letsencrypt_pre_hook.sh

#!/bin/bash

# Short-Description: LETSENCRYPT PRE HOOK SCRIPT
# Description:  To force open http port 80 to be used by letsencrypt client standlone command

## If you need a custom hook file, create a file with the same name in
## /usr/local/ispconfig/server/conf-custom/scripts/
##
## End the file with 'return 124' to signal that this script should not terminate.
##
## Eg. you can override the ispc_letsencrypt_firewall_enable() function then 'return 124'
## to customize the firewall setup.
if [ -e "/usr/local/ispconfig/server/conf-custom/scripts/letsencrypt_pre_hook.sh" ]; then
  . /usr/local/ispconfig/server/conf-custom/scripts/letsencrypt_pre_hook.sh
  ret=$?
  if [ $ret != 124 ]; then exit $ret; fi
fi

declare -F ispc_letsencrypt_firewall_enable &>/dev/null || ispc_letsencrypt_firewall_enable() {
  # create 'ispc-letsencrypt' chain with ACCEPT policy and send port 80 there
  iptables -N ispc-letsencrypt
  iptables -I ispc-letsencrypt -p tcp --dport 80 -j ACCEPT
  iptables -A ispc-letsencrypt -j RETURN
  iptables -I INPUT -p tcp --dport 80 -j ispc-letsencrypt
}

ispc_letsencrypt_firewall_enable

# For RHEL, Centos or derivatives
if which yum &>/dev/null 2>&1; then
  # Check if web server software is installed, stop it if any
  if rpm -q nginx; then service nginx stop; fi
  if rpm -q httpd; then service httpd stop; fi
# For Debian, Ubuntu or derivatives
elif apt-get -v >/dev/null 2>&1; then
  # Check if web server software is installed, stop it if any
  if [ "$(dpkg-query -W -f='${Status}' nginx 2>/dev/null | grep -c "ok installed")" -eq 1 ]; then service nginx stop; fi
  if [ "$(dpkg-query -W -f='${Status}' apache2 2>/dev/null | grep -c "ok installed")" -eq 1 ]; then service apache2 stop; fi
fi