Date: Fri, 17 Feb 2006 09:39:41 +0100 From: Marian Hettwer <MH@kernel32.de> To: Atanas <atanas@asd.aplus.net> Cc: yar@freebsd.org, freebsd-stable@freebsd.org, Lowell Gilbert <freebsd-stable-local@be-well.ilk.org>, David Malone <dwmalone@maths.tcd.ie>, Rostislav Krasny <rosti.bsd@gmail.com>, =?ISO-8859-15?Q?Dag-Erling_Sm=F8rgrav?= <des@des.no>, "Michael A. Koerber" <mak@ll.mit.edu> Subject: Re: SSH login takes very long time...sometimes Message-ID: <43F58BCD.1070202@kernel32.de> In-Reply-To: <43F4E3B0.1090806@asd.aplus.net> References: <59e2ee810512250841t75157e62rec9dc389ac716534@mail.gmail.com> <20051227101621.GA16276@walton.maths.tcd.ie> <86irrfoix5.fsf@xps.des.no> <43F4E3B0.1090806@asd.aplus.net>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hej there, Atanas wrote: > Dag-Erling Smørgrav said the following on 02/15/06 23:35: > >> David Malone <dwmalone@maths.tcd.ie> writes: > Last year I already had to decrease the LoginGraceTime from 120 to 30 > seconds on my production boxes, but it didn't help much, so on top of > that I got to implement (reinvent the wheel again) a script tailing the > auth.log and firewalling bad gyus in order to secure sshd and let my > legitimate users in. > You could get rid of parsing auth.log and everything and just use pf(4) instead. Look at that: # sshspammer table table <sshspammer> persist block log quick from <sshspammer> # sshspammer # more than 6 ssh attempts in 15 seconds will be blocked ;) pass in quick on $ext_if proto tcp to ($ext_if) port ssh $tcp_flags (max-src-con n 10, max-src-conn-rate 6/15, overload <sshspammer> flush global) > I really miss the inetd features. A setting like "nowait/100/20/5" > (/max-child[/max-connections-per-ip-per-minute[/max-child-per-ip]]) > would effectively bounce the bad guys, but AFAIK (correct me if I'm > wrong), ssh is no longer supposed to work via inetd and still has no > such capabilities. > I believe what you are searching for is indeed the pf(4) stuff mentioned above :) > I'd be nice to have something like for instance the sendmail's client > and rate connection limits, but I guess this is not the right place to ask. > I believe it is. It's about FreeBSD and about Security ;-) regards, Marian -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (Darwin) iD8DBQFD9YvKgAq87Uq5FMsRAik2AKDMXXj4K0Pb9i0Qc6Cqowtzp6dynwCeIOpn gwk9aMT1skGMWis8tRL1Xtk= =jV8k -----END PGP SIGNATURE-----
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