All Barracuda Backup Servers, all firmware versions.
If your Barracuda Backup Server is properly configured and linked and physical network connectivity has been verified, but it appears to be offline or is not transferring data properly, the following may be useful troubleshooting steps:
1. Checking port restrictions on your firewall is a good initial troubleshooting step.
2. Checking used IP Address Ranges to ensure traffic is not blocked.
Note: These ports cannot be proxied through any edge device, unless exempted from the proxy or NAT'ed through a firewall. For more information, see this solution.
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