Re: [fw-wiz] OBSD reaction to CERT advisory

From: Daniel Hartmeier (danielat_private)
Date: Thu Oct 10 2002 - 08:25:22 PDT

  • Next message: Darren Reed: "Re: [fw-wiz] OBSD reaction to CERT advisory"

    On Thu, Oct 10, 2002 at 11:45:48PM +1000, Darren Reed wrote:
    
    > That brings me to another point, that was sorely missed in all the
    > public material I've seen so far, except maybe by Sun (and in the
    > wrong way) and that is you need a very special ftp daemon (i.e. not
    > any of the vendor ones I have tried) before it will stand a chance
    > of defeating IPFilter.
    
    How about the NetBSD ftpd?
    
      $ telnet ftp.netbsd.org 21
      Trying 2001:4f8:4:b:2e0:81ff:fe21:6563...
      Connected to ftp.netbsd.org.
      Escape character is '^]'.
      220 ftp.netbsd.org FTP server (NetBSD-ftpd 20020615) ready.
      HELP 227 Entering Passive Mode (h1,h2,h3,h4,p1,p2)
      502 Unknown command 227 Entering Passive Mode (h1,h2,h3,h4,p1,p2).
    
    ip_fil3.4.29/ip_ftp_pxy.c ippr_ftp_pasv() accepts that, when I tickle
    the server to retransmit the "227 ..." part, no?
    
    Daniel
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