+
+ my $dnsserver = $opts->{dns};
+ my $reversednsserver = $opts->{reversedns};
+ my $dnszone = $opts->{dnszone};
+ raise_param_exc({ dns => "$dnsserver don't exist"}) if $dnsserver && !$dns_cfg->{ids}->{$dnsserver};
+ raise_param_exc({ reversedns => "$reversednsserver don't exist"}) if $reversednsserver && !$dns_cfg->{ids}->{$reversednsserver};
+ raise_param_exc({ dnszone => "missing dns server"}) if $dnszone && !$dnsserver;