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2. Disable third-party firewall software - AOL Help

   help.aol.com/articles/disable-third-party...

   2. In the left pane, click Firewall. 3. In the Internet Zone Security section, move the slider to Off. Notes: To enable the firewall, repeat steps 1 to 3. In the Internet Zone Security section, move the slider to High. In the Trusted Zone Security section, move the slider to High. 4. Close the ZoneAlarm window. 5. If prompted, click OK.

3. Egress filtering - Wikipedia

   en.wikipedia.org/wiki/Egress_filtering

   Egress filtering may require policy changes and administrative work whenever a new application requires external network access. For this reason, egress filtering is an uncommon feature on consumer and very small business networks. PCI DSS requires outbound filtering to be in place on any server in the cardholder's environment.

4. Port triggering - Wikipedia

   en.wikipedia.org/wiki/Port_triggering

   Port triggering is a configuration option on a NAT-enabled router that controls communication between internal and external host machines in an IP network. It is similar to port forwarding in that it enables incoming traffic to be forwarded to a specific internal host machine, although the forwarded port is not open permanently and the target internal host machine is chosen dynamically.

5. Port forwarding - Wikipedia

   en.wikipedia.org/wiki/Port_forwarding

   Dynamic port forwarding (DPF) is an on-demand method of traversing a firewall or NAT through the use of firewall pinholes. The goal is to enable clients to connect securely to a trusted server that acts as an intermediary for the purpose of sending/receiving data to one or many destination servers. [12]

6. Port knocking - Wikipedia

   en.wikipedia.org/wiki/Port_knocking

   In computer networking, port knocking is a method of externally opening ports on a firewall by generating a connection attempt on a set of prespecified closed ports. Once a correct sequence of connection attempts is received, the firewall rules are dynamically modified to allow the host which sent the connection attempts to connect over specific port(s).

7. Using McAfee: Firewalls - AOL Help

   help.aol.com/articles/Using-McAfee-Firewalls

   If the Advanced Menu is enabled click the Lockdown Firewall link in the Home section. If the Basic Menu is enabled click the Lockdown Firewall link in the Common Tasks section. 3. In the Lockdown pane, click the Unlock button. 4. Click the Yes button to confirm that you want to unlock firewall and allow all inbound and outbound traffic.

8. Application-level gateway - Wikipedia

   en.wikipedia.org/wiki/Application-level_gateway

   The Application Layer Gateway service in Microsoft Windows provides support for third-party plugins that allow network protocols to pass through the Windows Firewall and work behind it and Internet Connection Sharing. [citation needed] ALG plugins can open ports and change data that is embedded in packets, such as ports and IP addresses.

9. Hole punching (networking) - Wikipedia

   en.wikipedia.org/wiki/Hole_punching_(networking)

   The firewalls also note the endpoints in order to allow responses from the server to pass back through. The server then sends each client's endpoint and session information to the other client, or peer. Each client tries to connect to its peer through the specified IP address and port that the peer's firewall has opened for the server.