ssh brute force

From: Todor Dragnev (todor.dragnev_at_gmail.com)
Date: 07/19/05

  • Next message: Buki: "Re: ssh brute force" 
    Date: Tue, 19 Jul 2005 22:12:52 +0300
To: freebsd-isp@freebsd.org

    Hello,
    This email may be is not for this mailing list, but with this problem
    more and more ISP have troubles. I want to block ssh dictionary attack
    with freebsd. I found nice solution with iptables for linux:

    iptables -A INPUT -p tcp -m state --state ESTABLISHED --tcp-flags FIN,ACK
    FIN,ACK --dport 22 -m recent --name sshattack --set

    iptables -A INPUT -p tcp -m state --state ESTABLISHED --tcp-flags RST RST
    --dport 22 -m recent --name sshattack --set

    iptables -A INPUT -m recent --name sshattack --rcheck --seconds 60
    --hitcount 4 -m limit --limit 4/minute -j LOG --log-prefix 'SSH attack: '

    iptables -A INPUT -m recent --name sshattack --rcheck --seconds 60
    --hitcount 4 -j DROP

    Is it posible to make in this way with ipfw, ipf or pf on freebsd ?

    Regards,
    Todor Dragnev 

    -- 
There are no answers, only cross references
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