Anthrax telnetted into the gateway. A gateway binds two different
networks. It allows, for example, two computer networks which talk
different languages to communicate. A gateway might allow someone on a
system running DECNET to login to a TCP/IP based system, like a Unix.
Anthrax was frustrated that he couldn't seem to get past the System X
gateway and on to the hosts on the other side.
Using normal address formats for a variety of networks, he tried
telling the gateway to make a connection. X.25. TCP/IP. Whatever lay
beyond the gateway didn't respond. Anthrax looked around until he
found a sample of addresses in a help file. None of them worked, but
they offered a clue as to what format an address might take.
Each address had six digits, the first three numbers of which
corresponded to telephone area codes in the Washington DC area. So he
picked one of the codes and started guessing the last three digits.
Hand scanning was a pain, as ever, but if he was methodical and
persistent, something should turn up. 111. 112. 113. 114. 115. On it
went. Eventually he connected to something--a Sunos Unix system--which
gave him a full IP address in its login message.
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