gst emsigner error failed to establish connection

“Failed to establish a connection to the server. Kindly restart the EmSigner.” You must have encountered this error on the GST portal while filing your GST return or during DSC registration. It is called an emSigner error. 

Government services are rapidly being digitised in India to ensure quick and seamless service delivery. Filing returns is one of the first services that went paperless. When Goods and Service Tax (GST) was introduced, the government used digital platforms to make it easier for people to calculate their taxes and file their returns. 

However, while filing their returns, many users are encountering the emSigner error problem. In fact, “GST emSigner error” is one of the most searched keywords on Google in recent times. 

So, what is this problem, and how can you solve it? Read on for a detailed troubleshooting guide of the GST emSigner error.

What is GST EmSigner?

GST emSigner is a utility that helps send, track, and maintain the records of online documents. It also allows the user to archive their documents online. Once a user or a company has uploaded their documents, they can access them for secure signing. This helps a company to provide its goods and services faster. In other words, GST emSigner helps users sign digital documents. It is also used to file GST returns.

Before you install and run emSigner, you must register your DSC on the GST portal.

What are Digital Signature Certificates (DSC)?

DSCs are the documents that are uploaded on the GST emSigner. They are the digital equivalent of physical documents and certificates and are considered valid for transactions. They also help authenticate the identity of an online entity. Digital documents are signed using digital certificates.

Why Does GST EmSigner Error Occur

The GST emSigner error states, “Failed to establish a connection to the server. Kindly restart the emSigner” to the user. It can happen across all browsers (Internet Explorer, Google Chrome, Mozilla Firefox, etc.) and operating systems (Windows, iOS, etc.)

GST DSC error can occur due to many different reasons, but the basic reason is the change of port.

  • Earlier the emSigner used the 1645 ‘’ port
  • The current version uses the 1585 ‘’ port.
failed to establish a connection to the server

This error generally appears when registering or updating your DSC or filing a GST return.

How To Resolve the ‘’ Error?

As mentioned above, the emSigner error can occur in any browser or operating system. 

General Steps to Resolve GST EmSigner Error

Step 1: Uninstall the emSigner software from your system.

  • Go to the Start Menu
  • Select Control Panel
  • Go to Adjust Your Computer Settings
  • Go to Programs and select Uninstall a Program
  • Select the emSigner application and right-click on it
  • Press uninstall

Step 2: Once you uninstall the old version of the emSigner, you need to:

  • Go to
  • Go to the Goods and Service Tax (GST) home page
  • Click on the help and taxpayer facilities tab and select System Requirements
  • Select “Downloading and Installing the Web Socket Installer”
  • Download the Web Stock emSigner from the portal 
  • Open the downloaded emSigner.msi file
  • You will get a setup box for emSigner setup
  • Click Next
  • Choose the folder where you want to download all the files and folders related to emSigner
  • Click Next
  • Your application is ready to install
  • Once your installation is done, click on Finish.

Step 3: Run the emSigner application.

  • You will get an emSignerGSTN icon on your desktop screen
  • Right-click on the icon and select Run as administrator
  • You will get a message saying that the emSigner service has started. Click OK
  • The Digital Signature Signer Window will then open on your system

Step 4: Restart your computer after the application is successfully installed on it. Open the emSigner software to check whether or not it is running properly.

You can also update your internet browser to the latest version to stay up-to-date with the latest changes.

Steps to Resolve GST EmSigner Error on Internet Explorer

The general solution works most of the time, but sometimes, the error might occur due to a particular internet browser. 

If you are using Internet Explorer, you can follow these steps to solve the GST emSigner error or DSC error while uploading your DSCs or filing GST returns.

  • Open the Microsoft website
  • Install/update Internet Explorer to the latest version from the website 
  • Go to and update JavaScript to the latest version
  • Next, select Control Panel on Start Menu
  • Go to Programs and click on Java
  • Select Security, click on Edit Site List, and add ‘’ 
  • Uninstall the emSigner from the Control Panel (Start Menu 🡪 Control Panel 🡪 Adjust Your Computer Settings 🡪 Programs 🡪 Uninstall Program 🡪 Select emSigner, right-click, and select Uninstall)
  • Install the latest version of the emSigner from 
  • If you have a previously installed GST emSigner, check if it works. Go to the bottom right on your desktop screen and click on Show Hidden Icons. If you can see the icon there, it means the emSigner is running properly
  • Restart the computer and right-click on the icon to run as administration

These steps are only for Internet Explorer and do not work for other browsers. 

 Steps to Resolve GST EmSigner Error on Google Chrome

Follow these steps to solve DSC errors in the Google Chrome browser.

