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Server Web App Gallery Microsoft Azure Tools Visual Studio Expression Studio Windows Internet Explorer WebMatrix Web Platform Installer Get Help: Ask a Question in our Forums More Help Resources Blogs Forums HomeLearnExtensionsChapter 3. Configuring Application Request Routing how to fix 502 proxy error (ARR)Creating a Forward Proxy Using Application Request Routing Creating a Forward Proxy Using

502 Proxy Error Apache

Application Request Routing By Jim van de ErveJune 11, 2014This article will show you how to use the Application Request 502 proxy error the proxy server received an invalid response from an upstream server Routing (ARR) and URL Rewrite features of Internet Information Services (IIS) to implement a forward proxy server. Overview Application Request Routing is a feature of IIS that enables you to control Internet traffic proxy error reading from remote server using a proxy server. A proxy server acts as a single point of contact serving clients on the request side or Web server workers on the response side. On the request side, the proxy accepts a request from one of multiple clients, and forwards it to the Internet. To the Internet the request appears to be coming from the proxy, rather than from the client. On the

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response side, the proxy accepts a request from the Internet, and distributes it to one of multiple workers. To the Internet the request appears to be processed and a response appears to be generated by the proxy server itself, rather than from one of the backend workers. The first type of proxy server, the one that handles an outbound request from a client, forwards it to the Internet, and returns the generated response to the client, is called a forward proxy. The second type of proxy server, the one that handles an incoming request from the Internet, forwards it to a backend worker, and returns the response to the Internet, is called a reverse proxy. Forward proxies and reverse proxies have significantly different functions, but they both do the same fundamental action of serving as the proxy for a requester or responder. In both cases, the proxy server isolates the private network from the Internet, enabling you to take measures to improve security. In both cases, the proxy processes requests and responses, enabling it to perform operations on the traffic that can improve performance by using caching or compression, guard against attacks, and filter information. ARR

Web Platform Installer Get Help: Ask a Question in our Forums More Help Resources Blogs Forums Home IIS.NET Forums IIS 5 & IIS 6 Troubleshooting Intermittent 502 Proxy Error Intermittent 502 proxy error. forefront tmg denied the specified uniform resource locator 502 Proxy Error RSS 2 replies Last post Jul 23, 2007 06:46 AM proxy error chrome by azkotoki ‹ Previous Thread|Next Thread › Print Share Twitter Facebook Email Shortcuts Active Threads Unanswered Threads Unresolved Threads

How To Fix Proxy Error

Advanced Search Reply carrics3 1 Post Intermittent 502 Proxy Error May 01, 2007 12:23 PM|carrics3|LINK Hello, We are hosting our application on a local server with IIS6.0here in our college. Periodically, https://www.iis.net/learn/extensions/configuring-application-request-routing-arr/creating-a-forward-proxy-using-application-request-routing (about 1 in 5 page loads) we get a 502 proxy error. 502 Proxy Error The proxy server received an invalid response from an upstream server. The proxy server could not handle the request GET/Customer/Routes.aspx . Reason: Error reading from remote server Apache/2.2.3 (Unix) PHP/5.1.4 Server at routefinder.computing.dcu.ie Port 80 Most of the time, refreshing the page brings up the https://forums.iis.net/t/next/1123546 page, only for it to occur a few clicks later. Could anyone point us in the correct direction? We have been onto our proxy admin but they point to server problems on our end as the issue. Any help much appreciated.. Reply tomkmvp 9756 Posts MVPModerator Re: Intermittent 502 Proxy Error May 02, 2007 08:38 AM|tomkmvp|LINK This is going to be hard to figure out and google indicates it's a pretty common problem. Is there anyway you can test your app by bypassing the proxy? Tom Kaminski (former IIS MVP 2002-2010) http://mvp.support.microsoft.com/ Reply azkotoki 1 Post Re: Intermittent 502 Proxy Error Jul 23, 2007 06:46 AM|azkotoki|LINK Hi, If you have control over the apache server config, try adding this line on the virtual host which proxies the requests to the IIS server: ProxyBadHeader Ignore Hope this solves the problem... ‹ Previous Thread|Next Thread › This site is managed for Microsoft by Neudesic, LLC. | © 2016 Microsoft. All rights reserved. Privacy Statement Terms of Use Contact Us Advertise With Us Hosted on Microsoft Azure Follow us on: Twitter Facebook Microsoft Feedback on IIS Powered by IIS8

