How to restore softether ddns hostname

[Gulaholic]

Hello,

I'm planning to reinstall my server, the question is how can I restore or use my old DDNS Hostname provided by Softether?

The problem is, for example right now my DDNS hostname is myvpn.softether.com, if I reinstall Softether I can't use the same DDNS hostname.
How can I reuse the same DDNS hostname?

Thanks

[thisjun]

Please backup DDNS key in the configuration file.
After finishing new server configuration, overwrite the key.