Event ID - 18

Event Id18
SourceMicrosoft-Windows-RasSstp
DescriptionThe Secure Socket Tunneling Protocol service either could not read the SHA256 certificate hash from the registry or the data is invalid. To be valid, the SHA256 certificate hash must be of type REG_BINARY and 32 bytes in length. SSTP might not be able to retrieve the value from the registry due to some other system failure. The detailed error message is provided below. SSTP connections will not be accepted on this server. Correct the problem and try again. %1
Event Information According to Microsoft :

Cause :

This event is logged when the Secure Socket Tunneling Protocol service either could not read the SHA256 certificate hash from the registry or the data is invalid.

Resolution :

Modify value data for SHA256CertificateHash registry parameter

Open the Registry Editor and check the values of the following registry key:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\SstpSvc\Parameters\SHA256CertificateHash

Check that the System account has read/write permission for each registry key. To check the permissions:
  1. Right-click each registry key, and then click Permissions .
  2. If the System account does not have read/write permissions for the key, add them.
  3. Right-click the SHA256CertificateHash registry parameter, click Modify , type 32 , and then click OK .
Verify :

To verify that the remote access server can accept connections, establish a remote access connection from a client computer.

To create a VPN connection:
  1. Click Start , and then click Control Panel .
  2. Click Network and Internet , click Network and Sharing Center , and then click Set up a connection or network .
  3. Click Connect to a workplace , and then click Next .
  4. Complete the steps in the Connect to a Workplace wizard.
To connect to a remote access server:
  1. In Network and Sharing Center, click Manage network connections .
  2. Double-click the VPN connection, and then click Connect .
  3. Verify that the connection was established successfully.
Reference LinksEvent ID 18 from Microsoft-Windows-RasSstp

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