Date: Tue, 28 Mar 2000 11:50:13 -0500 (EST) From: Bob K <melange@yip.org> To: freebsd-stable@FreeBSD.ORG Subject: Re: 4.0-STABLE dhcp conflicts. Message-ID: <Pine.BSF.4.21.0003281147160.72136-100000@localhost> In-Reply-To: <14560.56319.827242.610802@trooper.velocet.net>
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On Tue, 28 Mar 2000, David Gilbert wrote: > >>>>> "Brian" == Brian Kraemer <kraemer@u.washington.edu> writes: > > Brian> in message <14559.40450.544687.51037@trooper.velocet.net>, > Brian> David Gilbert writes: > >> It appears that when I run two (not sure if one does it) tcpdumps > >> on the dhcp server, the dhcp clients don't get any responses to > >> their queries. Is there some flaw in the dhcpd bpf rules? > > Brian> Do you have enough bpf devices enabled? I imagine each tcpdump > Brian> will use one, and dhcpd also uses one if I am not mistaken. > > Well... one not-so-nice "feature" of the dhcpd or bpf interface (don't > know which) is that it requires one bpf per interface. I do believe this was done for security reasons. (ie, if a box with dhcpd is compromised but only has 1 bpf interface, it would require stopping of dhcpd or a recompiled kernel/reboot to run tcpdump, which hopefully would be noticed) Bob <melange@yip.org> "And I had the same fish/pants/jolt/staples/cieling problem you did." - John Teffer To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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