Date: Sun, 19 Jan 2025 07:27:10 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 227888] random port selection for daemons causes other daemons to fail Message-ID: <bug-227888-227-yjCmfq5O1z@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-227888-227@https.bugs.freebsd.org/bugzilla/> References: <bug-227888-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D227888 --- Comment #4 from Martin Birgmeier <d8zNeCFG@aon.at> --- Example of ypbind using the imap port, thereby blocking dovecot from starti= ng: [0]# lsof | grep imap ypbind 1457 root 5u IPv4 0xfffff8006d392000 0=20= =20=20=20 TCP *:imaps->*:* (LISTEN) [130]# service ypbind restart Stopping ypbind. Starting ypbind. [0]# service dovecot start Starting dovecot. [0]#=20 The standard services should use their standard ports from /etc/services, m= aybe trying a random port only if that should fail (which it should not, anyway). The randomization for security reasons is outdated, scanning 1022 (or all) ports of a host can be done in a few milliseconds nowadays. And the chances= of choosing some port which is not needed by any other program in a space of o= nly 1022 quickly go to zero the more often (for the various programs) this is needed. -- Martin --=20 You are receiving this mail because: You are the assignee for the bug.=
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