Certificate fails [error getting remote validation data 400]

1

I have installed on my one server, am installing on a second server first server went cleanly second one cannot get validation data

Log attached

2018-04-12 12:33:52.020 -04:00 [INF] Performing Config Tests
2018-04-12 12:34:14.198 -04:00 [INF] Beginning Certificate Request Process: Default Web Site
2018-04-12 12:34:14.199 -04:00 [INF] Registering Domain Identifiers
2018-04-12 12:34:14.199 -04:00 [INF] Attempting Domain Validation: remote.sunsouthlease.com
2018-04-12 12:34:14.200 -04:00 [INF] Registering and Validating remote.sunsouthlease.com
2018-04-12 12:34:15.818 -04:00 [INF] Performing Challenge Response via IIS: remote.sunsouthlease.com
2018-04-12 12:34:37.075 -04:00 [INF] Requesting Validation from Let’s Encrypt: remote.sunsouthlease.com
2018-04-12 12:34:43.134 -04:00 [INF] Domain validation failed: remote.sunsouthlease.com
[type, urn:acme:error:connection]
[detail, Fetching http://remote.sunsouthlease.com/.well-known/acme-challenge/st9tbD6_wDIx6cfLIsc6oMc-n_jMxwhjO9KftOp9Z58: Error getting validation data]
[status, 400]
2018-04-12 12:34:44.672 -04:00 [INF] Validation of the required challenges did not complete successfully. Domain validation failed: remote.sunsouthlease.com
[type, urn:acme:error:connection]
[detail, Fetching http://remote.sunsouthlease.com/.well-known/acme-challenge/st9tbD6_wDIx6cfLIsc6oMc-n_jMxwhjO9KftOp9Z58: Error getting validation data]
[status, 400]
2018-04-12 12:34:44.673 -04:00 [INF] Validation of the required challenges did not complete successfully. Domain validation failed: remote.sunsouthlease.com
[type, urn:acme:error:connection]
[detail, Fetching http://remote.sunsouthlease.com/.well-known/acme-challenge/st9tbD6_wDIx6cfLIsc6oMc-n_jMxwhjO9KftOp9Z58: Error getting validation data]
[status, 400]

2

Hi, so if you browse to http://remote.sunsouthlease.com/.well-known/acme-challenge/configcheck you’ll see you get a server error. That means your server is failing to serve extensionless files (required as part of the validation with Let’s Encrypt).

We try to auto configure that for you by putting a web.config in the /.well-known/acme-challenge folder. You might find that the directive in that file is causing an error so try taking that line out and see if you can get the configcheck URL to work.

Let me know how you get on.