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SBS2008 RPC Error

Posted on 2009-04-27
17
Medium Priority
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Last Modified: 2012-05-06
Hi,

We have a sbs2008 with 70 users. This server are hosting at a datacenter and users access exchange using rpc. At this morning, RPC stops work, but over services - IMAP, POP3, SMTP, OWA, works fine.  I make some tests using www.testexchangeconnectivity.com and results are some errors at 6001/6004.


I make some changes by sugest at internet:

Before this errors i have made a change at web.config find at internet with this sugestion, and restart IIS.

At web.config in C:\Program Files\Windows Small Business Server\Bin\webapp\SBS Web Applications

i change this entries:

<system.webServer>
    <modules>
      <add name="HttptoHttpsRedir" type="Microsoft.WindowsServerSolutions.IWorker.IIS.Modules.HttpToHttpsRedir,HttpToHttpsRedir,Version=6.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    </modules>
  </system.webServer>
</configuration>


 to this


  <system.webServer>
    <modules>
      <remove name="HttptoHttpsRedir"/>
    </modules>
  </system.webServer>
</configuration>


After this changes, i have an errors at event viewer about DistributedCOM Event ID 10016 and testexchangeconnectivity change errors to:

Attempting to Resolve the host name email.latinamericahotels.com.br in DNS.
 Host successfully Resolved
Additional Details
 IP(s) returned: xxx.xxx.xxx.xxx

Testing TCP Port 443 on host email.latinamericahotels.com.br to ensure it is listening/open.
 The port was opened successfully.

Testing SSLCertificate for validity.
 The certificate passed all validation requirements.
Additional Details
 Subject: CN=email.latinamericahotels.com.br, OU=Domain Control Validated, O=email.xxxxx.com.br, Issuer SERIALNUMBER=07969287, CN=Go Daddy Secure Certification Authority, OU=http://certificates.godaddy.com/repository, O="GoDaddy.com, Inc.", L=Scottsdale, S=Arizona, C=US

Testing SSL mutual authentication with RPC Proxy server
 Successfully verified Mutual Authentication
Additional Details
 Certificate common name email.xxxx.com.br matches msstd:email.xxxx.com.br

Testing Http Authentication Methods for URL https://email.xxx.com.br/rpc/rpcproxy.dll
 Http Authentication Methods are correct
Additional Details
 Found all expected authentication methods and no disallowed methods Methods Found: Negotiate NTLM Basic realm="email.xxx.com.br"

Attempting to Ping RPC Proxy email.xxx.com.br
 Cannot ping RPC Proxy
Additional Details
 A Web Exception occured because an HTTP 401 - Unauthorized response was received from Unknow.

At event viewer error 10016 are:

- System

  - Provider

   [ Name]  Microsoft-Windows-DistributedCOM
   [ Guid]  {1B562E86-B7AA-4131-BADC-B6F3A001407E}
   [ EventSourceName]  DCOM
 
  - EventID 10016

   [ Qualifiers]  49152
 
   Version 0
 
   Level 2
 
   Task 0
 
   Opcode 0
 
   Keywords 0x80000000000000
 
  - TimeCreated

   [ SystemTime]  2009-04-27T20:46:19.000Z
 
   EventRecordID 28219
 
   Correlation
 
  - Execution

   [ ProcessID]  0
   [ ThreadID]  0
 
   Channel System
 
   Computer GOLDENSRV02.xxx.local
 
  - Security

   [ UserID]  S-1-5-20
 

- EventData

  param1 Específico do aplicativo
  param2 Local
  param3 Ativação
  param4 {61738644-F196-11D0-9953-00C04FD919C1}
  param5 NT Authorit
  param6 Network service
  param7 S-1-5-20
  param8 LocalHost (Using LRPC)

RPC is not working, but i don´t have any ideia to resolve this question.

Thnaks a lot.

Guirau
0
Comment
Question by:jcguirau
  • 10
  • 7
17 Comments
 
LVL 15

Expert Comment

by:vico1
ID: 24249921
Why don't you run the Internet connection wizard?
0
 

Author Comment

by:jcguirau
ID: 24250627
HI,

When i try to run Wizard, i have a message warning alert to any modify can affect SSL certificate. This changes can be stops other services? Ex: IMAP, POP and SMTP are work fine, with Cert.

Thanks

Guirau
0
 
LVL 15

Expert Comment

by:vico1
ID: 24250764
Then you could choose the option of keeping the existing SSL Certificate if this certificate is from a CA.
0
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Author Comment

by:jcguirau
ID: 24251327
Vico,

I will try it and will post the results.

Thanks.

