Ufw
From Lolly's Wiki
# ufw [insert <number>] allow log-all from 10.0.0.0/16 to any app OpenSSH
Rule inserted
# ufw status verbose
Status: active
Logging: on (low)
Default: deny (incoming), allow (outgoing), disabled (routed)
New profiles: skip
To Action From
-- ------ ----
22/tcp (OpenSSH) ALLOW IN 10.0.0.0/16 (log-all)