telnet-probe (1) - Linux Man Pages
telnet-probe: lightweight telnet-like port probe
NAMEtelnet-probe - lightweight telnet-like port probe
SYNOPSIS$PCP_BINADM_DIR/telnet-probe [-c] [-v] host port
DESCRIPTIONtelnet-probe allows the pmdashping(1) daemons to establish connections to arbitrary local and remote service-providing daemons so that response time and service availability information can be obtained.
The required host and port number arguments have the same meaning as their telnet(1) equivalents.
The -v option causes telnet-probe to be verbose while operating.
Once the telnet connection has been established, telnet-probe reads from stdin until end-of-file, and writes all the input data to the telnet connection. Next, telnet-probe will read from the telnet connection until end-of-file, discarding whatever data it receives. Then telnet-probe exits.
To operate successfully, the input passed via telnet-probe to the remote service must be sufficient to cause the remote service to close the connection when the last line of input has been processed, e.g. ending with ``quit'' when probing SMTP on port 25.
By default telnet-probe will not produce any output, unless there is an error in which case a diagnostic message can be displayed (in verbose mode only) and the exit status will be non-zero indicating a failure.