Situation:
You cannot make a successful FTP connection with Norton Internet Security (NIS) or Norton Personal Firewall (NPF) enabled. Disabling NIS or NPF allows the FTP connection to work.

Solution:
Your FTP client has likely not been configured for passive FTP connections. To fix this problem, you will need to set your FTP client to make a passive FTP connection. This forces the FTP client to establish the full connection, rather than leaving part of the connection to the server, which can be blocked by NIS, NPF, or other firewalls.

To configure Passive FTP within Internet Explorer:

1. Open Internet Explorer.
2. Click Tools, then choose Internet Options. The Internet Options screen appears.
3. Click the Advanced tab.
4. Navigate to the Browsing section.
5. Place a check mark in Use Passive FTP for compatibility with some firewalls and DSL modems.
6. Click Apply. The changes you just made are saved.
7. Click OK. The Internet Options screen closes.

NOTE: To configure Passive FTP for other FTP clients, refer to the Help menu, software manual, or the program vendor for your specific product.

If setting Passive FTP does not fix the problem, you will need to create a System-Wide rule to make the FTP connection.

Follow these steps to create an FTP System-Wide rule:

1. Open NIS or NPF.
2. Click Personal Firewall.
   
   
   
3. Click Internet Access Control.
4. Click Configure.
5. Click System-Wide Settings.
6. Click Add. The Add Rule screen appears.
7. Select Permit Internet Access, then click Next.
8. Select Connections to and from other computers, then click Next.
9. Select Any computer, then click Next.
10. Select TCP and UDP.
11. Select Only the types of communication or ports listed below.
12. Click Add.
13. Select Known ports from list.
14. Navigate down the list and place a check mark next to Ports 20 and 21 (FTP), then click OK.
    
    
    
15. The Add Rule screen appears displaying port 20 and port 21.
    
    
    
16. Click Next.
17. Place a check mark in the box next to "Create an event log entry", then click Next.
18. Type a description name for the rule you just created, for example: FTP, then click Next. An Add Rule screen appears, displaying a description of the rule you just created.
19. Click Finish. The System-Wide Settings screen appears. Navigate to the end of the list and you will see the new rule that you just created.
    
    
    
20. Click OK. The main NIS/NPF screen appears. You will now be able to make an FTP connection.