Iis7 wcf: on the local computer, I get 401 - unauthorized: access is denied due to invalid credentials

Question

Iis7 wcf: on the local computer, I get 401 - unauthorized: access is denied due to invalid credentials

I am new to web services and I have the following problem. I have a WCF service running in Windows authentication mode in IIS 7.5 and Windows 2008 R2. It works well when I call it directly from the IIS machine. But when I try to call the service from the local computer, I get the following error: 401 - Unauthorized: access is denied due to invalid credentials.

The service was running on local computers for several days, and suddenly it stopped (I'm not sure, but it is possible that some configuration has been changed).

I call the service directly from IExplorer: http://serveriis/ssopension/service.svc

web.config:

 <?xml version="1.0" encoding="UTF-8"?>
<configuration>

  <connectionStrings configProtectionProvider="RsaProtectedConfigurationProvider">
    <EncryptedData Type="http://www.w3.org/2001/04/xmlenc#Element" xmlns="http://www.w3.org/2001/04/xmlenc#">
      <EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#tripledes-cbc" />
      <KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
        <EncryptedKey xmlns="http://www.w3.org/2001/04/xmlenc#">
          <EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#rsa-1_5" />
          <KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
            <KeyName>Rsa Key</KeyName>
          </KeyInfo>
          <CipherData>
            <CipherValue>O8jBoF9YUW3sZtSN+L/Xxhzss=</CipherValue>
          </CipherData>
        </EncryptedKey>
      </KeyInfo>
      <CipherData>
        <CipherValue>C+EeTszivHho8Ujk2oIQ==</CipherValue>
      </CipherData>
    </EncryptedData>
  </connectionStrings>


<system.web>
    <compilation targetFramework="4.0" />

    <authentication mode="Windows" />

    <pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID" />
  </system.web>

  <system.serviceModel>

    <bindings>
      <basicHttpBinding>
        <binding name="BasicHttpEndpointBinding">
          <security mode="TransportCredentialOnly">
            <transport clientCredentialType="Windows" />
          </security>
        </binding>
      </basicHttpBinding>
    </bindings>

    <services>
      <service behaviorConfiguration="SSO_Pension.ServiceBehavior" name="SSO_Pension.Service">
        <endpoint address="" binding="basicHttpBinding" bindingConfiguration="BasicHttpEndpointBinding" name="BasicHttpEndpoint" contract="SSO_Pension.IService">
          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint>

      </service>
    </services>

    <behaviors>
      <serviceBehaviors>
        <behavior name="SSO_Pension.ServiceBehavior">
          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
          <serviceMetadata httpGetEnabled="true" />
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="false" />
        </behavior>
      </serviceBehaviors>
    </behaviors>

    </system.serviceModel>


    <system.webServer>
        <defaultDocument>
            <files>
                <add value="Service.svc" />
            </files>
        </defaultDocument>
    </system.webServer>

</configuration>