What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.

At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.

We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.

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    Our 3rd party proxy is blocking your site.

    Asked by kpowers on January 16, 2012 at 03:01 PM

    What IP addresses should I have our firewall team allow Port 80 access to as they block port 80 outbound from our network.



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    Answered by fxr on January 16, 2012 at 03:25 PM

    I will assigned this 2nd level to confirm exactly what IP addresses you need to allow access to. 

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    Answered by kpowers on January 16, 2012 at 04:13 PM

    Great, thank you.

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    JotForm Founder

    Answered by aytekin on January 19, 2012 at 02:29 AM

    We are using a DNS based security proxy called CloudFlare. So, our IP addresses always change. This is what I found:


    CloudFlare uses the following IPv4 address ranges: ( - ( - ( - ( - ( - ( - ( -


    CloudFlare uses the following IPv6 address ranges:

    2400:CB00:/32 (2400:CB00:0000:0000 - 2400:CB00:FFFF:FFFF)

    2606:4700::/32 (2606:4700:0000:0000 - 2606::4700:FFFF:FFFF)