Whenever the Anyconnect client fails to create a connection between your computer and the VPN server, you will receive the message “Anyconnect could not establish a connection.”
Assume you have some familiarity with networks, security, and protocol design. If that’s the case, you’ll be able to gather additional useful information by examining where Anyconnect ran into problems during the initialization and connection procedure.
There is no apparent correlation between the user’s settings, ISP, or operating system and the occurrence of this problem, leaving even Cisco’s support team without a rapid remedy.
Most of the reasons for this problem can be grouped into three broad categories:
- One of the computer’s anti-virus or firewall programmes is blocking Anyconnect from connecting to the network.
- The Anyconnect client is not properly configured.
- The network or Internet service provider (ISP) has imposed some restrictions on what can be transmitted.
As a result, you can resolve the issue by removing each category one by one. Let’s begin with the most important things first.
- 1 Removing a Firewall or Antivirus Software
- 2 Disable Internet Connection Sharing Services that Conflict With Each Other.
- 3 Change the Local Laws and Regulations
- 4 Change the Value of BypassDownloader>true/BypassDownloader> in AnyConnectLocalPolicy.xml.
- 5 In AnyConnect VPN, Stick to the One Network.
- 6 Update the AnyConnect Client.
- 7 A Different Connection May be the Answer.
- 8 Summary
Removing a Firewall or Antivirus Software
There are many functionalities that can be restricted or blocked by a third-party antivirus product. You should be extra cautious after updates, when the application is still learning which behaviours on your machine may be hazardous.
Disable your antivirus software for a short period of time and then try to connect again. It is possible that a Windows firewall is to blame if you don’t use third-party antivirus software, but this is less likely. To turn off the Windows Firewall, navigate to the following location:
Disable Internet Connection Sharing Services that Conflict With Each Other.
Connectivity issues have been traced back to a disagreement between the Windows built-in service and Anyconnect’s client, according to some customers. They were able to fix the issue by briefly stopping the service, then connecting to Anyconnect, and then reactivating the service.
Using the Win + R keys, type “services.msc” into the bar and hit Enter. Press the Enter key on your keyboard. Once you’ve found the service you’re looking for, simply type it into the search bar. Select “Stop” from the context menu of the right-clicked object. Close the window and see if you can connect.
Change the Local Laws and Regulations
In the majority of cases, amending the local policy resolved the issue. There were no issues with Anyconnect after they momentarily updated a file and connected to the server before changing it back.
In the C:ProgramDataCiscoCisco AnyConnect Secure Mobility Client folder,
Change the Value of BypassDownloader>true/BypassDownloader> in AnyConnectLocalPolicy.xml.
Open the same xml file you used to connect to the server and set the value back to false.
Internet connection sharing can be enabled by following these steps: (ICS)
It’s as simple as clicking on a programme in the Control Panel’s left-click menu and selecting “disable this sharing.”
Change adapter settings can be found by opening Network and Internet Sharing and then selecting that option.
In the context menu that appears, select Properties and then Right-Click on the shared network connection.
Click on Sharing in the properties window.
To prevent other network users from connecting through your Internet connection, uncheck the box next to “Allow other network users to connect.”
Right-click to accept.
In AnyConnect VPN, Stick to the One Network.
Your PC may be experiencing connectivity issues if it is receiving signals from numerous AP’s and switching between them to find the strongest. Make sure the Anyconnect client stays on the current network in order to avoid this.
Simply open the AnyConnect client, select Network from the context menu, and then click the on button.
“Only connect to your current network.”
Update the AnyConnect Client.
Check with your network administrator to determine if your client software is up to current. If you don’t maintain your client up to date, you’ll miss out on a lot of fixes for known bugs.
A Different Connection May be the Answer.
Experiment with various wireless networks or mobile data to rule out the chance that your network or ISP has imposed restrictions on the types of connections and protocols that can pass through.
Even if you’re working from home and using Anyconnect, you may be concerned if it can’t establish a connection to a designated secure gateway. The good news is that there are a few ways to fix this issue. First, disable any antivirus software that may be interfering with your internet connection.