No connection could be made because the target machine actively refused it?

Question

Sometimes I get the following error while I was doing HttpWebRequest to a WebService. I copied my code below too.

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System.Net.WebException: Unable to connect         


        

Answer 1

Go to your WCF project - properties -> -> debuggers -> unmark the checkbox

Enable Edit and Continue

Answer 2

The most probable reason is a Firewall.

This article contains a set of reasons, which may be useful to you.

From the article, possible reasons could be:

• FTP server settings
• Software/Personal Firewall Settings
• Multiple Software/Personal Firewalls
• Anti-virus Software
• LSP Layer
• Router Firmware
• Computer Turned Off
• Computer Not Plugged In
• Fiddler

Answer 3

I got this error in an application that uses AppFabric. The clue was getting a DataCacheException in the stack trace. To see if this is the issue for you, run the following PowerShell command:

@("AppFabricCachingService","RemoteRegistry") | % { get-service $_ }

If either of these two services are stopped, then you will get this error.

Answer 4

it might be because of authorisation issues; that was the case for me. If you have for example: [Authorize("WriteAccess")] or [Authorize("ReadAccess")] at the top of your controller functions, try to comment them out.

Answer 5

Well, I've received this error today on Windows 8 64-bit out of the blue, for the first time, and it turns out my my.ini had been reset, and the bin/mysqld file had been deleted, among other items in the "Program Files/MySQL/MySQL Server 5.6" folder.

To fix it, I had to run the MySQL installer again, installing only the server, and copy a recent version of the my.ini file from "ProgramData/MySQL/MySQL Server 5.6", named my_2014-03-28T15-51-20.ini in my case (don't know how or why that got copied there so recently) back into "Program Files/MySQL/MySQL Server 5.6".

The only change to the system since MySQL worked was the installation of Native Instruments' Traktor 2 and a Traktor Audio 2 sound card, which really shouldn't have caused this problem, and no one else has used the system besides me. If anyone has a clue, it would be kind of you to comment to prevent this for me and anyone else who has encountered this.

Answer 6

This is really specific, but if you receive this error after trying to connect to a database using mongo, what worked for me was running mongod.exe before running mongo.exe and then the connection worked fine. Hope this helps someone.