script for pfSense to detect IPv6 router advertisements coming from a WAN interface

v6test.sh

#!/bin/sh

# set the variable below to your FIOS interface
IF=igb0

/usr/bin/timeout 5m /usr/sbin/tcpdump -ni ${IF} 'icmp6 && ip6[40] == 134' >/tmp/${IF}_RAs.out
FSIZE=$(/usr/bin/stat -f '%z' /tmp/${IF}_RAs.out)
if [ "$FSIZE" -gt 1 ]; then
  echo '<?php include("notices.inc"); $msg = "IPv6 RAs detected on interface '$IF'"; notify_via_smtp($msg);?>' | /usr/local/bin/php -q
fi

Thanks! For anyone like me didn't already have them setup, this assumes you've setup SMTP notifications in pfsense (System > Advanced > Notifications). I used my Gmail credentials as outlined in this blog post.

Great script! However, is there a way to tie the notification into Telegram?

@sectary-want-holly sure, just edit the notify_via_smtp() line, change it to notify_via_telegram($msg);

@luckman212 well, I feel silly! Muchos gracious!