You can always sort IPs like this
use strict;
my @ips = (
"1.2.3.4",
"1.2.3.5",
"1.2.3.3",
"2.2.3.4",
"1.0.2.3");
@ips = map {$_->[1]}
sort {$a->[0] cmp $b->[0]}
map { [
join(".",
map {sprintf "%03d", $_}
split('\.', $_)
),
$_
]
} @ips;
print join "\n", @ips;
__OUTPUT__
1.0.2.3
1.2.3.3
1.2.3.4
1.2.3.5
2.2.3.4
--
flounder
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