# Authentication ACS \<-\> CPE v1.2

**URL:** <https://forum.genieacs.com/t/authentication-acs-cpe-v1-2/447>\
**Category:** Uncategorized\
**Created:** [November 13, 2019, 1:10pm UTC](https://forum.genieacs.com/t/authentication-acs-cpe-v1-2/447 "2019-11-13T13:10:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Geiser](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.genieacs.com/geiser/32/10_2.png) [@Geiser](https://forum.genieacs.com/u/Geiser)\
**Post date:** [November 13, 2019, 1:10pm UTC](https://forum.genieacs.com/t/authentication-acs-cpe-v1-2/447/1 "2019-11-13T13:10:23Z")

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I haven’t yet found how to authenticate both ways (ACS → CPE and CPE → ACS) in v1.2 of GenieACS. And it doesn’t help that [CPE Authentication — GenieACS Documentation 1.2.9 documentation](http://docs.genieacs.com/en/latest/cpe-authentication.html) isn’t written.

In the release at GitHub, it is stated that

> “the connection request authentication behavior can now be customized using an ‘expression’.”

Which expression?

Thank you

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**Author:** ![zaidka](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.genieacs.com/zaidka/32/9_2.png) [@zaidka](https://forum.genieacs.com/u/zaidka)\
**Post date:** [November 23, 2019, 8:57pm UTC](https://forum.genieacs.com/t/authentication-acs-cpe-v1-2/447/2 "2019-11-23T20:57:11Z")

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See my answer here: [Incorrect connection request credentials (v1.2)](https://forum.genieacs.com/t/incorrect-connection-request-credentials-v1-2/240/3)

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**Author:** ![jeancarlosgnu](https://avatars.discourse-cdn.com/v4/letter/j/4491bb/32.png) [@jeancarlosgnu](https://forum.genieacs.com/u/jeancarlosgnu)\
**Post date:** [March 24, 2021, 1:37am UTC](https://forum.genieacs.com/t/authentication-acs-cpe-v1-2/447/3 "2021-03-24T01:37:52Z")

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Hi @zaidka thanks for your help.

Before using the configuration with the authentication method that you propose, I got the following error:  
**Connection request error: Incorrect connection request credentials**

 ![Credenciales incorrectas](https://canada1.discourse-cdn.com/flex035/uploads/genieacs/original/1X/c0803c5e9355603da0084c1bebc0c08dfa8631ea.jpeg)

After implementing the authentication method that you propose, I get the following error:  
**No contact from CPE**

> **[autenticacion implementada — Postimages](https://postimg.cc/XX1ZPqsh)**

It seems that the authentication works, but for some reason the parameters are not being obtained from the CPE

my cpe, they have the following configuration for TR69  
link with all screenshots : [geniacs — ImgBB](https://ibb.co/album/bzsbkp)

I appreciate any support you can give me