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We run a Nagios 3.x instance in a remote data center, and ideally I'd want to monitor all services that this hosts runs.

Host alive

Modified version of the default host alive check, with IPv6 flag. From . Excerpt from /etc/nagios3/commands.cfg:

# Changed to include IPv4IPv6 flag - DV 2010-12-04
define command{
        command_name    check-host-alive6
        command_line    /usr/lib/nagios/plugins/check_ping -H '$HOSTADDRESS$' -6 -w 5000,100% -c 5000,100% -p 1
}

Disk usage

This can be done with the standard check_disk_smb_host_user, because that relies on the smbclient binary, which is part from the samba-3.4.7 package, which supports IPv6.

Microsoft SQL Server

FreeTDS library patch uitleggen

SSL certificate expiration date

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