When a server has more then one IP address, then postfix will use all IP addresses randomly to send out emails. This can cause your emails to be listed as SPAM on other servers because the sending IP does not
I've got the following error message on Debian Linux (6.0) with Courier IMAP server: Filesystem notification initialization error -- contact your mail administrator (check for configuration errors with the FAM/Gamin library) when I tried to access a IMAP share. The
The following guide explains the installation of the apache module "mod_evasive". Mod_evasive tracks the number of requests of files at the apache webserver and blocks the delivery in case that a certain limit has been reached. Installation apt-get install libapache2-mod-evasive
To change the language of the website statistics generated by AWStats on a Debian Linux server to e.g. german (de), edit the /etc/awstats/awstats.conf file: nano /etc/awstats/awstats.conf and change the value of the "Lang" variable. To change the languge to e.g.
If you get the error "/dev/zero: No space left on device" in the apache error.log on a OpenVZ virtual machine, then the shared memory size in the xcache.ini is too high or the xcache.mm_path is set wrong. Edit the file
The /tmp and /dev/shm directories of a OpenVZ virtual machine shall be mounted without suid and exec permissions. To achieve this, create a a shell script on the host server for every virtual machine which contains the commands to remount
In case you plan to virtualize your server infrastructure and migrate physical servers to OpenVZ virtual machines, you may find this tutorial helpful: http://wiki.openvz.org/Physical_to_container I used this to migrate a ISPConfig Debian system to OpenVZ successfully.
If you use a mailserver wil very low ram (< 500 MB) and a slow CPU then it might be nescessary to disable the spam- and antivirus filter functions in ISPConfig 3 as amavisd and clamav might be too heavy
The pure-ftpd package that comes with Debian 5.0 (Lenny) does not start in a OpenVZ virtual machine as it is compiled with "capabilities". This tutorial describes the steps to build a pure-ftpd Debian package with capabilities disabled: Make a temporary
Some internet access providers have port 25 disabled in their routers to prevent spam. If you run your own mailserver in a datacenter, you might have to enable the submission port (587) in postfix to be able to send emails