* Philipp Snizek <mailinglists@belfin.ch> [010524 12:55]:
only block 53/tcp.
This is what I have now ( I am using DNS caching server only maybe I am doing this wrong) ipchains -A input -p tcp -s $REMOTENET -d $OUTERNET 53 -j ACCEPT ipchains -A input -p udp -s $REMOTENET -d $OUTERNET 53 -j ACCEPT and you are suggesting ipchains -A input -p tcp -s $REMOTENET -d $OUTERNET 53 -j REJECT
open 1024:5000 for client requests and receiving answers. These are usually the most used ports for communication from client to servers to client if you use masquerading on your linux box. Since you've got a dial up "router" you do use masquerading.
This part I did not get the picture I have an ADSL connection (so its pppoe) Is this what you mean ipchains -A input -p tcp -s $REMOTENET -d $OUTERNET 1024:5000 -j ACCEPT ipchains -A input -p udp -s $REMOTENET -d $OUTERNET 1024:5000 -j ACCEPT
But if you like I can give you some real reasons for being afraid :-))
I would appreciate being asigned for reading homework guidance -- Togan Muftuoglu