External authentication does not work with module NagVis

[Baboon92]

Expected Behavior

Starting a remote session should log you in icingaweb2 and NagVis via apache/httpd.

Current Behavior

Once a remote session starts, logging in via auto-login in icingaweb2, NagVis throws back a not authenticated message. log in as admin in icingaweb2, but the module NagVis does not authenticate

# vi /etc/httpd/conf.d/icingaweb2.conf
...
RewriteBase /icingaweb2/
RewriteCond %{REMOTE_ADDR} ^127\.0\.0\.1
RewriteRule ^(.*)$ - [E=REMOTE_USER:icingaadmin]
...

# vi /etc/icingaweb2/authentication.ini
[External]
backend = "external"

`

Your Environment

• Module version (System - About): nagvis-1.9.13
• Icinga Web 2 version and modules (System - About): latest
• Icinga 2 version (icinga2 --version): latest
• Operating System and version:
• Webserver, PHP versions: latest

[Baboon92]

I recognised the same issue already exists in #35.