> Source: [sk180845](https://support.checkpoint.com/results/sk/sk180845)

# sk180845 - VPN client fails with error "Connectivity with VPN Service is lost" after April 8, 2023

| Property | Value |
|----------|-------|
| Solution ID | sk180845 |
| Date Created | 2023-04-11 |
| Last Modified | 2023-06-23 |
| Technical Level | General |
| Products | Endpoint Security |
| Versions | Cloud, E89.X, E88.X |
| OS | Windows |

## Symptoms

- * Starting from April 8, 2023, Endpoint Security VPN client fails to start with error "Connectivity with VPN Service is lost".
* These lines can be found in `trac.log`:  
  \[ 47972 44400\]\[9 Apr 10:16:03\]\[TR_FIREWALL\] CFirewallWrapper::InitFirewallMonitor: ERROR - lpFwMonitor_Start failed, try to wait for the service initialization  
  \[ 47972 44400\]\[9 Apr 10:16:03\]\[TR_UTILS\] WaitForServiceStart("vsmon")  
  \[ 47972 44400\]\[9 Apr 10:16:03\]\[TR_UTILS\] WaitForServiceStart: OpenService("vsmon") failed: The specified service does not exist as an installed service.  
  \[ 47972 44400\]\[9 Apr 10:16:03\]\[TR_FIREWALL\] CFirewallWrapper::InitFirewallMonitor: waiting for vsmon initialization failed

## Cause

The problem occurred because the certificate that was used to sign the firewall driver, `vsdatant.sys`, had expired. As of April 8, 2023, the certificate used for code signing became invalid. This resulted in the VPN client being unable to initiate the firewall module, which lead to the error message, "Connectivity with VPN Service is lost".

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## Solution

### **Affected versions**

Endpoint Security VPN versions **E86.60** and **E86.70** .  
Only the "Endpoint Security VPN" variant of standalone VPN clients, which includes the Firewall module, is affected by this issue. Other types of standalone VPN clients and the full Harmony Endpoint Protection suite, are not affected.  

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### Mitigation

The only solution is to upgrade the VPN client to a newer version, see "Client Releases" in the [Endpoint Security Homepage](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk117536).

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