Problem with IIS monitoring

Hi Nathan,

curl (executed from BIG-IP) shows right content, but I've just noticed that when monitor check occur, server returns error page:

0x0000: 4500 05dc 0fde 4000 8006 ce10 0a00 0165 E.....@........e

that's the reason, why BIG-IP cannot see right content. The question is why server returns Code 500? The problem is in the HTTP GET Request. I'm trying to modify the request now.

Regards

Paul

[root@ve10:Active] config  b pool foo list
pool foo {
   monitor all myhttp
   members 172.28.19.251:80 {}
}

[root@ve10:Active] config  b monitor myhttp list
monitor myhttp {
   defaults from http
   recv "Status\n\n0\n"
   send "GET /test.html HTTP/1.1\r\nHost: \r\nConnection: Close\r\n\r\n"
}

[root@ve10:Active] config  curl -i http://172.28.19.251/test.html
HTTP/1.1 200 OK
Date: Tue, 04 Dec 2012 13:34:18 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Tue, 04 Dec 2012 12:58:16 GMT
ETag: "4183f8-4e-6b55aa00"
Accept-Ranges: bytes
Content-Length: 78
Connection: close
Content-Type: text/html; charset=UTF-8

Status

0


[root@ve10:Active] config  b pool foo |grep -i pool\ member
+-> POOL MEMBER foo/172.28.19.251:80   active,up

[root@ve10:Active] config  ssldump -Aed -nni 0.0 host 172.28.19.251 and port 80
New TCP connection 1: 172.28.19.80(38567) <-> 172.28.19.251(80)
1354627904.1183 (0.0016)  C>S
---------------------------------------------------------------
GET /test.html HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.19.251
Accept: */*

---------------------------------------------------------------

I think that there could be a problem on IIS (I don't have any information if host header value is set or website has appropriate rights assigned) -> https://devcentral.f5.com/Portals/0/activeforums_Attach/IIS_Monitoring_on_the_F5.pdf

New TCP connection 4: 10.x.x.201(38467) <-> 10.x.x.101(80)
1354629890.4555 (0.0018)  C>S
---------------------------------------------------------------
GET /IsAlive.aspx HTTP/1.1
Host: 
Connection: Close

---------------------------------------------------------------

1354629890.4778 (0.0222)  S>C
---------------------------------------------------------------
HTTP/1.1 500 Internal Server Error
Connection: close
Date: Tue, 04 Dec 2012 14:04:52 GMT 

  

            Server Error in '/' Application.

             Object reference not set to an instance of an object. 

 
  
 
[NullReferenceException]: Object reference not set to an instance of an object.
   at xxx.Global.Application_BeginRequest(Object sender, EventArgs e)
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)  
  
 so I think, that the problem could be in IIS configuration. 
 My http GET is the following: 
 GET /IsAlive.aspx HTTP/1.1\r\nHost: \r\nConnection: Close\r\n\r\n  

[root@dc_f5_1:Active] config  curl -i http://10.X.X.101/IsAlive.aspx
HTTP/1.1 200 OK
Date: Tue, 04 Dec 2012 14:32:27 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
X-AspNet-Version: 2.0.50727
Set-Cookie: ASP.NET_SessionId=mmcjyk55eyvdlsqivwcpbxej; path=/; HttpOnly
Cache-Control: private
Content-Type: text/html; charset=utf-8
Content-Length: 1951








    


    


        Status
        
            0
        
 

New TCP connection 7: 10.X.X.201(42244) <-> 10.X.X.101(80)
1354631633.4696 (0.0011)  C>S
---------------------------------------------------------------
GET /IsAlive.aspx HTTP/1.1
Host: 
Connection: Close

---------------------------------------------------------------

1354631633.4712 (0.0016)  S>C
---------------------------------------------------------------
HTTP/1.1 500 Internal Server Error
Connection: close
Date: Tue, 04 Dec 2012 14:33:55 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
X-AspNet-Version: 2.0.50727
Cache-Control: private
Content-Type: text/html; charset=utf-8
Content-Length: 3565


    
        Object reference not set to an instance of an object.
        
    

 

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