On Friday 31 August 2007 15:10:15 Norberto Meijome wrote: > On Fri, 31 Aug 2007 13:33:53 +0200 > > Daniel Hartmeier <[EMAIL PROTECTED]> wrote: > > On Fri, Aug 31, 2007 at 08:27:29PM +1000, Norberto Meijome wrote: > > > rdr on $int_if proto tcp from 172.16.82.81 to any -> 127.0.0.1 port > > > 10101 netsed tcp 10101 0 0 s/FOO/BAR > > > > > > The traffic from XP gets redirected just fine to netsed, which replaces > > > the bytes just fine. BUT the changed packets (the output of netsed) get > > > reinjected somewhere so that the rdr hits them again, sending them back > > > to netsed ad infinitum. ( yes, i managed to hit a load of 700+ without > > > anything ever leaving BSD ...quite cool) > > > > I'm pretty sure the endless loop you describe does not pass through pf, > > except for the first iteration. In the first iteration, pf replaces the > > destination address with 127.0.0.1, and the packet goes to netsed. > > netsed changes the payload, but leaves the destination address > > (127.0.0.1 now). It sends the packet out, and since the destination > > address is 127.0.0.1, it sends it to itself. Hence the loop, which does > > not involve pf any further (i.e. there's no 'redirecting again' or such, > > AFAICT). > > I was just reaching the same conclusion after some strong coffee > > netsed's output is (part ) : > --- > Script started on Fri Aug 31 07:52:12 2007 > [EMAIL PROTECTED] /usr/home/luser]# netsed tcp 10101 0 0 s/FOO/BAR > netsed 0.01b by Michal Zalewski <[EMAIL PROTECTED]> > [*] Parsing rule s/FOO/BAR ... > [+] Loaded 1 rules... > [+] Listening on port 10101/tcp. > [+] Using dynamic (transparent proxy) forwarding. > > [+] Got incoming connection from 172.16.82.81:1178 to 127.0.0.1:10101 > [*] Forwarding connection to 127.0.0.1:10101 > [+] Got incoming connection from 127.0.0.1:51337 to 127.0.0.1:10101 > [*] Forwarding connection to 127.0.0.1:10101 > [+] Caught client -> server packet.
I think you need to figure out what this 'transparent proxy mode' of netsed does, cause it should under no circumstances forward to itself... -- Mel _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"