Citrix Netscaler is a very good system for load balancing, if you want to have an enterprise system and not do this in another way with Apache for free. It also provide a access gateways for ICA sessions. It's based on FreeBSD but it has no nagios-plugins inside like other firewall system e. g. GenuGate firewall systems.
My servers are mostly work with a normal load, but sometimes they have stress. In some cases the content application like TYPO3 or TomCat could not handle the mass of requests. So I've been searched for a automatic solution to display a busy-Page.
Cisco uses an different MIB to make information over SNMP for there NEXUS hardware available. tcomm.es provide some plugins to monitor such switches espacially for the FRU-hardware".
The intention for this short howto was to use the power of modsecurity to secure a Apache2 running as proxy for an MS Exchange OWA on wild wild web. The system described below is based on a debian lenny machine.
Let's start with editing the sources.list to get the latest version of modsecurity module. Simply add this line:
deb http://etc.inittab.org/~agi/debian/libapache-mod-security2 ./
and install the stuff.
