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Thread: unstable behavior of amule

  1. #1

    Default unstable behavior of amule

    hello

    took a few days observing the amule unstable behavior, sometimes it closes and many other uses around 3 gb ram making pc slow.

    Amule 2.2.6 using the packman repo and opensuse 11.4.

    Never had this problem.

    Thanks.

  2. #2

    Default Re: unstable behavior of amule

    I have reinstalled amule and is still closing occasionally.

    Log var/log/messages appears:

    Code:
    May 25 20:10:01 pc-jonatan kernel: [ 4224.178237] TCP: Possible SYN flooding on port XXXX. Sending cookies.
    May 25 20:10:16 pc-jonatan kernel: [ 4239.132182] amule[3154]: segfault at 7f9de806c030 ip 00007f9df1022c25 sp 00007f9de89c7998 error 4 in libglib-2.0.so.0.2800.0[7f9df0fe0000+f0000]
    May 25 20:59:59 pc-jonatan rsyslogd: -- MARK --
    May 25 21:59:59 pc-jonatan rsyslogd: -- MARK --
    May 25 22:24:00 pc-jonatan kernel: [12263.863102] TCP: Possible SYN flooding on port XXXX. Sending cookies.
    May 25 22:24:01 pc-jonatan kernel: [12264.437860] TCP: Possible SYN flooding on port XXXX. Sending cookies.
    May 25 22:24:01 pc-jonatan kernel: [12264.965317] TCP: Possible SYN flooding on port XXXX. Sending cookies.
    May 25 22:24:02 pc-jonatan kernel: [12265.158136] TCP: Possible SYN flooding on port XXXX. Sending cookies.
    May 25 22:24:02 pc-jonatan kernel: [12265.686145] TCP: Possible SYN flooding on port XXXX. Sending cookies.
    May 25 22:24:03 pc-jonatan kernel: [12266.359601] TCP: Possible SYN flooding on port XXXX. Sending cookies.

  3. #3
    Join Date
    Feb 2009
    Location
    Spain
    Posts
    25,547

    Default Re: unstable behavior of amule

    On 2011-05-26 01:06, jony127 wrote:

    > Code:
    > --------------------
    > May 25 20:10:01 pc-jonatan kernel: [ 4224.178237] TCP: Possible SYN flooding on port XXXX. Sending cookies.
    > --------------------


    SYN flooding? Why do you have that?

    --
    Cheers / Saludos,

    Carlos E. R.
    (from 11.2 x86_64 "Emerald" at Telcontar)

  4. #4

    Default Re: unstable behavior of amule

    How I can fix this problem? had no prior problems with amule.

    I'm changing amule ports because they do not know what else I can do.

  5. #5
    Join Date
    Jun 2008
    Location
    San Diego, Ca, USA
    Posts
    11,411
    Blog Entries
    2

    Default Re: unstable behavior of amule

    SYN flooding usually can be described as "a ton of incoming traffic we don't know what to do with. Will likely result in half open connections leading to DoS."

    As a P2P app, amule like any other P2P client should know how to read and manage half open and an abnormally high number of connections. I don't know or have ever used amule so I can't state whether the app performs capably or not.

    The short term solution should be to make sure your firewall is up and the specific incoming port amule was using is blocked which should end those SYN Flood errors (which is caused by a TCP/IP socket willing to listen to those incoming packets).

    The longer term solution is to use a decent app, be sure your firewall is working properly and don't d/l illegal stuff (which would/could generally generate even more unwanted packets than usual).

    HTH,
    Tony

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