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That's a pretty nice message. Most sites that filter VPNs and proxies just kill the connection, give a generic error, or subject you to endless captchas.

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They could've blocked just the comments, allowing at least read-only access to the site, instead of blocking it off entirely

So could everyone that blocks network traffic for various reasons, but usually they don't because they're not doing it in the primary application layer, but using a WAF or reverse proxy or something else in front of their application... and also most DGAF to cater specifically to the users they block.

Again, you're usually lucky to even get a return packet.

I block all traffic from Cloudflare outright on my servers.

Every so often they sneak in new blocks of IP addresses though so you're playing whack-a-mole with a particularly scummy opponent.

They're pretty upfront about their ranges:

https://www.cloudflare.com/en-au/ips/

Or if you prefer:

https://www.cloudflare.com/ips-v4/#

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