http://www.linuxhelp.org/syndrop.shtml
Read the redhat errata it hould be in there, and they 'should' have a
kernel rpm for you to use if you don't feel comfortable patching it yourself.
Dan
At 05:31 PM 4/19/1998 -0700, David S Edwards wrote:
>Hello,
>
>I've been having a problem with my RH5.0 - 2.0.32 web server with SYN
>floods. Here is a snippet out of my syslog:
>
>Apr 19 15:25:41 ns1 kernel: Warning: possible SYN flood from 195.121.17.136
>on 204.247.201.161:80. Sending cookies.
>Apr 19 15:26:41 ns1 kernel: Warning: possible SYN flood from 199.234.156.14
>on 204.247.201.166:80. Sending cookies.
>Apr 19 15:27:41 ns1 kernel: Warning: possible SYN flood from 130.67.129.231
>on 204.247.201.178:80. Sending cookies.
>Apr 19 15:27:54 ns1 inetd[2842]: fork: Resource temporarily unavailable
>Apr 19 15:28:01 ns1 last message repeated 7 times
>Apr 19 15:29:01 ns1 kernel: Warning: possible SYN flood from
>192.115.179.170 on 204.247.201.168:80. Sending cookies.
>Apr 19 15:29:06 ns1 inetd[2842]: fork: Resource temporarily unavailable
>Apr 19 15:29:38 ns1 last message repeated 10 times
>Apr 19 15:29:58 ns1 last message repeated 11 times
>
>This has the effect of locking me out of the system until the SYN flood
>stops. Has anyone seen this before? Is there a way to stop this? These
>SYN floods take up all of the system resources so I can't even log in. I
>end up having to kill the power to reboot.
>
>This system is a pentium II 300 with 384 megs ram. I've run both apache
>1.2.5 and 1.3b5 on it and have had the same problem with both. I have two
>other systems with a similar config that don't seem to have this problem.
>Any suggestions?
>
>TIA,
>david
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