Can Portal be configured without CA certificate?

[Ángel_DanielSuárez_Calero]

Hi Friends, I have installed Portal for ArcGIS but I need configure it. Would there be any way to configure Portal for ArcGIS without needing a CA certificate? 

Thanks and Regards! 

[JonathanQuinn]

Certificates are primarily about trust, (aside from certificate mismatch and expired certificate related problems). If you want to use a self-signed certificate, any clients need to trust the certificate, for example by importing the certificate into the trusted root certificate store. Since all clients need to explicitly trust self-signed certificates, the recommendation is to use a certificate from a well-known certificate authority, or a certificate signed by your domain signing authority.

[ShaneMiles]

Hi Ángel Daniel Suárez Calero‌, 

The underlying reason for using trusted CA signed certificate over self signed certificate that comes with the portal, is that the trusted signature provides a security mechanism that allows a client application to verify the identity of the server it is talking to - thereby mitigating against unauthorised interception of client communication. Any certificate errors seen when using Self Signed certificates is a side effect of security mechanism being violated. All of Esri's documentation strongly recommends the use of CA certificates, an example can be found here -Import a certificate into the portal—Portal for ArcGIS (10.7 and 10.7.1) | Documentation for ArcGIS ....  I hope this has helped answer your question. 

Shane