Below are common technical questions and answer that clients have asked.
Also there are trouble shooting tips and suggestions for testing connectivity and commands outside the product.
Attached to this article is the wmi_provider.zip that contains the wmi.provider.exe that this article
talks about for trouble shooting WMI outside of the product.The Plink.exe that is mention is installed with the rsp probe on deployment.
Below you will also find a link to trouble shooting WMI configurations.
Question: If I want to monitor a Windows system using an 'agentless' approach, RSP uses WMI, correct?
Answer: Yes, rsp uses WMI to monitor Windows systems.
Question: How does Nimsoft store the username/password in rsp?
Answer: We encrypt the input password (string) using the Twofish algorithm and the encryption key, after this encrypted string is base64 encoded. We use Base64 encoding technique with a predefined key to encrypt the password before writing to the rsp configuration file. In the rsp.cfg file username(s) configured via the GUI are listed but the passwords are encrypted.
Question: How does rsp communicate with end servers/target machines and can that communication be encrypted?
Answer: The rsp probe can connect to either Windows servers or Unix/Linux servers. When connecting to Windows systems it uses the WMI protocol to communicate. The WMI protocol uses NTLM authentication, which is encrypted and handled by the OS. When connecting to Unix, it uses SSH2 which is an open standard which uses encryption. The rsp probe uses WMI (using port 135) to gather remote data on Windows systems and native commands gathered either through ssh (using port 22) or telnet (using port 23) on UNIX/Linux systems.
Question: Can the WMI communication between the rsp probe and Windows target server to be monitored, be secured?
Answer: The WMI protocol uses NTLM authentication, which is encrypted and handled by the OS. You could potentially use SSH auth instead if configured for the given Windows target system.
Question: Does the rsp probe send username/password data every time it communicates with the target server?
Answer: The credentials are passed used/each time depending on what the probe is fetching when using wmiprovider.exe for instance:
e.g., wmi_provider -l wmitest.log -d 5 -s <server> -u <user> -p <password> -g disk
wmi_provider -l mylog.txt -d 5 -s <server> -u <user> -p <password> -g os
sample log entries:
rsp: send_login(xxxxxxx.xxx.com): got a password prompt, sending password
rsp: myWrite: password not logged...
and note that the password is not logged in the log file as per sample above.
Is there an rsp technical document? Answer:
There is currently no rsp tech brief or white paper available, just the current rsp Help documentation available online at: RSP Manual
Question: What commands are run by rsp for Windows or UNIX/Linux?
Answer: Command line details for the rsp probe are listed below but note that most calls are made via the probe interface, not via command line:
NOTE: For Windows, instead of using WMI_Provider.exe we are using a library. Exact WMI queries are given below.
You can also use the built in wbemtest in windows discussed in KB article:TEC000003504
For Unix, Plink is not used anymore, however the commands given against pLink hold true. They are fired using yhr OpenSSH library. Windows: Get OS:
wmi_provider.exe -s mehfa01-vm7300 -u Administrator -g osselect FreePhysicalMemory, TotalVisibleMemorySize, FreeSpaceInPagingFiles, SizeStoredInPagingFiles, Caption, Version, CSDVersion, OSLanguage, Locale from Win32_OperatingSystem Get CPUs:
wmi_provider.exe -s mehfa01-vm7300 -u Administrator -g cpuselect Name, AddressWidth, Architecture, DeviceID, LoadPercentage from Win32_Processor Get Disks:
wmi_provider.exe -s mehfa01-vm7300 -u Administrator -g diskselect DriveType, Name, Capacity, FreeSpace from Win32_Volume where DriveType=3 Get Services:
wmi_provider.exe -s mehfa01-vm7300 -u Administrator -g servicesselect Caption, State, StartMode, StartName from Win32_Service Get Paging:
wmi_provider.exe -s mehfa01-vm7300 -u Administrator -g paging'select SystemType from Win32_ComputerSystem
Get Process Table:
wmi_provider.exe -s mehfa01-vm7300 -u Administrator -g processes
select __PATH,Name,ProcessID,ParentProcessId,ThreadCount,Priority,ExecutablePath,KernelModeTime,UserModeTime,CommandLine from win32_process
wmi_provider.exe -s mehfa01-vm7300 -u Administrator -g memory
select AllocatedBaseSize, CurrentUsage, Name from Win32_PageFileUsage
wmi_provider.exe -s mehfa01-vm7300 -u Administrator -g load
select AllocatedBaseSize, CurrentUsage, Name from Win32_PageFileUsage
plink [options] [[email protected]
("host" can also be a PuTTY saved session name)
show verbose messages -load sessname
Load settings from saved session -ssh -telnet -rlogin -raw
force use of a particular protocol (default SSH) -P
port connect to specified port -l
user connect with specified username -m
file read remote command(s) from file -batch
disable all interactive prompts
The following options only apply to SSH connections:
-pw passw login with specified password
-L listen-port:host:port Forward local port to remote address
-R listen-port:host:port Forward remote port to local address
-X -x enable / disable X11 forwarding
-A -a enable / disable agent forwarding
-t -T enable / disable pty allocation
-1 -2 force use of particular protocol version
-C enable compression
-i key private key file for authentication
Question: What information is stored in the database.db file in the rsp directory?
Answer: The database file is called database.db and is in the rsp folder at nimsoft/probes/application/rsp/.
However, that is proprietary and we do not provide any tool to edit this file. Note:
The database.db does not store or contain username and password information. It acts as a small database containing tables and indexes for all of the rsp configuration and script/templates/command information.
What are the minimum rights required to collect data using the rsp probe?
Windows: Use Domain admin user or a local admin name on the computer.
You should add credentials for all servers that you want to monitor, because you need these credentials when creating monitoring profiles (see Adding a profile).
In the case of UNIX/Linux computers, you can allow the specified user to work with root user privileges, by selecting the Use sudo checkbox. By default, this checkbox is un-selected.
You must leave the credentials in place. They should not be removed.
Note: Non-admin access for rsp is NOT officially supported as the account must be able to access hosts, processes, services and events.
Question: How does rsp work when using SSH to connect to the target machine?
Answer: RSP first determines what authentication methods are supported by the server.
Depending on the configuration provided in rsp, it tries to login by using the following methods:-
- Key based (passwordless) using public–private key
- Password based
For more details on configuration of public/private key you may refer to latest help document.
Other details regarding Key based authentication can be obtained from respective rsp as it uses libssh which follows standard procedure.