CSS 11050 SYN Attacks and auto-reboot

lightspeedvt · ‎07-14-2006

Running software version 5.00 build 2 to load balance two web servers. The DOS log shows SYN attack activity--with one incident logging 62 "attacks". I read that if this value reaches a threshold, then the machine will reboot. Can someone tell me what the guidelines are for this? Are there any other events that can cause the switch to auto reboot? Thanks!

Gilles Dufour · ‎07-16-2006

First, you should definitely upgrade.

5.0(2) is VERY VERY OLD.

Next, a box never reload by itself on purpose or because it reached a certain threshold.

If there is an auto-reboot, this means the box crash and this is not normal.

Gilles.

lightspeedvt · ‎07-17-2006

Thanks for the response, Gilles. What is the latest version I can upgrade this box to?

Gilles Dufour · ‎07-17-2006

the recommended version is 6.10(4.05) that you can download from :

http://www.cisco.com/cgi-bin/tablebuild.pl/webns-maint

Gilles.