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Thread: problem changing network settings

  1. #1

    Default problem changing network settings

    Hello,

    trying to change settings such as:

    net.ipv4.tcp_max_syn_backlog=2048 by net.ipv4.tcp_max_syn_backlog=256
    net.ipv4.conf.all.accept_redirects=1 by net.ipv4.conf.all.accept_redirects=0

    among others to try to prevent DDoS attacks, after reboot once again have the default values.

    How I can avoid this?

    Thank you.

  2. #2
    Join Date
    Jun 2008
    Location
    Netherlands
    Posts
    24,996

    Default Re: problem changing network settings

    You seem to think that we are very well known to you, your systems and what you are doing. This is not the case. That means that you have to tell us as much as possible and not such a minimal description.

    Which openSUSE level?
    You "try to change settings". That is very vague. Tell us exactly what you change where and how. How can we e.g. tell you you did it in the wrong place when we do not know where you did it?
    Henk van Velden

  3. #3
    Join Date
    Jan 2009
    Location
    Switzerland
    Posts
    1,529

    Default Re: problem changing network settings

    To change values on the fly:

    Code:
    # /sbin/sysctl -w net.ipv4.tcp_max_syn_backlog=256
    and, to make it permanent, edit /etc/sysctl.conf
    Technology is 'stuff that doesn't work yet.' -- Bran Ferren

  4. #4

    Default Re: problem changing network settings

    Quote Originally Posted by vodoo View Post
    to make it permanent, edit /etc/sysctl.conf
    thanks this was what I needed

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