What if Skype doesn't connect?

What if Skype doesn't connect? Skype is a number of netizens are using a network phone, to provide users with a number of interesting features, such as: The Chinese language of real-time translation function is the favorite of many Skype dead faithful powder. However, some Skype users recently reported that Skype could not log in, prompting that Skype could not be connected (pictured below). Next, let's take a look at Skype's inability to connect to the solution to this problem!

Skype cannot connect

1. According to past experience, the Skype version is too old to cause landing, forcing users to upgrade. I thought this was the same as last time, the upgrade client can solve the problem. It turned out to be different from what I thought, and the Skype versions of these users were almost always up to date.

2. Or based on past experience, there has been a client's Skype connection settings that were changed to prevent the connection. From this point of view, try to copy the other normal landing software configuration to the software can not log on. Still does not solve the problem.

3. Past experience is ineffective. Can only be a step by step wrong. My idea is this: in the same network environment, only 1/20 of users Skype can not log in. The three-tier network, routing, and firewall restriction issues can be excluded for the time being. (Do not rule out a firewall on a single IP limit, but the odds are very small, first regardless of him). Skype can not log on the user, the network is through, so it is also possible to exclude the two-tier exchange and a layer of physical connectivity problems. Then there are only two possible problems: 1. Local Software settings or the software itself is wrong. 2.Skype account problem.

It stands to reason that two questions should be the first to be thought of, because it is more common and reasonable. But here I was misled by the user, saying that his account could be logged on at home on his computer and mobile. So in the beginning I was careless to exclude the account problem.

4. In order to find the root of the problem, I did a simple test. For the sake of narration, here with a on behalf of Skype can not log users, B represents a normal access to Skype users---1. First use B's account in A's computer landing, landing success. Note that the Skype software on a computer itself is not a problem. 2. Use A's account to log on B's computer, "Unable to connect". ---this is basically a matter of account.

5. Click on the Skype login interface "Unable to access your account", as prompted next step next. User login successful after completion.

The software problem is solved, but there are two questions in my mind that have not been solved.

1. Why is the account of the problem in the home and mobile phone can be landed on it?

2. Why are several users having problems at the same time?

Guess:

1. IP address (the company's network exports abroad). We know that QQ software has a remote landing, when the remote landing QQ will prompt you to enter the verification code, and even through the SMS verification. Skype has a similar strategy. Users frequently log in at home and in the company, and in the view of the Skype server, this account frequently lands alternately at home and abroad. I think Skype may be the IP address of our company as a suspicious IP prohibit landing. Therefore, the user can not log in, and after the verification of the normal landing.