10-11-2001
This can be used to help defeat OS guessing in tools like queso and nmap. It's one of the easiest changes you can make to mess with the results. I recall that there were a few such hints/hacks in Hacking Linux Exposed...
The best part, however, is that the 2.4.* series kernels are able to obfuscate the OS completely. Any nmap scan will report that you are whoever you choose to be - for example, you can make yourself appear to the casual scanner to be a MacOS 7.1 machine, or a HP LaserJet Printer!
Check out the
netfilter man pages, and this link:
http://sourceforge.net/projects/ippersonality/
Happy obfuscating!
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LEARN ABOUT DEBIAN
urn-scheme
uri_urn(3tcl) Tcl Uniform Resource Identifier Management uri_urn(3tcl)
__________________________________________________________________________________________________________________________________________________
NAME
uri_urn - URI utilities, URN scheme
SYNOPSIS
package require Tcl 8.2
package require uri::urn ?1.1.2?
uri::urn::quote url
uri::urn::unquote url
_________________________________________________________________
DESCRIPTION
This package provides two commands to quote and unquote the disallowed characters for url using the urn scheme, registers the scheme with
the package uri, and provides internal helpers which will be automatically used by the commands uri::split and uri::join of package uri to
handle urls using the urn scheme.
COMMANDS
uri::urn::quote url
This command quotes the characters disallowed by the urn scheme (per RFC 2141 sec2.2) in the url and returns the modified url as its
result.
uri::urn::unquote url
This commands performs the reverse of ::uri::urn::quote. It takes an urn url, removes the quoting from all disallowed characters,
and returns the modified urls as its result.
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category uri of
the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for
either package and/or documentation.
KEYWORDS
rfc 2141, uri, url, urn
CATEGORY
Networking
uri 1.1.2 uri_urn(3tcl)