Do they make it out onto the wire ?

If in doubt, sit down with a piece of paper, draw your network, and draw the 
route packets will (or should) take for the round trip. Then use a packet 
sniffer and follow that route - at some point you should find where the packets 
stop (or are headed the wrong way) and then you know where to look for the 
problem.

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