[Observium] observium behind a nginx reverse proxy

3 Jul 2025


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Hello
i m trying to access to observium under a reverse proxy , but after 
login i have a page with some unauthenticated as token is not get
vm with observium
OS : DEBIAN 12.11
observium version :     CE 24.12.13800
apache version :
Server version: Apache/2.4.62 (Debian)
Server built:   2024-10-04T15:21:08
Server's Module Magic Number: 20120211:134
Server loaded:  APR 1.7.2, APR-UTIL 1.6.3, PCRE 10.42 2022-12-11
Compiled using: APR 1.7.2, APR-UTIL 1.6.3, PCRE 10.42 2022-12-11
Architecture:   64-bit
Server MPM:
Server compiled with....
  -D APR_HAS_SENDFILE
  -D APR_HAS_MMAP
  -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
  -D APR_USE_PROC_PTHREAD_SERIALIZE
  -D APR_USE_PTHREAD_SERIALIZE
  -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
  -D APR_HAS_OTHER_CHILD
  -D AP_HAVE_RELIABLE_PIPED_LOGS
  -D DYNAMIC_MODULE_LIMIT=256
  -D HTTPD_ROOT=&quot;/etc/apache2&quot;
  -D SUEXEC_BIN=&quot;/usr/lib/apache2/suexec&quot;
  -D DEFAULT_PIDLOG=&quot;/var/run/apache2.pid&quot;
  -D DEFAULT_SCOREBOARD=&quot;logs/apache_runtime_status&quot;
  -D DEFAULT_ERRORLOG=&quot;logs/error_log&quot;
  -D AP_TYPES_CONFIG_FILE=&quot;mime.types&quot;
  -D SERVER_CONFIG_FILE=&quot;apache2.conf&quot;
host config :
     SetEnvIf X-Forwarded-Proto &quot;https&quot; HTTPS=on
ServerName observium.pra.rip
     DocumentRoot /opt/observium/html
SetHandler application/x-httpd-php
Options FollowSymLinks
             AllowOverride None
DirectoryIndex index.php
             Options Indexes FollowSymLinks MultiViews
             AllowOverride All
             Require all granted
Header always set Strict-Transport-Security &quot;max-age=31536000 
; includeSubDomains; preload&quot;
vm with nginx reverse proxy
OS : DEBIAN 12.11
nginx version : 1.22.1
nginx config
         location / {
                     proxy_pass https://observium.pra.rip;
                     proxy_http_version 1.1;
                     proxy_buffering    off;
# Forward headers
                     proxy_set_header   Host              $host;
                     proxy_set_header   X-Real-IP         $remote_addr;
                     proxy_set_header   X-Forwarded-For   
$proxy_add_x_forwarded_for;
                     proxy_set_header   X-Forwarded-Proto $scheme;
                     proxy_set_header   Upgrade           $http_upgrade;
                     proxy_set_header   Connection        
$connection_upgrade;
#proxy_pass_header  Set-Cookie;
                     #proxy_cookie_path  / /;
                     proxy_set_header   Cookie            $http_cookie;
         }
location ~* .(css|js|png|jpe?g|gif|svg|woff2?|ttf|ico)$ {
                     proxy_pass https://observium.pra.rip;
                     proxy_cache_valid    200 1h;
                     proxy_buffering      off;
                     access_log           off;
         }
location /rrd/ {
                     proxy_pass https://observium.pra.rip;
                     proxy_buffering      off;
         }
session :
ls -alh /var/lib/php/sessions/
total 24K
drwx-wx-wt 2 www-data www-data 4,0K  3 juil. 11:42 .
drwxr-xr-x 4 root     root     4,0K 10 févr.  2022 ..
-rw------- 1 www-data www-data  386  3 juil. 11:38 
sess_0fsi1vaqlf1i5mugqorbjlp406
-rw------- 1 www-data www-data  260  3 juil. 11:55 
sess_77ke2t0qmh7oblc2a5cpthb5ca
-rw------- 1 www-data www-data  314  3 juil. 11:55 
sess_bb5ldiapf9cduuq3sdimjcor89
-rw------- 1 www-data www-data  260  3 juil. 11:47 
sess_tb76ik3uh5v3m2a1594vcditho
cat /var/lib/php/sessions/sess_77ke2t0qmh7oblc2a5cpthb5ca
starttime|i:1751533673;auth_mechanism|s:5:&quot;mysql&quot;;requesttoken|s:64:&quot;2d66205c8928de04e12ef2c8b0cfbab3b6233b52c7e84e7718679abd4cb6fc2f&quot;;ua|s:32:&quot;ca86b008fc3e2c3d301606d50a2f120e&quot;;theme|s:5:&quot;light&quot;;mode|s:5:&quot;light&quot;;PREV_REMOTE_ADDR|s:22:&quot;2a01:e0a:1ef:7591::203&quot;;
you can see the screenshot observium_behind_reverse_proxy.png at 
https://nxt.pra.rip/s/KMBojmYpHb2Z8KE
info with and without  :
                     #proxy_pass_header  Set-Cookie;
                     #proxy_cookie_path  / /;
=&gt; give the same result / issue
=&gt; no problem with dns , i use views (internal name is the observium 
server , reverse proxy have an other name, external name observium 
pointing to reverse proxy, observium server is unknown)
What is wrong in my config ?
thank you for your help
pra
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