I know this is an old thread but I felt I just had to confirm that I have managed this using the methods above (using telnet to write the rules including the ports). I have blocked the steam ports and then put the allow rule below and all the other traffic works. I have children who would rather play games than do their work.
One tip - write the rules in reverse order to the order that you want them. Create the allow order first, then create the gametcp and gameudp afterwards. The last rule that you create appears on top.
My next bit of work is to allow steam traffic to particular machines on the network - if one child does a lot of work, I don't want to exclude them from their games, just because the other child is being particuarly lazy. I'm guessing I would use the
Destination Address: __addr_local
for this and then point that to the internal ip address? Anyone done this yet?
for this?
