推荐回答（3个）
路由器WAN口状态IP为0，是因为路由器的连接或者设置上有问题。有可能是路由器与猫、光猫之间的连接不正确引起的；也有可能是路由器上的相关设置不正确引起的；也有可能是宽带运营商的问题。
一、正确连接路由器：
1、电话线上网：请准备2根较短的网线，一根网线用来连接ADSL Modem(猫)与路由器的WAN接口；另一根网线用来连接路由器上LAN(1、2、3、4)口中的一个与计算机。
2、光钎上网：请准备2根网线，一根网线用来连接光猫与路由器的WAN接口；另一根网线用来连接路由器上LAN(1、2、3、4)口中的一个与计算机。
3、网线入户上网：请准备1根网线，先把宽带运营商提供的入户网线插在路由器的WAN接口；再把自己准备的网线，一头连接计算机，另一头连接到路由器上LAN(1、2、3、4)口中的一个。
二、正确设置路由器：
1、选择正确的上网方式：在路由器的“网络参数”——>“WAN口设置”——>“WAN口连接类型”选项下，可以看到有动态IP（有的路由器上叫做自动获得IP、DHCP）、静态IP（有的路由器上叫做：固定IP）、PPPoE（有的路由器上叫做：ADSL拨号、宽带拨号）。
2、正确设置上网：
（1）、如果是PPPoE上网，那么需要填写正确的宽带帐号、宽带密码。不少用户在这里把宽带帐号和密码弄错了，导致路由器WAN口状态IP全是0。
（2）、如果是动态IP上网，则无需其它的设置， 只需要选择动态IP，然后保存一下即可。
（3）、如果是静态IP上网，则用户需要填写正确的IP地址、子网掩码、网关、DNS服务器地址。也就是未使用路由器时，电脑本地连接中使用的。
你这个很明显是Wan口没有连接啊， 就是网线没有插在Wan口上面。或者网线坏了。
你可以把网线拔下来直接插在电脑上，用账号密码看能上网不。
如果电脑都不行，那就是网线的问题，或者你们小区设备的问题，要给电信打电话。
如果电脑能上，你就进路由器，设置PPPOE拨号，账户名和密码，然后连接就好了
你电脑在原来没路由器上网的情况下接的那个网线没接路由器的WAN口的啊。
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