# Failed to connect Ignition OPC-UA server using Sign And Encrypt mechanism via Python OPC-UA client

**URL:** <https://forum.inductiveautomation.com/t/failed-to-connect-ignition-opc-ua-server-using-sign-and-encrypt-mechanism-via-python-opc-ua-client/16865>\
**Category:** Ignition\
**Tags:** ignition79\
**Created:** [February 4, 2018, 9:12am UTC](https://forum.inductiveautomation.com/t/failed-to-connect-ignition-opc-ua-server-using-sign-and-encrypt-mechanism-via-python-opc-ua-client/16865 "2018-02-04T09:12:29Z")\
**Posts on this page:** 1\
**Showing post:** 7

<div class="post-metadata">

**Author:** ![Hari\_GB](https://avatars.discourse-cdn.com/v4/letter/h/7ab992/32.png) [@Hari\_GB](https://forum.inductiveautomation.com/u/Hari_GB)\
**Post date:** [July 4, 2022, 1:44pm UTC](https://forum.inductiveautomation.com/t/failed-to-connect-ignition-opc-ua-server-using-sign-and-encrypt-mechanism-via-python-opc-ua-client/16865/7 "2022-07-04T13:44:55Z")

</div>

Hi @Kevin.Herron, I am using the freeopcua python library as client to connect with ignition opc UA server. I could able to download the server certificate(.der file) from gateway but still not sure where to get the server private key (.pem).  
python documentation:

 ![SmartSelect_20220704-191314_Bromite](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/b/0b9c3b3e7b722e5dbead995d1ba172abdfb26161.jpeg)

Thanks,

---

_[View the full topic](https://forum.inductiveautomation.com/t/failed-to-connect-ignition-opc-ua-server-using-sign-and-encrypt-mechanism-via-python-opc-ua-client/16865)._