F5 DNS external monitor

Hi, sorry the delay.

OK, the issue is probably the SNI.

Could you try with this external monitor?

I use to have this one on my setup.

Regards

#!/bin/sh
# These arguments supplied automatically for all external monitors:
# $1 = IP (nnn.nnn.nnn.nnn notation)
# $2 = port (decimal, host byte order)
#
# This script expects the following Name/Value pairs:
# HOST = the host name of the SNI-enabled site
# URI  = the URI to request
# RECV = the expected response
#
# Remove IPv6/IPv4 compatibility prefix (LTM passes addresses in IPv6 format)
 
NODE=`echo ${1} | sed 's/::ffff://'`
if [[ $NODE =~ ^[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}$ ]]; then
    NODE=${NODE}
else
    NODE=[${NODE}]
fi
PORT=${2}
 
PIDFILE="/var/run/`basename ${0}`.sni_monitor_${HOST}_${PORT}_${NODE}.pid"
if [ -f $PIDFILE ]
then
    echo "EAV exceeded runtime needed to kill ${HOST}:${PORT}:${NODE}" | logger -p local0.error
    kill -9 `cat $PIDFILE` > /dev/null 2>&1
fi
echo "$$" > $PIDFILE
curl-apd -k -i --silent --resolve ${HOST}:${PORT}:${NODE} https://${HOST}:${PORT}${URI} | grep -i "${RECV}" > /dev/null 2>&1
STATUS=$?
# Remove the pidfile before the script echoes anything to stdout and is killed by bigd  
rm -f $PIDFILE
if [ $STATUS -eq 0 ]
then
    echo "UP"
fi
exit