Since NZBGetter v1.1 it is possible to restrict access to the webinterface based on IP address.
How does it work?>
There are no restrictions by default. If you want to restrict access, you need to create a file named ip.txt in the scripts conf/ directory.
Just put all the IP addresses you want to allow access on a single line separated by a comma. You can write the complete IP adresse, but you can also use wildcards like 192.168.*
For example a line could look like this:
122.121.120.119,80.100.90.*,124.*
FYI, your current IP address is: %%-CURRENTIP-%%