Connect to the router a lot of pages can't open

Connect to the router a lot of pages can not open. This is what I experienced, but also bothered me for several months of the problem, today may be counted for me to solve.

The fault is such, can QQ but can not enter QQ game, can open other general Web pages, but only Sina Ah, Sohu, NetEase and so on, these large-scale portal site cannot open. What is the reason? Think of many ways to start thinking is a router problem, restore factory settings after the is not good, changed a new or so, later thought is a cat problem, with others borrowed a cat or not, and later more is the link between the cat and the router of the various wiring problems, finally I put him all replaced, Halo Oh, or so, IP and DNS are completely set up correctly is not good, the system changed a new, alone with the cat is nothing (to show the line and the cat is no problem) so in the end the problem is where? I am engaged in computer maintenance, to be honest, in the face of this situation, it is really baffled, can't think of why.

I am a CRC user, checked on the internet, most of the users agree that the CRC restricted the route of the edge solid, today to think about feeling a bit wrong, why limit my router, I can afford QQ and some of the Web pages I can normally play open. This is not reasonable, if you want to limit your route, why simply do not over boots, so that you can not use anything better. On the internet to check a lot of information later met an expert hehe help me solve the problem.

Open 192.168.1.1 on the browser enter the user name and password into the router settings

Here we point the Wah port setting in the network parameter.

Here we select the advanced settings.

Change the packet mtu:1492 that number to 1480 and save it.

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