Greetings to everyone! Hope you can help me with a question. :) I'm implementing a traffic control (shaping) scheme on my job, based on the TOS value of the IP packet, and next on Different Services configured on the router (by the TOS marking). At the moment, the scheme works this way: 1) The browser requests access to a site, using a proxy server; 2) The proxy server identifies the user, and mark the TOS field of the outgoing packet with an specific value (for an example, 0x1c); 3) Looking the tcpdump records for this traffic (on the proxy server), the packet is receiving the mark normally. But when we try to see the traffic "mirrored", for the exit communication links (Internet Links), the packets lose their marking, turning to 0x00 (normal). As the traffic goes normally (just the marks disappear), i see that the packets are not being dropped or rejected. I think that in any way the packets are marked again as normal on the firewall, but i can't confirm that. I got two questions: 1) Does the firewall (IPTables) remove any marking done by the proxy server? 2) If this really happens, is there any way to mark the packets again, before they go to the router? Any help would be very appreciated. Thanks in advance! André _______________________________________________________ Yahoo! doce lar. Faça do Yahoo! sua homepage. http://br.yahoo.com/homepageset.html
