Plesk 9.x

1. Login to Plesk control panel.
2. Click on Modules >> Firewall >> Edit Firewall Configuration.
3. Click on ‘Add Custom Rule’.
4. Enter a name for the rule.
5. Select the option ‘Incoming’ for ‘Match direction’.
6. Select ‘Deny’ for Action.
7. If you wish to add port, you can enter the port or port range in text box beside the option ‘Add port or port range’. Click Add. Select TCP or UDP protocol. If you do not wish to add port, leave it as it is.
8. Add the IP address to be blocked in the text box beside the option ‘Add IP address or network’. Click Add.
9. Click OK.
10. Click Activate.

Plesk 10.x

1. Login to Plesk control panel.
2. Click on Tools & Settings >> Firewall >> Edit Firewall Configuration.
3. Click on ‘Add Custom Rule’.
4. Enter a name for the rule.
5. Select the option ‘Incoming’ for ‘Match direction’.
6. Select ‘Deny’ for Action.
7. If you wish to add port, you can enter the port or port range in text box beside the option ‘Add port or port range’. Click Add. Select TCP or UDP protocol. If you do not wish to add port, leave it as it is.
8. Add the IP address to be blocked in the text box beside the option ‘Add IP address or network’. Click Add.
9. Click OK.
10. Click Activate.

Plesk 12.x

1. Login to Plesk control panel.
2. Click on Tools & Settings >> Firewall
3. Click on Modify Plesk Firewall Rules >> Add Custom Rule
4. Enter a name for the rule.
5. Select the option ‘Incoming’ for ‘Match direction’.
6. Select ‘Deny’ for Action.
7. If you wish to add port, you can enter the port or port range in text box beside the option ‘Add port or port range’. Click Add. Select TCP or UDP protocol. If you do not wish to add port, leave it as it is.
8. Add the IP address to be blocked in the text box beside the option ‘Add IP address or network’. Click Add.
9. Click OK.
10. Apply Changes.