firewall vs. closing ports Post: 15078

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Special Forums Cybersecurity firewall vs. closing ports Post 15078 by LivinFree on Saturday 9th of February 2002 09:25:57 PM

02-09-2002

Registered User

I see Neo's point here in what 'the best' config would be. I guess I just like seperating each service in it's own area - For example, my ideal config for most (but not all) situations would be to have a seperate fileserver, web server, firewall, etc. That way, you could perform mainenance on your webserver without downing your whole network. But, then again, if the only external contact you've got is the webserver, it wouldn't make any difference - either it's up, or it's down.

I guess the question about attacking a box without any open ports could be a very tricky one. The best thing I can think of is a simple DoS. Packet the heck out of the machine, and if nothing else, it at least absorbs your bandwidth. You really can't do that much about it, except try to block it as far upstream as possible. But an "exploit" should never work against a non-listening port. If no process is spawned upon connection (like in inetd), and no process is already listening, what exactly could you possibly attack?

LivinFree

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LEARN ABOUT LINUX

config.guess

CONFIG.GUESS(1) 						   User Commands						   CONFIG.GUESS(1)

NAME

       config.guess - guess the build system triplet

SYNOPSIS

       config.guess [OPTION]

DESCRIPTION

       The GNU build system distinguishes three types of machines, the `build' machine on which the compilers are run, the `host' machine on which
       the package being built will run, and, exclusively when you build a compiler, assembler etc., the `target' machine, for which the  compiler
       being built will produce code.

       This script will guess the type of the `build' machine.

       Output the configuration name of the system `config.guess' is run on.

   Operation modes:
       -h, --help
	      print this help, then exit

       -t, --time-stamp
	      print date of last modification, then exit

       -v, --version
	      print version number, then exit

ENVIRONMENT VARIABLES

       config.guess  might  need  to  compile  and  run  C  code,  hence it needs a compiler for the `build' machine: use the environment variable
       `CC_FOR_BUILD' to specify the compiler for the build machine.  If `CC_FOR_BUILD' is not specified, `CC' will be used.  Be sure  to  specify
       `CC_FOR_BUILD' is `CC' is a cross-compiler to the `host' machine.

	 CC_FOR_BUILD	 a native C compiler, defaults to `cc'
	 CC		 a native C compiler, the previous variable is preferred

REPORTING BUGS

       Report bugs and patches to <config-patches@gnu.org>.

       Originally written by Per Bothner.  Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.

       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       autoconf(1), automake(1), autoreconf(1), autoupdate(1), autoheader(1), autoscan(1), config.guess(1), config.sub(1), ifnames(1), libtool(1).

config.guess (2005-09-19)					  September 2005						   CONFIG.GUESS(1)