ARRv2 RC is shipped with URL rewrite v2 RC1. As a part of security feature, in URL rewrite v2 RC1, you have to explicitly manage the allow and deny list. The documentation on this is at http://learn.iis.net/page.aspx/686/setting-http-request-headers-and-iis-server-variables/

Depending on the FREB rule, you may not get any log. Are you collecting logs for response 200-999? The term "failed request" may seem confusing. The request does not have to fail, per se - it generates the traces based on the rule/criteria. So if you configure it to collect anything between...

Is there an easy way to configure Forms Authentication to be passed to the farm servers, the idea is to have the authentication happen at one server and another server will be access with those credentials, our application uses forms authentication, and when we hit another server directly on the farm...

No, you don't need to move it. ARR is a "server" level feature, meaning it is available for all sites to use. Therefore, if you already have a site running on port 80, you will want to add an additional rule in URL rewrite conditions (using SERVER_PORT) so that the URL rewrite rule is apply...

We install Microsoft Application Request Routing on a server and we are using it as a reverse proxy server. All the url rewrite rules work, if we update the rule set with new rules everything still works but if we introduce or modify any rule that contains any IP condition and use REMOTE_ADDR as a variable...

Could you provide more info on where you are getting the /directory2/ path? Is that embedded in the entity body of the response? I am little bit puzzled as to where you might be getting that info. Also, could you provide the URL rewrite rules and the scenarios that you are trying to enable.