UNUSUAL LOGIN ENTRIES - UUCP

Posted by admin

May 6, 2008

Sometimes, the login entry for a system might contain more than just
fields to expect the login prompt, send the username, expect the password
prompt, and send the password. For instance, if you have to go through a
multiplexer to get to the system, the login field would contain a subfield to
select the proper system from the multiplexer.
Sometimes, on systems, that use the Hayes smartmodem to dial out, the
phone number field may be left unused (will contain an arbitrary entry, such as
the word “UNUSED”), and the dialing command will be contained in the login
field. For example:
ripco Any ACU 1200 UNUSED “” ATDT13125285020 CONNECT \r ernumber: new
So, when you try to transfer a file with a Unix system called “ripco”:
“UNUSED” is sent to the Hayes smartmodem. Of course, this is not a valid Hayes
command, so it is ignored by the modem. Next, the system moves the login field.
The first expect subfield is “”, which means to expect nothing. It then sends
the string “ATDT13125285020″, which is a Hayes dialing comand, which will make
the modem dial 13125285020. When the string “CONNECT” is received (which is
what the smartmodem will respond with when it connects), the system sends a
carriage return and waits for the “Usernumber:” prompt. When it receives that,
it sends “new”. This completes the login.