The RPC server is unavailable 0x800706BA

[jasonbrink]

I created an early thread and thought I figured it out but didn't. It was moved to solved issues.

I still have 16 computers with the The RPC server is unavailable 0x800706BA message on it.

I did the following:

1 - Made sure firewall was turned off
2 - Made sure no 3rd party firewalls were installed
3 - Made sure correct computer name in DNS is resolving correct IP
4 - Made sure PC was turned ON
5 - Made sure all WMI settings are correct

I am able to ping and remote desktop to these computers (windows XP SP2 and SP3) but lansweeper isn't picking them up. Any help is appreciated.

[Hemoco]

Dcom must be enabled and then port 135 will be open.

[jasonbrink]

Would I be correct in saying port 135 needs to be accessible for Lansweeper to scan a machine? port 135 is for microsoft DCOM access? Would their be a way to manually open port 135 on a remote workstation?

[jasonbrink]

If I type telnet computername on any computer on our domain, I get "Could not open connection to the host, on port 23: Connect failed".

If I type telnet computername 135 it just says "Connecting to computername..." and just sits there with a blinking cursor.

Hmmm

[Hemoco]

You should get a blank screen with a blinking cursor if it works.
If it fails you get "Could not open connection to the host, on port 135"

[jasonbrink]

Would I just type from a telnet prompt "telnet computername 135" ?? If so, it doesn't work.

[Hemoco]

Are you able to manually telnet to port 135 to the machine?

[jasonbrink]

I found the connection tester in the lansweeper program directory.

When I test the computer I'm having issues with, I'm now getting:

\root\cimv2 Remote WMI access test FAILED
The RPC server is unavailable. (Exception from HRSEULT: 0x800706BA)

[jasonbrink]

Where/what is the connectiontester? Do I run that from server or client?

Below is the screenshot of the netsh firewall show state from the client...

I ran that command and saved as firewall.cmd and it didn't fix it. We don't run the firewall on the clients.

[Hemoco]

Could you try the connectiontester for both fqdn,computername and ip address.

Could you post the output of "netsh firewall show state"

run these commands to manually set the firewall:

call netsh firewall set service RemoteAdmin enable
call netsh firewall add portopening protocol=tcp port=135 name=DCOM_TCP135
call netsh firewall add allowedprogram program=%windir%\system32\wbem\unsecapp.exe name=WMI
call netsh firewall add allowedprogram program=%windir%\system32\dllhost.exe name=Dllhost