Guirau
0
 

Author Comment

by:jcguirau
ID: 24266838
Vico,

Before run a wizard, i make a backup and shutdown server. After restart server RPC return without problems. During operation today, i have same problem again, rpc unavailable, but with different error. now error are referent a port 6001/6004 with IPV6. Running testexchangeconnectivity again, the solution are to run rollup 4, but i have install a rollup 7. I will try to install rollup 7 again.

Thanks,

Guirau
0
 

Author Comment

by:jcguirau
ID: 24274542
HI,

My problem return at same point... or at testing connectivity i have an error       A Web Exception occured because an HTTP 401 - Unauthorized response was received from Unknown.

After a shutdown and power on server again, this problems disapears, but RPC/HTTP after some hours return same problems, stop ping rpc, etc...

Someone help me please....

Thanks a lot.

Guirau
0
 
LVL 15

Expert Comment

by:vico1
ID: 24278519
What error are you having in the event log regarding this problem?
Take a look at the event viewer something else is causing it to stop working.
Vico1
0
 

Author Comment

by:jcguirau
ID: 24280893
Vico,

No error messages at event viewer, it´s the problem. Today i do nothing, don´t shutdown server or anything and services are work fine. When users try to use rpc/http 2 or more users the problem start again.

I can´t find errors at connections to the server, because owa works fine.

Any ideia?

Thanks a lot.

Guirau
0
 
LVL 15

Expert Comment

by:vico1
ID: 24282075
When you say rpc/http,
Do you mean RPC over HTTP?
If so how many user cals do you have on the SBS server and how many users do you have total?
0
 

Author Comment

by:jcguirau
ID: 24283174
Vico,

Yes, RPC/Over HTTP. We have 30 Cals and 70 users at total. I don´t think this is an error. This SBS are using only to email server and acess to this exchange are make by owa and outlook anywhere.

thanks

Guirau
0
 
LVL 15

Expert Comment

by:vico1
ID: 24283233
That is your problem. once you have 30 simultaneous connection, the 31rst one get denied.
If your are using web access that's not a problem but to use RPC over HTTP you need enough cals.

Vico1
0
 

Author Comment

by:jcguirau
ID: 24283820
Vico,

At monday, i will identify all users using RPC and verify this questions.

Thanks..

Guirau
0
 
LVL 15

Expert Comment

by:vico1
ID: 24283832
Good Luck!
0
 

Author Comment

by:jcguirau
ID: 24295366
Vico,

We have only 5 users connect using rpc/http. At this time we have this error:

 Attempting to Resolve the host name email.latinamericahotels.com.br in DNS.
 Host successfully Resolved
Additional Details
 IP(s) returned: 201.76.44.165

Testing TCP Port 443 on host email.latinamericahotels.com.br to ensure it is listening/open.
 The port was opened successfully.

Testing SSLCertificate for validity.
 The certificate passed all validation requirements.
Additional Details
 Subject: CN=email.latinamericahotels.com.br, OU=Domain Control Validated, O=email.latinamericahotels.com.br, Issuer SERIALNUMBER=07969287, CN=Go Daddy Secure Certification Authority, OU=http://certificates.godaddy.com/repository, O="GoDaddy.com, Inc.", L=Scottsdale, S=Arizona, C=US

Testing SSL mutual authentication with RPC Proxy server
 Successfully verified Mutual Authentication
Additional Details
 Certificate common name email.latinamericahotels.com.br matches msstd:email.latinamericahotels.com.br

Testing Http Authentication Methods for URL https://email.latinamericahotels.com.br/rpc/rpcproxy.dll
 Http Authentication Test failed
Additional Details
 Exception Details: Message: The operation has timed out Type: System.Net.WebException Stack Trace: at System.Net.HttpWebRequest.GetResponse() at Microsoft.Exchange.Tools.ExRca.Tests.HttpAuthMethodsTest.PerformTestReally()

If i shutdown the server, every thing run without problems again during an hour.

I´be gonna be crazy...

Thanks...

Guirau
0
 
LVL 15

Expert Comment

by:vico1
ID: 24297097
How many user are locally connected to the server via workstations?
Is it always the same users?
0
 

Author Comment

by:jcguirau
ID: 24297783
Vico,

We don´t have users locally, this server are instaled at datacenter and all connections are make by RPC/HTTP or owa.

This users are working in different places.

Thanks.

Guirau
0
 

Accepted Solution

by:
jcguirau earned 0 total points
ID: 24641662
Vico

A friend found a solution to this case.  He detect a problem. Is a number of connection at IIS pool aplication.

We open a new pool application to OWA at IIS. This resolve the isue.

Thanks.

Guirau
0

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