TCP 111: rpcbind

The port mapper (rpc.portmap or just portmap, or rpcbind) is an Open Network Computing Remote Procedure Call (ONC RPC) service that runs on network nodes that provide other ONC RPC services.

-- Wikipedia

Get Info

rpcinfo -s <ip>
rpcinfo -p <ip>

Look for NFS shares

rpcbind -p <ip>
sudo showmount -e <ip>