RE: SYN attacks (correction)

From: Mark Picone (wts666_at_iprimus.com.au)
Date: 04/07/04

  • Next message: David: "Re: SYN attacks (correction)"
    To: <freebsd-security@freebsd.org>
    Date: Wed, 7 Apr 2004 11:29:51 +1000
    
    

    you should add
    net.inet.tcp.drop_synfin=1 to /etc/sysctl.conf so it gets piped into sysctl
    on boot
    or just run sysctl net.inet.tcp.drop_synfin=1 as root

    -----Original Message-----
    From: owner-freebsd-security@freebsd.org
    [mailto:owner-freebsd-security@freebsd.org] On Behalf Of Mark Picone
    Sent: Wednesday, 7 April 2004 10:57 am
    To: freebsd-security@freebsd.org
    Subject: RE: SYN attacks

    You could try adding this to /etc/sysctl.conf

    sysctl net.inet.tcp.drop_synfin=1

    -----Original Message-----
    From: owner-freebsd-security@freebsd.org
    [mailto:owner-freebsd-security@freebsd.org] On Behalf Of Spades
    Sent: Wednesday, 7 April 2004 3:02 am
    To: freebsd-questions@freebsd.org
    Cc: freebsd-security@freebsd.org
    Subject: SYN attacks

    Heya,

    FREEBSD 4.9-STABLE

    Is there anyway to block SYN attacks and prevent it from bring down my
    server?

    Its been attacking for sometime.
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