DNSBL — specify real-time DNS blocklist servers
The directive allows definition of realtime blocklist servers (special-purpose DNS servers) that should be contacted in order to verify client IP address "validity". This way, you can deny access to known-bad clients (such as ones coming in from open proxy servers).
Many fraudulent credit card orders are placed from open proxy machines to hide the actual identity of the criminal, so denying access to open-proxy visitors might be a good idea.
Interchange 5.9.0:
Source: lib/Vend/Config.pm
Line 3780 (context shows lines 3780-3800)
sub parse_array { my($item,$settings) = @_; return '' unless $settings; my(@setting) = grep /\S/, split /[\s,]+/, $settings; my $c; if(defined $C) { $c = $C->{$item} || []; } else { no strict 'refs'; $c = ${"Global::$item"} || []; } for (@setting) { check_legal($item, $_); push @{$c}, $_; } $c; }