[Mimedefang] filter recipient regex
Jason Gurtz
jason at jasongurtz.com
Thu Nov 22 01:05:28 EST 2007
On 11/21/2007 08:53, Paul Houselander wrote:
>
> I get a lot of dictionary attacks for a particular domain and there always
> in the format
>
> s172hsgw.876 at custs.dom.com
>
> i.e. "s" + 7 alpha numeric chars + "." + 3 alphanumeric chars + @domain
>
> if($recip =~ /<?s([0-9a-z]{7}).([0-9]{3})+(\@custs\.dom\.com)>?/){
> return ("REJECT","No such user","550","5.1.1");
> }
>
> but it doesnt work, can anyone help/suggest what I should be doing?
Forgot to escape the first dot and 3 chars before "@" are tested just
for digits. For that matter I'm not certain without looking about
matching @ in perl since it's part of the language. It may help
troubleshooting to assign the regex (in single quotes) to a scalar and
operate with that
Completely off the top of my head at this late hour after baking all
evening I'd try something like:
my $matchBadAddy = '<{,1}s\w{7}\.\w{3}@custs\.dom\.com>{,1}';
if( $recip =~ /$matchBadAddy/ ) }
return ...
}
also unsure about necessity of matching angle brackets....
~Jason
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