Rsync is a tool for locally and remotely copying files. Uses an algorithm that minimizes that amount of data transmitted over the network when a version of the file already exists on the destination host. By default it uses port 873 and can be configured to use SSH for secure file transfers.
Rsync Port Scan
Check whether rsync is exposed.
# Does rsync exist
sudo nmap -sV -p 873 127.0.0.1Probe Accessible Shares
Use netcat to probe the rsync service directly.
# probing for accessible shares
nc -nv 127.0.0.1 873List Open Share
Enumerate an open share without transferring files.
# enumerating an open share
rsync -av --list-only rsync://127.0.0.1/dev