QUESTION PIAF12 (Ubuntu) fail2ban disabled ?

[panachoi]

I've noticed that I no longer get emails about IPs being banned by fail2ban, which I used to with the "old" (CentOS, PIAF 11).

Digging deeper, it appears that the entire fail2ban has been disabled in /etc/fail2ban/jail.conf:

# Multiple jails, 1 per protocol, are necessary ATM:
# see https://github.com/fail2ban/fail2ban/issues/37
[asterisk-tcp]
 
enabled  = false
filter  = asterisk
port    = 5060,5061
protocol = tcp
logpath  = /var/log/asterisk/messages
 
[asterisk-udp]
 
enabled  = false
filter  = asterisk
port    = 5060,5061
protocol = udp
logpath  = /var/log/asterisk/messages

On Centos/PIAF11, it looked thusly:

[asterisk-iptables]
 
enabled  = true
filter  = asterisk
action  = iptables-allports[name=ASTERISK, protocol=all]
          sendmail-whois[name=ASTERISK, dest=root@localhost, [email protected]]
logpath  = /var/log/asterisk/full
#logpath  = /var/log/messages
maxretry = 5
bantime = 1800

I dont rember if I changed that in the installtion, as there's nothing much interesting in /var/log/messages, nor in /var/log/asterisk/messages either on PIAF12.
Clearly, enabled=false will disable the jail for asterisk entirely. Is it safe and/or useful to just set enabled=true on PIAF12 and then restart fail2ban ?