# How to blacklist the devices connected in ONT?

**URL:** <https://forum.genieacs.com/t/how-to-blacklist-the-devices-connected-in-ont/2133>\
**Category:** Uncategorized\
**Created:** [October 28, 2021, 4:55am UTC](https://forum.genieacs.com/t/how-to-blacklist-the-devices-connected-in-ont/2133 "2021-10-28T04:55:20Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Shrawan](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.genieacs.com/shrawan/32/1467_2.png) [@Shrawan](https://forum.genieacs.com/u/Shrawan)\
**Post date:** [October 28, 2021, 4:55am UTC](https://forum.genieacs.com/t/how-to-blacklist-the-devices-connected-in-ont/2133/1 "2021-10-28T04:55:20Z")

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![WLAN_hosts](https://canada1.discourse-cdn.com/flex035/uploads/genieacs/original/1X/c72efe10078c5e21641fd310a398aaa40fc9a7f5.png)

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**Author:** ![Shrawan](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.genieacs.com/shrawan/32/1467_2.png) [@Shrawan](https://forum.genieacs.com/u/Shrawan)\
**Post date:** [October 28, 2021, 4:56am UTC](https://forum.genieacs.com/t/how-to-blacklist-the-devices-connected-in-ont/2133/2 "2021-10-28T04:56:54Z")

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Can we blacklist this device via Genieacs GUI?

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**Author:** ![akcoder](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.genieacs.com/akcoder/32/11_2.png) [@akcoder](https://forum.genieacs.com/u/akcoder)\
**Post date:** [October 28, 2021, 3:44pm UTC](https://forum.genieacs.com/t/how-to-blacklist-the-devices-connected-in-ont/2133/3 "2021-10-28T15:44:21Z")

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You can require authentication.

> [@CPE authentication with 1.2.3](https://forum.genieacs.com/t/cpe-authentication-with-1-2-3/1369):
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> Has anyone got any info or examples on how to enable cpe to acs authentication using multiple usernames and passwords? I currently do this with Nginx but was hoping to find a way to do this directly with Genieacs. I see [here](http://docs.genieacs.com/en/latest/cpe-authentication.html) in the install guide that you can have a single static user/pass or use the EXT() function. " The EXT() function makes it possible to call an [extension](http://docs.genieacs.com/en/latest/extensions.html#extensions) script from the auth expression. This can be used to fetch the credentials from an external source:" I’m looking for exampl…

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<div class="post-metadata">

**Author:** ![Shrawan](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.genieacs.com/shrawan/32/1467_2.png) [@Shrawan](https://forum.genieacs.com/u/Shrawan)\
**Post date:** [November 1, 2021, 8:59am UTC](https://forum.genieacs.com/t/how-to-blacklist-the-devices-connected-in-ont/2133/5 "2021-11-01T08:59:24Z")

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Thanks but my concern is can we kick the connected device from ONT.