HTTP error 503. The service is unavailable

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I installed my site on an IIS8, I got "

Quote:
No connection could be made because the target machine actively refused it 127.0.0.1:1521

the server is old, it had a lot of rules installed on it, also there was a MS Exchange installed on IIS, I tried to remove the server Rules, removed and re-installed IIS. Now I'm getting "

Quote:
HTTP Error 503. The service is unavailable on IIS

I have tried everything on the internet, but not solving the issue. any solution for this. BTW, I don't care about the Exchange server or the server Rules, if I can reset IIS and/or all server Rules as the appear when first installing windows server, this will be OK

edit
my mistake, the error is "...refused it 127.0.0.1:1521" not "...refused it 127.0.0.1:25". sorry

What I have tried:

I have tried many solutions on the internet. such as adding some code on applicationHost.config, and else.

After checking the logs, I'm seeing

Warning :
Service MSExchangeSubmission.  An exception has been thrown: Microsoft.Exchange.Assistants.TransientMailboxException
   at Microsoft.Exchange.Assistants.Util.TraceAndThrow(Action function, AIException aiException, String nonLocalizedAssistantName)
   at Microsoft.Exchange.Assistants.Util.CatchMeIfYouCan(Boolean translateToPermanentException, Action function, String nonLocalizedAssistantName, ISet`1 permanentExceptions)
   at Microsoft.Exchange.Assistants.Base.CatchMeIfYouCan(Boolean translateToPermanentException, Action function, String nonLocalizedAssistantName, ISet`1 permanentExceptions)

and also an error

The Module DLL C:\Windows\System32\RpcProxy\RpcProxy.dll failed to load.

Posted 9-Mar-20 6:47am

ADEL AL-TAEY

Updated 9-Mar-20 22:06pm

v2

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phil.o 9-Mar-20 13:13pm

It seems Exchange has not been uninstalled properly. What can you see in IIS management console? Are there some leftovers from Exchange? And in services' console?

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Richard Deeming · Accepted Answer · 2020-03-09T10:19:00

Solution 1

Uninstall IIS and the Windows Process Activation Service.

Then delete or rename the folders C:\inetpub and C:\Windows\System32\inetsrv (if they still exist).

You can then reinstall IIS, and the configuration should be reset to the default.

How to perform a clean reinstallation of IIS | Microsoft Docs[^]

Posted 9-Mar-20 10:19am

Richard Deeming

Comments

Maciej Los 10-Mar-20 2:57am

5ed!

ADEL AL-TAEY 10-Mar-20 3:39am

"HTTP error 503" is gone now. Now, I am back to the original error
"No connection could be made because the target machine actively refused it 127.0.0.1:25"
Hope you still help me with it. Grateful for your help

Richard Deeming 10-Mar-20 6:09am

You're trying to connect on port 25 (SMTP) instead of port 80 (HTTP) or 443 (HTTPS).

What are you trying to do when the error occurs?

ADEL AL-TAEY 10-Mar-20 6:40am

sorry, the error "...refused it 127.0.0.1:1521" not "25".
and I'm browsing for "localhost:8050"

Richard Deeming 10-Mar-20 6:42am

Neither of those look like standard ports for IIS. Have you changed the bindings on the site? Or are you trying to use IIS Express instead?

ADEL AL-TAEY 10-Mar-20 8:54am

I bound my site with port number "8050". and I browse for localhost:8050
I don't know why I'm getting an error with port 1521, which the oracle port.

Richard Deeming 10-Mar-20 8:55am

Is your code trying to connect to an Oracle database? It sounds like Oracle isn't running, or isn't accepting connections on that port.