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Attempting to add a Linux-base proxy in Veeam Backup for Microsoft 365 fails with the error: Error: .NET (`dotnet-`) must be added to the blacklist to prevent unattended upgrades that could impact the availability of the Linux proxy.
This error occurs when the proxy deployment process detects that dotnet- has not been excluded from unattended-upgrades. Per Veeam Backup for Microsoft 365 documentation: On Linux-based backup proxy servers, unattended-upgrades of .NET can impact a backup proxy server's availability. To prevent unattended-upgrades: On Ubuntu hosts, .NET (dotnet-) must be added to the blacklist. On Red Hat hosts, .NET (dotnet-*) must be added to the excludepkgs list.
For Ubuntu-based Proxy Connect to the Ubuntu-based Linux machine via SSH. Run the following command to confirm that dotnet has not been excluded from unattended-upgrades:
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