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Home 2016 Archives for August 2016

Archives for August 2016

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

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