"Hugo Cornwall "The Hacker's handbook"" - читать интересную книгу автора

Show Control Characters - This is a software switch to display
characters not normally part of the text that is meant to be read but
which nevertheless are sent by the host computer to carry out display
functions, operate protocols, etc. With the switch on, you will see
line feeds displayed as ^J, a back-space as ^H and so on; see
Appendix IV for the usual equivalents.
Using this device properly you will be able, if you are unable to
get the text stream to display properly on your screen, to work out
what exactly is being sent from the host, and modify your local
software accordingly.
Control-Show is also useful for spotting 'funnies' in passwords and
log-on procedures--a common trick is to include ^H (backspace) in the
middle of a log-on so that part of the full password is overwritten.
(For normal reading of text, you have Control-Show switched off, as
it makes normal reading difficult.)

Macros - This is the US term, now rapidly being adopted in the UK,
for the preformatting of a log-on procedure, passwords etc. Typical
connecting procedures to US services like The Source, CompuServe, Dow
Jones etc are relatively complicated, compared with using a local
hobbyist bulletin board or calling up Prestel. Typically, the user
must first connect to a packet- switched service like Telenet or
Tymnet (the US commercial equivalents of BT's PSS), specify an
'address' for the host required (a long string of letters and
numbers) and then, when the desired service or 'host' is on line,
enter password(s) to be fully admitted. The password itself may be in
several parts.
The value of the 'macro' is that you can type all this junk in
once and then send off the entire stream any time you wish by means
of a simple command. Most terminal emulators that have this feature
allow you to preformat several such macros.
From the hacker's point of view, the best type of macro facility
is one that can be itself addressed and altered in software:
supposing you have only part of a password: write a little routine
which successively tries all the unknowns; you can then let the
computer attempt penetration automatically. (You'll have to read the
emulator's manual carefully to see if it has software-addressable
macros: the only people who need them are hackers, and, as we have
often observed, very few out-and-out hacker products exist!)

Auto-dial - Some modems contain programmable auto-diallers so that
frequently-called services can be dialled from a single keyboard
command.


Again the advantage to the hacker is obvious--a partly- known
telephone number can be located by writing some simple software
routine to test the variables.
However, not all auto-dial facilities are equally useful. Some