Hi @maxhax,
Thank you for the details.
this morning a message came informing me that I had to check the block rules cause otherwise at the next login it should have been impossible to log.
That was a warning of “preventing self blocking”:

In that case, please execute “Scan country code” at the top of “Validation rule settings“. Sometimes, a certain IP is registered as a different country code in different databases.
sample1: 
sample2: 
Here are my answers against your questions:
1. Please refer to “I’m locked out! What shall I do?” in FAQ, “What should I do when I’m locked out?” or just rename the plugin directory such as ip-geo-block
to ip-geo-block-
in your /wp-content/plugins/
.
2. I’m sorry I’m not sure. This plugin just picks up the IP from some PHP environment variables.
3. One possibility is that your IP may be assigned dynamically by the VPN connection. So please compare IPs between your sites.
4. I think there must be a reason. Only I can say now is please keep watching your site.
By the way, one thing I should ask you from my side is where or which country is your server placed, in Switzerland or in United states?
In some cases, your server may send requests to the back-end of itself. So if your server in US and you configure IPGB to block any requests from US, those would be blocked. So you should put your server’s IPs into the “Whitelist of extra IP addresses prior to country code“.
This is not related to this issue, but please be careful.
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This reply was modified 6 years, 8 months ago by
tokkonopapa.
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This reply was modified 6 years, 8 months ago by
tokkonopapa.