Added fail2ban, though not sure its configured correctly yet

docker/rootfs/fail2ban/action.d/mail-whois-common.conf

@@ -0,0 +1,29 @@
+## Version 2022/08/06
+# Fail2Ban configuration file
+#
+# Common settings for mail actions
+#
+# Users can override the defaults in mail-whois-common.local
+
+[INCLUDES]
+
+# Load customizations if any available
+after = mail-whois-common.local
+
+[DEFAULT]
+#original character set of whois output will be sent to mail program
+_whois = whois <ip> || echo "missing whois program"
+
+# use heuristics to convert charset of whois output to a target
+# character set before sending it to a mail program
+# make sure you have 'file' and 'iconv' commands installed when opting for that
+_whois_target_charset = UTF-8
+_whois_convert_charset = (%(_whois)s) |
+                         { WHOIS_OUTPUT=$(cat) ; WHOIS_CHARSET=$(printf %%b "$WHOIS_OUTPUT" | file -b --mime-encoding -) ; printf %%b "$WHOIS_OUTPUT" | iconv -f $WHOIS_CHARSET -t %(_whois_target_charset)s//TRANSLIT - ; }
+
+# choose between _whois and _whois_convert_charset in mail-whois-common.local
+# or other *.local which include mail-whois-common.conf.
+_whois_command = %(_whois)s
+#_whois_command = %(_whois_convert_charset)s
+
+[Init]