Today I saw a weird entry in my web server log. Someone tried to browse the following URL:
https://appserver1bb.mydomain.com/conversation/ajax-html/send_log
This looks like a random probe which I would normally ignore, but the weird part is the server name "appserver1bb" is not published anywhere except Google Cloud DNS. How could anyone know this server even exists?
Source: r/dns · by /u/Putrid_Gear6895