Rsync via SSH to a port which is not 22

rsync -avz -e "ssh -p 2020" user@remoteip:/path/to/files/ /local/path/

Throttle rsync to prevent it from using too much bandwidth

rsync -avz -e "ssh -p 2020" --numeric-ids --bwlimit=1.5m user@remoteip:/path/to/files/ /local/path/