  • Install the latest version of Google Chrome and upgrade Java to the newest version
  • Open Google Chrome and click on the three dots on the top right of the screen.
  • Select Settings
  • Under the ‘Privacy and Security tab, go to ‘Site Settings.’
  • Go to the ‘Content’ section and select ‘JavaScript.’ 
  • Go to the ‘Allowed to use JavaScript’ section and type in the following URLs by clicking the ‘Add’ button.
  • Close the ‘Settings’ window
  • Go to the Start Menu and open Command Prompt by right-clicking and selecting ‘Window Terminal (Administrator)’
  • On the command screen, type

‘netsh interface portproxy add v4tov4 listenport=1645 listenaddress=

connectport=1585 connectaddress=’

  • Press Enter
  • Open a new Google Chrome window and enter ‘’
  • Click on ‘Proceed to’ and wait for 15 seconds
  • If the Digital Signature pen drive is plugged in already, unplug it and plug it in again.
  • Open the GST Portal and register and update the DSC or file your GST returns.

These steps work for Google Chrome only and not for other browsers.

Resolve GST EmSigner Error on Mozilla Firefox

If you get a DSC error on Firefox, follow these steps to resolve the issue.

  • Install the latest version of Firefox and update Java to the newest version
  • Go to ‘Control Panel’ on the Start Menu
  • Go to ‘Programs’ and select Java
  • Select ‘Security, then click on ‘Edit Site List’ and add
  • Uninstall the previous version of emSigner from the Control Panel and install the latest version
  • Check the emSigner to see if it runs by clicking on ‘Show Hidden Icons’ on the bottom right of your desktop screen
  • Restart your computer
  • Right-click on the emSigner icon and select ‘Run as administrator.’
  • Make sure your Digital Signature Certificate (DSC) is uploaded onto a USB drive
  • Open Firefox and select ‘Tools’
  • Go to ‘Options’ and click on the ‘Privacy and Security’ tab
  • Type ‘’ on the address bar of Firefox. You will get an error message
  • Click on ‘Advanced’ on the error screen
  • You will get two options
    • Go back to safety
    • Accept the risk and continue
  • Click on ‘Accept the Risk and Continue’ and wait for 15 seconds
  • Close the tab
  • If you don’t get the error screen, press Ctrl+Shift+Del on your keyboard
  • Select ‘Appropriate Site Preference’ and then ‘Clear Now’
  • Type the URL again in the address bar and try the steps again
  • If you still do not get the error screen and see the same ‘Failed to establish the connection to the server. Restart the Emsigner’ error, open the ‘Privacy and Security’ tab in ‘Options’
  • Remove the selection from the box in front of ‘Block dangerous and deceptive content’ and try again

Following these steps on Mozilla Firefox will help you address the DSC error or GST emSigner error.

How to Register DSC?

Once your emSigner is running well, you can follow these steps to register or update your DSC. You must, however, make sure that your DSC is linked to your PAN card because Aadhar-linked DSC doesn’t work for GST.

  • Open the Goods and Services Tax (GST) website 
  • On the upper right of the screen, click on the arrow beside your profile name
  • Select ‘Register/Update DSC’
  • You will be directed to another page asking for the PAN of the Authorized Signatory. You will have to enter a person as an authorised signatory in your GST registration to have them on your list
  • Select the proper name and check the box next to ‘I have downloaded and installed the signer’
  • Click on ‘Proceed’
  • Select your name on the table that appears and click on ‘Sign’

Resolving the Error

If you have already installed the emSigner, updated the Java version, installed your DSC stick, and are yet getting the error, proceed with the following steps. If you have not installed and updated them, follow the steps given above to install them.

  • Plugin the DSC stick in your computer
  • Make sure the emSigner is running by right-clicking on the bottom right of your desktop screen and selecting ‘Show Hidden Icons.’ If the emSigner icon is present, it means it is running
  • Open your browser
  • Write in the address bar and press Enter
  • Select the Advanced tab
  • Click on ‘Proceed to
  • Wait for 15 seconds and retry
  • If you do not get a warning screen, press Ctrl+Shift+Del to clear site preferences and retry

These steps work on Google Chrome perfectly. Make sure you enter the address https: correctly in the address bar. Remember to uninstall the previously installed emSigner before installing the latest version.

Digital Signature Certificate (DSC) Installation When DSC Error Occurs

emsigner digital signature certificate missing

If you get the “Sorry! Digital Signature Certificate Missing. Please plugin the token & click on process to proceed with signing” when you are uploading your DSCs, you will need to follow the steps mentioned below.

You will see this error if you are using a DSC stick for the first time on your computer. You will need a setup for a DSC pen drive.

  • Plugin the DSC stick into your computer
  • Open My Computer 🡪 Double click on the drive letter with inserted DSC
  • Open setup file (the .exe file other than the autorun.exe file)
  • Run setup
  • Set the Choose CSP option as ‘Private CSP’
  • Complete the installation
  • You will get a message asking “Do you want to install this certificate?” Click Yes

You need to follow these instructions to check your DSC:

  • Open Internet Explorer 
  • Go to ‘Internet Options’ and select the Content tab
  • Click the ‘Certificates’ button
  • Select your DSC and click ‘View’
  • Click on the Details tab of your DSC
  • Scroll down to ‘Key Usage’
  • Your DSC should say “Digital Signature, Non-Repudiation.” If it says “Key Encipherment,” remove the DSC from the Windows store

Solving the ‘Unable to Connect’ Error

If you get the error “Unable to connect to the installed EMSigner. Please close any other application running on the following ports 1585, 2095, 2568, 2868, 4587 and restart your system, and try again,” it means there is no port for the emSigner to connect. Freeing a port can make it run.

