Hi! I am answering my own question. Using: iptables -t mangle -A OUTPUT -o $IFACE -p UDP --dport 7001 -j TOS --set-tos 0x10 can be viewed using: iptables -t mangle -L This will also show POSTROUTING AND PREROUTING chains. If a iptable command is not properly written it will answere: No chain/target/match by that name, so do it as it shall be done. :) Thanks all for your support. I am still a newbie. :) -Johan- On Sat, 27 Dec 2003, Johan Cimen wrote: > Hi! > > I am an iptables newbie and this is what I want do do with iptables: > 1. I want to ulog incomming packets at PREROUTING, incomming at specific > ports with UDP protocol. > 2. I am going to generate UDP packets from my local station, from specific > ports. > 3. I want to set TOS and TTL fields of my packets matching specific ports > at OUTPORT or POSTROUTING. > > Problem that I have is: > 1. I cannot use: > iptables -t mangle -A OUTPUT -o $IFACE -p UDP --dport 7001 -j TOS > --set-tos 0x10 > Using iptables -L shows nothing under OUTPUT headline. > I cannot use tables at all. > 2. I cannot use (just an example, nothing to do with what i want to do): > iptables -A POSTROUTING -o $IFACE -p UDP --dport 7001 > iptables says: No chain/target/match by that name > Above iptable command works for INPUT, FORWARD and OUTPUT chains. > > Question is: > 1. Have I missed something in my kernel configurations? > 2. Have I missed something in building chains and targets? > 3. I need help! > > -Johan-
