Last Updated: June 16th, 2010
A good diagnostic tool for any sysadmin is a port scanner to ensure a firewall is working as intended to open or close ports. When you want a quick and dirty scanning tool, there are some great free apps in the Market to do the trick. A quick search in the Market shows two apps which seem to be popular: OscanO and Port Scandroid.
Port Scandroid
This free app in the Market was written by Rich Jones of NewFreedomApps, found at http://www.thenewfreedom.net/ and the app is described by the author like this:
Port Scandroid is
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Last Updated: June 16th, 2010
Nagios is by far one of the best solutions for monitoring just about everything on a server, and it’s excellent API system means that anything it doesn’t include out of the box can be written in just about any programming language as long as the program output conforms to their standard. I’ve personally written dozens of modules for micro-managing network interfaces, disk IO and so on. I’ve even heard of elaborate schemes of detecting when system load is too high on web servers and launching more Amazon EC2 instances, or checking when load is low enough…
