[Info-vax] EISNER access will be SSH-only

[Steven Schweda]

> [...] No actual EISNER user has logged in via TELNET
> since 1-DEC-2020, but there have been thousands of attempted logins via
> TELNET. [...]

   It won't affect me, but why not just move Telnet from port 23 onto,
say, 2023 (or almost any unpopular port), and publicize it?  I allow
wrong-port Telnet access on my server, and I see about four probes/year
(none of which is an actual log-in attempt).

   I don't use 22 (externally) for SSH, either.  Same reason, similar
results.