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Thread: Network slowed down by server?

  1. #1
    Join Date
    Feb 2007
    Location
    perdita
    Beans
    1,625
    Distro
    Ubuntu

    Network slowed down by server?

    Hi,

    I set up an http fileserver for a friend of mine and now she's experiencing a network slowdown. The server is on a normal desktop PC connected to the router via cable.

    /var/log/apache2/access.log shows the following:
    Code:
    203.141.11.140 - - [11/Oct/2011:02:16:52 +0100] "GET //mysqladmin/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:16:52 +0100] "GET //typo3/phpmyadmin/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:16:53 +0100] "GET //phpadmin/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:16:53 +0100] "GET //phpMyAdmin/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:16:54 +0100] "GET //phpmyadmin/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:16:55 +0100] "GET //phpmyadmin1/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:16:55 +0100] "GET //phpmyadmin2/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:16:56 +0100] "GET //pma/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:16:56 +0100] "GET //web/phpMyAdmin/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:16:57 +0100] "GET //xampp/phpmyadmin/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:16:58 +0100] "GET //web/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:16:58 +0100] "GET //php-my-admin/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:16:59 +0100] "GET //websql/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:16:59 +0100] "GET //phpmyadmin/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:17:00 +0100] "GET //phpMyAdmin/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:17:01 +0100] "GET //phpMyAdmin-2/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:17:01 +0100] "GET //php-my-admin/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:17:02 +0100] "GET //phpMyAdmin-2.2.3/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:17:02 +0100] "GET //phpMyAdmin-2.2.6/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:17:03 +0100] "GET //phpMyAdmin-2.5.1/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:17:04 +0100] "GET //phpMyAdmin-2.5.4/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:17:04 +0100] "GET //phpMyAdmin-2.5.5-rc1/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:17:05 +0100] "GET //phpMyAdmin-2.5.5-rc2/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:17:06 +0100] "GET //phpMyAdmin-2.5.5/ HTTP/1.1" 401 636 "-" "-"
    203.141.11.140 - - [11/Oct/2011:02:17:06 +0100] "GET //phpMyAdmin-2.5.5-pl1/ HTTP/1.1" 401 636 "-" "-"
    which looks like people searching for vulnerable services.

    The only external services running are standard apache and SSH as far as I know.

    The SSH log showed a lot of attack attempts, so I installed denyhosts now, which should reduce that a bit.

    Is there a way to do something similar for people scanning for services available over apache?
    Or is the network slowdown generally unavoidable?

    edit:
    Ok, easily found answer to my first question...:
    http://serverfault.com/questions/206...-http-requests
    http://www.modsecurity.org/
    http://www.fail2ban.org/wiki/index.php/Main%5FPage
    https://help.ubuntu.com/community/Fail2ban
    http://blog.bodhizazen.net/linux/how...ty-ubuntu-904/

    Just installed fail2ban. Will see how things go.
    Any further suggestions welcome.
    Last edited by KIAaze; October 14th, 2011 at 04:33 PM.

  2. #2
    Join Date
    Aug 2007
    Location
    FL
    Beans
    139
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Network slowed down by server?

    We use fail2ban here and it worths every minute you spend configuring it.

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