Level 17 is really simple. Just open the source code and you will find how to get the password for this level. You will see something like this in the source code; Password: your IP address, yes this is it.
IP stands for internet protocol address. Every connection has one of its own. You can check your by googling or visiting any of these given sites.
– http://whatismyipaddress.com/
– http://www.ip2location.com/