fail2ban: add 'log' command (#3299)

Co-authored-by: Georg Lauterbach <44545919+georglauterbach@users.noreply.github.com>

docs/content/config/security/fail2ban.md

@@ -48,6 +48,16 @@ This following configuration files inside the `docker-data/dms/config/` volume w
 [github-file-f2bjail]: https://github.com/docker-mailserver/docker-mailserver/blob/master/config-examples/fail2ban-jail.cf
 [github-file-f2bconfig]: https://github.com/docker-mailserver/docker-mailserver/blob/master/config-examples/fail2ban-fail2ban.cf
 
+### Viewing All Bans
+
+When just running
+
+```bash
+setup fail2ban
+```
+
+the script will show all banned IP addresses.
+
 ### Managing Bans
 
 You can manage F2B with the `setup` script. The usage looks like this:
@@ -56,7 +66,11 @@ You can manage F2B with the `setup` script. The usage looks like this:
 docker exec <CONTAINER NAME> setup fail2ban [<ban|unban> <IP>]
 ```
 
-When just running `setup fail2ban`, the script will show all banned IP addresses.
+### Viewing the Log File
+
+```bash
+docker exec <CONTAINER NAME> setup fail2ban log
+```
 
 ## Running Inside A Rootless Container
 

target/bin/fail2ban

@@ -3,7 +3,11 @@
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
 
-function __usage { echo "Usage: ./setup.sh fail2ban [<ban|unban> <IP>]" ; }
+function __usage
+{
+  echo "Usage: ./setup.sh fail2ban [<ban|unban> <IP>]"
+  echo "       ./setup.sh fail2ban log"
+}
 
 fail2ban-client ping &>/dev/null || _exit_with_error "Fail2ban not running"
 
@@ -73,6 +77,10 @@ else
       fi
       ;;
 
+    ( 'log' )
+      cat /var/log/mail/fail2ban.log
+      ;;
+
     ( * )
       __usage
       _exit_with_error "Unknown command '${1}'"

target/bin/setup

@@ -60,6 +60,7 @@ ${RED}[${ORANGE}SUB${RED}]${ORANGE}COMMANDS${RESET}
         setup fail2ban ${RESET}
         setup fail2ban ${CYAN}ban${RESET} <IP>
         setup fail2ban ${CYAN}unban${RESET} <IP>
+        setup fail2ban ${CYAN}log${RESET}
 
     ${LBLUE}COMMAND${RESET} debug ${RED}:=${RESET}
         setup debug ${CYAN}fetchmail${RESET}