CBT installation fails.

[FrancWest]

Hi,

Case #06177255. After the upgrade from Veeam V11 to Veeam V12, the agent backup of the Veeam server itself fails with the following error:

Task failed. Error: Connection problems.

Uninstalling the agent and reinstalling it, fails on the installation the CBT driver. The error reported isL

Failed [vbr] Failed to install Veeam CBT Driver: Connection problems. I’m installing it from the console on the Veeam server itself.

A rescan gives:

Failed Failed to send certificate, but certificate is required for remote agent management Error: Failed to establish connection: no valid IP addresses were found.

[HannesK]

Hello,
as I don't find a question in the thread, I would make the suggestion to continue with support. It's not a well known issue and guessing on that type of problem on a forum makes little sense.

Best regards,
Hannes

[FrancWest]

Sorry, I understand, but we found the issue. We had to add the server by IP instead of the FQDN even though the FQDN resolves fine to the correct IP. After doing that, the driver installed fine and the job also runs fine. According to support this has something to do with Kerberos vs NTLM authentication which changed in the latest agent included in V12. When using an IP is uses NTLM, while when using a FQDN it uses Kerberos. The Veeam server is not joined to a domain, so it's still a bit strange why it wants to use Kerberos.

[HannesK]

hmm thanks, I agree, that makes no sense. Let me check that.