Solution for login failures such as email and QQ when using tengda W311R Wireless Router

Some people may encounter problems when using the W311R wireless router: the Internet is normal, but the mailbox and QQ cannot log on, some online games cannot play, and the Forum does not display verification codes. Generally, you can solve the problem from the following aspects:
1. Upgrade the tengda vro version to check whether the system version of The tengda vro is a national version. If not, for example, the system version of the network Vanguard, you can try to upgrade the tengda vro version to the national version, generally, firmware downloads are available on the tengda official website. Log on to the vro Management Interface (192.168.0.1), expand system tools-software upgrade, and then perform upgrade operations on the page. Click Browse to select the upgrade package to be upgraded, click the Upgrade button.

2. Change the MTU value of the WAN port of the tengda router www.2cto.com to change the MTU value of the WAN port of the tengda router. By default, the mtu value of the tengda router is 1492, you can try to change to 1450, 1400, and so on. Note that the MTU value can be changed only when the access mode is PPPOE. Log on to the tengda vro Management Interface (192.168.0.1), expand advanced settings-WAN port settings, and change MTU from 1492 to 1450 and 1400.

3. Set the customer's computer to the DMZ host to log on to the Management Interface (192.168.0.1) of the tengda router, expand the virtual server-DMZ host in sequence, and then set it in the setting options, enter the IP address of the DMZ host in the box behind the DMZ Host IP address, tick the box before enabling, and click Save.

To sum up, it can basically solve problems such as mailbox and QQ login failure, and hope to be useful to everyone.
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