Logging domain of http requests in apache

paullb asked:

looking at httpd’s access log and I see requests but they all start at “/”.

I have a few ServerAliases set up. Is there any way to see what domain (subdomain) the requests are coming in to?

My answer:

Apache doesn’t log the hostname by default, though you can change your Apache log format to log it. I prefer to log it in the otherwise useless second field, for example:

LogFormat "%h %{Host}i %u %t "%r" %>s %b "%{Referer}i" "%{User-agent}i"" combined

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