Linux, programming and more
local_sender_blacklist
This is a onboard exim possibility to blacklist special addresses, its only a optional file which contains a list of envelope senders whose messages will be denied;
1 | 550-sender envelope address noreply@rustock.net is locally blacklisted here |
Example of content:
1 2 3 | cat /etc/exim4/local_sender_blacklist noreply@rustock.net parker.ball@freeemailservice.info |
Restart or reload of exim is not required.
This is my second OpenVPN road warrior setup, I write this post from my first pre created drafts. Its more than one year ago, I combined some steps and command, to make it human readable and a little bit friendly :)
Setup map:
First we need to install the needed OpenVPN package:
1 | apt-get update && apt-get install openvpn |
Copy the helper scripts to make the life easier, they will help you to create keys and certificates: [Read more…]
Firefox is my default browser and I´am still fascinating about the variety of the tipps and tricks.
I want to collect some of my favorite tipps and hot keys in this post.
Disable anti virus check:
To increase the performance of your browser, disable anti virus scan after each download: [Read more…]
SSH-tunnels are very useful to access server or PCs behind firewall. Normally these components are behind NAT and have only a LAN-IP. To access them you will need to create a DNAT rule but this possibility is not secure like SSH protocol.
To create a ssh tunnel you need only a running ssh-server on the firewall of your destination site.
Some days ago I was informed by Ananjan Chaudhuri about the new OpenVPN 2 Cookbook written by Jan Just Keijser, I love OpenVPN and I took a look in to the free sample chapters. I found them really interesting, because I use OpenVPN to establish secure tunnel between my WAN MySQL-Server Databases and my email server.
To red my private emails on my mobile phone I prefer to use a secure connection to my IMAP-server.
Ananjan offered me [Read more…]