On Wed, 2004-10-06 at 11:40, Kenneth Porter wrote: > All the HOWTO's I've seen online seem to indicate that one puts TOS > manipulation in the PREROUTING mangle table, but it looks like this will > only affect inbound packets. it affects packets prior to any routing decision being made. you can't control how fast packets come into a machine--you can only really control how fast you allow them to leave. that's the essence of traffic shaping. > For outbound packets I'd need to put the rule > in the POSTROUTING table. Should I set TOS in both tables on a gateway and > POSTROUTING on an endpoint? if you're setting TOS on machine A so that a queuing decision can be made by machine B--you can set TOS in POSTROUTING if you want. > My main objective is to set Minimize-Delay on all UDP packets to give them > priority in my traffic shaper. (I'm using Wondershaper from > http://lartc.org/.) This insures that game and VOIP traffic takes > precedence over web and file transfers. if the netfilter box is also the traffic shaper--set TOS in PREROUTING so that that tc filters have the TOS values available to make a decision. -j -- Jason Opperisano <opie@xxxxxxxxxxx>
