互联网浏览器和防火墙
每当我安装打开 TCP/IP 端口的程序时,防火墙就会中断并请求许可。
我注意到互联网浏览器的情况并非如此。为什么我安装的各种浏览器防火墙都没有中断?
我正在使用 Windows 防火墙。
谢谢。
Whenever I install a program that opens a TCP/IP port, the firewall interrupts and asks for permission.
I have noticed that this is not the case with Internet Browsers. Why is it that firewall has not interrupted for various browsers that I have installed?
I am using Windows Firewall.
Thanks.
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大多数浏览器流量将通过已打开的端口 80 和 443 进行。也可能是防火墙是有状态的,因此启用了任何出站连接,并且防火墙会记住此连接并允许返回数据,仅阻止该端口上的传入连接。
Most browser traffic will be over port 80 and 443 which will either be open already. It could also be the case that the firewall is stateful so any connection is enabled outbound and the firewall remembers this connection and allows the return data only blocking incoming connections on that port.
因为默认情况下几乎所有防火墙都启用了端口 80 :)
Because port 80 is almost universally enabled in just about every firewall by default :)