Dear support:

We have 2 problems meet:
1. Fail to remotely connect VC server (5.7.5) from VC client (5.7.5) using VC account.
No error appear on VC client UI. Only wait long time but VC UI no response.
I can telnet server port 16444

2. Many error was logged in VC server: "Cannot write to sslstream"

Our VC server was setup for 2 months but haven't try remotely login before. Local connect to VC server is ok.

Server configure: windows 2008R2 sp1 with domain joined (run sysprep and join domain)

Below attach some client and server log.

Client log:
8/3/2011 11:36:48 AM Connecting (True)

Server log:
011-08-03 11:35:11 Err Cannot write to sslstream.
2011-08-03 11:35:11 Err Cannot write to sslstream.
2011-08-03 11:35:11 Err Cannot write to sslstream.
2011-08-03 11:35:11 Err Cannot write to sslstream.
2011-08-03 11:35:11 Err Cannot write to sslstream.
2011-08-03 11:35:11 Err Cannot write to sslstream.
2011-08-03 11:35:12 Err Cannot write to sslstream.
2011-08-03 11:35:12 Err Cannot write to sslstream.
2011-08-03 11:35:12 Err Cannot write to sslstream.
2011-08-03 11:35:12 Err Cannot write to sslstream.
2011-08-03 11:35:12 Err Cannot write to sslstream.
2011-08-03 11:35:12 Err Cannot write to sslstream.

Seems like some kind of strange state (maybe due to some Windows update) has occured. Have you tried just restarting the VisualCron service (the remote)?

---

Dear Support,

Of cos, I've been restart the services. But still NO VC client can connect to VC server.

p.s. "the only allow local connection " setting was not Checked.

Are you able to restart the machine itself? Because this just seems like a temporary state.

---

Dear support,

After the server reboot, the issue still occur.

1. Visualcron client CANNOT connect to our VC server.
3. and below error is still occur many times in server log.

2011-08-05 14:46:01 Err Cannot write to sslstream.
2011-08-05 14:46:01 Err Cannot write to sslstream.
2011-08-05 14:46:01 Err Cannot write to sslstream.
2011-08-05 14:46:01 Err Cannot write to sslstream.
2011-08-05 14:46:01 Err Cannot write to sslstream.
2011-08-05 14:46:01 Err Cannot write to sslstream.
2011-08-05 14:46:01 Err Cannot write to sslstream.
2011-08-05 14:46:01 Err Cannot write to sslstream.

Please stop the VisualCron service, delete the log file. Start the VisualCron service. Try to connect with the client for 2 minutes, then send us the log file so we can see if there is anything else interesting. Also, please upgrade to 5.7.8. if possible.

---

Dear VC support,

Pls help....still can't use VC client!!

After server reboot, server will no longer have the error message.
But once I use VC client try to connect the VC server (still fail to connect). Server will log the following error message and many "Err Cannot write to sslstream" message repeatedly appear.
Pls help....Can't use VC client!!

2011-08-04 22:35:57 Debug TcpClient accepted.
2011-08-04 22:35:57 Debug Before sending ClientConnection.
2011-08-04 22:35:57 Debug New client connected.
2011-08-04 22:35:57 Debug Before returning sslStream
2011-08-04 22:35:57 Debug AuthenticateAsServer, certificate name: CN=vc
2011-08-04 22:35:57 Err Error AuthenticateAsServer, ex: The credentials supplied to the package were not recognized
2011-08-04 22:35:57 Err Cannot write to sslstream.

p.s. this server had been changed domain and computer name.

Try the following:

1. On the server - stop the VisualCron service
2. On the server - start the VisualCronService.exe manually from the installation folder by double clicking
3. On the client - try to connect now

If this work it is a certificate problem and you need to reboot the server once.

---

Dear support,


I've stop the service and manually start the exe.
But VC client was still fail to connect to server.

Pls help!!

2011-08-11 18:03:06 Debug Starting main threads
2011-08-11 18:03:07 Debug InternalWorkerThreadClass was started
2011-08-11 18:03:07 Debug Flushing memory
2011-08-11 18:03:07 Debug Startup finished
2011-08-11 18:03:07 Err Starting IPC server.
2011-08-11 18:03:07 Debug Server certificate read
2011-08-11 18:03:07 Debug VisualCron - Server starting on port: 16444
2011-08-11 18:03:07 Info Starting IPV6 listener
2011-08-11 18:03:59 Debug TcpClient accepted.
2011-08-11 18:03:59 Debug Before sending ClientConnection.
2011-08-11 18:03:59 Debug New client connected.
2011-08-11 18:03:59 Debug Before returning sslStream
2011-08-11 18:03:59 Debug AuthenticateAsServer, certificate name: CN=vc
2011-08-11 18:03:59 Err Error AuthenticateAsServer, ex: The credentials supplied to the package were not recognized
2011-08-11 18:03:59 Err Cannot write to sslstream.

We have created a small tool for you. Please try the following:

1. stop the VisualCron service
2. download http://neteject.com/down...sualCron/CertCleaner.zip 
3. decompress the file on the drive
4. open a cmd window and move to that location and run CertCleander.exe
5. check so that output does not contain any errors
6. start the VisualCron service
7. now try connecting again

---

Dear support,

The tool work in my cloned UAT enviroment.
Can you explain more before I can deploy the fix to my production?
What the tool did? What 2 cert were deleted and created?

The two certs that are being deleted with this app is created by VisualCron in the first place (at startup if they does not exist).

The certificates is used for securing the SSL server.

We have reason to believe, that in your case, the SYSTEM account did not have sufficient privileges to create the certificates fully. That is why we want you do run the service in interactive mode (from desktop).

---

Dear support,

thanks for your explaination.

Here is another resolution:

http://support.microsoft.com/kb/908572 

---