title: Nagios is active on CLI but not running on Web Interface
body: <p>Good morning,</p>
  
  <p>I have a problem with my Nagios configuration. This is the response of service nagios status :</p>
  
  <pre><code>    root@SRV-SUPERVISION-BT:~# service nagios status
  ● nagios.service - LSB: Starts and stops the Nagios monitoring server
     Loaded: loaded (/etc/init.d/nagios)
     Active: active (running) since ven. 2016-06-17 09:47:46 CEST; 41min ago
    Process: 458 ExecStart=/etc/init.d/nagios start (code=exited, status=0/SUCCESS)
     CGroup: /system.slice/nagios.service
             ├─533 /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios...
             ├─553 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/...
             ├─555 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/...
             ├─556 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/...
             ├─558 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/...
             ├─559 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/...
             ├─560 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/...
             └─623 /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios...
  
  juin 17 09:47:46 SRV-SUPERVISION-BT nagios[533]: nerd: Channel opathchecks r...y
  juin 17 09:47:46 SRV-SUPERVISION-BT nagios[533]: nerd: Fully initialized and...!
  juin 17 09:47:46 SRV-SUPERVISION-BT nagios[533]: wproc: Successfully registe...r
  juin 17 09:47:46 SRV-SUPERVISION-BT nagios[533]: wproc: Registry request: na...3
  juin 17 09:47:46 SRV-SUPERVISION-BT nagios[533]: wproc: Registry request: na...8
  juin 17 09:47:46 SRV-SUPERVISION-BT nagios[533]: wproc: Registry request: na...9
  juin 17 09:47:46 SRV-SUPERVISION-BT nagios[533]: wproc: Registry request: na...6
  juin 17 09:47:46 SRV-SUPERVISION-BT nagios[533]: wproc: Registry request: na...0
  juin 17 09:47:46 SRV-SUPERVISION-BT nagios[533]: wproc: Registry request: na...5
  juin 17 09:47:48 SRV-SUPERVISION-BT nagios[533]: Successfully launched comma...3
  Hint: Some lines were ellipsized, use -l to show in full.
  </code></pre>
  
  <p>But when I'm going on the web interface, Nagios Core is not running.</p>
  
  <p><a href="https://i.stack.imgur.com/VNOOB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VNOOB.png" alt="Nagios Web interface not running screenshot"></a></p>
  
  <p>The configtest command is also right :</p>
  
  <pre><code>root@SRV-SUPERVISION-BT:~# service nagios configtest
  
  Nagios Core 4.1.1
  Copyright (c) 2009-present Nagios Core Development Team and Community Contributors
  Copyright (c) 1999-2009 Ethan Galstad
  Last Modified: 08-19-2015
  License: GPL
  
  Website: https://www.nagios.org
  Reading configuration data...
     Read main config file okay...
     Read object config files okay...
  
  Running pre-flight check on configuration data...
  
  Checking objects...
      Checked 8 services.
      Checked 1 hosts.
      Checked 1 host groups.
      Checked 0 service groups.
      Checked 1 contacts.
      Checked 1 contact groups.
      Checked 24 commands.
      Checked 5 time periods.
      Checked 0 host escalations.
      Checked 0 service escalations.
  Checking for circular paths...
      Checked 1 hosts
      Checked 0 service dependencies
      Checked 0 host dependencies
      Checked 5 timeperiods
  Checking global event handlers...
  Checking obsessive compulsive processor commands...
  Checking misc settings...
  
  Total Warnings: 0
  Total Errors:   0
  
  Things look okay - No serious problems were detected during the pre-flight check
  Object precache file created:
  /usr/local/nagios/var/objects.precache
  </code></pre>
  
  <p>Also, this is the right of my /usr/local/nagios/var:</p>
  
  <pre><code>root@SRV-SUPERVISION-BT:/usr/local/nagios/bin# ls /usr/local/nagios/var -l
  total 88
  drwxrwsr-x 2 nagios nagios  4096 juin  16 23:59 archives
  -rw-r--r-- 1 nagios nagios    34 juin  17 11:00 nagios.configtest
  -rw-r--r-- 1 nagios nagios     4 juin  17 09:47 nagios.lock
  -rw-r--r-- 1 nagios nagios  3007 juin  17 10:47 nagios.log
  -rw-r--r-- 1 nagios nagios 12665 juin  17 09:47 objects.cache
  -rw-r--r-- 1 nagios nagios 12665 juin  17 11:00 objects.precache
  -rw------- 1 nagios nagios 13062 juin  17 10:47 retention.dat
  drwxrwsr-x 2 nagios nagcmd  4096 juin  17 09:47 rw
  drwxr-sr-x 3 root   nagios  4096 juin   3 08:28 spool
  -rw-rw-r-- 1 nagios nagios 13485 juin  17 11:26 status.dat
  </code></pre>
  
  <p>I'm on Debian : </p>
  
  <pre><code>    root@SRV-SUPERVISION-BT:~# uname -a
  Linux SRV-SUPERVISION-BT 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt25-2 (2016-04-08) x86_64 GNU/Linux
  </code></pre>
  
  <p>I do not understand the problem. If anyone can help me, thanks in advance.</p>