Continuing the discussion from [Send email on firewall warning]

Installing and Using OpenWrt Network and Wireless Configuration
1

Continuing the discussion from Send email on firewall warning:

So Ihad to make some slight mods to the scripts files, mostly the way that they sended the emails wasn't correct and provoked that emails were rejected by the server (this is because on how smtp behaves, it will try to send the email as root@(router hostname).(domain extension) typically as root@openwrt.lan and not the email as specified in the config.

The files will be something like this:

/etc/ssmtp/logWatch.sh

#!/bin/sh
# This script filters the logs and send it via mail

# Installation on openwrt
#- opkg update && opkg install diffutils
#- install and setup ssmtp (https://fleshandmachines.wordpress.com/2014/09/14/openwrt-automatic-email-sending/)
#- add it to crontab

# Rules
RULES="grep -v info"
MAIL="destinationemailaddress@theirdomain.com"

# DO NOT TOUCH
OLD_LOG=/tmp/oldlog
NEW_LOG=/tmp/newlog

if [ -f $OLD_LOG ]; then
   logread > $NEW_LOG
else
   touch $OLD_LOG
   logread > $NEW_LOG
fi

DIFF=$(diff $NEW_LOG $OLD_LOG | grep -v ^--- | grep ^- | $RULES)

echo Starting email sender
if [ -z "$DIFF" ]; then
    echo "No changes to be send exiting"
    mv $NEW_LOG $OLD_LOG
    exit 0
else
    {
       echo To: $MAIL
       echo Subject: Log activity detected on $HOSTNAME
       echo
       echo $DIFF
    } | sendmail -F"OpenWrt" -t
    mv $NEW_LOG $OLD_LOG
fi

/etc/init.d/emailafterreboot

#!/bin/sh /etc/rc.common
# Example script
# Copyright (C) 2007 OpenWrt.org

 START=99
 STOP=100

 RULES="grep -v info"
 MAIL=destinationemailaddress@theirdomain.com

 OLD_LOG=/tmp/oldlog
 NEW_LOG=/tmp/newlog

 if [ -f $OLD_LOG ]; then
            logread > $NEW_LOG
 else
            touch $OLD_LOG
            logread > $NEW_LOG
 fi

 DIFF=$(diff $NEW_LOG $OLD_LOG | grep -v ^--- | grep -v ^- | $RULES)

  start() {
            echo Starting email sender after reboot
            if [ -z "$DIFF" ]; then
                        echo "No changes to be send exiting"
                        mv $NEW_LOG $OLD_LOG
                        exit 0
            else
                        {
                              echo To: $MAIL
                              echo Subject: Log activity detected on $HOSTNAME
                              echo
                              echo $DIFF
                        } | sendmail -F"OpenWrt" -t
                        mv $NEW_LOG $OLD_LOG
            fi
          }

  stop() {
            echo Stoping email sneder after reboot
            # commands to kill application
            if [ -f $NEW_LOG ]; then
                        mv $NEW_LOG $OLD_LOG
            else
                        exit 0
            fi
         }

  boot() {
            echo Starting email sender after reboot
            if [ -z "$DIFF" ]; then
                        echo "No changes to be send exiting"
                        mv $NEW_LOG $OLD_LOG
                        exit 0
            else
                        {
                              echo To: $MAIL
                              echo Subject: Log activity detected on $HOSTNAME
                              echo
                              echo $DIFF
                        } | sendmail -F"OpenWrt" -t
                        mv $NEW_LOG $OLD_LOG
            fi
         }