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Special Forums Cybersecurity how to hide the IP in the email header? Post 5286 by Neo on Thursday 9th of August 2001 10:36:41 PM
Old 08-09-2001
Also, I must take some issue with the broad statment:

.... security by obscurity never works....


Security-by-obscurity is not considered a very secure form of security, but we all use security-by-obsurity every day of our lives. The Department of Defense is the US has many 'obscurity' techniques and processes used to augument security management and security services.

In fact, obscurity can be a great enhancement to a very solid 'non obscurity program'.

For example: take the user name ROOT. I have plenty of servers where we have removed the user name ROOT and replaced it with something else, say 'barbara'. So, someone sniffing the network when you accidently login as 'barbara' might not be so excited because they are looking for 'root'. Of course, the UID is still 0 and 'barbara' is not the name of the superuser. However, a little obscurity can help and does.

Same is true with TELNET. Change the port to something else and port scanners get really confused.

Same is true with SENDMAIL. Change the configuration file to say 'welcome to sendmail version 2.3' and the version is so different than anything in the exploit database that the 'obscurity is very useful'.

Same is true for a login MOTD and getty. Instead of 'Welcome to Linux Version 1.2' many change the TELNET return to read 'Welcome to Fore ATM Switch Fabric' Smilie Or even 'Welcome to Microsoft 2000 Professional' Smilie ... when you are running UNIX!! The indications and ramifications are obvious.

I totally agree, obscurity is not great, but it does have some nice applications that are useful combined with other stronger methods Smilie
 

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XDG-EMAIL(1)							 xdg-email Manual						      XDG-EMAIL(1)

NAME
xdg-email - command line tool for sending mail using the user's preferred e-mail composer SYNOPSIS
xdg-email [--utf8] [--cc address] [--bcc address] [--subject text] [--body text] [--attach file] [mailto-uri | address(es)] xdg-email {--help | --manual | --version} DESCRIPTION
xdg-email opens the user's preferred e-mail composer in order to send a mail to address(es) or mailto-uri. RFC2368 defines mailto: URIs. xdg-email limits support to, cc, subject and body fields in mailto-uri, all other fields are silently ignored. address(es) must follow the syntax of RFC822. Multiple addresses may be provided as separate arguments. All information provided on the command line is used to prefill corresponding fields in the user's e-mail composer. The user will have the opportunity to change any of this information before actually sending the e-mail. xdg-email is for use inside a desktop session only. It is not recommended to use xdg-email as root. See http://portland.freedesktop.org/wiki/EmailConfig for information on how the user can change the e-mail composer that is used. OPTIONS
--utf8 Indicates that all command line options that follow are in utf8. Without this option, command line options are expected to be encoded according to locale. If the locale already specifies utf8 this option has no effect. This option does not affect mailto URIs that are passed on the command line. --cc address Specify a recipient to be copied on the e-mail. --bcc address Specify a recipient to be blindly copied on the e-mail. --subject text Specify a subject for the e-mail. --body text Specify a body for the e-mail. Since the user will be able to make changes before actually sending the e-mail, this can be used to provide the user with a template for the e-mail. text may contain linebreaks. --attach file Specify an attachment for the e-mail. file must point to an existing file. Some e-mail applications require the file to remain present after xdg-email returns. --help Show command synopsis. --manual Show this manual page. --version Show the xdg-utils version information. ENVIRONMENT VARIABLES
xdg-email honours the following environment variables: XDG_UTILS_DEBUG_LEVEL Setting this environment variable to a non-zero numerical value makes xdg-email do more verbose reporting on stderr. Setting a higher value increases the verbosity. EXIT CODES
An exit code of 0 indicates success while a non-zero exit code indicates failure. The following failure codes can be returned: 1 Error in command line syntax. 2 One of the files passed on the command line did not exist. 3 A required tool could not be found. 4 The action failed. 5 No permission to read one of the files passed on the command line. CONFIGURATION
Visit http://portland.freedesktop.org/wiki/EmailConfig for information how to configure xdg-email to use the email client of your choice. EXAMPLES
xdg-email 'Jeremy White <jwhite@example.com>' xdg-email --attach /tmp/logo.png --subject 'Logo contest' --body 'Attached you find the logo for the contest.' 'jwhite@example.com' xdg-email --subject 'Your password is about to expire' 'jwhite@example.com' 'bastian@example.com' 'whipple@example.com' AUTHORS
Kevin Krammer Author. Jeremy White Author. COPYRIGHT
Copyright (C) 2006 xdg-utils 1.0 08/18/2014 XDG-EMAIL(1)
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