I will briefly describe the Linux directory structure:Continue reading “Linux file system and directory structure”
I will give a few explanations:Continue reading “What is the difference between Windows x32 and Windows x64”
In this article I will provide a list and description of existing Wi-Fi frequencies, standards.Continue reading “List and description of existing Wi-Fi frequencies, standards”
I will give a small list of some popular network protocols, the ports that they use and their brief description:Continue reading “List of network protocols and ports”
In this article I will give an example of generating keys and adding DKIM records.Continue reading “How to add DKIM record”
DMARC recors allow recipients and senders to verify the authenticity of messages, as well as determine what to do with messages that are not DKIM validated.Continue reading “How to add DMARC record”
You can buy a domain and hosting from a domain name registrar, for example godaddy.com
After the purchase you will need to configure the DNS settings in the control panel on the site where it is registered.Continue reading “How to buy and setup a domain”
I will give an example of adding MX records in the DNS settings of a domain name registrar.Continue reading “How to add MX record”
For example, take the server with the operating system Ubuntu Server 14.04, in which let’s say we changed the network settings when executing the commands:Continue reading “Why service networking restart or /etc/init.d/networking restart does not work”
In this article I will briefly describe the difference between MASQUERADE and SNAT.
MASQUERADE. Less fast routing than SNAT with mass requests, since for each new connection an IP address on the external network interface (WAN) is determined. Great for home use routers and when changing the IP address on the WAN interface.
Continue reading “Difference between MASQUERADE and SNAT”