Date: Wed, 09 Aug 2017 05:20:38 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-net@FreeBSD.org Subject: [Bug 217637] One TCP connection accepted TWO times Message-ID: <bug-217637-2472-R2T4d02D35@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-217637-2472@https.bugs.freebsd.org/bugzilla/> References: <bug-217637-2472@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D217637 --- Comment #91 from Richard Russo <freebsd@ruka.org> --- For us, this may have limited effect, because our icmplim is much higher th= an the default (16k), because we do want to send closed port RSTs in high volumewhen our service ports are closed. This patch should keep our system available, but we'd still be sending out a rather large number of acks on t= hese broken connections. Given that r317208 means we only see this condition when the syncache overflows, this may be a reasonable trade off. I have been thinking that it might be useful if these acks (or other unexpe= cted packets) would actually push the connection into one of the existing state recovery behaviors, such as immediately triggering a keepalive sequence if = one wasn't already ongoing. That's certainly a larger change though. I'll get this patch up somewhere and let you know how it goes. --=20 You are receiving this mail because: You are on the CC list for the bug.=
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