Date: Sat, 29 May 2021 13:09:37 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 256217] [tcp] High system load because of interrupts with RACK Message-ID: <bug-256217-7501-CNUH1O6dxG@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-256217-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-256217-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D256217 --- Comment #11 from Christos Chatzaras <chris@cretaforce.gr> --- SSHGuard ( https://www.freshports.org/security/sshguard ) is a tool that ch= ecks /var/log/auth.log , /var/log/maillog, etc and blocks IPs that try to brute force passwords. When someone tries to login for example to SSH multiple ti= mes using wrong password it blocks their IP using IPFW (or PF). As the remote h= ost is not "reachable" any more we can't receive any packets from it which I believe makes the connection to stuck in LAST_ACK state. I tried to use a CURRENT kernel with 13.0 userland, I connect successfully using SSH, but after I run the "wrk benchmark" the server hang. Maybe I hav= e to build a CURRENT userland too. I ask datacenter to connect a KVM to see if monitor shows more information. --=20 You are receiving this mail because: You are the assignee for the bug.=
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