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-rwxr-xr-xactionpack/lib/action_controller/request.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/actionpack/lib/action_controller/request.rb b/actionpack/lib/action_controller/request.rb
index aaefe92ebf..69c325035b 100755
--- a/actionpack/lib/action_controller/request.rb
+++ b/actionpack/lib/action_controller/request.rb
@@ -43,7 +43,7 @@ module ActionController
if env.include? 'HTTP_X_FORWARDED_FOR' then
remote_ips = env['HTTP_X_FORWARDED_FOR'].split(',').reject do |ip|
- ip =~ /^unknown$|^(10|172\.16|192\.168)\./i
+ ip =~ /^unknown$|^(10|172\.(1[6-9]|2[0-9]|30|31)|192\.168)\./i
end
return remote_ips.first.strip unless remote_ips.empty?