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I mentioned this in passing, but it bears repeating: You don’t have to include the port number to the IP address if the service uses the default port.
AVAST FIREWALL SETTINGS SHOULD BE ON PRIVATE OR PUBLIC SOFTWARE
In a TCP/IP computing context, a firewall is hardware and/or software that by default blocks all incoming Internet traffic to internal devices. A physical firewall is a divider that separates the passenger compartment from the engine compartment in an automobile here the word “firewall” takes on a literal meaning. Your Internet-facing router acts as a firewall to protect your private internal network. Learn More Buy Allowing Minecraft Traffic Through the Firewall