I know this is perlmonks and all, but have you looked the the tcprewrite app in the tcpreplay suite? I have used it to do exactly what you ask many times with great results. http://tcpreplay.synfin.net/trac/ http://tcpreplay.synfin.net/trac/wiki/tcprewrite#RewritingLayer2

In reply to Re: Modification of packet content over a trace by Anonymous Monk
in thread Modification of packet content over a trace by Anonymous Monk

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