Search
Setup for Free
CD
Cloudflare Developers
Code Error 521
Original message was deleted
Cloudflare Developers
Join
Welcome to the official Cloudflare Developers server. Here you can ask for help and stay updated with the latest news
83,498
Members
View on Discord
Resources
ModelContextProtocol
ModelContextProtocol
MCP Server
Similar Threads
© 2026 Hedgehog Software, LLC
Twitter
GitHub
Discord
System
Light
Dark
More
Communities
Docs
About
Terms
Privacy
Similar Threads
Error code 521
CD
Cloudflare Developers / general-help
2y ago
code error 521
CD
Cloudflare Developers / general-help
3y ago
Error 521
CD
Cloudflare Developers / general-help
12mo ago
521 Error
CD
Cloudflare Developers / general-help
2y ago
C
Cyb3r-Jak3
•
10/6/23, 4:27 PM
Is this origin server or are you using pages to host
?
!
! XenoXzOFF ×͜×
•
10/6/23, 4:29 PM
IDK
C
Cyb3r-Jak3
Is this origin server or are you using pages to host?
!
! XenoXzOFF ×͜×
•
10/6/23, 4:30 PM
But i
'm on a VPS with a domain name
C
Cyb3r-Jak3
Is this origin server or are you using pages to host?
!
! XenoXzOFF ×͜×
•
10/6/23, 4:30 PM
!
! XenoXzOFF ×͜×
•
10/6/23, 4:30 PM
!
! XenoXzOFF ×͜×
•
10/6/23, 4:31 PM
!
! XenoXzOFF ×͜×
•
10/6/23, 4:32 PM
!
! XenoXzOFF ×͜×
•
10/6/23, 4:32 PM
WTF
C
Cyb3r-Jak3
•
10/6/23, 4:35 PM
If you unproxy the AAAA record and wait for DNS cache to expire you should see the web server and why it is down
!
! XenoXzOFF ×͜×
•
10/6/23, 4:36 PM
This
?
!
! XenoXzOFF ×͜×
•
10/6/23, 4:37 PM
It
's good
?
!
! XenoXzOFF ×͜×
•
10/6/23, 4:40 PM
Sorry
, this page cannot be accessed
. sedna
-hosting
.site denied the connection
.
Try
:
Verifying the Connection
Proxy and Firewall Verification
ERR
_CONNECTION
_REFUSED
C
Chaika
•
10/6/23, 4:41 PM
Your VPS is down
, or the web server on it is down
/broken
, or some other application
/web server error
C
Chaika
•
10/6/23, 4:41 PM
Do the usual debugging
, check if you can access it
, check if the web server is up
, check error logs
, etc
!
! XenoXzOFF ×͜×
•
10/6/23, 4:41 PM
how
!
! XenoXzOFF ×͜×
•
10/6/23, 4:41 PM
!
! XenoXzOFF ×͜×
•
10/6/23, 4:42 PM
pterodactyl doesn
't work too
!
! XenoXzOFF ×͜×
•
10/6/23, 4:42 PM
https://panel.sedna-hosting.site
https://sedna-hosting.site
https://php.sedna-hosting.site
C
Cyb3r-Jak3
•
10/6/23, 4:43 PM
Yeah then you need to login to your VPS and get the ports open again
. If you can
’t login then you need to contact your VPS provider
C
Cyb3r-Jak3
Yeah then you need to login to your VPS and get the ports open again. If you can...
!
! XenoXzOFF ×͜×
•
10/6/23, 4:44 PM
what is the port pls
!
! XenoXzOFF ×͜×
what is the port pls
C
Cyb3r-Jak3
•
10/6/23, 4:45 PM
Standard https port 443
!
! XenoXzOFF ×͜×
•
10/6/23, 4:45 PM
The port is already open
C
Cyb3r-Jak3
•
10/6/23, 4:47 PM
Okay but you can
’t connect not going through Cloudflare so it
’s not a Cloudflare issue
. Maybe there are other firewall rules in place
!
! XenoXzOFF ×͜×
•
10/6/23, 4:48 PM
I trun on this
?
C
Chaika
•
10/6/23, 4:48 PM
nothing in cloudflare has anything to do with the issues you are experiencing right now
C
Chaika
•
10/6/23, 4:48 PM
it
's entirely your origin web server not working
, as indicated by it not working even on dns
-only
!
! XenoXzOFF ×͜×
•
10/6/23, 4:49 PM
yep
!
! XenoXzOFF ×͜×
•
10/6/23, 4:49 PM
i have already a open ticket in LWS for the VPS
C
Chaika
•
10/6/23, 4:49 PM
It is an unmanaged vps
, or a shared hosting service
?
!
! XenoXzOFF ×͜×
•
10/6/23, 4:50 PM
nope
!
! XenoXzOFF ×͜×
•
10/6/23, 4:50 PM
!
! XenoXzOFF ×͜×
•
10/6/23, 4:50 PM
I
'm french but my navigator is in French
^
^
I translate for you
!
! XenoXzOFF ×͜×
•
10/6/23, 4:51 PM