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### Restricting Administrative Access to Control Panel

To alleviate security concerns, you may want to restrict administrative access to your control panel from specific IP addresses.

To allow administrative access to control panel only from specific IP addresses or networks:

1. Go to Server > Access.
2. Click Add New Network and specify the required IP addresses. Click OK.

   To specify subnets, you can use wildcard symbols (*) and subnet masks.

3. Select the Denied from the networks that are not listed option, and click Set. When prompted to confirm the operation, click OK.

To prohibit administrative access from specific IP addresses or networks:

1. Go to Server > Access.
2. Click Add New Network and specify an IP address. Click OK.

   To specify subnets, you can use wildcard symbols (*) and subnet masks.

3. Select the Allowed, excluding the networks in the list option, and click Set. When prompted to confirm the operation, click OK.

By default Plesk allows multiple simultaneous sessions for several users logged into the control panel using the same login and password combination. This can be useful when delegating management functions to other users or in case if you accidentally close your browser without logging out, thus becoming unable to log in again until your session expires. You may want to switch off this capability, if you do not need it.

To disallow concurrent sessions for your administrative control panel:

1. Go to Server > Edit.
2. Clear the Allow multiple sessions under administrator's login check box and click OK.