LE renewal suddenly returns 404 via Webmin/Virtualmin

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Hi @colcol

that's curious.

Checked with my browser - the file is there.

Checked with a local download (like curl) - the file is there.

Checked directly via "check-your-website" - https://check-your-website.server-daten.de/?q=sendy.colcolmail.co.uk%2F.well-known%2Facme-challenge%2F3lkoagekexitrebco7vxkd-uoslsx8c7hi-jc9dlutg

The same address - has a http status 404 - Not Found:

Domainname Http-Status redirect Sec. G
• http://sendy.colcolmail.co.uk/.well-known/acme-challenge/3lkoagekexitrebco7vxkd-uoslsx8c7hi-jc9dlutg 52.16.62.68 GZip used - 141 / 178 - 20,79 % 404 Html is minified: 108,54 % 0.090 M
Not Found
• https://sendy.colcolmail.co.uk/.well-known/acme-challenge/3lkoagekexitrebco7vxkd-uoslsx8c7hi-jc9dlutg 52.16.62.68 GZip used - 141 / 178 - 20,79 %
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0 404 Html is minified: 108,54 % 3.596 M
Not Found

Is there a bot detection system that blocks?

Looks like some ip addresses or too much checks are blocked.

Is it possible to skip that precheck in Webmin?

Yep, there must be another filter:

D:\temp>download http://sendy.colcolmail.co.uk/.well-known/acme-challenge/3lkoagEKexItREBcO7Vxkd-UosLSx8C7hi-jc9dLUtg -h
SystemDefault
Connection: keep-alive
Accept-Ranges: bytes
Content-Length: 87
Content-Type: application/octet-stream
Date: Sun, 02 Feb 2020 18:50:26 GMT
ETag: "5e37100e-57"
Last-Modified: Sun, 02 Feb 2020 18:08:14 GMT
Server: nginx/1.10.3 (Ubuntu)

Status: 200 OK

126,27 milliseconds
0,13 seconds

D:\temp>curl http://sendy.colcolmail.co.uk/.well-known/acme-challenge/3lkoagEKexItREBcO7Vxkd-UosLSx8C7hi-jc9dLUtg
3lkoagEKexItREBcO7Vxkd-UosLSx8C7hi-jc9dLUtg.S-ioFVYBdwo6CicVxA_rTWJ7OKa28s9vVg-8BzwwRa8
D:\temp>download http://sendy.colcolmail.co.uk/.well-known/acme-challenge/3lkoagekexitrebco7vxkd-uoslsx8c7hi-jc9dlutg -h
SystemDefault
Error (1): Der Remoteserver hat einen Fehler zurückgegeben: (404) Nicht gefunden.
ProtocolError
Connection: keep-alive
Content-Length: 178
Content-Type: text/html
Date: Sun, 02 Feb 2020 18:56:24 GMT
Server: nginx/1.10.3 (Ubuntu)

Status: 404 NotFound
404

160,06 milliseconds
0,16 seconds

D:\temp>curl http://sendy.colcolmail.co.uk/.well-known/acme-challenge/3lkoagEKexItREBcO7Vxkd-UosLSx8C7hi-jc9dLUtg
3lkoagEKexItREBcO7Vxkd-UosLSx8C7hi-jc9dLUtg.S-ioFVYBdwo6CicVxA_rTWJ7OKa28s9vVg-8BzwwRa8
D:\temp>

Download - worked. Curl - worked. Again Download - doesn't work. Curl - worked again.

You have to find and remove or deactivate that filter (if the path starts with /.well-known/). Perhaps it's in your configuration or it's your hoster.

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