Again, we have covered this, but it is still one of the most common applications on servers, and as such, one of our potential vectors of attack. When it comes to web applications, we have even more potential areas that we can attack due to the common mistakes in the coding of the applications.

File Transfer Protocol (FTP) has been around for a very long time. In this section, we are going to use an advanced method of FTP that can be used when you encounter an environment that does not allow the standard FTP client/server communication to work. An excellent reference for information on protocols is the Network Sorcery website; you can find it at http://www.networksorcery.com. There is a wealth of information here for reference; the area we want to concentrate on is RFC Sourcebook | Protocols. An example...