Connection to Veeam Backup service unavailable.
These connectivity issues may be related to the following causes:
Please review the port requirements section of the user guide for Backup Enterprise Manager. Ensure that the ports above are open and communication can be made between the Veeam Backups Server and the Backup Enterprise Manager server.
If one or the other is unable to resolve the others hostname or FQDN to the correct IP, correct the environment so that DNS resolves. Editing the hosts can be done as a workaround.
The advice in this section is intended for use in environments where internal networks are isolated, and a connection needs to be made that will not traverse the Internet. The communication methods that the software uses are not designed to support NAT, however, modifications can be made to make it work with NAT.
Veeam strongly advises against using these modifications when the connection between the Enterprise Manager Server and Veeam Backup Server will occur over the open Internet, as that would expose critical Veeam Backup & Replication services. Instead, Veeam advises that if Enterprise Manager must manage a Veeam Backup Server across an internet connection, a VPN or private network solution be used.
NAT Workaround Credit to http://forums.veeam.com/veeam-backup-replication-f2/making-veeam-enterprise-manager-work-over-a-wan-link-t14740.html#p67775
Veeam Backup Enterprise Manager expects that the Veeam Backup Server added to it will be resolvable via DNS and rDNS. That is to say, if a Veeam Backup Server is added via IP address, the Enterprise Manager server can resolve that IP address to a DNS name that can be contacted to reach the Veeam Backup Server. This can be made more complicated by the fact that during some interactions, Veeam Backup & Replication will directly communicate to the Enterprise Manager server its actual DNS/FQDN and IP address, which of course, will not work when that Veeam Backup Server is behind NAT.
If NAT is being used between the Enterprise Manager server and Veeam Backup Server, you must configure the following registry keys on the Veeam Backup Server.
After configuring these registry values, verify that the Enterprise Manager can resolve the configured FQDN/Hostname and that the required ports can be reached on the Veeam Backup Server from the Enterprise Manager Server.
With all of the above confirmed and implemented, the Veeam Backup Server can be added to the Enterprise Manager using the FQDN of the Veeam Backup server.
If, after a reboot, the Veeam Backup Service cannot start on the Veeam Backup Server, check to see if the Veeam Backup Server is resolving its internal IP address correctly. If it is unable to, a local hosts file edit may have to be made so that the services on the Veeam Backup Server will connect to the local SQL instance.
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