How to Fix Dota 2 Error Code 105: Cannot Connect to Server

Fix Dota 2 Error Code 105: Cannot Connect to Server – Dota 2 is a multiplayer video game developed by Valve Corporation. Dota 2 is one of the most popular and widely played video games these days.

Recently, many Dota 2 players reported having experienced error code 105. While launching the game, they were getting an error message: “Error Code 105 ‘Unable to Connect to the Server. Server may be offline or you may not be connected to the Internet “.

In this article, we are going to give the root cause and methods to fix Dota 2 error code 105. By the end of this article, you will be able to fix Dota 2 error code 105 and enjoy your game.

What Causes Dota 2 Error Code 105

Whenever you have any Antivirus application on your system, it may detect dota2.exe as Trojan and doesn’t allow it to open. Also, if you have your firewall open, it can also interfere with launching dota2.exe. So, to fix Dota 2 error code 105, you can do the following:

  1. Remove dota2.exe from your antivirus’ block list.
  2. Turn off your Windows Firewall.

In the next section, we have given a step-by-step guide to fix Dota 2 error code 105. Go through the next section to get rid of Dota 2 error code 105.


Here, we are going to provide two methods to fix Dota 2 error code 105. You can choose any one of them, as applicable for you.

METHOD 1: Remove dota2.exe from Antivirus’ Blocklist

In this method, we are taking Norton as an example. Different antivirus can have different steps, so you can change them accordingly. However, Norton users can follow the same steps.

  • Start Norton antivirus.
  • Click Firewall on Norton Internet Security.
  • In the left pane, Click Firewall.
  • Click Configure under Application Blocking tab.
  • Select dota2.exe.
  • Click Remove.

After implementing these steps, try to launch dota 2 on your system and check if the error still persists. If you are still facing the same issue, you can implement the following steps too:

  • Go to Norton settings.
  • Find Smart Firewall.
  • Select dota2.exe and unblock it.


Now again launch dota 2 and check if the error code 105 still persists. Hopefully you would not be getting this error now.


  • Open Control Panel. 
  • Click on System and Security tab.


  • Click on Windows Firewall.


  • On the left pane, click Turn Windows Firewall on or off.


fix dota 2 error code 105

  • Now select Turn Off Windows Firewall. 


After implementing these steps, check if the error code 105 still persists. Hopefully, you will not be getting any error now while launching dota 2.

So these were the two methods to fix Dota 2 error code 105. In case you find yourself into trouble while going through the methods mentioned above, feel free to ask via comments. We are always happy to help you.

Abdullah is the founder of GamerAfter. He is passionate about blogging and wants to share knowledge with others. His passion, dedication, and quick decision-making quality make him stand from others.

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