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Exchange 2003 RPC over HTTP Disconnection- ValidPorts entries disappear

Posted on 2004-08-11
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Last Modified: 2012-05-05
Hello,

I have setup Exchange 2003 for RPC over HTTPS. It connects fine and stays connected for a while, then it will disconnect and not reconnect. When I look on the proxy server, the "ValidPorts" in the register is cleared. I re-enter the setting in the register, then Outlook can connect. Then the disconnection starts all over again.

This happens periodically. I don't see anything in the logs at all.

Anyone have an idea?

Thanks in advanced,
Tareef
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Question by:TareefA
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Expert Comment

by:Sembee
ID: 11774964
More info please?

Single Server or frontend / backend.

Service Pack for Exchange installed?

Is the certificate a homegrown or purchased?

What have you put in the valid ports section?

Simon.
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Author Comment

by:TareefA
ID: 11778595
Simon,

- It is in a Front-end/Back-end topology
- SP1 on both the Front and Back-end server
- The certificate is self-created, but the Cert Server is on the Public net

This is what we have in the ValidPorts section:

server-fe:100-5000;
server-be:6001-6002;
server-be.domain.com:6001-6002;
server-dc:6001-6002;
server-dc.domain.com:6001-6002;
server-be:6004;
server-be.domain.com:6004;
server-dc:6004;
server-dc.domain.com:6004;
mail.external.com:6001-6002;
mail.external.com:6004;
server-dc:593;
server-dc.domain.com:593;
server-be:593;
server-be.domain.com:593;
mail.external.com:593;

Thanks,
Tareef
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LVL 104

Expert Comment

by:Sembee
ID: 11783355
Those settings do seem very familar... :-)

Has the certificate been added to the client machine? So many of the problems with this technology are down to the certificate and getting a purchased certificate fixes them.

This may not be the cause here. I should have this before - what is between the Exchange frontend server and the Internet? A firewall of some kind?
This sounds like the port is being closed and not reopened.

What happens if you run Outlook like this after it has been disconnected:

outlook /rpcdiag

This will show you where the problem is.

Simon.
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Author Comment

by:TareefA
ID: 11785858
Simon,

Yes, I added the cert to the client. I don't think it is the cert because as soon as I add the ValidPorts entries again, the client can connect fine.  For some reason the ValidPorts key keeps getting cleared.

When I run outlook /rpcdiag, it just says disconnected when the entries are missing.

 Any idea why the ValidPorts reg key keeps getting cleared?

Thanks,
Tareef
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LVL 104

Accepted Solution

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Sembee earned 250 total points
ID: 11787498
I haven't seen the registry settings being cleared myself, but there have been some reports of this. I am trying to provoke a test system in to doing it so that I can track down the problem but it is proving ellusive.

Have you attempted to configure RPC/HTTP using EMS as well as the manual (registry) method? I suspect that this is the cause. It could be one of those "do it one way or the other but not both" issues.

Simon.
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Author Comment

by:TareefA
ID: 11787763
Do you mean setting the RPC over HTTP front-end option on my Front-end Exchange server? Yes, I set it as a 'RPC over HTTP' front-end. But I see what you are saying. I will remove it in EMS and monitor it.

Tareef
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Author Comment

by:TareefA
ID: 11796357
Simon,

I think removing the RPC setting out of ESM and just using the registry did it. I haven't had a disconnect since yesterday.

Thanks for your assistance.

Tareef
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