[Cialug] ufw not working

[L. V. Lammert]

Installed ufw on a Debian 10 box to permanently block some of the
malicious traffic appearing in fail2ban.

Unfortunately, even with a ban at the very top, traffic does not get
rejected:

# ufw status
Status: active

To                         Action      From
--                         ------      ----
Anywhere                   DENY        108.165.188.68
80                         ALLOW       Anywhere
25                         ALLOW       Anywhere
53                         ALLOW       Anywhere
2206                       ALLOW       Anywhere
443                        ALLOW       Anywhere

The ban DOES appear in iptables:

Chain ufw-user-input (1 references)
 pkts bytes target     prot opt in     out     source
destination
    0     0 DROP       all  --  *      *       108.165.188.68       0.0.0.0/0

But, as shown, it has not blocked any traffic at all - almost like the
ufw-user-input chain is never seeing traffic.

Is there something special required when installing ufw to activate those
chains?

	TIA!