Socket errors can occur when connecting programs, including error 11004. This can be caused by firewalls, misconfigured servers, or incorrect DNS information. To fix, disable firewalls or contact the ISP to recover lost information and ensure correct server identification.
Sockets on a computer are connection points between programs. This usually occurs with two different machines, but sockets can also be used to connect one program to another. During this connection, a socket error 11004 can occur. This happens when someone needs to access a system such as an email server or website. For this error, the name is correct, but the server is not returning the correct information, then access is denied because a firewall or misconfigured server is blocking proper access.
As with all socket errors, using a firewall or antivirus software can cause socket error 11004. Firewalls are responsible for ensuring that all access to and from your computer is regulated. This means errors can occur because the firewall doesn’t grant access when it’s needed. It’s a good idea to temporarily disable any firewall or antivirus program to see if your computer can connect to the server without the error.
Most often this happens because the Domain Name Server (DNS) is not returning the correct information to the Internet Service Provider (ISP) or it thinks the computer is wrong. For the former, this means that the DNS shows the name is correct, but other information needed for access is not displayed. In the latter case, the login information may be correct, but the program shows that the computer being used is different from normal, even if it is not, and may still deny access. If the problem stems from one of these instances, contact your Internet provider and ask them to recover the lost information and repair the server.
Another reason for this problem is that the computer trying to connect to the server is using the wrong DNS. For example, you have two DNS systems, each with its own ISP. If the user tries to use the second DNS for the first ISP, it will fail or return a socket error 11004. In this case, change the DNS information to the correct ISP.
If a server name from an ISP and an internal server name are similar, this problem can also occur. If your ISP has a server called Fred and your computer has an internal server called Ed, for example, this can cause socket error 11004. This is because your computer gets confused and uses the wrong information for the wrong server. To fix this, the user must manually tell the computer which server is which.
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