I'm actually using an OpenWrt router - perhaps there is a way to turn off or simplify the NAT so that it does not change port numbers?
Mike On Thu, Apr 3, 2014 at 9:44 AM, Fred Klassen <[email protected]> wrote: > If it was a router without NAT you could make this work provided that > your hardware was identical to IP addresses/MAC addresses in the pcap file. > If not, you will have to use tcprewrite/tcpprep to make it so. > > With NAT there is an extra complication. When a connection is > established, NAT will translate the source port number. The algorithm is > different from one NAT to the next. What is difficult is if the translated > source port is completely random with no relation to the original source > port. Luckily those NATs are going by the wayside because they break TURN > servers, and thereby break direct peer-to-peer VoIP calls (VoIP proxy > required). > > Provided the capture was done on the same NAT with the same source port > translation algorithm, and the same care is taken to ensure that the > addresses match the hardware, and the NAT supports TURN, you should be OK. > > Fred. > > From: Mike A <[email protected]> > Reply-To: Main forum for tcpreplay <[email protected]> > Date: Wednesday, April 2, 2014 at 7:11 PM > To: "[email protected]" < > [email protected]> > Subject: [Tcpreplay-users] Passing Traffic Through a Router using one > Linux machine? > > Hi, > > I'm running tcpreplay 4.0.4 on Ubuntu Linux 12. I've read the usage > examples (http://tcpreplay.synfin.net/wiki/usage) and followed along. > I'm trying to replay a single-stream (one 5-tuple) pcap so that packets go > through a router. > > My hardware setup is involves one Linux machine (with eth0 and eth1) and > one router (which does NAT): > > eth0 <-> LAN (router) WAN <-> eth1 > 192.168.0.1 <-> 192.168.0.2 (router) 10.0.0.2 <-> 10.0.0.1 > > * Will this physical setup work? Or are there common pitfalls or > mistakes? > * For packets that have src IP 192.168.0.1 and dst IP 10.0.0.1 (both on > the linux machine), will the Linux OS short-circuit and simply pass packets > internally (and not actually send it out to the router?)? > > > If I can get tcpreplay to actually send packets from a pcap through a > router I will donate $ to whoever or whatever, because this will be the > most useful tool. It's something I have needed for such a long time, and > will get used a lot. > > Thanks ahead for any help, > Mike > > > ------------------------------------------------------------------------------ > > _______________________________________________ > Tcpreplay-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/tcpreplay-users > Support Information: http://tcpreplay.synfin.net/trac/wiki/Support >
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