Here's a list of the ones I've found that aren't supported: ## IIS - [ ] 440 Login Timeout - [ ] 449 Retry With ## nginx - [ ] 495 SSL Certificate Error - [ ] 496 SSL Certificate Required - [x] 497 HTTP request sent to HTTPS port (idea: maybe have an image of a cat trying to go through a dog door for this?) (Added by #124) ## Cloudflare - [ ] 520 Web Server Returned an Unknown Error - [x] 521 Web Server Is Down - [ ] 522 Connection Timed Out - [x] 523 Origin Is Unreachable - [x] 524 A Timeout Occurred - [x] 525 SSL Handshake Failed - [ ] 526 Invalid SSL Certificate - [ ] 527 Railgun Error - [ ] 530 ## AWS ELB - [ ] 460 - [ ] 463 (maybe an image of 30 cats trying to do into a box at once?) - [ ] 561 Unauthorized **Note**: I got all these from [The Wikipedia Page](https://en.wikipedia.org/wiki/List_of_HTTP_status_codes)
Here's a list of the ones I've found that aren't supported:
IIS
nginx
Cloudflare
AWS ELB
Note: I got all these from The Wikipedia Page