Is this extension IPv6 compatible?¶
Yes it is. It uses the comIP() method of GeneralUtility which can validate IPv4 and IPv6 addresses.
What about "Logout"?¶
Ah yeah. That's funny? Users with matched IP addresses are authenticated with EACH request. You can't logout. So, if you press "Logout" the page reloads, we have a new request and you're logged in again.