New to Dreamhost:
Using the backup server (backup.dreamhost.com) to move duplicity backups off another server, and all was working well, till the connection dropped.
Looked into some possible DNS problems to find out why it stopped last night, I found that backup.dreamhost.com resolves to 18.104.22.168, but reverse DNS for that IP address resolves to cargolinerplus.com. Whois data of cargolinerplus.com does not indicate DH.
Arin.net whois on the IP does indicate it's Dreamhost. I'd suggest that DH changes the reverse DNS on the 205 backup server to indicate backup.dreamhost.com.