OpenDKIM will give Your mail a signature that will eventually lower the spam score of the mail comming from your domain. This will help signifficantly to exclude these mails from being considered as spamRead More…
Amavis-new – bad-header checks tweaking
During the processing of the emails Amavis-new conducts a series of tests, including so called bad-header checks which usually give a headache to system engineers because of false detections (most commonly aRead More…
Networking in Centos 7 minimal installation
Installing Centos 7 with a minimal install option will leave you in a funny situation, where no “net-tools” package is installed, so (as far as I can tell) you can’t bring upRead More…
Persistent routes in Centos
Persistent route (static, but not a default route) Say, you have route like this: route add -net 192.168.210.0/24 192.168.1.3 dev eth1 And you want to make it persistent (and oviously static) –Read More…
Web based bandwidth monitoring on a Linux gateway
I often need to know how much bandwidth is my linux gateway/router box using, specially if there’s any P2P traffic (torrents) and from which IP address on the LAN is it coming.Read More…
Implementing vsftpd userlist
In the former aricle the ftp server was made, with pam authentication. This means that any valid user on your linuxbox can log in with it’s username and password. If you wantRead More…
Login with PuTTY without password
It’s much easier to set up PuTTY to login without password to a remote machine. You will need to provide a key to the remote server that will authenticate you without passwordRead More…
Remote shutdown (or any command) on Linux
The easiest way to do a remote shutdown (or place any other command) is to have an ssh key for the root user. Here’s how to make one. After this you canRead More…
Part II: SSH alias
If you have a lot of hosts that you maintain, keeping their IP adresses in mind or on the record if the IP addess somewhere else, and pasting them every time youRead More…
Part I: Login using SSH without password
The aim of this article is to demonstrate how to login to your linux box without password. At start, there is no need for some special setup because the sshd on CentOSRead More…