The connection to the server is not established. Activation error. Unable to connect to server

When launching the game through Steam, I receive an error message: "Unable to connect to the digital key server."

This error most often occurs when there are problems with communication between the computer and the Steam network... You may not experience any problems browsing the sites, however, a particular bug or program may interfere with Steam.

Possible reasons

This error can occur when trying to run third-party games on Steam. The most common causes leading to this problem are listed below:

If the game was recently released or purchased during a sale

Although we try to predict as accurately as possible the demand for the game, at times we may lack the keys needed to make a purchase. This error appears when we run out of keys. You will be given a key as soon as we receive more keys from the game publishers.

Using incompatible operating systems

You may encounter a similar error when trying to launch a game or view the CD key for a game using an operating system that was not intended to launch it (for example, you are trying to launch a Windows-only game using the Steam client for Mac OS X ). You can find information about which operating systems a particular game is available for on the Steam website.

Configuring the router

For some third-party games to work correctly, it may be necessary to open additional ports on the router. We recommend the guide Using your router with Steam

Firewall (firewall)

Your firewall might be getting in the way correct work games. We recommend the following guide Using a Firewall with Steam for initial troubleshooting.

The problem arises after Steam updates

If this issue occurred immediately after a Steam update and the firewall is already disabled, please try the following:

  1. Sign out and close Steam
  2. Navigate to C: \ Program Files \ Steam (default location). If your Steam is located in a different folder, open it.
  3. Rename the "ClientRegistry.blob" file to ClientRegistryOld.blob and close the Steam folder
  4. Launch Steam and log into your account. Steam will update, recreate the required files, and then you can play
Connection problems

This error can also occur if you are currently experiencing intermittent Internet connection problems. Please check with your ISP to ensure there is no disruption to service.

Instructions

Carefully study the data that you have about this server. To establish a connection, you need to know its ip-address and the port with which the connection will be made. For most servers using the http protocol, port 80 is the default.

Other ports may be open on the server - it all depends on what services are running on it. For example, ftp - port 21, telnet - port 23, SMTP (sending mail) - 25 port, POP (receiving mail) - 110 port, etc. Many of these ports are potentially open for communication, but when trying to establish connection may require you to enter a password.

How can I find out which ports are open on the server? Use a port scanner like Nmap or XSpider to find out. You can search the net for other scanners as well. To try, enter 127.0.0.1 into the scanner and try scanning. You will receive information about the ports open on your computer.

The actual scanning process can be carried out different ways... For example, you can set specific ports for scanning to search for specific services, or you can check all ports completely. After determining which ports are open on the server, you can try to connect to them.

To connect, you need programs that work with the corresponding server services. For example, if port 21 is open, you need an ftp client. With port 23 open, you need telnet. By scanning ports, you can find those used by remote administration programs - for example, Anyplace Control, Access Remote PC, DameWare NT Utilities, RemotelyAnywhere, Radmin, VNC, etc.

Once you find an open port, you can try connecting to it. Most likely, you will be asked for a password, but sometimes administrators will not change the default one. For example, for the popular Radmin program (port 4899), the default password is 12345678 or 123456789.

There are many programs that allow you to select logins and passwords for such services, but you should know that such activities are illegal and punishable by law. Therefore, work with the ports that the server administrator permits to connect to. For example, ftp - using this protocol, you can successfully download large amounts of data, view files available for viewing. There is a good ftp client in the popular file manager Total Commander.

Network architecture is a complex system that can be prone to errors and malfunctions. Almost every active computer user has encountered the message "Server access error", be it a site not found or an application connection error.

First, make sure that communication is broken only with a specific server. Try to connect to others and view web pages in a browser. Perhaps the problem is with your internet connection, your connection settings, or an error with your ISP. Restart your computer and network devices. If necessary, contact the technical support of the company that provides you with Internet services.

One of the most frequent reasons is using the wrong address. Make sure that you enter correct name web page or IP address. They could change or cease to exist.

The reason for the inability to connect to the server may be the inability to access it for physical reasons. The computer may be turned off by hardware, be broken, or the system may have problems with the communication channel connecting the machine to the Internet.

Another reason for the lack of communication may be security policy. For one reason or another, the IP address of your computer may be blacklisted on the server, which prohibits all or some types of connections. On the other hand, there are frequent cases of reasons for denying a connection, originating from the client. Make sure that antivirus software or the network monitors of your computer or server on the corporate network are not blocking the address to which you want to connect.

If the communication is based on the use of client programs connecting to the server, check the developer site and make sure you are using latest version... Otherwise, update the program. If you are using a non-original, but server-compatible client program, then try installing other options software or the original version of the product.

Connection error may be tracing related

If a message appears on the screen while using the program "Unable to connect to server.", follow these steps:

1. Check if your computer is infected with the Kido worm

Read an article about infection symptoms and treatment How to deal with the Net-Worm.Win32.Kido network worm .

2. Check Internet Access

Check if available Internet by opening in a browser Internet Explorer site Kaspersky Labs... If access to Internet no, then contact your provider to obtain additional information... Try to activate the application again after restoring access to The Internet.

3. Configure Firewall correctly

If your computer has Firewall, then make sure that in the settings Firewall there is a permissive rule for the process avp.exe.

Firewall (firewall) designed to ensure the safety of your work in local networks and the Internet. Firewall is a software package that checks data transmitted over the Internet or local area network, and, depending on the parameters Firewall(directions, transmission protocol, destination addresses and ports), blocks or allows this network activity.

4. Check the system date on your computer

You can learn how to check if the system date is set correctly on your computer from KB3508.

5. Try to activate again in an hour

6. Contact Kaspersky Lab Technical Support

If the error appears again, we recommend that you contact the Technical Support Service. Kaspersky Labs by sending a request through the service My Kaspersky and describing the problem in detail.