Yet another RPC error

[Patrickc]

First of all i love this software!!! 🙂
ok so We've got close to 600 computers and servers in 4 different domians that we are scanning
I am getting the RPC server unavailable for a handfull of computers (it varries between 15-30 computers)
We have the built in windows firewall turned off by default.
I've checked to make sure that rpc is running on these computers and i've checked to make sure WMI is running
I've ran the test connection from the lansweeper server and it fails for both WMI and RPC. I AM able to ping the computer name from the lansweeper server though. I am starting to get frusterated now so I'm turning to the forum. I have tried running the repair wmi script on a few computers but it does error out on a bunch of processes and that script is being ran by an administrator account.

I have tried running the wmi diagnose tools but I'm not really sure how to use it and I've skimmed over the documentation but I have not spent enought time on that to fully understand out to use this.
Anybody have any ideas or things I can try?
Thanks

[Hemoco]

Some things to check.
-Can the lansweeper server succesfully resolve the hostname of the computer? Does it resolve to the correct IP address?
-If you are using reverse lookup zones: check if the reverse lookup is ok.
-Check for third party firewalls on the computer.
-use this script to manually disable 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

[Patrickc]

Lansweeper wrote:
Some things to check.
-Can the lansweeper server succesfully resolve the hostname of the computer? Does it resolve to the correct IP address?
-If you are using reverse lookup zones: check if the reverse lookup is ok.
-Check for third party firewalls on the computer.
-use this script to manually disable 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

1. The lansweeper server does resolve the hostname of the computer both by name and FQDN to the correct ip address
2. revers lookup zones are correct
3. as far as I know we do not have any 3rd party firewalls installed or running
4 the script does not work since the firewall is already disabled.

I am unable to ping the hostname of the server from some of the problem comptuers,( but this is because its in a different domain) but it does resolve when I ping the FQDN.

I am able to manually scan it by running the lsclient /showresult however even though on the comptuer it connnects sucessfully, on the server it still shows this error Wmierror The RPC server is unavailable 0x800706BA

[Hemoco]

Patrickc wrote:

I am able to manually scan it by running the lsclient /showresult however even though on the comptuer it connnects sucessfully, on the server it still shows this error Wmierror The RPC server is unavailable 0x800706BA

lsclient just informs the server: "please scan me"

Can you post a list of installed software?