Linux inetd..

[mood () INVALID ORG (moOd)]

Description:

  I've found that inetd on (*atleast*) Debian distribution of LiNUX crashes
  when port 13 (daytime) / port 37 (time) is "half-open scanned"..


  Half-open scanning means that you:

    1) send SYN
    2) if reply is SYN|ACK, send RST  = port is listening
    3) if reply is RST                = port is not listening


  I'm not skilled enough to write the code-piece for you to test this out,
  but most of the new portscanner include this type of scanning method.
  (scantcp 1.32, sirc, etc.)


Quick & dirty workaround:

  Comment out daytime & time services from /etc/inetd.conf and restart inetd.



- -------

  / moOd [@invalid.org]