Local Webservice Loosing Connection

Good morning all!  I've got a weird situation on a local webserver that we run in the office.  We have an intranet web site that we use for office admin etc.  Also as part of the same project we have a webservice that is interacted with by a scheduling/time clock application (Windows Forms Application).  We've used this same solution for a few years between 2 offices (connected with a VPN) with no issues.  We have now had to separate the applications into 2 separate instances (1/office).  I got IIS running in the other office and the website is running aok.  The issue is that the time clock application is has lost its connection to the webservice first thing in the morning.  It is scheduled to close after hours each evening so it needs to be run in the morning.  In the morning once it has been run it doesn't have a connection to the service for about 20 minutes (estimate from what I've been told) and then connects properly and runs fine for the rest of the day.  The time clock program polls the service every few seconds.  The odd thing to me is that when the time clock can't access the webservice the web site is accessible on the same PC.  This seems to take a routing issue off the table though maybe I'm missing something...? We have a local DNS server that has an "A" and "PRT" record to the web server IP.  The web site is running on the DNS server.  We also run a scheduled task that purges the DNS records every 5 minutes.  We started doing this years ago as one external website that we frequently use would become inaccessible from time to time and this solved it.  With the assumption that the DNS purging isn’t the fix (as it runs every 5 minutes and the time clock wasn’t working for around 20) what else could it be?  One thing that I noticed that was different on the new server is that IPV6 was enabled and wasn’t on the old server.  The old server is running Server 2008 and the new server is running Server 2012.  Not sure how either of these could be related but were worth mentioning 😊  Any help would be appreciated.

Thanks,
Greg


This is the cache clearing script that we're using

:: @echo off

Dnscmd CRS-DC-1501.CallingwoodRegHQ.com /clearcache

Select allOpen in new window

This is the Time Clock config file

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
  </startup>
  <appSettings>
    <add key="CurSite" value="Live" />
    <add key="ClientSettingsProvider.ServiceUri" value="" />
  </appSettings>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="v12.0" />
      </parameters>
    </defaultConnectionFactory>
  </entityFramework>
  <system.serviceModel>
    <bindings>
      <basicHttpBinding>
        <binding name="BasicHttpBinding_IoHService" maxBufferPoolSize="52428800" maxReceivedMessageSize="2147483647">
          <readerQuotas maxStringContentLength="2147483647" maxArrayLength="1638400" />
        </binding>
      </basicHttpBinding>
    </bindings>
    <client>
      <endpoint address="http://oh.callingwoodreghq.com/Services/oHService.svc"
        binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_IoHService"
        contract="oHService.IoHService" name="BasicHttpBinding_IoHService" />
    </client>
  </system.serviceModel>
  <system.web>
    <membership defaultProvider="ClientAuthenticationMembershipProvider">
      <providers>
        <add name="ClientAuthenticationMembershipProvider" type="System.Web.ClientServices.Providers.ClientFormsAuthenticationMembershipProvider, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" serviceUri="" />
      </providers>
    </membership>
    <roleManager defaultProvider="ClientRoleProvider" enabled="true">
      <providers>
        <add name="ClientRoleProvider" type="System.Web.ClientServices.Providers.ClientRoleProvider, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" serviceUri="" cacheTimeout="86400" />
      </providers>
    </roleManager>
  </system.web>
</configuration>

Select allOpen in new window