Apache2 Mod_proxy Error 500
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500 Internal Server Error Reverse Proxy
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No Protocol Handler Was Valid For The Url
Join them; it only takes a minute: Sign up Application error passthru when using apache mod_proxy up vote 2 down vote favorite Heyas. I'm using mod_proxy with apache2 provide vhost ability to multiple servlet apps running on the local
Mod_proxy_http
machine. It works fine, for the most part. Requests come into apache then are directed to the application bound on a port on localhost. The app receives the request and responds, which is delivered back to the client by apache. The problem I'm having is that the application delivers 500's on errors, and mod_proxy stomps on them. Often these errors are caused in a ajax request and the error is handled in client side javascript. For example, a sslproxyengine call to a server side createObject(name) might throw a NameNotUniqueException , which is delivered back as a 500. The client javascript might then display an appropriate error message. When an error is thrown by the application (resulting in a 500 response to mod_proxy), then apache stomps the error message and returns 500 Internal Server Error Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. .. the stock apache server side error message. I want mod_proxy to pass the original 500 back through to the client. Is there a directive I've missed which prevents clobbering of the 500? TIA apache mod-proxy share|improve this question asked Mar 28 '10 at 4:26 Andrew Taylor 52869 What about using mod_proxy_ajp or mod_jk? Seems to me they are more tailored to connecting Apache to servlets. –Jackson Miller Mar 28 '10 at 5:51 good suggestion. The app is a standalone jetty powered dyn web engine. Perhaps I should look at jetty ajp connections. –Andrew Taylor Mar 28 '10 at 7:06 Hmm, mod_proxy seems to be the preferred method (docs.codehaus.org/display/JETTY/Configuring+AJP13+Using+mod_jk). As such, I'm surprised I've found no solution for this issue. –Andrew Taylor Mar 28 '10 at 7:19 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote accepted Do you have ProxyRequests Off ProxyErrorOverride Off ProxyPass /path/ http://backend.ip/path/ Prox
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the proxypass https company Business Learn more about hiring developers or posting ads with us Stack Overflow 500 proxy error Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 error during ssl handshake with remote server million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Setup mod_proxy on apache http server up vote 41 down vote favorite 12 I wanted to reverse proxy a http://stackoverflow.com/questions/2531895/application-error-passthru-when-using-apache-mod-proxy web service from my tomcat server using apache web server. I have modified the httpd.conf LoadModule proxy_module modules/mod_proxy.so
In submit Tutorials Questions Projects Meetups Main Site logo-horizontal DigitalOcean Community Menu Tutorials Questions Projects Meetups Main Site Sign Up Log In submit View All Results By: Justin Ellingwood Subscribe Subscribed Share Contents https://www.digitalocean.com/community/tutorials/how-to-configure-apache-to-use-custom-error-pages-on-ubuntu-14-04 Contents We hope you find this tutorial helpful. In addition to guides like this one, we provide simple cloud infrastructure for developers. Learn more → 6 How To Configure Apache to Use Custom Error Pages https://samhobbs.co.uk/2013/10/beware-apache2-mod_proxy on Ubuntu 14.04 Posted Jun 9, 2015 44.8k views Apache Ubuntu Introduction Apache is the most popular web server in the world. It is well-supported, feature-rich, and flexible. When designing your web pages, it is 500 internal often helpful to customize every piece of content that your users will see. This includes error pages for when they request content that is not available. In this guide, we'll demonstrate how to configure Apache to use custom error pages on Ubuntu 14.04. Prerequisites To get started on with this guide, you will need a non-root user with sudo privileges. You can set up a user of this type by 500 internal server following along with our initial set up guide for Ubuntu 14.04. You will also need to have Apache installed on your system. Learn how to set this up by following the first step of this guide. Creating Your Custom Error Pages We will create a few custom error pages for demonstration purposes, but your custom pages will obviously be different. We will put our custom error pages in the /var/www/html directory where Ubuntu's Apache installation sets its default document root. We'll make a page for 404 errors called custom_404.html and one for general 500-level errors called custom_50x.html. You can use the following lines if you are just testing. Otherwise, put your own content in these locations:
- echo "
Error 404: Not found :-(
" | sudo tee /var/www/html/custom_404.html - echo "
I have no idea where that file is, sorry. Are you sure you typed in the correct URL?
" | sudo tee -a /var/www/html/custom_404.html - echo "
Oops! Something went wrong...
" | sudo tee /var/www/html/custom_50x.html - echo "
We seem to be having some technical difficulties. Hang tight.
" | sudo tee -a /var/www/html/custom_50x.html We now have two custom error pages that we can serve when client requests result in different errors. Configuring Apache to Usthe settings for my site, I discovered an Apache module called mod_proxy. I was interested in it because I am running two webservers – one for www.samhobbs.co.uk and one for webmail, and I wanted to redirect traffic from one part of the site to the webmail server using ProxyPass. Unfortunately, I was over-enthusiastic in my explorations and made an error: I enabled my server to be used as an open proxy, and attracted thousands and thousands of dodgy requests from around the world. What this meant is that anyone could connect to my server and use it to visit web pages whilst concealing their true identity: the pages visited would only see my IP, not theirs. What I did wrong. What I did was stupid, embarrassingly so. It wouldn’t have happened if I had read the manual, or even just paid attention to the useful information in the config files. On Debian and Ubuntu systems, the settings for mod_proxy are located here: /etc/apache2/mods-enabled/proxy.conf, and look something like this:
# If you want to use apache2 as a forward proxy, uncomment the # 'ProxyRequests On' line and the Line 13 was the unlucky one here. You don’t need to enable ProxyRequests to use ProxyPass, but I naively changed line 13 to ProxyRequests on, and didn’t even restrict its usage. Note that the config file actually warns against doing this – it was really stupid. Anddd… hey presto: my RasPi was now an open proxy ready to be exploited by the world’s tech savvy miscreants and script kiddies. Some Signs that your server is being used as an open proxy: The time it took me from changing the setting to realising something was wrong was about a week. The number of requests wblock below. # WARNING: Be careful to restrict access inside the block. # Open proxy servers are dangerous both to your network and to the # Internet at large. # # If you only want to use apache2 as a reverse proxy/gateway in # front of some web application server, you DON'T need # 'ProxyRequests On'. ProxyRequests off # # AddDefaultCharset off # Order deny,allow # Deny from all # #Allow from .example.com # # Enable/disable the handling of HTTP/1.1 "Via:" headers. # ("Full" adds the server version; "Block" removes all outgoing Via: headers) # Set to one of: Off | On | Full | Block #ProxyVia Off