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438 Views 3 Replies Latest reply: Feb 20, 2014 3:08 PM by Brad McGarr RSS
mhellman Newcomer 1 posts since
Feb 10, 2014
Currently Being Moderated

Feb 10, 2014 8:24 AM

Clickprotect invalidating one-time use URLs?

We use one-time use URLs as part of our registration process for certain customers.  We have identified an issue where we believe the Clickprotect software is invalidating the URLs just prior to the customers request for said URL.  The requests are coming from IP address space that appears to belong to MX Logic.

 

  1. Is this expected behavior from your product (e.g. pre-fetching a URL on behalf of, but entirely separate from the customer)?
  2. Do you have a page we could direct customers to that will explain this behavior and how to resolve?
  3. We are contemplating blocking access to our network from the MX Logic networks.  How will this impact users of your product (e.g. will the customer still be able to use the URL)?
  • Brad McGarr McAfee Employee 155 posts since
    Dec 4, 2012
    Currently Being Moderated
    1. Feb 10, 2014 10:18 AM (in response to mhellman)
    Re: Clickprotect invalidating one-time use URLs?

    Hi mhellman,

     

    Yes, this is expected behavior as the system does pre-fetch and scan the destination of the URL as it passes through the service, and at click time. We understand this will cause problems with a minority of email-based URLs, but offers the best opportunity to catch malware, viruses, and phishing attacks.

     

    We do not at this time have an article about how this process causes one-time use only URLs to be invalidated, but I am in the process of writing one and will post the URL to that article as soon as it's published. The options for resolution are whitelisting the URL on the ClickProtect Allow List, or, disabling ClickProtect for specific users or the domain, the latter only being the recommended option if it's determined that the service is not compatable with a particular organization.

     

    Blocking access from the McAfee SaaS IP ranges would be very detrimintal to the user experience, as the system will not be able to complete the appropriate scan, and will return an error stating that we could not connect to either a broken, invalid, or local URL.


    Brad McGarr
    McAfee SaaS Email & Web Protection
    Technical Support Technician I (Legacy & Partner Support)
    Microsoft Certified Professional
    Microsoft Technology Associate - Windows OS | CompTIA A+ Certified Technician | CIW Web Foundations Associate
    Visit my blog: Brad's Corner - Insights from SaaS Email & Web Security Support https://community.mcafee.com/blogs/brad-denver

    Frequently Requested Information
  • bmhorsfall Newcomer 1 posts since
    Feb 20, 2014
    Currently Being Moderated
    2. Feb 20, 2014 2:42 PM (in response to Brad McGarr)
    Re: Clickprotect invalidating one-time use URLs?

    Brad, is it possible to add a domain to a global whitelist in your product, rather than having to have each customer do it individually?  if so, how would one go about doing that?  I certainly understand the reasons you would not want to make this easy to do.

     

    Your click protect software's burning of our links just prior to the customer clicking on a single use link, drives up calls to our support center, who don't really have the skills to troubleshoot this sort of problem.  Even if they did, I would bet a majority of the users who call in would not know their company's email is hosted by mxLogic or mcafee SaaS.  They just know their email address is joe@someplace.com.  They don't know that the email for someplace.com is hosted by Mcaffee.  Would they know how to whitelist our domain?

     

    We have other options available, we could could put warnings up on our site to not use MxLogic hosted email addresses for one time link functions, or that user's of mxLogic hosted email addresses should add our domain to their whitelist.  Again, I'm fairly certain most of our end users would not know their email was hosted by McAfee so this doesn't seem like it would be effective.   Also, making single use links "multi use" seems to defeat the purpose.

  • Brad McGarr McAfee Employee 155 posts since
    Dec 4, 2012
    Currently Being Moderated
    3. Feb 20, 2014 3:08 PM (in response to bmhorsfall)
    Re: Clickprotect invalidating one-time use URLs?

    Hi,

     

    The SaaS Service does not maintain any global allow-list, each customer is free and responsible for determining what risk they expose their network to (and an allow-list entry is a risk exposure). On top of that, the Sender Allow list does not affect ClickProtect, which uses a separate allow list based on the actual URL. The ClickProtect service, while valuable to most organizations, is not perfect for every organization. Each organization must evaluate each facet of the service and customize it to fit their needs: If ClickProtect does not work for their needs, each customer is free to disable it. That's why the product does not provision with ClickProtect enabled, specifically because it's not perfect for everyone. It's up to the Administration in any organization to weigh the pros and cons and enable the service, and unfortunately as an outside service there isn't much you can do about it, other than if they are using the service, and their admin has enabled the service, they should contact their internal help desk or IT consultant to either disable the service or find some resolution.

     

    A lot of organizations have actually turned away from using One-Time Use URLs that trigger an action immediately upon access to instead directing to a page that requires the end user to click a confirmation button to trigger the one-time-use action. A big motivator for that change has been the use of services like ClickProtect and other policies that scan what is linked to in a URL and thus trigger the URL.


    Brad McGarr
    McAfee SaaS Email & Web Protection
    Technical Support Technician I (Legacy & Partner Support)
    Microsoft Certified Professional
    Microsoft Technology Associate - Windows OS | CompTIA A+ Certified Technician | CIW Web Foundations Associate
    Visit my blog: Brad's Corner - Insights from SaaS Email & Web Security Support https://community.mcafee.com/blogs/brad-denver

    Frequently Requested Information

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