my $appendCmd  = "iptablesAdm append";
    $appendCmd    .= " --type=rule";
    $appendCmd    .= " --table=filter";
    $appendCmd    .= " --chain=INPUT";
    $appendCmd    .= " --protocol=${protocol}"; 
    $appendCmd    .= " --domain=${domain}"; 
    $appendCmd    .= " --persist=yes"; 

##</code><code>##

    my $appendCmd  = "iptablesAdm append"
                   . " --type=rule"
                   . " --table=filter"
                   . " --chain=INPUT"
                   . " --protocol=${protocol}" 
                   . " --domain=${domain}"
                   . " --persist=yes";