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2. Using McAfee: Firewalls - AOL Help

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

   After you Lockdown Firewall, you can unlock it to allow network traffic. To instantly unlock Firewall and allow network traffic: 1. On the Windows® taskbar next to the clock, right click the McAfee icon, then click Open SecurityCenter. 2. Click the Lockdown Firewall link.

3. List of IP protocol numbers - Wikipedia

   en.wikipedia.org/wiki/List_of_IP_protocol_numbers

   ICMP Internet Control Message Protocol: RFC 792: 0x02 2 IGMP Internet Group Management Protocol: RFC 1112: 0x03 3 GGP Gateway-to-Gateway Protocol: RFC 823: 0x04 4 IP-in-IP IP in IP (encapsulation) RFC 2003: 0x05 5 ST Internet Stream Protocol: RFC 1190, RFC 1819: 0x06 6 TCP Transmission Control Protocol: RFC 793: 0x07 7 CBT Core-based trees: RFC ...

4. Disable third-party firewall software - AOL Help

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

   1. Click on the Start Button, and then click Settings. 2. In the Settings Menu click Network & Internet. 3. In this window make sure you have Ethernet selected on the left side and then click on Windows Firewall on the right side. 4. On the left side of the window click Turn Windows Firewall on or off. 5.

5. Enable and disable firewall in McAfee - AOL Help

   help.aol.com/.../mcafee-enable-and-disable-firewall

   To enable firewall protection: On the Windows taskbar, next to the clock, double-click the McAfee (M) icon. In the McAfee SecurityCenter window, click Web and Email Protection. Click Firewall Off. Click the Turn On button. Click Done. Don't see the McAfee icon next to the clock? If you're using Windows 7 or 8, click the arrow next to the clock ...

6. ICMP tunnel - Wikipedia

   en.wikipedia.org/wiki/ICMP_tunnel

   ICMP tunneling works by injecting arbitrary data into an echo packet sent to a remote computer. The remote computer replies in the same manner, injecting an answer into another ICMP packet and sending it back. The client performs all communication using ICMP echo request packets, while the proxy uses echo reply packets.

7. Stateful firewall - Wikipedia

   en.wikipedia.org/wiki/Stateful_firewall

   UDP hole punching is a technology that leverages this trait to allow for dynamically setting up data tunnels over the internet. [6] ICMP messages are distinct from TCP and UDP and communicate control information of the network itself. A well-known example of this is the ping utility. [7] ICMP responses will be allowed back through the firewall.