I've been trying to set up a reverse proxy on a main website to a blog site of the url format
example.com/blog -> blog.example.com
example.com/blog is on an Apache instance and in the httpd.conf I have added the following.
SSLProxyEngine on
ProxyPreserveHost Off
ProxyRequests Off
ProxyPassMatch /blog https://blog.example.com
ProxyPassReverse /blog https://blog.example.com
This all works but it keeps 404ing. The good news is it is actually reverse proxying correctly because it grabs the 404 page of the blog.
After looking at the apache access logs I found that it is passing the subpath for whatever reason /blog to blog.example.com so its fetching blog.example.com/blog. When users navigate to /blog, it does 404 naturally. However, my understanding was when setting up ProxyPassReverse is it would make the request at what was specified so in my above case it should be requesting blog.example.com and not passing the /blog at the end.
Here is the snippet from the documentation that confirms the above in how it should work:
For example, suppose the local server has address http://example.com/; then
ProxyPass /mirror/foo/ http://backend.example.com/
ProxyPassReverse /mirror/foo/ http://backend.example.com/
ProxyPassReverseCookieDomain backend.example.com public.example.com
ProxyPassReverseCookiePath / /mirror/foo/
will not only cause a local request for the http://example.com/mirror/foo/bar to be internally converted into a proxy request to http://backend.example.com/bar (the functionality which ProxyPass provides here).
Any ideas why this might be? Worst case I might try to add a redirect or a rewrite so /blog goes to the homepage but I do have my permalinks set up in such a way that the /blog is in the slug of articles.
FYI I am using Apache 2.2.