 To check which applications are using the above ports, follow these steps:

  • Uninstall the emSigner software and reinstall it
  • Check if it is running. Sometimes uninstalling and reinstalling solves the problem.
  • If not, go to the Start Menu 🡪 All Programs 🡪 Accessories 🡪 System Tools 🡪 Resource Monitor
  • Click on the Network tab and select Listening Port
  • You will get a list of applications running and the ports engaged
  • Check if 1585 is on the list
  • If it is in the list, check the file name or note the application’s PID number.
  • Locate the file name or PID number in the Overview tab
  • Right-click on the file name and click End Process
  • Install or restart the emSigner and try again

Solving WebSocket Error in Mozilla Firefox

While other internet browsers add exceptions automatically, Mozilla Firefox needs manual intervention in adding the root certificate. These are the steps you will need to follow:

  • Enter the URL in the address bar
  • Press Enter
  • You will be prompted to add the certificate to the Exception Site list
  • Click on the ‘Add Exception’ button
  • Check the port on which the server is running and ensure that the port number of the server and the emSigner is the same
websocket error in mozilla firefox
  • Go to Control Panel and select Program and Features to check the version of the emSigner
  • If the emSigner version is 1.2, you will have to uninstall the previous one and install the latest version of emSigner
  • Enter the URL in the address bar again
  • Click the Advanced button
  • Click the Add Exception button
  • Select ‘Confirm Security Exception’

Installing the WebSocket Installer on MacOS

If you have an Apple machine, you will have to follow these steps to install the WebSocket installer.

  • Download WebSocket Installer for macOS
  • Unzip the downloaded folder
  • Open shell script and go to the downloaded folder
  • Type ./ and execute
  • If the emSigner has started successfully, you will get a success message. Click OK
  • The emSigner icon will appear on the taskbar and you can see the status of the server.


The introduction of GST meant that the old taxation system was removed. This inconvenienced the business owners for a while as they were unfamiliar with the new system. Small businesses, especially, faced more problems as they could not afford expensive GST billing software to track their transactions.

However, applications like emSigner have made life easy for business owners. Now, they do not have to worry about maintaining a paper trail for every transaction. Activities like registering and updating DSCs or filing GST returns have become very easy.

As with any software, you might encounter problems while running the emSigner too. However, with the above steps, you should be able to overcome these problems easily.

FAQs on GST emSigner Error

If I see ‘Error! Failed to establish the connection to the server. Kindly restart the emSigner’ Click here to troubleshoot, how should I proceed further?

First, check if the emSigner is running by right-clicking on the bottom right of the desktop screen and selecting Show Hidden Icons. If the icon is visible, emSigner is running.
- If emSigner is running – Stop the server and restart the emSigner server by right-clicking on the icon and selecting Run as administrator.
- If emSigner is not running – Right-click on the emSigner icon and run the program by selecting Run as administrator.
Above are solutions mentioned for different internet browsers like Internet Explorer, Google Chrome, and Mozilla Firefox.

Why is DSC not working on GST?

If you face this problem, you need to check if the emSigner is running on your computer. You can also uninstall and reinstall the emSigner.

How will I know if DSC is working or not?

The validity of a DSC is mentioned on the certificate itself. Therefore, you can view your certificate to check its validity.

Is it mandatory to restart the system after the installation process?

Yes, it is mandatory to restart the system after the installation process for the emSigner to work properly.

Can I make changes in DSC on the GST portal?

Yes, you can make changes to your DSC on the GST portal.

How to register DSC on the GST portal?

You need to follow these steps:
- Open the GST website.
- Click on the arrow near your profile name on the top right side of the screen.
- Select Register/Update DSC.
- Select your name and finish the procedure.

How do I activate GST on EmSigner?

You need to follow these instructions:
- Install emSigner for GST
- Upload valid DSC and register it
- Open emSigner from your computer
- Your GST DSC is activated on emSigner

Why do I get the error ‘Sorry, no valid digital signatures found. Please try again?’

If you get this error, check if DSC is installed or DSC stick is plugged in your system. If it is properly plugged in, check if the DSC is valid. Sometimes, this error may show up if your DSC’s validity has expired.

What to select for advanced unsafe option?

Click on the “Accept the Risk and Continue” button.

Read more:

How to File Nil GST ReturnWorks Contract Under GSTGST Registration Limit
GST RulesKerala GSTGST Exemption Limit
GST Registration StatusIGSTGST Emsigner Error Failed to Establish Connection to The Server
GST Compliance RatingCGST ActGST Council
GST Compensation CessCement GST RateGST Audit
Export of Services Under GSTComposition Scheme Under GSTFeatures of GST

Categories: GST