The relentless onslaught of spam continues to drive mail administrators up the proverbial wall. DMARC, the unofficial successor to SPF (Sender Policy Framework), holds the promise of more email legitimacy, but can it deliver? Here is how you can put DMARC to the test.
The rise of Quantum computing and the cloud is rewriting the rules of what constitutes “encrypted” communications — with profound implications for the cyber security of our homeland.
“The cyber threat landscape is shifting in real-time, and we have reached a historic turning point,” said Kirstjen Nielsen, U.S. Secretary of Homeland Security, in a recent statement. “It is clear that our cyber adversaries can now threaten the very fabric of our republic itself.”
Cybersecurity incidents and data breaches of recent years seem to provide evidence of an invisible warfare raging across the industrialized world with financial, energy and communications systems covertly under constant threat. At the same time, the dependence on data integrity and the reliability of critical infrastructures, particularly cyber physical systems in the military, is growing in importance by the day.
There are two basic ways to migrate a mail server from one machine to another: with and without service downtime.
When setting up https on an existing server, you need to provide a redirect for all those visitors arriving via http backlinks. Here is how to do this.
The rsync utility can backup files, synchronize directory trees, and much much more, both on the local machine and between two different hosts—via push and pull. Here is how to tame it.