Thanks a lot for interesting link !
I have to admit that my 3 Nic SME 7.2 actually works rock stable and perfectly well, without a problem, like that the SME server use to do.
Actually I do not use the 3'rd nic so much. The more usefull part of my new firewall is the port redirect function that gives me remote control, ssh tunneling, file transfere, ip telephony, etc from rather restricted hot spots and wlans. Actually this rather usefull function could be rather easy implemented into the existing template based firewall. (Putty and WinSCP against sshd on port tcp 443, for remote control, file transfer and tunneling, and Asterisk for ip telephony at UDP port 53.)
I have had one single issue with my new firewall arrangement. In the old days it used to be a problem to do some web based uploads, and it was neccessary to releaf some security function. I think that normally this is not a problem with the SME 7.2, but after rearanging the firewall, the only noticed side effect is that this restriction has apeared to returned back. (But as WinSCP can be used instead this is not a big issue.)
By the way - even though it works quite well using a wired 3 NIC soultion, it did not work wery well when installing the wireless NIC directly into the hardware. I think it is a more practical solution to set up the third safe sone using 3 wired NIC's and then apply a wireless access point connected to the 3'rd NIC. (So that all problems related to packet encryption, radio frequences etc will then be left to the wireless access point box.)