root@piplite:/# ufw disable
Firewall stopped and disabled on system startup
root@piplite:/# ufw enable
ERROR: problem running init script
root@piplite:/# ufw enable
Firewall started and enabled on system startup
root@piplite:/# /etc/init.d/ufw restart
 * Skipping restart (not enabled)
root@piplite:/# ufw enable
Firewall started and enabled on system startup
root@piplite:/# /etc/init.d/ufw restart
 * Stopping firewall: ufw...                                                                                                                          [ OK ]
 * Starting firewall: ufw...                                                                                                                                 iptables-restore: line 71 failed
 * Problem running '/etc/ufw/before.rules'...                                                                                                                iptables-restore: line 34 failed
 * Problem running '/etc/ufw/after.rules'...                                                                                                          [fail]