Caolan McNamara:

gvanrossum · gvanrossum · commit 823eb4ba8172 · 2000-05-02T14:32:11.000Z
telnetlib is unable to connect to a few telnet daemons because of
improper IAC handling, heres an attached oneliner to reject WILL
messages which will allow many more telnet daemons to work with it,
namely FreeBSD.
diff --git a/Lib/telnetlib.py b/Lib/telnetlib.py
@@ -329,6 +329,7 @@ def process_rawq(self):
                     opt = self.rawq_getchar()
                     self.msg('IAC %s %d',
                              c == WILL and 'WILL' or 'WONT', ord(c))
+                    self.sock.send(IAC + DONT + opt)
                 else:
                     self.msg('IAC %s not recognized' % `c`)
         except EOFError: # raised by self.rawq_getchar()