on ASP.NET 5 Architecting ASP.NET MVC applications Optimizing public facing SharePoint sites Presentation: Brewing Eisbock with Raspberry PI and Windows 10 IoT Deep-Dive to Application Insights Deep-Dive to Azure Search Schedule Contact me 6 02 2009 Apache, http://gunnarpeipman.com/2009/02/apache-iis-and-502-proxy-error/ IIS and 502 proxy error Gunnar | IIS | 3 Share this postI have some https://blogs.msdn.microsoft.com/chiranth/2014/08/03/application-request-routing-part-2reverse-proxy-and-troubleshooting-arr-urlrewrite-issues/ servers in my network. There is one public Apache server that proxies requests to these servers. These servers are not directly visible from internet. Some of these servers run IIS and ASP.NET web applications. When accessing these servers through internet then sometimes Apache reports a problem: 502 proxy error. After some digging in internet I found out proxy error what’s going on between Apache and IIS. There is very informative bug report in Apache issue tracker - Bug 37770 - proxy: error reading status line from remote server (null). Comment #17 states reason of error as follows: The problem also only occurs for us when we use an IIS backend device, with an apache its ok. From a tcpdump the only diff I can see between the two sessions is 502 proxy error that the IIS closes the connection when the keep-alive time out is reached with a TCP RST packet, while the apache does a Fin/Ack handshake. When IIS sends this RST packet the next request to the mod_proxy device that’s hits the worker with the RST connection returns the 502 error msg. So, there is some misunderstandings between Apache proxy stuff and IIS. Although some guys suggest to use very long timeouts and hacks to Apache source code there is very simple fix that works very well for me. Make sure you have mod_env enabled and add these lines to Apache configuration file. SetEnv force-proxy-request-1.0 1 SetEnv proxy-nokeepalive 1 After restarting Apache server the communication between Apache and IIS should work fine. After these modifications I have seen no error 502 anymore. Related PostsSession state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive Making WIF local STS to work with your ASP.NET application Using client certificates on Windows Azure IIS SEO Toolkit: Sitemaps overview (illustrated) IIS SEO Toolkit: Site analysis overview (illustrated) SharePoint: temporary solution for GetCustomProperty and SetCustomProperty errors Refactoring: rename method 3 thoughts on “Apache, IIS and 502 proxy error” Apache, IIS and 502 proxy error - Gunnar Peipman's ASP.

RamaswamyAugust 3, 201416 Share 0 0 In the last blog we had discussed how we can leverage ARR as a load balancer. Over here in this blog we will see how we can use ARR as a reverse proxy when the content server is not exposed to the outside world. We will also discuss how we can go on about troubleshooting errors and issues like 502.3 which is the most common error while using ARR. You can use even server farms to configure as reverse proxy by adding a single server to the server farm. Before we go on about how we can configure ARR as reverse proxy Lets check some of the options available in ARR Reverse proxy. Go to inetmgr UI and click on the server name and you will find the option ‘Application Request Routing Cache’. Below is how the UI looks. Below are the options and its intended purpose. 1) Cache Configuration: This option lets you configure proxy cache settings for your ARR server. Cache clean-up interval: By default it is 5 minutes. This setting specifies the time in interval in minutes, at which the cache will check for files or invalidate the cache files and delete it if requires. Disk usage high threshold: This setting specifies the maximum percentage of configured disk space for cache content to be used before the cached files are deleted to make up more space. Disk usage low threshold: This setting specifies percentage of configured disk space that will be reached once files are deleted. Byte range segment size: This is similar to chunking. This setting specifies the maximum size of the chunks that be created by segmenting a single request. Default is 256kb. Compression: This is used to compress responses into a format that the servers are capable of handling such as gzip. 2) Cache control rules: This section lets you configure rules to manage the cache control behavior. You can create rules to be executed when either cache control directive is not present in the headers of the response sent by server or the requests or you can have the rule execute always independent of the cache control header by selecting the item in the drop down Do not cache: you can select this if you don’t want specific contents to be cached based on the rule. Cache: select this option to cache based on the condition. Host name: this specifies for which host name the content should be either cached or not. URL: this is a very good option where you can specify a frequently accessed content which can be cached. For eg: you can choose to cache images i.e., */images/*.jpg all the image contents which is definitely a good rule to improve performance. 3) Add Dri

 

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