first commit

update-firewall.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+BASE_DIR="/mnt/docker-persistent-data/docker"
+INI_FILE=$BASE_DIR"/last-ip.ini"
+LOG_FILE=$BASE_DIR"/update-firewall.log"
+
+CURRENT_IP=$(dig +short lan.ddnsgeek.com)
+LAST_IP=`cat $INI_FILE`
+
+CMD_PART_1='allow proto tcp from'
+CMD_PART_2='to any port 22'
+
+echo $(date -d "+10 hours" "+%a %b %d %T") > $LOG_FILE
+echo "Last IP address: "$LAST_IP >> $LOG_FILE
+echo "Current IP address: "$CURRENT_IP >> $LOG_FILE
+
+if ! [ $CURRENT_IP == $LAST_IP ];
+then
+echo "Updating Firewall Rules" >> $LOG_FILE
+
+sudo ufw delete $CMD_PART_1 $LAST_IP $CMD_PART_2
+sudo ufw $CMD_PART_1 $CURRENT_IP $CMD_PART_2
+echo $CURRENT_IP > $INI_FILE
+
+else
+echo "IP address is correct. No firewall changes needed" >> $LOG_FILE
+fi