Learn how to unblock IP in Plesk. Our Plesk Support team is here to help you with your questions and concerns.

Plesk Unblock IP | Guide

Fail2Ban is a useful tool that uses regular expressions to detect and counteract brute-force attacks. Today, we are going to take a look at Fail2Ban and explore how it monitors log files for suspicious patterns, bans malicious IP addresses, etc.

Fail2Ban works by tracking authentication failures and other suspicious activities in log files. If an IP address exceeds a threshold of login attempts within a specific time frame, Fail2Ban sets a temporary ban. This adds an extra layer of security.

Furthermore, we can automate firewall rule adjustments and send alerts to administrators. After the ban period, the IP address is automatically unbanned.

However, sometimes setting up a new email or making changes to your server’s configuration may lead to your IP address being blocked. Here’s a simple guide on how to fix this:

1. To begin with, check if you can find the public IP address by conducting a quick search on Google using the query “my ip.”
2. Then, log into the VPS Control Panel via the hosting provider’s interface.
3. Next, click “Tools and Settings” in the Control Panel and select “IP Address Banning (Fail2Ban).”
4. Now, review the list of banned IP addresses. If we find our IP address, select it and choose “Move To Trusted IPs” to unban it.

Alternatively, we can unban via Command Line:

1. First, connect to the Plesk server via SSH.
2. Then, unban the IP address as seen here:

   plesk bin ip_ban --unban OUR_IP_ADDRESS
3. Now, add the IP address to the trusted list:
   plesk bin ip_ban --add-trusted OUR_IP_ADDRESS

Checking and Removing IP Blocks in Plesk

Did you know that IP addresses can be blocked in different locations within Plesk? Here’s where to look and how to fix the issue:

1. First, log into Plesk.
2. Then, head to Tools & Settings and click Firewall to check for potential blocking rules.
3. For mail service, go to Tools & Settings and click Mail Server Settings. Then click the Blacklist tab.
4. For Plesk for Linux, go to Tools & Settings and select IP Address Banning (Fail2Ban).
5. Additionally, some extensions like Imunify360 or Juggernaut Firewall have their own blacklists. So check the extension’s settings as well.

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Conclusion

In brief, our Support Experts demonstrated how to unblock IP in Plesk.