print "$_" if /\b12345\b|
               \b12346\b|
               \b20034\b|
               \b8787\b|
               \b31337\b|
               \b31338\b|
               \b54320\b|
               \b54321\b/x;

##</code><code>##

print "$_" if (/\b12345\b/ or
               /\b12346\b/ or
               /\b20034\b/ or
               /\b8787\b/ or
               /\b31337\b/ or
               /\b31338\b/ or
               /\b54320\b/ or
               /\b54321\b/);

##</code><code>##

my @ports = map { qr/$_/ } ("\b12345\b", "\b12346\b", "\b20034\b",
                            "\b8787\b", "\b31337\b", "\b31338\b",
                            "\b54320\b", "\b54321\b");
while (<FWLOG>) {
    for my $port (@ports) {
        if ($_ =~ $port) {
            print;
            last;
        }
    }
}