Resolved Firewall Whitelist with my IP block me

[Sergey K.]

Hello community!
I've enabled Plesk Firewall. Server is working well.

But from time to time I was not able to reach all my sites from my IP.
Access from any IPs is ok.

My IP was added in Whitelist of PleskFirewall .

Screen 1 - Screenshot

When I disable Plesk firewall and activate it again - all my access to site will be ok.
When I disable Plesk firewall - access from my IP is ok.

Hosted Server's firewall in this time was disabled.

Could you explain- is it Plesk Firewall issue or my misconfiguration?

 

[Kaspar]

Do you have fail2ban enabled? If you can't access your server from a certain IP address it's likely is got temporary banned by fail2ban. Add your IP address to the whitelist of fail2ban to prevent it from getting banned.

 

[Sergey K.]

Do you have fail2ban enabled? If you can't access your server from a certain IP address it's likely is got temporary banned by fail2ban. Add your IP address to the whitelist of fail2ban to prevent it from getting banned.

Thanks for the advice!
You were right.

It was fail2ban. I found by blocked IP - screen - Screenshot
Added to whitelist acc. to manual - Protection Against Brute Force Attacks (Fail2Ban)

Strange... I didn't attack my server