One of the web sites on my server is receiving several hits per day, all triggered (I think) by the server's cron at 9:00 am. It's the only site hit out of about a dozen sites using letsencrypt certs on that server and has several domain names tied to its cert. It is the latest site added to the server; previously it was hosted on a Windows IIS server. This may have something to do with it?
I began to notice it in the site logs a couple of weeks ago, when there were two hits per day. It went up to 4 hits, then six, and yesterday it was eight; today it's back to two. Always goes in increments of two hits. I have whitelisted the bot, although there was a period of about a week when I inadvertently blocked some of its IPs.
Todays hits are coming from (in twos):
My domain is: about-bristol.co.uk
I ran this command: (site logs)
It produced this output: /.well-known/acme-challenge/(id)
My web server is (include version): Apache/2.4.18 (Ubuntu)
The operating system my web server runs on is (include version): Mint 18.1
My hosting provider, if applicable, is:
I can login to a root shell on my machine (yes or no, or I don't know): yes
I'm using a control panel to manage my site (no, or provide the name and version of the control panel): no
The version of my client is (e.g. output of
certbot --version or
certbot-auto --version if you're using Certbot): 0.31.0