post_install() {
  echo "To start tcpcrypt, run 'systemctl start tcpcryptd'. Secure"
  echo "connections should Just Work between tcpcrypt-enabled machines."
  echo
  echo "This implementation of tcpcrypt is relatively safe. In the worst case"
  echo "the daemon crashes and you lose all connectivity. When that happens,"
  echo "just run 'systemctl stop tcpcryptd' to tear down iptables"
  echo "rules and everything will continue."
  echo
  echo "For debugging, run 'tcnetstat' to list all active encrypted connections"
  echo "Run 'iptables -vnL' to check if iptables rules were set up correctly"
}