SMB - 139/445

Basic usage

smbclient -L \\\\IP\\ -N # Null login, list shares.
smbclient \\\\IP\\SHARE$ -N # Connect to share will Null login

SMB can be used in the file explorer. This is nice if you have read and write privs.

RPC

rpcclient -U "" -N 192.168.73.122