Link : http://natas3.natas.labs.overthewire.org/
Natas 3 screen :
Natas 3 source code :
No more information leaks!! Not even Google will find it this time...
This phrase is a reference to : robots.txt
Then go to :
http://natas3.natas.labs.overthewire.org/robots.txt
Here you can find this :
Then you have :
http://natas3.natas.labs.overthewire.org/s3cr3t
Finally you find the file users.txt where is located Natas 4 password
So the password for Natas 4 is : Z9tkRkWmpt9Qr7XrR5jWRkgOU901swEZ