How to block SSL VPN connection from a certain source IP address?

provide instructions for blocking SSL VPN connections from specified source IP addresses. Whether you are in charge of a network firewall or a VPN server.


Blocking an SSL VPN connection from a specific source IP address typically involves configuring your network firewall or VPN server settings. The exact steps can vary depending on the specific firewall or VPN server software and hardware you are using. However, I can provide you with a general guideline on how to accomplish this:

Using a Firewall to Block SSL VPN from a Specific Source IP:

  1. Access Your Firewall: Log in to the firewall management interface. This is usually done through a web browser by entering the firewall's IP address.

  2. Create an Access Rule:

    • Locate the section for creating access rules or firewall policies.
    • Create a new rule that specifies the source IP address you want to block and the destination port used by the SSL VPN (commonly 443 for HTTPS).
    • Set the action to "Block" or "Deny."
  3. Apply the Rule:

    • Ensure the rule is positioned correctly in the rule list to take effect.
    • Save and apply the changes to the firewall configuration.
  4. Testing:

    • Test the configuration by attempting an SSL VPN connection from the blocked source IP address. It should now be denied.

Using VPN Server Configuration to Block IP:

If you want to block the IP from the VPN server side (assuming you have control over the VPN server), the steps might vary depending on the VPN software you are using. In some cases, you can block IP addresses directly from the VPN server's configuration:

  1. Access VPN Server Configuration:

    • Log in to your VPN server's administration interface or access its configuration files.
  2. Find IP Blocking Options:

    • Look for settings related to IP blocking or access control.
  3. Add the IP Address:

    • Add the specific source IP address you want to block to the IP blocking list.
  4. Save and Apply:

    • Save the configuration changes and apply them.


Please note that the specific steps can vary depending on your firewall or VPN server software. It's important to consult the documentation provided with your hardware or software for detailed instructions.

Also, be cautious when blocking IP addresses, especially if the IP address you are blocking is dynamic or shared, as this could potentially affect other users. Always make sure you have a legitimate reason to block an IP address, and consider using more advanced access control mechanisms if necessary.

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