I'm using a Synology S420j (running DSM 6.2.4-25556) to backup files from my Mac (Monterey v12.1) using the following command:
rsync -avz --backup rsync-user@nas.local::backups/
This has previously worked, but I've been changing a few things recently and now I'm getting this error:
@ERROR: host is denied to login
rsync error: error starting client-server protocol (code 5) at /System/Volumes/Data/SWE/macOS/BuildRoots/5b2e67f8af/Library/Caches/com.apple.xbs/Sources/rsync/rsync-55/rsync/main.c(1402) [receiver=2.6.9]