Check_ping: Invalid hostname/address

Hello, I would like to know why the following problem occurs in the configuration of my notifications of the client computers that I have connected: I only see the computer that acts as the server, but the client computers (the ones I am monitoring) do not appear, in addition to 2 of The events associated with my latop server appear with the error: check_ping: Invalid hostname / address - I leave you my configuration of my hosts.conf file so that you can help me:

object Host NodeName {
/* Import the default host template defined in templates.conf. */
import “generic-host”

/* Specify the address attributes for checks e.g. ssh or http. */
address = “127.0.0.1”
address6 = “::1”

/* Set custom variable os for hostgroup assignment in groups.conf. */
vars.os = “Linux”

/* Define http vhost attributes for service apply rules in services.conf. /
vars.http_vhosts[“http”] = {
http_uri = “/”
}
/
Uncomment if you’ve sucessfully installed Icinga Web 2. */
//vars.http_vhosts[“Icinga Web 2”] = {
// http_uri = “/icingaweb2”
//}

/* Define disks and attributes for service apply rules in services.conf. /
vars.disks[“disk”] = {
/
No parameters. */
}
vars.disks[“disk /”] = {
disk_partitions = “/”
}

/* Define notification mail attributes for notification apply rules in notifications.conf. /
vars.notification[“mail”] = {
/
The UserGroup icingaadmins is defined in users.conf. */
groups = [ “icingaadmins” ]
users = [ “icingaadmin” ]
}

}

object Host “innovex_ubuntu1” {
address = “192.168.1.2”
max_check_attempts = 3
check_interval = 1m
retry_interval = 1m
check_command = “hostalive”
}

object Host “innovex_ubuntu2” {
address = “192.168.1.3”
check_command = “hostalive”
max_check_attempts = 3
check_interval = 1m
retry_interval = 1m

}

object Host “rpi_2” {
address = “192.168.1.5”
check_command = “hostalive”
max_check_attempts = 3
check_interval = 1m
retry_interval = 1m
}

Hello there and welcome to Icinga,
I would like to point you to our formatting guidelines which can help you make your posts more readable, which in turn will make it easier for others to answer :slight_smile: