WHM/cPanel is one of the most successful web hosting control panel. Especially popular among shared hostings, it came to me as a surprise that it lets you read files which belong to other users, including those containing database credentials (like, the whole contents wp-config.php belonging to other user’s WordPress installation, or configuration.php, being yet another user’s Joomla config file).
tcpdump can be quite useful for finding malware on a a busy server, where temporarily stopping the traffic will affect many users and thus is not recommended.
Note that it will be only useful if the malware is connecting to some external servers.
Continue reading ‘using tcpdump to detect malware presence’ »
If you ever wanted to use your Postfix with multiple SSL certificates for different domains, here is how.
Continue reading ‘Postfix and multiple SSL certificates’ »
If you ever wanted to use your Cyrus IMAP server with multiple SSL certificates for different domains, here is how.
Continue reading ‘Cyrus IMAP server and multiple SSL certificates’ »
For some time, large botnet installations have been attacking WordPress installations from many IPs, sometimes the number of attacking addresses was tens of thousands:
In theory, if you use a strong password, you should be safe – but there is one more reason to worry: these kinds of attacks can bring your server to a halt or make it very slow.
Is there any way to protect against it?
Debian Wheezy comes with Redmine 1.4.4. If you want to upgrade to Redmine 2.3.x using deb packages, here is how.
Debian Wheezy comes with PHP 5.4. If this is too new for your application and it doesn’t work properly, here is a short description on downgrading to PHP 5.3.
If you don’t like the idea of your lxc container to view dmesg output, which includes host’s data, here is a quick tip.
Continue reading ‘lxc: restricting container view of dmesg’ »
If you’re using Postfix and Amavis, you may be seeing “Error: queue file write error”, especially with larger than usually email rates.
Here is what you can do to get rid of them.
Continue reading ‘“Error: queue file write error” with Postfix and Amavis’ »
If you have a large MySQL dump file, but only need to restore a single table, you may use the following:
Continue reading ‘restoring a single table from a large MySQL dump file’ »