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 Message 547 
 Bj”rn Felten to All 
 How to handle the port 23 script kiddies 
 14 Mar 18 00:41:13 
 
I really do want to keep my port 23 open, so that my users can telnet to my
BBS.

   But as most of you probably know, there's a huge operation going on with
hijacked computers trying to connect to other port 23 computers.

   Well, if you like me have Argus setup to answer incoming port 23 calls, you
probably know that there's very little double escape character response. So
how do you handle this?

   In the Doors setup the only nonprintable character available is the escape
character (a backslash). If character/return had something like that it would
be much easier. But here's how I've done it:

   http://felten.se/ny.jpg

   Originally I was planning on sending a huge response (as in typing a big
exe-file) but I abandoned that idea since it meant that my system was hanging
after the remote system quickly disconnected.

   But the 'type' command does not compute (you need 'cmd type' to make it
work), so the connection swiftly is disconnected.

   As always: RFC...  8-)

..

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