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An SSH server is a computer program that accepts connections from client systems and allows data to be exchanged between the two network devices via secure channel using Secure Shell (SSH) protocol. SSH is used primarily to access shell accounts as a replacement for Telnet and other insecure remote shells. |
SSH monitor provides availability and operability monitoring for SSH servers. The service also provides remote script execution. This means the SSH monitoring service can be used for performing various administration tasks on remote systems.
Synchronization Details
SSH monitor performs the following operations during synchronization:
| 1. | Establishes connection to the SSH server. |
| 2. | Authenticates using name and password specified by service settings. |
| 3. | [Optional] Uploads script to the remote host. Script is specified in the settings' Script field as an explicit text or a file. Monitor first tries to upload script using scp; if the attempt fails it creates file using echo commands. |
| 4. | [Optional] Executes uploaded script using sh command. Script execution output is intercepted and saved in monitoring results. |
| 5. | Closes connection. |
If all the operations are executed successfully the SSH service is deemed Online. If no script is specified in service parameters (i.e. Script field is NULL) steps 3 and 4 are omitted; thus, only connection, authentication and disconnection operations are performed.
If an error was encountered during execution the service is denoted as Offline and error message is saved in Error field.
Additionally, an Execute script on remote server using SSH (executeRemoteScript) action is installed in Root context. It accepts connection settings and script as input parameters:
Property |
Name |
Description |
Address |
address |
Host address |
Port |
port |
Port number the SSH server is running on. |
Timeout, milliseconds |
timeout |
Timeout for SSH operations. |
User Name |
userName |
User name to use for authorization. |
Password |
password |
Password to use for authorization. |
Script |
script |
Script specified as explicit text or as a file; may be NULL. |
Results of the script execution are presented in the following format:
Property |
Name |
Description |
Successful |
successful |
Indicates that no error occurred during connection to SSH server, authorization, and remote script execution. |
Error |
error |
Error text, if any. |
Result |
result |
Output of a remote script. |