我的
电脑443端口关了，如何打开这个端口？希望详细一点，一步一步要做什么的
1、首先我们找到控制面板界面。
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2、找到windows防火墙。
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3、然后我们在界面里选择高级设置选项。
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4、在入站规则中，选择新建规则。
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5、然后在界面里弹出新建规则向导，我们在界面里选择端口。
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6、然后我们在界面里选择tcp，接着在特定本地端口输入443。
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7、然后我们在界面里选择允许链接。
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8、然后我们在界面里设置哪个防火墙要应用这个规则。
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9、然后我们在界面里输入一个名称点完成即可。
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用于
银行业务的，应该是https网页吧,不光是防火墙里开443端口的问题,关于https打不开可以参考以下方法:(注意是XP系统)
第一步:在IE中行则选择“工具→Internet选项”，切换到“高级”标签，勾选“使用SSL 2.0”和“使用SSL 3.0”两项。切换到“安全”标签，单击“自定义级别”按钮，确保“显示混合内容”一项为“启用”或“提示”。
第二步:运行“services.msc”命令打开服务
管理窗口，找到一项名为“HTTPSLL”的服务，确保将其设置为“自动”或者“手动”。
第三步:利用防火墙软件或者第三方工具查看本机开放的端口中443 是否祥带棚被关闭。HTTPS页面需要通过这个端口来互访，如果443端口被关闭，请设置开放该端口或者与局域网管理谨则员联系.
因此,除了防火墙之外还要看你的第一和第二步里设置是否和上面说的一样.