/etc/ufw/ufw.conf
# /etc/ufw/ufw.conf
#
# Set to yes to start on boot. If setting this remotely, be sure to add a rule
# to allow your remote connection before starting ufw. Eg: 'ufw allow 22/tcp'
ENABLED=yes
# Please use the 'ufw' command to set the loglevel. Eg: 'ufw logging medium'.
# See 'man ufw' for details.
LOGLEVEL=medium
$ ufw status verbose
Status: active
Logging: on (medium)
Default: deny (incoming), allow (outgoing), disabled (routed)
New profiles: skip
Вижу что он блокирует, но в /var/log нет логов.