We're concerned here with Home networks; if you're on a public network, chances are very good that the firewall is controlled by someone else, and you won't have to worry about it.
Anyị na-eche banyere ebe a na netwọk Ụlọ; ọ bụrụ na ị nọ na netwọk ọha na eze, ohere dị mma nke na onye ọzọ na-achịkwa firewall, ị gaghị echegbu onwe ya.