电信的200M宽带，最近这几天老是连不上。报障之后，电信的工作人员来到它又一点问题都没有，郁闷死了。请哪位泡菜看看究竟是线路的问题，还是光猫的问题，还是路由的问题，谢谢！

Mar 21 12:16:50 rc_service: udhcpc 14440:notify_rc start_firewall
Mar 21 12:16:50 dhcp_client: bound 192.168.1.2 via 192.168.1.1 during 86400 seconds.
Mar 21 12:16:50 miniupnpd[13297]: shutting down MiniUPnPd
Mar 21 12:16:50 start_nat_rules: apply the nat_rules(/tmp/nat_rules_ppp0_eth0)!
Mar 21 12:16:50 custom_script: Running /jffs/scripts/nat-start
Mar 21 12:16:50 miniupnpd[14467]: HTTP listening on port 48085
Mar 21 12:16:50 miniupnpd[14467]: Listening for NAT-PMP/PCP traffic on port 5351
Mar 21 13:42:11 WAN_Connection: Ethernet link down.
Mar 21 13:42:11 stop_nat_rules: apply the redirect_rules!
Mar 21 13:42:28 WAN_Connection: WAN was restored.
Mar 21 13:42:28 start_nat_rules: apply the nat_rules(/tmp/nat_rules_ppp0_eth0)!
Mar 21 13:42:28 custom_script: Running /jffs/scripts/nat-start
Mar 21 13:43:48 WAN_Connection: Ethernet link down.
Mar 21 13:43:48 stop_nat_rules: apply the redirect_rules!
Mar 21 13:43:52 pppd[399]: Serial link appears to be disconnected.
Mar 21 13:43:52 miniupnpd[14467]: Failed to get IP for interface ppp0
Mar 21 13:43:52 miniupnpd[14467]: SendNATPMPPublicAddressChangeNotification: cannot get public IP address, stopping
Mar 21 13:43:58 pppd[399]: Connection terminated.
Mar 21 13:43:58 pppd[399]: Modem hangup
Mar 21 13:44:00 WAN_Connection: Fail to connect with some issues.
Mar 21 13:44:43 pppd[399]: Timeout waiting for PADO packets
Mar 21 13:44:43 pppd[399]: Connected to b6:39:58:1b:ff:18 via interface eth0
Mar 21 13:44:43 pppd[399]: Connect: ppp0 <--> eth0
Mar 21 13:44:46 pppd[399]: PAP authentication succeeded
Mar 21 13:44:46 pppd[399]: peer from calling number B6:39:58:1B:FF:18 authorized
Mar 21 13:44:46 miniupnpd[14467]: Failed to get IP for interface ppp0
Mar 21 13:44:46 miniupnpd[14467]: SendNATPMPPublicAddressChangeNotification: cannot get public IP address, stopping
Mar 21 13:44:46 miniupnpd[14467]: Failed to get IP for interface ppp0
Mar 21 13:44:46 miniupnpd[14467]: SendNATPMPPublicAddressChangeNotification: cannot get public IP address, stopping
Mar 21 13:44:46 miniupnpd[14467]: Failed to get IP for interface ppp0
Mar 21 13:44:46 miniupnpd[14467]: SendNATPMPPublicAddressChangeNotification: cannot get public IP address, stopping
Mar 21 13:44:46 pppd[399]: local  IP address 100.64.1.50
Mar 21 13:44:46 pppd[399]: remote IP address 100.64.0.1
Mar 21 13:44:46 pppd[399]: primary   DNS address 202.96.128.86
Mar 21 13:44:46 pppd[399]: secondary DNS address 202.96.134.133
Mar 21 13:44:46 miniupnpd[14467]: ioctl(s, SIOCGIFADDR, ...): Cannot assign requested address
Mar 21 13:44:46 miniupnpd[14467]: Failed to get IP for interface ppp0
Mar 21 13:44:46 miniupnpd[14467]: SendNATPMPPublicAddressChangeNotification: cannot get public IP address, stopping
Mar 21 13:44:46 custom_script: Running /jffs/scripts/wan-start (args: 0)
Mar 21 13:44:46 rc_service: ip-up 15820:notify_rc start_firewall
Mar 21 13:44:46 miniupnpd[14467]: shutting down MiniUPnPd
Mar 21 13:44:46 start_nat_rules: apply the nat_rules(/tmp/nat_rules_ppp0_eth0)!
Mar 21 13:44:46 custom_script: Running /jffs/scripts/nat-start
Mar 21 13:44:46 admin: start
Mar 21 13:44:47 miniupnpd[15880]: HTTP listening on port 43555
Mar 21 13:44:47 miniupnpd[15880]: Listening for NAT-PMP/PCP traffic on port 5351
Mar 21 13:44:47 rc_service: ip-up 15820:notify_rc stop_upnp
Mar 21 13:44:47 rc_service: ip-up 15820:notify_rc start_upnp
Mar 21 13:44:47 rc_service: waitting "stop_upnp" via ip-up ...
Mar 21 13:44:47 miniupnpd[15880]: shutting down MiniUPnPd
Mar 21 13:44:48 ntp: start NTP update
Mar 21 13:44:48 miniupnpd[15904]: HTTP listening on port 34008
Mar 21 13:44:48 miniupnpd[15904]: Listening for NAT-PMP/PCP traffic on port 5351
Mar 21 13:44:50 WAN_Connection: WAN was restored.
Mar 21 13:45:20 WAN_Connection: Ethernet link down.
Mar 21 13:45:20 stop_nat_rules: apply the redirect_rules!
Mar 21 13:45:32 WAN_Connection: WAN was restored.
Mar 21 13:45:32 start_nat_rules: apply the nat_rules(/tmp/nat_rules_ppp0_eth0)!
Mar 21 13:45:32 custom_script: Running /jffs/scripts/nat-start

“你的NAS想获取个公网IP，所以一直获取不到，于是就上不了网。”  

理解不能。。。

网络配置错误。电信现在是大局域网了，你想配置成获取公网IP它不给你的。只能自动获取个内网IP，然后经过它的局域网地址转换出去。
这样就达到1个公网IP给很多人用的效果。你的NAS想获取个公网IP，所以一直获取不到，于是就上不了网。

不知道啊，是那台西数的nas吧
本帖由安卓客户端发布

之前换了一台路由，故障依旧，我试试换根线，谢谢
本帖由安卓客户端发布

是不是掉线，他们后台直接可以查，只要有经常掉线现象，他们都是可以直接看到的，不必非要他们上门时出故障才算。

再一个，谁顾得上给你排查问题，修复故障，况且上门维修的也不会懂，都是全部换新了事。换接头，换光猫，换光纤，直到解决问题。