Note

It typically runs on port 873 over UDP.

Nmap Scan

sudo nmap -sV -p 873 127.0.0.1

HTB Cheatsheet

CommandDescription
nc -nv 127.0.0.1 873Probing for accessible shares.
rsync -av --list-only rsync://127.0.0.1/devEnumerating an open share.
braa <community string>@<FQDN/IP>:.1.*Bruteforcing SNMP service OIDs.

You should check Footprinting Theory ๐ŸŒš to get further knowledge.