I want to be able to extract the '192.168.100.0 0.0.0.255' out of the below text. 

my $entry = 'permit ip host 10.11.1.1 192.168.100.0 0.0.0.255';
while ($entry =~ /(?:host){0}\s+(\d+\.\d+\.\d+\.\d+)\s+(\d+\.\d+\.\d+\
+.\d+)/g){
        # do something with $1 and $2
}

[download]

I need to find every occurrence of these two network and mask combinations. So basically if the entry is

permit ip host 10.11.1.1 192.168.100.0 0.0.0.255

I want to pull out

192.168.100.0 0.0.0.255

but if the entry is

permit ip 10.11.1.0  0.0.0.255 192.168.100.0 0.0.0.255

I want to pull out

10.11.1.0  0.0.0.255 
192.168.100.0 0.0.0.255

[download]

Why doesn't {0} match zero times like I expect it to?

In reply to Match zero times in regex by SomeNetworkGuy

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