iis reverse proxy showing error 404 for services - asp.net

Question

I have Asp.net MVC 4 Application with WCF services. Project is hosted in iis Production Server P125 (10.10.10.125), there are few other sites hosted in same server. Our Web / Front End Server is working as Reverse proxy for production server (Url Rewrite and Application Request Routing installed) As,
185.132.x.x is public ip of Web Server acting as reverse proxy only (Windows Server 2016).
Our application is hosted at port 8899 of Application server ip 10.10.10.125
185.132.x.x:8080 <= reverse proxy => 10.10.10.125:8899
Website is working fine, all the pages/actions are working fine of MVC application, except the services (rest.svc , winact.svc)
whenever we hit 185.132.x.x:8080/rest.svc its showing error :
The resource cannot be found.
Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly.
Requested URL: /rest.svc
I dont know why ?
all our services are showing same error, while the services are working fine with 10.10.10.125:8899/rest.svc on local network as well as from the WebServer itself.
On remote login to WebServer(185.132.x.x) and browsing/accessing the application and services (.svc) via 10.10.10.125:8899, its working fine.
I am using the Reverse Proxy as :
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.webServer>
<rewrite>
<rules>
<rule name="ReverseProxyInboundRule1" stopProcessing="true">
<match url="(.*)" />
<action type="Rewrite" url="http://10.10.10.125:8899/{R:1}" />
</rule>
</rules>
</rewrite>
</system.webServer>
</configuration>

Answer 1

After spending 48 hours i have figured out that, configuring serviceHostingEnvironment resolved the issue of services (.svc) and my Web.config on WebServer(185.132.x.x) is like :
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.web>
<customErrors mode="Off"/>
<compilation debug="false" targetFramework="4.5"/>
<httpRuntime targetFramework="4.5" />
<pages>
<namespaces>
<add namespace="System.Web.Helpers"/>
<add namespace="System.Web.Mvc"/>
<add namespace="System.Web.Mvc.Ajax"/>
<add namespace="System.Web.Mvc.Html"/>
<add namespace="System.Web.Optimization"/>
<add namespace="System.Web.Routing"/>
<add namespace="System.Web.WebPages"/>
</namespaces>
</pages>
</system.web>
<system.serviceModel>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true"/>
</system.serviceModel>
<system.webServer>
<rewrite>
<rules>
<rule name="ReverseProxyInboundRule1" stopProcessing="true">
<match url="(.*)" />
<action type="Rewrite" url="http://10.10.10.125/{R:1}" />
</rule>
</rules>
</rewrite>
</system.webServer>
</configuration>