Inappropriate Acess for Nagiosxi - Nagios Core Services Platform https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/ Nagios Core Services Platform Discussion Board - Open Source Powered Monitoring en-US Sun, 13 Sep 2026 10:47:40 +0000 wpForo 60 RE: Inappropriate Acess for Nagiosxi https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/paged/2/#post-2576 Tue, 13 May 2025 15:32:27 +0000 For the level of support with a step by step basis it may be best for you to open up a ticket with support. You can do so here.
https://support.nagios.com/

]]> Nagios Core Services Platform Sandor https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/paged/2/#post-2576 RE: Inappropriate Acess for Nagiosxi https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/paged/2/#post-2575 Tue, 13 May 2025 10:45:08 +0000 Yes I tried using hostname of my vm ,but it gave me error as 404

Not Found

The requested URL was not found on this server.                                                        Apache/2.4.41 (Ubuntu) Server at 34.147.128.126 Port 80

Please provide me step by step procedure to solve this issue, I even tried disbaling sudo a2dismod security2 , but it did n't work , I am trying to acess external ip then it is forwarding to Nagiosxi welcome page but after that It is giving me inavlid host header after clicking on acess

]]> Nagios Core Services Platform Shrey_02 https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/paged/2/#post-2575 RE: Inappropriate Acess for Nagiosxi https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/#post-2573 Mon, 12 May 2025 15:46:12 +0000 Did you try going in via a host name instead of an ip address? 

]]> Nagios Core Services Platform jmichaelson https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/#post-2573 RE: Inappropriate Acess for Nagiosxi https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/#post-2567 Fri, 09 May 2025 22:37:47 +0000 Please let me know @jmichaelson what to do ,as I  tried on acessing in external IP as well but nagiosxi is not acessible ,so please provide me step by step solution for invalid host header 

]]> Nagios Core Services Platform Shrey_02 https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/#post-2567 RE: Inappropriate Acess for Nagiosxi https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/#post-2562 Thu, 08 May 2025 15:38:07 +0000 I tried nagiosxi at http://<external ip>/nagiosxi but still shows the same error

]]> Nagios Core Services Platform Shrey_02 https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/#post-2562 RE: Inappropriate Acess for Nagiosxi https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/#post-2561 Thu, 08 May 2025 15:10:50 +0000 From this forum post:

For the "Invalid Host Header" issue -- this is caused by new security measures added in this release to prevent host header injection attacks. Values that are considered "valid" for your host value are the IP address of the server as you noted, as well as "localhost" and the value you input for your "External URL" (located on the General tab of System Settings).

If you need to in order to get to the settings page, try going in via the host name instead of the ip address.

]]> Nagios Core Services Platform jmichaelson https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/#post-2561 Inappropriate Acess for Nagiosxi https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/#post-2560 Thu, 08 May 2025 15:02:48 +0000 Hi I have installed nagios csp on a fresh ubuntu vm by following documentation ,but I am still not able to acess the url. It shows "Invalid Host Header" .I have attached the file below

]]> Nagios Core Services Platform Shrey_02 https://www.nagios.org/community/nagios-forum/inappropriate-acess-for-nagiosxi/#post-2560