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Old 10-05-2010, 01:34 AM   #1
pinga123
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Display a legal warning before login.


How would i force All connection oriented network services to display a legal warning in terms of banner before any fuctional operation by user?
 
Old 10-05-2010, 01:38 AM   #2
prayag_pjs
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List the services !!
 
Old 10-05-2010, 01:41 AM   #3
prayag_pjs
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For FTP server:

To change the greeting banner for vsftpd, add the following directive to the /etc/vsftpd/vsftpd.conf file:

Quote:
ftpd_banner=<insert_greeting_here>
Replace <insert_greeting_here> in the above directive with the text of the greeting message.

For mutli-line banners, it is best to use a banner file. To simplify management of multiple banners, place all banners in a new directory called /etc/banners/. The banner file for FTP connections in this example is /etc/banners/ftp.msg. Below is an example of what such a file may look like:

####################################################
# Hello, all activity on ftp.example.com is logged.#
####################################################

For SMTP(if using postfix)

edit /etc/postfix/main.cf

Quote:
smtpd_banner = $myhostname ESMTP $mail_name\n
\n System Info: This is a Postfix mail server\n . running a multiline SMTP greeting patch\n
\n Please don't send me SPAM here - we don't like it
For SMTP(if using sendmail)

define(`confSMTP_LOGIN_MSG', `somehost.com \n System is being Monitored')dnl

Telnet greeting message:

Quote:
Edit file /etc/issue
SSH : Secure shell login greeting message:

Quote:
Edit file /etc/ssh/sshd_config
Edit/enable the line: Banner /etc/issue
Restart sshd: service sshd restart
GDM login message:
Quote:
Edit /etc/X11/gdm/gdm.conf as shown above. Configure "Welcome" option.

Last edited by prayag_pjs; 10-05-2010 at 01:54 AM.
 
Old 10-05-2010, 01:49 AM   #4
pinga123
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Quote:
Originally Posted by prayag_pjs View Post
For FTP server:

To change the greeting banner for vsftpd, add the following directive to the /etc/vsftpd/vsftpd.conf file:



Replace <insert_greeting_here> in the above directive with the text of the greeting message.

For mutli-line banners, it is best to use a banner file. To simplify management of multiple banners, place all banners in a new directory called /etc/banners/. The banner file for FTP connections in this example is /etc/banners/ftp.msg. Below is an example of what such a file may look like:

####################################################
# Hello, all activity on ftp.example.com is logged.#
####################################################

For SMTP(if using postfix)

edit /etc/postfix/main.cf



For SMTP(if using sendmail)

define(`confSMTP_LOGIN_MSG', `somehost.com \n System is being Monitored')dnl
I would like it for SSH since its been use by many user.
 
Old 10-05-2010, 04:39 AM   #5
pinga123
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This is what i did and it worked sharing for others.

Create a file called /etc/ssh/sshd-banner.

Paste the customized banner message in it.
For example:
Quote:
"This Machine is for the exclusive use of XYZ organization and Unauthorized access or breach of these terms may result in termination of your authorization and/or criminal penalties."
edit /etc/ssh/sshd_config with following entry

Banner /etc/ssh/sshd-banner


Restart sshd service using.

Quote:
#service sshd restart
To validate the changes:
Try to login to the server using putty.
put username and press enter .
You should get banner displaying text under /etc/ssh/sshd-banner file.

For example:

Quote:
login as: root
This site is for the exclusive use of Oracle and its authorized customers and partners. Use of this site by customers and partners is subject to the Terms of Use and Privacy Policy for this site, as well as your contract with Oracle. Use of this site by Oracle employees is subject to company policies, including the Code of Conduct. Unauthorized access or breach of these terms may result in termination of your authorization to use this site and/or civil and criminal penalties.
root@'s password:
 
  


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