Example scenario using Microsoft Network Monitor:

1. SIM uses the "Expect:  100-continue" command. Frame 486.

2. After that the Proxy server causes an exception:

  Frame: Number = 487, Captured Frame Length = 415, MediaType = ETHERNET

+ Ethernet: Etype = Internet IP (IPv4),DestinationAddress:[00-00-00-00-00-00],SourceAddress:[00-00-00-00-00-00]

+ Ipv4: Src = 192.0.2.10, Dest = 192.0.2.20, Next Protocol = TCP, Packet ID = 39972, Total IP Length = 401

- Tcp: Flags=...AP..., SrcPort=HTTP Alternate(8080), DstPort=2205, PayloadLen=361, Seq=2532664687 - 2532665048, Ack=2359623393, Win=65535 (scale factor 0x0) = 65535

    SrcPort: HTTP Alternate(8080)

    DstPort: 2205

    SequenceNumber: 2532664687 (0x96F5656F)

    AcknowledgementNumber: 2359623393 (0x8CA4FEE1)

  - DataOffset: 80 (0x50)

     DataOffset: (0101....) 20 bytes

     Reserved:   (....000.)

     NS:         (.......0) Nonce Sum not significant

  - Flags: ...AP...

     CWR:    (0.......) CWR not significant

     ECE:    (.0......) ECN-Echo not significant

     Urgent: (..0.....) Not Urgent Data

     Ack:    (...1....) Acknowledgement field significant

     Push:   (....1...) Push Function

     Reset:  (.....0..) No Reset

     Syn:    (......0.) Not Synchronize sequence numbers

     Fin:    (.......0) Not End of data

    Window: 65535 (scale factor 0x0) = 65535

    Checksum: 0x192, Good

    UrgentPointer: 0 (0x0)

- Http: Response, HTTP/1.0, Status Code = 417, URL: http://<FQDN>/eval_license_broker/get_licenses.asmx

    ProtocolVersion: HTTP/1.0

    StatusCode: 417, Expectation Failed

    Reason: Expectation failed

    Server:  squid/2.7.STABLE6

    Date:  Fri, 17 Jul 2009 07:22:38 GMT

  - ContentType:  text/html

     MediaType:  text/html

    ContentLength:  1542

    X-Squid-Error:  ERR_INVALID_REQ 0

    X-Cache:  MISS from <FQDN>

    X-Cache-Lookup:  NONE from <proxy>.<domain>.com:8080

    Via:  1.0 <proxy>.<domain>.com:8080 (squid/2.7.STABLE6)

    Connection:  close

    HeaderEnd: CRLF

3. Squid Proxy needs to be configured to accept Expect100 commands.

See the below Squid Proxy documentation on Expect100Continue commands:

http://www.squid-cache.org/Doc/config/ignore_expect_100/

Priority: 1
Tick Count: 912125
Host Name: *********
Process: SYMANT~1 (3664)
Thread ID: 15
Module: SYMANT~1.EXE
Source: Symantec.Installation.EvaluationBrokerProxy.IsAlive
Description: Could not contact Licensing Server at Url 'http://<FQDN>/eval_license_broker/get_licenses.asmx'

( Exception Details: System.Net.WebException: The request failed with HTTP status 417: Expectation failed.
   at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
   at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
   at Symantec.Installation.EvaluationBroker.Service.get_licenses_by_sku2(String s_key, String s_sku, Int32 i_license_term, String s_customer_email, String s_company_name, String s_customer_first_name, String s_customer_last_name, String s_customer_country_code, String s_customer_state_province, String s_customer_city, String s_customer_postal_code, String s_customer_address_1, String s_customer_address_2, String s_customer_phone, String[] s_urls)
   at Symantec.Installation.EvaluationBrokerProxy.IsAlive() )
( Exception logged from:
   at Altiris.Diagnostics.Logging.EventLog.ReportException(Int32 severity, String strMessage, String category, Exception exception)
   at Altiris.Diagnostics.Logging.EventLog.ReportException(String strMessage, Exception exception)
   at Symantec.Installation.EvaluationBrokerProxy.IsAlive()
   at Symantec.Installation.Context.WizardProcess.TradeComplianceManager.ContactTradeComplianceServer()
   at Symantec.Installation.Context.ProductListingManager.SetProperSimMode()
   at Symantec.Installation.Context.ProductListingManager.LoadProductListing()
   at Symantec.Installation.Context.ProductListingManager.PlLoadAndUpdate()
   at Symantec.Installation.Context.ProductListingManager.<BeginPlLoadAndUpdate>b__0()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()
 )
( Extra Details:  Type=System.Net.WebException Src=System.Web.Services )

ITMS 7.x

Squid Proxy seems to be configured to ignore expect100 commands.

Option 1: See the below Squid Proxy documentation on Expect100Continue commands:

http://www.squid-cache.org/Doc/config/ignore_expect_100/

Option 2: Create a proxy exception for the Altiris Licensing server.