Nix: R-services

TCP 512/513/514: rexecd, rlogind, rshd
UDP 513: rwhod
https://en.wikipedia.org/wiki/Berkeley_r-commands
Server Config
- /etc/hosts.equiv: allowed hosts for rlogin
- ~/{.rlogin, .rhosts}: allowed hosts

Suite of obsolete remote management tools. All communication is unencrypted including its authentication.

# Enum via nmap
sudo nmap -sV -p 512,513,514 <TARGET>

# Remote copy; does not confirm remote overwriting of files
rcp
# Remote shell
rsh
# Remote command
rexec
# Remote login (telnet-like)
rlogin <TARGET> -l <USER>
# Show authenticated users
rwho
rusers -al <TARGET>