Date: Sun, 7 May 2023 00:01:21 +0200 From: Yuri <yuri@aetern.org> To: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: blackhole defaults Message-ID: <0bee752e-0e01-1e51-e411-2995a3d6a318@aetern.org> In-Reply-To: <080af465-82c9-6347-473d-0235d6982278@dreamchaser.org> References: <080af465-82c9-6347-473d-0235d6982278@dreamchaser.org>
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Gary Aitken wrote: > I don't think I've specifically set any of these: > > $ sysctl net.inet | grep blackhole > net.inet.tcp.v6pmtud_blackhole_mss: 1220 > net.inet.tcp.pmtud_blackhole_mss: 1200 > net.inet.tcp.pmtud_blackhole_detection: 0 > net.inet.tcp.blackhole: 2 > net.inet.udp.blackhole: 1 > net.inet.sctp.blackhole: 0 > > Can someone explain to me the logic behind the last 3 (tcp,udp,sctp) > defaults, and why they aren't all at 2? blackhole(4) says it's disabled by default, and indeed all 3 are 0 on my system, so something might have set it for you after all? $ sysctl net.inet.tcp.blackhole net.inet.udp.blackhole net.inet.sctp.blackhole net.inet.tcp.blackhole: 0 net.inet.udp.blackhole: 0 net.inet.sctp.blackhole: 0
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