Ping monit does not work

[MarekWojtaszek]

I am trying to use Services \ Monit to monitor whether my two gateways are up.
So I created a Test setup which looks like this:

failed ping4 count 5 address 192.168.101.1
failed ping4 count 5 address 192.168.102.1

Unfortunately, they are failing for whatever reason ('ICMP failed').

When I put any router's (OPNsense's) IP, for example 192.168.131.1 (LAN), 192.168.101.2 (WAN),  192.168.102.2 (WAN2), 172.16.0.1 (firewall's virtual IP) - the status is 'OK' (pings are responding).

But when I change it to any IPs that is outside of the firewall machine (any internet host like 8.8.8.8 or 8.8.4.4), the gateways (192.168.101.1, 192.168.101.2) or any IPs inside my network (192.168.131.0/24)-- the status is always 'ICMP failed'

I don't understand why as all of those IPs are perfectly pingable from the OPNsense's SSH.
It does not seem to be blocked by the firewall rule either (I found nothing in the firewall logs).

The logs say something like this:

Code: [Select]

2024-05-18T21:37:49 Error monit 'Monitor_Mobile_Gateway' ping test failed
2024-05-18T21:37:49 Error monit Cannot bind to outgoing address -- Can't assign requested address
Any ideas what can be wrong there?