Debug traces
Table 1 describes options that relate to user-controlled trace information.
| Option | Sub-Option | Description |
|---|---|---|
| -t | Internal tracing, intended to replace the DIAGNOSTICS compile option currently in place within the BSD code. | |
| -D | authentication | Turns on authentication debugging code. |
| -D | encryption | Turns on encryption debugging code. |
| -D | options | Prints information about the negotiation of TELNET options. |
| -D | report | Prints the options information, plus some additional information about what processing is going on. |
| -D | netdata | Displays the data stream received by telnetd. |
| -D | ptydata | Displays the data stream written to the pty. |
| -D | all | Supports all options/report/ptydata/netdata/authentication/encryption options. |