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firewall:iptables:ports:allow:port-range
This command adds a rule to the INPUT chain of the iptables firewall that drops (i.e. rejects) incoming TCP traffic on the port range specified by the variables starting_port_number and ending_port_number.
The sudo command is used to run the iptables command with elevated privileges as a superuser or administrator.
The -A INPUT option specifies that the rule should be appended to the existing rules in the INPUT chain of the firewall.
The -p tcp option specifies that the rule should be applied to TCP traffic.
The --dport option specifies the destination port number(s) that the rule should apply to. The ${starting_port_number}:${ending_port_number} syntax is used to define a range of ports from starting_port_number to ending_port_number.
The -j DROP option specifies that any incoming traffic matching this rule should be dropped and not allowed through the firewall.