$wgCookieDomain setting has no effect
Fragment of a discussion from Project:Support desk
Hello! I appreciate this is a really open question - is there anything I can do to help whittle down the cause? The inability to correctly set my cookie domain iss causing issues with my SSO solution.
First of all do you have any authentication extensions installed. If they handle the cookies themselves, they may override MW's settings for the cookie domain.
>MediaWiki defaults to 'practicalplants.local'.
MediaWiki should default to not setting a cookie domain whatsoever.
You're sure you are setting $wgCookieDomain at the very bottom of LocalSettings.php?
What does the set-cookie http header that MediaWiki sends look like?