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Home Archives for cloud, edge and everything in between administration and orchestration
How to get a grip on your log files growing outta control: set up and force logrotate

Cloud Insidr 2016-08-24 Leave a Comment

How to get a grip on your log files growing outta control: set up and force logrotate

Logs that grow in size uncontrollably can cause unintended consequences. If you keep ignoring the situation, it will only get worse until you run our of disc space, the system starts being unresponsive or processes begin to crash.

[Read more…]

Filed Under: administration and orchestration, databases, Linux, mail servers, web servers in the cloud Tagged With: Dovecot, logs

A fatal flaw in TCP on Linux hijacks HTTPS connections. Here is the fix

Cloud Insidr 2016-08-12 Leave a Comment

A fatal flaw in TCP on Linux hijacks HTTPS connections. Here is the fix

If you are running Linux kernel 3.6 or newer, anyone in the world on a network that allows IP spoofing can hijack your encrypted communications in less than a minute, with a success rate of 90%.

Here is how to fix it.

[Read more…]

Filed Under: alerts, cloud, edge and everything in between, cybersecurity and cyber warfare, encryption, Linux Tagged With: cyber security, Linux, TCP

Optimizing Postfix access maps to block incoming spam based on sender’s address

Cloud Insidr 2016-08-11 Leave a Comment

Optimizing Postfix access maps to block incoming spam based on sender’s address

Here is how you can improve your Postfix access maps in order to block incoming spam based on sender’s address.

[Read more…]

Filed Under: administration and orchestration, mail servers Tagged With: anti-spam defense, postfix, postmap, smtpd, spam

How to Build a SELinux Module for MariaDB

Cloud Insidr 2016-07-24 Leave a Comment

How to Build a SELinux Module for MariaDB

When updating MariaDB, the popular successor to MySQL, you may, once upon a time, hit a roadblock which you won’t be able to track down in the error log. Even though web visitors get to see the plain text complaint “Can’t connect to the database”, the MariaDB server will be running just fine. Silent errors should be reason enough to suspect SELinux, the oftentimes dreaded and despised but equally popular Security-Enhanced Linux kernel module.

[Read more…]

Filed Under: administration and orchestration, cloud, edge and everything in between, cybersecurity and cyber warfare, databases, Linux, SELinux Tagged With: MariaDB, SELinux

You’ve Got Mail: The Changing Landscape of Email Services and the Emergence of Unified Communications

Cloud Insidr 2016-03-29 Leave a Comment

You’ve Got Mail: The Changing Landscape of Email Services and the Emergence of Unified Communications

In the universe of email and messaging, change is accelerating. The world of IT came up with a new marketable buzzword with earth-shaking repercussions: Unified Communications.

[Read more…]

Filed Under: industry analysis, mail servers Tagged With: AWS, Dovecot, email, Exchange Server, Gmail, postfix, Sendmail, Unified Communications, WorkMail

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