A lot of relays are behind cloudflare or use other reverse software that protects the server by rejecting connections such as VPNs and Tor among other things. nostr:npub16r0tl8a39hhcrapa03559xahsjqj4s0y6t2n5gpdk64v06jtgekqdkz5pl once shared this which explains how to update Cloudflare. (Forked to show updated UI)
Discussion
Stop using centralized, centralizing stuff like cloudflare.
It's gross and you should be ashamed of yourselves.
I should probably go through my relay list and remove the ones that use CloudFlare - and probably pay for ones that don't.
I totally understand its utility - and I get that info on relays is public anyway - but it's as close to just having the NSA run a relayer as one can get. Especially if you let them handle SSL encryption.