schwarzlist.sh: check if VPN address is in the public VPN list

[zimbabwe 22]

Here is another short, simple and mostly useless Linux script that you can use to batch-check IP addresses of WireGuard endpoints (taken from .conf files) against the public database of VPN IP ranges:

https://github.com/zimbabwe303/schwarzlist

It uses the grepcidr utility to do the main part of its job. So don't forget install it, it's present in the official repos of virtually every Linux distro out there.

Currently it finds more than 200 of AirVPN servers in that database but that does not necessarily mean it's better to use the "clean" ones: the sites which detect VPNs use much more than just the stupid IP range lists, they also check MTU, packet signatures, etc. so it's 99% chance you'll still be detected as being behind a VPN.

[ss11 20]

I really hope the assumption that you can treat an user based solely on the IP address will die soon. blacklists are many decades old stuff, subject to unacceptable false-positive rate that makes services and/or products unavailable to genuine, good intended users. IP addresses should not count at all, any real security expert will implement captchas or other security precautions in order to protect a service from automated requests or bots, overloading etc.

[OpenSourcerer 1442]

21 hours ago, ss11 said:

IP addresses should not count at all, any real security expert will implement captchas or other security precautions in order to protect a service from automated requests or bots, overloading etc.

No, any real security expert would use both, plus other security precautions. IP addresses from which all packets are dropped cannot do anything, simple as that, so it's a very simple and (cost-)effective measure.
Realize that all anonymizing tech is not only used for simple torrenting or surfing: Its foremost use is as a proxy for attacks. The VPN servers are blacklisted not because people are using it, it's because people are abusing it. Point your finger at those, not at the websites and services trying to protect themselves.