Documentation Chapter 3:
Firewall Configuration & Considerations
If your primary PC is behind a firewall, the firewall must be configured to allow incoming connections on the default POP3 port (110), or any other that you specify in GoPOP.
Configuring the POP3 port in GoPOP
Note: The default POP3 port is 110. You will only need to take the following steps if you have special circumstances that require you to use a port different than 110.
After installing and launching GoPOP, go to the "Tools" menu and select "Options".
- Install GoPOP (see Chapter 2 instructions)
- Launch GoPOP
- Go to the "Tools" menu and select "Options"
- In the second to last field on the screen - "Listen on port:" - enter the port number you would like GoPOP to use for incoming connections.
- In your firewall configuration/settings/options (see your network admin or refer to the firewall manufacturer's documentation) ensure that the port number you establish in GoPOP allows incoming connections.
Users running Windows XP (Home or Professional version) will need to do the following, only if you are currently running the Windows XP firewall:
You have now successfully configured the Windows XP built-in firewall to allow incoming connections to GoPOP.
- Click the Start menu and select Control Panel
- Once the Control Panel window opens, select "Network Connections"
- From the Network Connections window, right click on whichever method it is that you are connecting to the internet, either the Dial-up Connection, or Local Area Network
- Select "Properties" from the menu
- Click on the "Advanced" tab - if the checkbox under Internet Connection Firewall is not selected (i.e. your firewall not enabled), you can ignore the next two steps.
- Select the "Settings" button at the bottom
- Check the "Post Office Protocol 3 (POP3)" box
Using Zone Labs' Zone Alarm Firewall
Instructions below refer to Zone Alarm Pro version 3.0.133
NOTE: The following has been noted with regard to Zone Alarm Pro:
Configuring Zone Labs' Zone Alarm Firewall
- Close/shutdown Zone Alarm prior to running GoPOP for the first time.
- If Zone Alarm is running when GoPOP launches for the first time, upon being prompted to "Do you want to allow GoPOP 1.0 to act as a server" - SELECT NO.
- GoPOP will continue to run, and will be enabled, you can then configure Zone Alarm to allow incoming access to GoPOP - see below.
You have now successfully configured the Zone Alarm to allow incoming connections to GoPOP.
- Launch the Zone Alarm Pro Control Center
- Select the "Program Control" tab
- Locate GoPOP in the list of Programs
- Click on each question mark (?) in the box under the "Access" heading and select "Allow" (the green check mark)
- Click on each question mark (?) in the box under the "Server" heading and select "Allow" (the green check mark)
Other firewall programs can be similarly configured to allow incoming connections on port 110 (or the port you specify in the GoPOP options). The settings involved are similar across firewall clients, but may be implemented or referenced differently.
If you are using a specific firewall and encounter errors or other problems, or have information that might be useful to other GoPOP users running the same firewall, please let us know!
Questions? Contact firstname.lastname@example.org
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