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Cool IT News 91

Cool IT News 91

Julian Assange left position in the WikiLeaks. Microsoft published MS-DOS source code. Mozilla will monitor your security better.

Cool IT News 90

Cool IT News 90

Windows Server 2019 is coming. Java 11 will bring LTS. ICANN announced the date of change of DNSSEC cryptographic key.

Cool IT News 89

Cool IT News 89

Political correctness is in the IT too. Kernel is bigger by 225 000 code lines this year. LinuxDays have complete program and open registration.

Regular Fire Detection revision

Electrical Fire Detection System is alright

A regular control of Electrical Fire Detection System has been finished in the Coolhousing Datacenter last week. And result of the control was expected – everything is alright!


New dedicated servers offer

Dedicated servers - new offer

The Coolhousing Datacenter comes with a brand new offer of dedicated servers from Hewlett Packard Enterprise (HPE) and SuperMicro. And this is really great offer, from which you will definitely choose. Whatever you need a mailserver, storage, or basic server for virtualization, dedicated servers offered by Coolhousing will meet your demands.

Cool IT News 88

Cool IT News 88

Apple showed new iPhone and some news. NIX.CZ launched new optical circuit. LTS of kernel will be available very soon. This is cool IT news of the last week.

Cool IT News 87

Cool IT News 87

Google´s 20th birthday. Python is in the top 3 programming language. Let´s meet on the Ruby Stories in Brno. This is Cool IT News!

New features in VPS Windows

News in virtual server Windows

Virtual Servers with operational system Windows belong among the most popular Coolhousing Datacenter services. We deeply care on the quality of this service and we bring you two new features, that most of clients of this service will certainly appreciate.


Cool IT News 86

Cool IT News 86

This summertime ends and fall/autumn begins. Our Cool IT News never ends and always will be here for your IT knowledge.

What is a PTR record and how to set them

What is a PTR record and how to set them

PTR record is a piece of information based on which the DNS realises IP address ---> name translation. PTR records are not recorded in the same zone as the others (e.g. A or CNAME records) but in their own zone, the name of which starts with a seemingly strange word identifier (including something like addr arpa etc.) and ends with the reverse order of IP network octets. The problem with mail is the purpose PTR records are sometimes used for: if the client requires a service on the Internet, the inquiry is sent and the target server tries to perform a reverse translation based on the sender's IP -- if the PTR record and its zone exist and are "visible", the action results in translation to your domain name, thus confirming your existence. If the translation fails, some servers will deny their services.

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