Frequently Asked Questions About Linux / UNIX » Nginx

Nginx Redirect URL With HTTP/1.1 301 Moved Permanently Header

Vivek Gite — Fri, 15 Jul 2011 11:03:46 +0000

How do I redirect old ugly urls such as http://example.com/store/view.jsp?product=foo with clean url - http://example.com/store/view/product/foo using nginx reverse proxy?

Nginx: 413 Request Entity Too Large Error and Solution

Vivek Gite — Tue, 12 Jul 2011 08:29:39 +0000

I'm running nginx as a frond end to php based Apache+mod_fastcgi server. My app lets user upload images upto 2MB in size. When users trying to upload 1.5MB+ size image file using nginx reverse proxy, they are getting the following error on screen:

Nginx 413 Request Entity Too Large

How do I fix this problem and allow image upload upto 2MB in size?

HowTo: Merge Apache / Lighttpd / Nginx Server Log Files

Vivek Gite — Wed, 23 Feb 2011 13:07:10 +0000

My ecommerce site runs using a cluster of Apache web server. The cluster is behind nginx load balancer. I want to merge backend Apache web server log files for statistics purpose. How do I mere web server log files under Linux / UNIX like operating systems using cron jobs? You need to use logresolvemerge Perl [...]

Mediawiki Fix Internal Server Host Names / Redirection In shared Hosting or Proxy Setup

Vivek Gite — Sun, 19 Dec 2010 21:57:17 +0000

Our customer support wiki runs on an internal host (ip:192.168.1.100:300, hostname a-node100.:300) and it is behind the nginx reverse proxy server. However, our Apache server end up displaying internal server name http://a-node100.:300/, which results into an unexpected redirection and timeouts as http://a-node100.:300/ is not accessible over the Internet. How do I force nginx or apache to use the base URL of our server (http://support.example.com/wiki/)?

nginx: Create HTTP 503 Maintenance Custom Page

Vivek Gite — Wed, 08 Dec 2010 12:21:59 +0000

I know how to create a custom http 503 maintenance page under Lighttpd or Apache web server. How do I create a custom Nginx web server maintenance page?

WordPress Rename Image URL For a CDN Usage

Vivek Gite — Sat, 20 Nov 2010 20:41:47 +0000

Recently, we moved all our static assets to a CDN as described here. However, we have over 8000+ old blog posts and we need to point static images url to our CDN account hosted at http://MyACCOUNT.cloudfront.net/images/ folder. How do I rename all image urls stored in wordpress posts? How do I offload static images to a CDN urls under Wordpress?

NGINX: Create Custom 404 / 403 Error Page

Vivek Gite — Wed, 17 Nov 2010 19:39:27 +0000

How do I create a custom static HTTP 404 or HTTP 403 error page under nginx web server?

nginx: Install GeoIP Module For Country / City Level Geo Targeting

Vivek Gite — Tue, 05 Oct 2010 05:10:46 +0000

How do I install GeoIP nginx module for country and/or city level geo targeting?

Nginx: Configure and Install With IPv6 Networking Support

Vivek Gite — Thu, 22 Jul 2010 01:52:06 +0000

How do I configure IPv6 networking under nginx? How do I assign and use an IPv6 address under nginx web server? How do I enable IPv6 Support in nginx?

nginx: Send HTTP User Agent Requests To Specific Backend Server

Vivek Gite — Fri, 16 Jul 2010 01:10:56 +0000

I've tons of images, css and javascript hosted at backend server IP 192.168.1.5 and 192.168.1.6. How do I make sure nginx reverse proxy load balancer always send all http_user_agent requests coming from "Mozilla" to server 192.168.1.5 and MSIE to server 192.168.1.6 only?

Nginx: 24: Too Many Open Files Error And Solution

Vivek Gite — Thu, 06 May 2010 06:58:11 +0000

I'm getting the following error in my nginx server error log file:

2010/04/16 13:24:16 [crit] 21974#0: *3188937 open() "/usr/local/nginx/html/50x.html" failed (24: Too many open files), client: 88.x.y.z, server: example.com, request: "GET /file/images/background.jpg HTTP/1.1", upstream: "http://10.8.4.227:81//file/images/background.jpg", host: "example.com"

How do I fix this problem under CentOS / RHEL / Fedora Linux or UNIX like operating systems?

Nginx: Custom Error 403 Page Not Working with IP Deny Configuration

Vivek Gite — Wed, 14 Apr 2010 09:10:44 +0000

I block or deny access based on the host name or IP address of the client visiting website under nginx web server. I want to display customized e403.html error page, but it doesn't appear to be working. Nginx always displays the built-in, hardcoded "403 Forbidden" error message. Here is my configuration:

.....
  ...
 deny 1.2.3.4;
 deny 91.212.45.0/24;
 deny 91.212.65.0/24;
 .....
 ...
 error_page 403 /e403.html;
        location = /e403.html {
           root   html;
       }

How do I fix this problem and display custom error 403 page under nginx server?

Linux nginx: Chroot (Jail) Setup

Vivek Gite — Tue, 06 Apr 2010 09:34:53 +0000

How do I run Nginx web server in a chroot (jail) so that I can minimizes the damage done by a potential break-in by isolating the web server to a small section of the filesystem?

nginx: Setup SSL Reverse Proxy (Load Balanced SSL Proxy)

Vivek Gite — Thu, 01 Apr 2010 12:27:07 +0000

A reverse proxy is a proxy server that is installed in a server network. Typically, reverse proxies are used in front of Web servers such as Apache, IIS, and Lighttpd. How do I setup nginx web server as SSL reverse proxy?

nginx: Send Custom HTTP Headers

Vivek Gite — Mon, 15 Mar 2010 10:47:17 +0000

How do I send or set arbitrary HTTP headers using nginx web server?

Handling nginx Failover With KeepAlived

Vivek Gite — Thu, 25 Feb 2010 08:34:55 +0000

How do configure to release and obtain VIP (virtual IP) when nginx is dead, down or system is rebooted for the kernel upgrades?

CentOS / Redhat: Install nginx As Reverse Proxy Load Balancer

Vivek Gite — Wed, 24 Feb 2010 20:40:47 +0000

How do I configure nginx as failover reverse proxy load balancer in front of two Apache web servers under CentOS / RHEL 5.x?

CentOS / Redhat Linux: Install Keepalived To Provide IP Failover For Web Cluster

Vivek Gite — Sun, 21 Feb 2010 10:18:12 +0000

Keepalived provides a strong and robust health checking for LVS clusters. It implements a framework of health checking on multiple layers for server failover, and VRRPv2 stack to handle director failover. How do I install and configure Keepalived for reverse proxy server such as nginx or lighttpd?

mod_extforward: Lighttpd Log Clients Real IP Behind Reverse Proxy / Load Balancer

Vivek Gite — Mon, 01 Feb 2010 12:43:40 +0000

I've setup 5 lighttpd web servers behind Nginx based reverse proxy / load balancer to distribute load for busy e-commerce website. However, all web server nodes putting my load balncers two IP address in access log file. How do I force lighttpd to log a real IP (public IP) address of all client computers visiting our website?

Nginx Force (Redirect) WWW.Domain.COM To Domain.COM

Vivek Gite — Wed, 13 Jan 2010 08:11:36 +0000

I know how to force and redirect www.example.com to example.com under Lighttpd web server. How do I force nginx web server to redirect www.example.com/page/1/2/3 to example.com/page/1/2/3?