Adding a DKIM record to your DNS
Adding a DKIM record to your DNS is quite simple. First, your create a key pair with openssl: openssl genrsa -out private.key 1024 openssl rsa -in private.key -pubout -out public.key…
Get telnet and ftp client back on macOS High Sierra
Apple, in their ultimate wisdom, have removed telnet and ftp client on macOS High Sierra. It is true. You should not use these commands anymore to do unencrypted management on…
Start a TFTP server on your Mac
Activate the tftp server on your Mac: To change the properties, edit the file /System/Library/LaunchDaemons/tftp.plist The default directory is /private/tftpboot. Make this directory accessible for everybody. sudo chmod 777 /private/tftpboot…
Keyboard shortcuts for your Mac at boot time
Keep one of these keys pressed at system start: ⌘ Command key ⌃ Control key ⌥ Option key ⇧ Shift Key ⇪ Caps Lock fn Function Key C Boots…
FortiGate Session Timeout
This article describes how to change the session TTL for a specific port. In this example it is telnet. config system session-ttl set default 1800 config port edit 1 set…
Files containing the EICAR String
If you want to test your Antivirus Scanner, you can use the test string from the European Institute for Computer Antivirus Research ⇒"EICAR". Put this string into a file. Send it,…