When you have localhost IP, 127.0.0.1 binding problem.

[jahastech]

We found a Linux system not having 127.0.0.1 IP address. Its OS was Debian 10. Since NxFilter uses localhost port for internal communication, you may have some troubles when you don't have 127.0.0.1 IP address. You could have these problems,

1. 500 error for 'DNS > Setup' or you don't see cache size info.
2. Nothing returned for domain category test on 'Category > Test'.
3. Nothing returned for user test result by 'User > User > TEST' button.

Or if it's later than v4.5.1.7, it will stop in the starting process.

When you have one of the symptoms above run this command on your console,

ifconfig -a

And see if you have 127.0.0.1 set in the output. If you don't have it, you can fix the problem with this command,

ifconfig lo 127.0.0.1

And then restart it.