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π¦ computer file anti-leakage systems :
1) The computer file anti-leakage system based on C/S architecture usually installs the management terminal on a computer in the LAN, installs the client on the controlled computer in the LAN, and then actively connects to the client through the management terminal and sends the computer to the client File encryption instruction, the client computer file is encrypted to prevent leakage of computer files.
2) Aiming at the channel for computer file leakage, the current mainstream computer file anti-leakage system in China usually effectively controls the external computer equipment. It prevents the passage by prohibiting the computer USB port, disabling optical drive burning, and prohibiting Bluetooth and PCI devices. Such external devices leaked secrets.
3) For the leakage of network channels, similar computer file anti-leakage systems, on the one hand, set to prohibit computers from accessing the Internet, on the other hand, it encrypts external files to prevent files from being sent through mailboxes, network disks, chat software, and other network channels. The computer file was sent out and the secret was leaked.
4) Many traditional computer file anti-leakage systems use the clipboard of the HOOK client computer to prevent the copying of computer files. However, because many copying and cutting actions of third-party software do not need to be implemented through the clipboard, it directly leads to The failure of this control method.
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π¦ computer file anti-leakage systems :
1) The computer file anti-leakage system based on C/S architecture usually installs the management terminal on a computer in the LAN, installs the client on the controlled computer in the LAN, and then actively connects to the client through the management terminal and sends the computer to the client File encryption instruction, the client computer file is encrypted to prevent leakage of computer files.
2) Aiming at the channel for computer file leakage, the current mainstream computer file anti-leakage system in China usually effectively controls the external computer equipment. It prevents the passage by prohibiting the computer USB port, disabling optical drive burning, and prohibiting Bluetooth and PCI devices. Such external devices leaked secrets.
3) For the leakage of network channels, similar computer file anti-leakage systems, on the one hand, set to prohibit computers from accessing the Internet, on the other hand, it encrypts external files to prevent files from being sent through mailboxes, network disks, chat software, and other network channels. The computer file was sent out and the secret was leaked.
4) Many traditional computer file anti-leakage systems use the clipboard of the HOOK client computer to prevent the copying of computer files. However, because many copying and cutting actions of third-party software do not need to be implemented through the clipboard, it directly leads to The failure of this control method.
don't clone our tutorials
@UndercodeTesting
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π¦π΅οΈββοΈ How to display banner / message before OpenSSH authentication :
Want to display a message or banner before OpenSSH authentication (SSHD server)?
1) Try this simple trick to show an ASCII banner or logo on your Linux or Unix system.
3) OpenSSH has a built-in configuration option called Banner.
4) The contents of the specified file are sent to the remote user before authentication is allowed.
5) If the "banner" parameter is set to "no", then no banner is displayed when using the ssh command or client.
6) By default, no banner is displayed and this setting is disabled.
π¦You can also post a legal notice if required by local law.
see also:
1) How to set your banner in Metasploit
How to display banner / message before OpenSSH authentication
Log into the remote Linux and Unix server.
Edit the file / etc / ssh / sshd_config.
Add / change configuration parameter. For example: Banner / etc / ssh / my_banner
Save and close the file.
2) Make sure you create a new file called / etc / ssh / my_banner file.
Restart the sshd service. For instance:
# Linux #
sudo systemctl reload ssh.service
# FreeBSD #
sudo /etc/rc.d/sshd restart
# OpenBSD #
doas /etc/rc.d/sshd restart
3) Example banner / message file for sshd
Here is my file:
$ cat /etc/ssh/my_banner
Output:
. _____
| | / | _ ______ ____ _____ / ____ \ ___________
| \ \ / ___ // \ _ / ___ \ \ / _ \ _ \ | \
| || | \ ___ \\ ___ / \ \ ___ | | (<_>) | \ / | /
| || | / ____> \ ___> \ ___> | \ ____ / | __ | | ____ /
\ / \ / \ /
Testing
Let's test our SSH client.
4) It is a program for logging into a remote computer and for executing commands on that system.
As you know, ssh server and client provide secure encrypted communication between two untrusted hosts on an insecure network like LAN or Internet.
5) Use your favorite search engine and enter:
ASCII art
6) Another option is to use the figlet command to display large characters composed of normal screen characters.
7)We also have a toilet command that prints out text using large characters composed of smaller characters.
It is similar to a FIGlet with additional features such as Unicode handling, color fonts, filters, and various export formats.
π¦For instance:
$ figlet nixCraft
$ toilet -f mono12 -F metal itsecforu
# figlet itsecforu > /etc/ssh/my_banner
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@UndercodeSecurity
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π¦π΅οΈββοΈ How to display banner / message before OpenSSH authentication :
Want to display a message or banner before OpenSSH authentication (SSHD server)?
1) Try this simple trick to show an ASCII banner or logo on your Linux or Unix system.
3) OpenSSH has a built-in configuration option called Banner.
4) The contents of the specified file are sent to the remote user before authentication is allowed.
5) If the "banner" parameter is set to "no", then no banner is displayed when using the ssh command or client.
6) By default, no banner is displayed and this setting is disabled.
π¦You can also post a legal notice if required by local law.
see also:
1) How to set your banner in Metasploit
How to display banner / message before OpenSSH authentication
Log into the remote Linux and Unix server.
Edit the file / etc / ssh / sshd_config.
Add / change configuration parameter. For example: Banner / etc / ssh / my_banner
Save and close the file.
2) Make sure you create a new file called / etc / ssh / my_banner file.
Restart the sshd service. For instance:
# Linux #
sudo systemctl reload ssh.service
# FreeBSD #
sudo /etc/rc.d/sshd restart
# OpenBSD #
doas /etc/rc.d/sshd restart
3) Example banner / message file for sshd
Here is my file:
$ cat /etc/ssh/my_banner
Output:
. _____
| | / | _ ______ ____ _____ / ____ \ ___________
| \ \ / ___ // \ _ / ___ \ \ / _ \ _ \ | \
| || | \ ___ \\ ___ / \ \ ___ | | (<_>) | \ / | /
| || | / ____> \ ___> \ ___> | \ ____ / | __ | | ____ /
\ / \ / \ /
Testing
Let's test our SSH client.
4) It is a program for logging into a remote computer and for executing commands on that system.
As you know, ssh server and client provide secure encrypted communication between two untrusted hosts on an insecure network like LAN or Internet.
5) Use your favorite search engine and enter:
ASCII art
6) Another option is to use the figlet command to display large characters composed of normal screen characters.
7)We also have a toilet command that prints out text using large characters composed of smaller characters.
It is similar to a FIGlet with additional features such as Unicode handling, color fonts, filters, and various export formats.
π¦For instance:
$ figlet nixCraft
$ toilet -f mono12 -F metal itsecforu
# figlet itsecforu > /etc/ssh/my_banner
@UndercodeTesting
@UndercodeHacking
@UndercodeSecurity
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