Relay – [E] (SenderSsl) Could not establish SSL connection: errno 0 – No error
Introduction
This error (Could not establish SSL connection: errno 0 – No error) occurs when the Relay service is unable to transmit device data to the CIQ ITAM cloud due to a firewall blockage in the environment.
Open the Control Center and check the Relay logs for the error message:"C:\Program Files (x86)\Automatos\Desktop Agent\adacontrol.exe"
![image 94 Relay - [E] (SenderSsl) Could not establish SSL connection: errno 0 - No error](https://docs.almaden.app/wp-content/uploads/2025/05/image-94.png)
Explanation
Corporate environments are highly controlled, and application communications that transmit data to external servers require address and port allowances for that traffic to occur.
Tests
Testing Communication Using Telnet on Windows
Prerequisites
- The Telnet feature must be enabled on Windows. To do this:
- Open Control Panel > Programs and Features > Turn Windows features on or off.
- Check the Telnet Client option and click OK.
How to Test Communication
- Open Command Prompt (CMD) as Administrator.
- Type the following command to test communication with the first server: cmdCopyEdit
telnet lad1-receiver.almaden.app 443
- To test the second server, type: cmdCopyEdit
telnet lad2-receiver.almaden.app 443
Expected Result on a Successful Connection
If the connection is successful, the screen will remain blank with the cursor blinking at the top left corner, as shown in the image below:
Example of a successful connection:
This indicates that port 443 is open, and the server is accepting connections.
Connection Failure Result
If the connection fails, you will see a message like this:
Connecting to lad1-receiver.almaden.app...Could not open connection to the host, on port 443: Connection failed
Notes
Telnet does not show a success message, just a blank screen.
Fix
To identify which server your account is hosted on, access the CIQ ITAM Portal and check the server displayed in the upper right corner.
Request internal authorization for the address and port used by our application:
Permissions for agent communication in LAD1
![image 95 Relay - [E] (SenderSsl) Could not establish SSL connection: errno 0 - No error](https://docs.almaden.app/wp-content/uploads/2025/05/image-95.png)
Address: lad1-receiver.almaden.app
Port: 443
For plugin permissions and remote distribution in LAD1, see the full documentation.
Permissions for agent communication in LAD2
![image 96 Relay - [E] (SenderSsl) Could not establish SSL connection: errno 0 - No error](https://docs.almaden.app/wp-content/uploads/2025/05/image-96.png)
Address: lad2-receiver.almaden.app
Port: 443
For plugin permissions and remote distribution in LAD2, see the full documentation.
Log Files
If the issue persists after allowing communication with our addresses, attach the log files indicated in the documentation from the links below:
If you still need support after following all the instructions, collect the logs and open a case at https://support.almaden.ai/ with evidence of the reported issue.