Setting Up a POP3 Filter

You can set up a Post Office Protocol 3 (POP3) exception on the server's public interface to allow public clients to access a private POP3 server behind the Novell BorderManager firewall.

This section contains:

• Setting Up a Stateful POP3 Filter
• Setting Up a Static POP3 Filter

IMPORTANT:  These filters do not forward requests for domain name resolution by a DNS server in your private network. A DNS filter is required.

Setting Up a Stateful POP3 Filter

To set up a stateful POP3 filter exception,

1. Select Configure TCP/IP Filters > Packet Forwarding Filters > Exceptions.

2. Press Ins to define a new exception.

3. Specify All Interfaces for the Source Interface parameter.

4. Specify the server's public interface for the Destination Interface parameter.

5. If you want the server to forward mail from certain public hosts only, specify Host or Network for the Src Addr Type parameter > enter the IP address for the Src IP Address parameter; otherwise, leave the setting for Src Addr Type as Any Address.

6. If you want the server to forward mail addressed to certain private hosts only, specify Host or Network for the Dest Addr Type parameter > enter the IP address for the Dest IP Address parameter; otherwise, leave the setting for Dest Addr Type as Any Address.

7. Press Enter for Packet Type > select pop3-st.

8. Press Esc > select Yes to save the filter.

Setting Up a Static POP3 Filter

If you do not want to configure a stateful POP3 exception, you can create a static filter instead. Make sure you enable ACK bit filtering for the exception in the inbound direction.