Port 3306 is for MySQL
If you are running a mySQL database server and wish to allow internet access (ensure you have strong passwords) then you will need to setup a port forward within Link Logger for port 3306 such that future inbound traffic on this port will be logged as normal and not as an alert within Link Logger.
mySQL Bot scans this port looking for mySQL servers with weak passwords and if it is successful in logging in as root (ie DBA access) then it will use an exploit to install the bot on the system.
Not really.. also
Why use xampp 1.7.2? You will probably have problems with that later on..