We have had a number of queries on how to enable replication using certificates created from makecert. Though the Understanding and Troubleshooting guide for Hyper-V Replica discusses this aspect, I am posting a separate article on this. The below steps are applicable for a simple lab deployment consisting of two standalone servers – PrimaryServer.domain.com and ReplicaServer.domain.com. This can be easily extended to clustered deployments with the Hyper-V Replica Broker.
Makecert is a certificate creation tool which generates certificates for testing purpose. Information on makecert is available here - https://msdn.microsoft.com/library/bfsktky3.aspx.
1. Copy the makecert.exe tool to your primary server
2. Run the following command from an elevated command prompt , on the primary server. This command creates a self-signed root authority certificate. The command also installs a test certificate in the root store of the local machine and is saved as a file locally
makecert -pe -n "CN=MyTestRootCA" -ss root -sr LocalMachine -sky signature -r "MyTestRootCA.cer"
3. Run the following command couple of times, from an elevated command prompt to create new certificate(s) signed by the test root authority certificate
makecert -pe -n "CN=<FQDN>" -ss my -sr LocalMachine -sky exchange -eku 188.8.131.52.184.108.40.206.1,220.127.116.11.18.104.22.168.2 -in "MyTestRootCA" -is root -ir LocalMachine -sp "Microsoft RSA SChannel Cryptographic Provider" -sy 12 <MachineName>.cer
Replace < FQDN > with FQDN of primary, replica server(s) and Hyper-V Replica broker (if required, in a clustered deployment).
Replace .cer with any name
The command installs a test certificate in the Personal store of the local machine and is saved as a file locally. The certificate can be used for both Client and Server authentication
4. The certificates can be viewed by mmc->File->Add/Remove Snap in…->Certificates->Add->”Computer Account”->Next->Finish->Ok
You will find the Personal certificate (with the machine names) and the Root certificate (MyTestRootCA) in the highlighted folders:
5. Export the replica server certificate with the private key.
6. Copy MyTestRootCA.cer and the above exported certificate (RecoveryServer.pfx) to the Replica server.
7. Run the following command from an elevated prompt in ReplicaServer.domain.com
certutil -addstore -f Root "MyTestRootCA.cer"
8. Open the certificate mmc in ReplicaServer.domain.com and import the certificate (RecoveryServer.pfx) in the Personal store of the server. Provide the pfx file and password as input:
9. In a clustered deployment, two certificates are required on each server:
- Certificate with the subject name set to the server’s FQDN
- Certificate with the subject name set to the Hyper-V Replica Broker’s FQDN. This is required as the Hyper-V Replica Broker is Highly Available and can migrate from one server to another.
10. By default, a certificate revocation check is mandatory and Self-Signed Certificates don’t support Revocation checks. To work around it, modify the following registry key on Primary, Replica Servers
reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Virtualization\Replication" /v DisableCertRevocationCheck /d 1 /t REG_DWORD /f