Date: Thu, 31 May 2001 21:14:53 +0200 From: "Karsten W. Rohrbach" <karsten@rohrbach.de> To: Rob Simmons <rsimmons@wlcg.com> Cc: Liran Dahan <lirandb@netvision.net.il>, freebsd-security@FreeBSD.ORG Subject: Re: Limiting TCP RST Response Packets Message-ID: <20010531211453.B69543@mail.webmonster.de> In-Reply-To: <Pine.BSF.4.21.0105311441450.4425-100000@mail.wlcg.com>; from rsimmons@wlcg.com on Thu, May 31, 2001 at 02:46:09PM -0400 References: <000a01c0ea06$be934600$b88f39d5@a> <Pine.BSF.4.21.0105311441450.4425-100000@mail.wlcg.com>
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[-- Attachment #1 --] blackhole makes more sense i think. see blackhole(4) rohrbach@WM:datasink[~]19% cat /etc/sysctl.conf net.inet.tcp.blackhole=2 net.inet.udp.blackhole=1 /k Rob Simmons(rsimmons@wlcg.com)@2001.05.31 14:46:09 +0000: > You will need to add the following line to your kernel config file, and > recompile the kernel: > > options TCP_RESTRICT_RST > > You should also read the comments about this option in the LINT file. > > Then you will need to add this line to your rc.conf file: > > tcp_restrict_rst="YES" > > or you can use the sysctl knob: > > net.inet.tcp.restrict_rst > > Robert Simmons > Systems Administrator > http://www.wlcg.com/ > > On Thu, 31 May 2001, Liran Dahan wrote: > > > Im afarid of someone trying to flood me by Connecting to me 1000 times > > and for every time like that it will send TCP Rst Reponse. Is there > > any way to Limit TCP Rst Response packets? Is there a way to Limit > > Unreach Messages (IPFW) that it wont flood me too ? > > > > -Liran Dahan- (lirandb@netvision.net.il) > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-security" in the body of the message -- > yes, i'm writing all lowercase. that's a fact. KR433/KR11-RIPE -- WebMonster Community Founder -- nGENn GmbH Senior Techie http://www.webmonster.de/ -- ftp://ftp.webmonster.de/ -- http://www.ngenn.net/ karsten&rohrbach.de -- alpha&ngenn.net -- alpha&scene.org -- catch@spam.de GnuPG 0x2964BF46 2001-03-15 42F9 9FFF 50D4 2F38 DBEE DF22 3340 4F4E 2964 BF46 [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (FreeBSD) Comment: For info see http://www.gnupg.org iD8DBQE7FpgtM0BPTilkv0YRAuNbAKC80HYLjuWQozgvj91jOULxiOeuCACgvq6e Gp4/njIwA1oI4M6+L9Hdn8w= =LTYA -----END PGP SIGNATURE-----
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