# Whitelisting for App

**URL:** <https://community.droneblocks.io/t/whitelisting-for-app/144>\
**Category:** DroneBlocks Support\
**Created:** [June 2, 2021, 8:27pm UTC](https://community.droneblocks.io/t/whitelisting-for-app/144 "2021-06-02T20:27:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![JGulrud](https://avatars.discourse-cdn.com/v4/letter/j/d26b3c/32.png) [@JGulrud](https://community.droneblocks.io/u/JGulrud)\
**Post date:** [June 2, 2021, 8:27pm UTC](https://community.droneblocks.io/t/whitelisting-for-app/144/1 "2021-06-02T20:27:16Z")

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We are attemtping to use the Droneblocks app with our Tello drones. The app loads, but never displays the “blocks” for coding on the side. If I switch the phones to an unfiltered status, bypassing our CipaFilter, the app loads fully. Is there a list of domains/addresses/IPs that I should be adding to our whitelist to allow the traffic to get through?

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**Author:** ![dbaldwin](https://avatars.discourse-cdn.com/v4/letter/d/d2c977/32.png) [@dbaldwin](https://community.droneblocks.io/u/dbaldwin)\
**Post date:** [June 4, 2021, 3:12pm UTC](https://community.droneblocks.io/t/whitelisting-for-app/144/2 "2021-06-04T15:12:33Z")

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Good question. Yes there are two main urls you need to whitelist:

[https://dev.droneblocks.io](https://dev.droneblocks.io)  
[https://fiery-inferno-4972.firebaseapp.com](https://fiery-inferno-4972.firebaseapp.com)

The latter is what we use for authentication if your or your students want to login and save drone missions. It’s not necessary if you just want to create drone programs and launch them. Let me know if you run into any problems and I’ll be glad to assist.

Thanks.