The domain linuxbuz.com is being served through Cloudflare CDN. Any Let's Encrypt certificate installed on the origin server will only encrypt traffic between the server and Cloudflare. It is strongly recommended that the SSL option 'Full SSL (strict)' be enabled.
https://support.cloudflare.com/hc/en-us/articles/200170416-What-do-the-SSL-options-mean-
Requests made to the domain
Request to: linuxbuz.com/2606:4700:3033::ac43:b6d0, Result: [Address=2606:4700:3033::ac43:b6d0,Address Type=IPv6,Server=cloudflare,HTTP Status=301,Number of Redirects=1,Final HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://linuxbuz.com/.well-known/acme-challenge/letsdebug-test (using initial IP 2606:4700:3033::ac43:b6d0)
@0ms: Dialing 2606:4700:3033::ac43:b6d0
@26ms: Server response: HTTP 301 Moved Permanently
@26ms: Received redirect to https://linuxbuz.com/.well-known/acme-challenge/letsdebug-test
@26ms: Dialing 2606:4700:3033::ac43:b6d0
@4438ms: Server response: HTTP 404 Not Found
Request to: linuxbuz.com/2606:4700:3035::681c:4a7, Result: [Address=2606:4700:3035::681c:4a7,Address Type=IPv6,Server=cloudflare,HTTP Status=301,Number of Redirects=1,Final HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://linuxbuz.com/.well-known/acme-challenge/letsdebug-test (using initial IP 2606:4700:3035::681c:4a7)
@0ms: Dialing 2606:4700:3035::681c:4a7
@26ms: Server response: HTTP 301 Moved Permanently
@26ms: Received redirect to https://linuxbuz.com/.well-known/acme-challenge/letsdebug-test
@26ms: Dialing 2606:4700:3035::681c:4a7
@1715ms: Server response: HTTP 404 Not Found
Request to: linuxbuz.com/2606:4700:3036::681c:5a7, Result: [Address=2606:4700:3036::681c:5a7,Address Type=IPv6,Server=cloudflare,HTTP Status=301,Number of Redirects=1,Final HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://linuxbuz.com/.well-known/acme-challenge/letsdebug-test (using initial IP 2606:4700:3036::681c:5a7)
@0ms: Dialing 2606:4700:3036::681c:5a7
@26ms: Server response: HTTP 301 Moved Permanently
@26ms: Received redirect to https://linuxbuz.com/.well-known/acme-challenge/letsdebug-test
@26ms: Dialing 2606:4700:3036::681c:5a7
@3171ms: Server response: HTTP 404 Not Found
Request to: linuxbuz.com/172.67.182.208, Result: [Address=172.67.182.208,Address Type=IPv4,Server=cloudflare,HTTP Status=301,Number of Redirects=1,Final HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://linuxbuz.com/.well-known/acme-challenge/letsdebug-test (using initial IP 172.67.182.208)
@0ms: Dialing 172.67.182.208
@40ms: Server response: HTTP 301 Moved Permanently
@40ms: Received redirect to https://linuxbuz.com/.well-known/acme-challenge/letsdebug-test
@40ms: Dialing 172.67.182.208
@3143ms: Server response: HTTP 404 Not Found
Request to: linuxbuz.com/104.28.4.167, Result: [Address=104.28.4.167,Address Type=IPv4,Server=cloudflare,HTTP Status=301,Number of Redirects=1,Final HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://linuxbuz.com/.well-known/acme-challenge/letsdebug-test (using initial IP 104.28.4.167)
@0ms: Dialing 104.28.4.167
@45ms: Server response: HTTP 301 Moved Permanently
@45ms: Received redirect to https://linuxbuz.com/.well-known/acme-challenge/letsdebug-test
@45ms: Dialing 104.28.4.167
@3047ms: Server response: HTTP 404 Not Found
Request to: linuxbuz.com/104.28.5.167, Result: [Address=104.28.5.167,Address Type=IPv4,Server=cloudflare,HTTP Status=301,Number of Redirects=1,Final HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://linuxbuz.com/.well-known/acme-challenge/letsdebug-test (using initial IP 104.28.5.167)
@0ms: Dialing 104.28.5.167
@43ms: Server response: HTTP 301 Moved Permanently
@43ms: Received redirect to https://linuxbuz.com/.well-known/acme-challenge/letsdebug-test
@43ms: Dialing 104.28.5.167
@3084ms: Server response: HTTP 404 Not Found
A and AAAA records found for this domain
linuxbuz.com. 0 IN A 172.67.182.208
linuxbuz.com. 0 IN A 104.28.4.167
linuxbuz.com. 0 IN A 104.28.5.167
linuxbuz.com. 0 IN AAAA 2606:4700:3033::ac43:b6d0
linuxbuz.com. 0 IN AAAA 2606:4700:3035::681c:4a7
linuxbuz.com. 0 IN AAAA 2606:4700:3036::681c:5a7
Challenge update failures for linuxbuz.com in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/130490577
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": Invalid response from https://linuxbuz.com/.well-known/acme-challenge/QOwxHJZ_5LaJ4_lrb8t_IRsLdXFGC2xpf6o10VLw3ro [2606:4700:3036::681c:5a7]: "<!DOCTYPE html><html lang=\"en-US\"><head><meta charset=\"UTF-8\"><meta name=\"viewport\" content=\"width=device-width, initial-scale=1"