Hello, i'm using Directadmin to create/renew SSL for my website.
First, my VPS IP is 126.96.36.199, i create a host ntlamnt.tk and point my record A to this IP and when i create SSL for my domain ntlamnt.tk, i got error.
Here is the error link show up: https://acme-v02.api.letsencrypt.org/acme/authz-v3/10236167415
Second, i change my VPS IP to different VLAN: 188.8.131.52, point record A to this IP and i can create SSL for my domain ntlamnt.tk and www.lamnt.tk with no problems:
Finally, i change my VPS IP back to VLAN 103.159.52.x with different IP: 184.108.40.206 for my domain mail.ntlamnt.tk and i got the same problem at from the First:
So, i can not create/renew SSL with this VLAN 103.159.52.x ( any IP from this VLAN not work ), but with VLAN 203.162.51.x, i can create SSL with no problems.
I disabled all firewall in my VPS but still have problems, so how can i check if my IP range is blocked by Let's Encrypt or any connection problems from my VLAN 103.159.52.x to Let's Encrypt server ?