Date: Sat, 12 Apr 2008 11:53:00 +0100 From: "Alireza Torabi" <alireza.torabi@gmail.com> To: "Eugene Grosbein" <eugen@kuzbass.ru> Cc: net@freebsd.org Subject: Re: bpf does not see packets forwarded with ipfw fwd Message-ID: <cffd8c580804120353h2d2eb0c0o38e7c264a73fb9a4@mail.gmail.com> In-Reply-To: <20080412062251.GA2199@svzserv.kemerovo.su> References: <20080412062251.GA2199@svzserv.kemerovo.su>
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Is BIOCFEEDBACK set? On Sat, Apr 12, 2008 at 7:22 AM, Eugene Grosbein <eugen@kuzbass.ru> wrote: > Hi! > > One of 7.0 users has reported in some cyrillic newsgroup > a problem that I have reproduced in my 7.0-STABLE system. > That is: tcpdump does not show locally originated outgoing IP packets > that were processed by 'ipfw fwd' rule. The same configuration presents > no problems with 6.3-STABLE. > > Consider simple schema: two FreeBSD boxes (A and B) directly connected > with ethernet intefaces. The box A has another ethernet interface and uses > "ipfw fwd" as its very first ipfw rule to forward some packets to B, > while these packets would normally go out trough mentioned another > interface. Now, tcpdump does NOT show outgoing packets but host B also > runs tcpdump on its incoming interface and does see them. > > I double-checked all paramerets for tcpdump, all routing tables. > I even connected A and B with cross-over ethernet cable, without a switch. > Still, B sees incoming packets coming over the cable and A does not see > them leaving. This bothers me a bit :-) > > Eugene Grosbein > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >
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