Free ports 80 and 443 on Synology NAS

free_ports.sh

#! /bin/bash

# NEWLY ADDED BACKUP FUNCTIONALITY IS NOT FULLY TESTED YET, USE WITH CARE, ESPECIALLY DELETION
# Steps to install
# Save this script in one of your shares
# Backup /usr/syno/share/nginx/ as follows:
# # cd /usr/syno/share/
# # tar cvf ~/nginx.tar nginx
# Run this script as root
# Reboot and ensure everything is still working
# If not, restore the backup and post a comment on this script's gist page
# If it did, schedule it to run at boot
#   through Control Panel -> Task Scheduler

HTTP_PORT=81
HTTPS_PORT=444

BACKUP_FILES=false
BACKUP_DIR=/volume1/apps/free_ports/backup
DELETE_OLD_BACKUPS=false
KEEP_BACKUP_DAYS=30

DATE=$(date +%Y-%m-%d-%H-%m-%S)

if [ "$BACKUP_FILES" == "true" ]; then
  mkdir -p "$BACKUP_DIR/$DATE"
  cp /usr/syno/share/nginx/*.mustache "$BACKUP_DIR/$DATE"
fi

if [ "$DELETE_OLD_BACKUPS" == "true" ]; then
  find "$BACKUP_DIR/" -type d -mtime +$KEEP_BACKUP_DAYS -exec rm -r {} \;
fi

sed -i "s/^\([ \t]\+listen[ \t]\+[]:[]*\)80\([^0-9]\)/\1$HTTP_PORT\2/" /usr/syno/share/nginx/*.mustache
sed -i "s/^\([ \t]\+listen[ \t]\+[]:[]*\)443\([^0-9]\)/\1$HTTPS_PORT\2/" /usr/syno/share/nginx/*.mustache