[False positive] 127.0.0.1

So apparently 127.0.0.1 is flagged as a malware threat on URLhaus, causing this filter to block the 127.0.0.1 address, preventing any local service from being accessed.

I believe the entire address block 127.0.0.0/8 should be whitelisted - these are all reserved addresses and are (hopefully) non-malicious. The IPv6 variant, ::1, should probably be whitelisted too for the same reason.