How to Fix: io.netty.channel.abstractchannel$annotatedconnectexception

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 The "io.netty.channel.abstractchannel$annotatedconnectexception: Connection refused: no further information" error well is synonymous to dissatisfaction on the part of many Minecraft players. This error message pops up when you are trying to connect to a Minecraft server and some problems are encountered.

If you're seeing this message, that means your Minecraft client isn't talking properly to the server. It could be due to issues with the server or with your network. For Netty, this is done through the class "AbstractChannel", while "AnnotatedConnectException" means there was an error in connecting to the server.

It happens for many reasons. A server is down for maintenance, an IP or port was wrongly configured, Windows Firewall prevents the connection, Java versions are too old and conflicting with one another; software incompatibility of the device. 

Let's discuss how to fix this.

1. Power-Cycle your Network

Power cycling of networking equipment will often clear temporary networks. If you are having trouble connecting to your Minecraft server, you might want to restart your modem and router. This will clear up any routing mistakes, conflicts with dynamic IP addresses, or other network anomalies.  

Turn the power supply to the network router off.Pull the power cord  

After 5 minutes, plug the power back in.

Try reconnecting to the server when you get internet access to see if the error still persists.

2. Reset your Network Settings

If you are unable to connect to the server, reset your network configuration. This should clear any incorrect or outdated options. This method can help in solving connection issues in Minecraft related to wrong DNS settings or IP addresses.

Search for the Command Prompt from the Windows' Search bar and open it. Run Bash Shell 

Write each command in turn: netsh winsock reset, ipconfig/release, ipconfig/renew, flushdns input-str ip reset 

Reboot your computer to check whether the issue still persists.

3. Add Exception in Firewall

You need to check if your firewall doesn't block Minecraft in advance to trying to connect. Also, you are allowed to enable the exception in your firewall with a directory of game and Java files, so your firewall will not accidentally ban Minecraft network traffic. This way, you can be certain that the firewall isn't blocking the data exchange between your client and server.

Click the Start menu icon and click the Settings icon.  

In the Settings., click Updates & Security.

In the left part of the window, you should see Windows Security; click that, then click Firewall & Network Protection.

Scroll down and click Allow an App through Firewall.

When a warning pops up, click Change Settings and then select Yes.

After clicking on the options, click on Allow another app.  

Browse to the installation folder of the game and its launcher executables.  

Now, go back to the folder where you've installed Minecraft servers and do the same.  

Open the Maxwell folder, then go into the MinecraftServer folder.  

Let the two Java executables in the folder be allowed on an equal basis.

Instead of clicking on Allow another app, scroll down through the apps list and turn on all the options for Java Platform SE Binary for both private and public networks. Now click on OK.Apps that require firewall authorization 

Run Minecraft now and try to join the server to see if the issue persists.Approval for firewall-based application

4. Add the IP address and Port Before Connecting

You might experience some disconnections if you have a dynamic IP address that keeps changing. Then, make sure you are connecting to the correct server by verifying the IP address and port before you add them into the Minecraft Launcher. 

Open the Command Prompt by searching for it in the search box at the Windows toolbar.

Right-click on the icon and run it as an administrator. In the context menu of the Command Prompt icon, select "Run as Administrator". In the opening window of the Command Prompt, write the command "ipconfig." Using "ipconfig" to Find "IPv4 Address" When you are in the command prompt, simply type in "ipconfig."

The "Minecraft Servers folder > Maxwell-some random numbers > MinecraftServer" folder contains a text document entitled "Server Properties". Open it. Opening the "Server Properties" text document, note the server port

Note the "Server Port" mentioned. It was "25565" for us. In most circumstances, it should be comparable, but there are a couple of instances where it could be different.

First of all, click on "Play Multiplayer" in the Minecraft main menu. After you clicked into the server you want to join click on "Edit". You can also access the page of the server and then click on the "Edit" button.

The "Address" field should include the IPv4 address and port number that we documented, but the server name may be your own. A sample could be "XXX.XXX.X.X:25565,", where "25565" is the port number, which may be different.Revise Server's URL and click the "Done" button

If, after clicking "Done" and "Refresh," the issue is still there, try again.

5. Check for Port Filtering

The process of port filtering involves the blocking of your firewall or router access to certain ports that Minecraft servers use. To fix the error, you can check and modify the settings of your ports, in order to open up the right type of traffic.

Here, you can check if the port filtering is not turned on and that it is on the right ports according to your network specifics provided by both your router and local machine.

Fix 6. ISP Network Access

If all of the above remedies are hopeless, your internet service provider's network access is what you try next. Sometimes, the ISP itself will block access to a particular domain and won't get you through. Check with your Internet Service Provider to make sure that the connection actually is not banned.

You can also try to use your mobile's 3G internet access and replace it with your usual internet connection. In this case, you might have to start using any other network because your internet service provider itself is blocking you from accessing the internet.

It seems the DNS used by your ISP doesn't allow Minecraft to connect to the mobile data network. When this is the case, then a call to the internet service provider will fix the error.

That is all about How to Fix: io.netty.channel.abstractchannel$annotatedconnectexception, and we really hope that we could help as much as possible.