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=256217 --- Comment #11 from Christos Chatzaras <chris@cretaforce.gr> --- SSHGuard ( https://www.freshports.org/security/sshguard ) is a tool that checks /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 times using wrong password it blocks their IP using IPFW (or PF). As the remote host 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 have to build a CURRENT userland too. I ask datacenter to connect a KVM to see if monitor shows more information. -- You are receiving this mail because: You are the assignee for the bug.
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