I‘m still working on getting my rss feed mess which bombarded your feed reader and inbox two days ago. Meanwhile, our FAQ section is updated in last few days with new howtos (if you want FAQ updates just follow us on twitter or identi.ca):
Explains how to use Windows nslookup command to verify your own or ISP recursive DNS resolvers are free from DNS cache poisoning bug.
By default Apache webserver listen on port 80 (http) and port 443 (https i.e. secure http). Apache webserver uses the TCP protocol to transfer information/data between server and browser. The default Iptables configuration does not allow inbound access to the HTTP (80) and HTTPS (443) ports used by the web server. This post explains how to allow inbound and outbound access to web services under Linux.
This is very common scenario. You want to permit access to a remote machine only by SSH. You would like to block all incoming traffic to your system except ssh connection under Linux.