IIS Reverse Proxy Module 500 error when going to PHP backend
Problem:
When setting up IIS reverse Proxy to connect back to a linux PHP application the site would not load and IIS would throw a 500 error. When browsing to the PHP site from the IIS server manually no errors and connectivity was working fine.
Solution:
I missed an option in the web.config file for the PHP pattern “pattern=”^text/php”” :
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.webServer>
<rewrite>
<outboundRules>
<rule name="ReverseProxyOutboundRule1" preCondition="ResponseIsHtml1">
<match filterByTags="A, Area, Base, Form, Frame, Head, IFrame, Img, Input, Link, Script" pattern="^http(s)?://10.0.xxx.81/(.*)" />
<action type="Rewrite" value="http{R:1}://www.xxxx.com/{R:2}" />
</rule>
<preConditions>
<preCondition name="ResponseIsHtml1">
<add input="{RESPONSE_CONTENT_TYPE}" pattern="^text/html" />
<add input="{RESPONSE_CONTENT_TYPE}" pattern="^text/php" />
</preCondition>
</preConditions>
</outboundRules>
<rules>
<clear />
<rule name="index" stopProcessing="true">
<match url="(.*)" />
<conditions logicalGrouping="MatchAll" trackAllCaptures="false">
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" />
</conditions>
<action type="Redirect" url="http://www.xxxx.com/xx/slovenia/index.php" />
</rule>
<rule name="ReverseProxyInboundRule1" patternSyntax="ECMAScript" stopProcessing="true">
<match url="(.*)" />
<conditions logicalGrouping="MatchAny" trackAllCaptures="false">
</conditions>
<action type="Rewrite" url="http://10.0.xxx.81/bd/slovenia/{R:0}" />
</rule>
</rules>
</rewrite>
</system.webServer>
</configuration>
