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First aid for DDOS attack on port 80

Discussion in 'General Discussion' started by sibinkc, Jun 3, 2007.

  1. blackmetal

    blackmetal Registered

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    how can i unban?

    Hello,
    i use iptables for ban ip.
    now i want unban one of that ip i ban it.
    how can i do this action?
    special thanks
    waiting for response.
    bye
     
  2. chopperb

    chopperb Active Member

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  3. blackmetal

    blackmetal Registered

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    how can i configure it?

    Hello,
    i install it in my serevr.
    can anybody explain how can i configure it until it against ddos attack?
    special thanks
    bye
     
  4. davidanand

    davidanand Member

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    Hi

    Please add this it will help you

    edit /etc/sysctl.conf that may improve network performance

    net.ipv4.tcp_window_scaling = 1
    net.ipv4.tcp_syncookies = 1
    net.core.rmem_max = 16777216
    net.core.wmem_max = 16777216
    net.ipv4.tcp_rmem = 4096 87380 16777216
    net.ipv4.tcp_wmem = 4096 65536 16777216

    The above isn’t to replace what may already exist in /etc/sysctl.conf.
    run this after editing to refresh the sysctl

    sysctl -p /etc/sysctl.conf
     
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  5. Solokron

    Solokron Well-Known Member

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    This is interesting. Where did you come about these settings?

     
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