### Interface(s) that ntop will capture on (default: eth0)
{
    my $if = $InternalInterface{'Name'} || 'eth0';
    my $mode = $SystemMode || 'serveronly';
    if ($mode ne 'serveronly'){
        my $extif = $ExternalInteraface{'Name'} || 'eth1';
        $if .= ",$extif";
    }
    # Now, do we have some VPN interface to look at ?
    my $ovpndb = esmith::ConfigDB->open_ro('openvpn-s2s');
    my $s2s = ${'openvpn-s2s'}{'status'} || 'disabled';
    if (defined $ovpndb && $s2s eq 'enabled'){
        foreach my $vpn ($ovpndb->get_all_by_prop(type=>'client'),$ovpndb->get_all_by_prop(type=>'server')){
            my $status = $vpn->prop('status') || 'disabled';
            next unless ($status eq 'enabled');
            my $name = $vpn->key;
            $if .= ",tun$name";
        }
    }
    $OUT .= "--interface $if\n";
}
--no-interface-merge
