ping issues

[Paul Theodoropoulos]

I'm running a little personal project on a shoestring budget - e.g. a 
couple of AWS t2.nano instances, so everything needs to be stripped as 
bare as possible.

Testing one of the servers from offsite, I can run a single byte 
(ignoring overhead), single count ping from the command line no problem 
(Debian Stretch).

address@hidden: ~ # ping -c1 -s 1 a.ns.anastrophe.com
PING a.ns.anastrophe.com (52.32.92.141) 1(29) bytes of data.
9 bytes from a.ns.anastrophe.com (52.32.92.141): icmp_seq=1 ttl=42

--- a.ns.anastrophe.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms

etc etc

However, within monit, the smallest I can set the size is 20, anything 
less and it fails.

check host a.ns-ping with address 52.32.92.141
if failed
   ping4 count 3 size 20
   with timeout 15 seconds
then exec /usr/local/bin/pushover

I can certainly live with 20 byte packets, but I'm wondering why less 
than 20 bytes won't work in monit. The docs only say that the default is 
64 bytes, but no minimum.

--
Paul Theodoropoulos
www.anastrophe.com