RoldanLT submitted a new resource:
XenForo Forum with Nginx fastcgi_cache full page guest caching - Capture returned data and persist it to a disk based cache store for a configurable amount of time.
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Credits to @eva2000 @hungphutho @MattW and @Floren for their guidance with I started digging it (y).
1st, required addon: https://xenforo.com/community/resources/logged-in-cookie.4961/
To have persistent cookie for Login Members.
Then add this code into your Nginx Config.