Flush DNS

Flush DNS: how to clear your DNS cache

Various operating systems, such as Windows or macOS, automatically save information about address resolution from systems and applications in the network in a DNS cache. For Linux there are also corresponding services, though they have to be installed by the user. The purpose of this practical cache is to speed up network traffic, which is particularly important on the internet. Why it’s useful to...

Microsoft Access alternatives at a glance

Microsoft Access alternatives: are there any free applications that achieve the same result?

MS Access is widely used office software and enables people with no prior programming knowledge to work with databases. The license for the program, however, is not exactly cheap. Several free alternatives to Microsoft Access promise to do essentially the same thing. But which are the best Microsoft Access alternatives? And can they actually keep up with the range of functions and standard of...

The best TeamViewer alternatives

Alternatives to TeamViewer

You don’t always have to use the market leader – this also applies to remote access. TeamViewer is still the most widely-used solution for remote management and online meetings, but there are numerous alternatives on the market which can be considered. We present some serious alternatives to TeamViewer.

Localhost

Localhost (127.0.0.1)

What do you need a localhost for? Sometimes it can be useful to communicate with yourself. This is known as a loopback in network technology: instead of feeding a request to the network – e.g. the internet – you instead keep it within your system, subsequently stimulating a network connection. We will explain how the connection to 127.0.0.1 works, and what you can use localhost for.

Ubuntu FTP server: Installation and configuration

Ubuntu FTP server: How the setup functions

For the past 30 years, the file transfer protocol (FTP) has supported computer users with the transfer of data in TCP/IP networks. FTP servers enabled not only the upload but also the download of files, in which each access is controlled via a separate connection. In this Ubuntu FTP server tutorial, you’ll learn how to install, configure, and run your own server under the Linux distribution.

SNMP tutorial

SNMP tutorial: how snmpwalk and snmpget work

The central monitoring and managing of network devices such as routers, switches, or firewalls is often carried out using the Simple Network Management Protocol (SNMP). Both snmpwalk and snmpget tools use SNMP messages, for example, to retrieve data sets of selected network participants. In our SNMP tutorial, we show what these two command line tools can do and how data retrieval works.

CIDR: Classless Inter Domain Routing

CIDR: what is classless inter-domain routing?

The internet – just like other large networks – must be precisely subdivided. The network classes, used until the 1990s and not yet completely gone from the scene, were far too inflexible for the requirements of the digital world. CIDR can help: With classless inter-domain routing, it’s possible to create effective subnets and routes. We explain how this works.

What is a root server? Definition and background

What is a root server? Definition and mechanics

When you call up a website, the entered domain first needs to be turned into an IP address and read out from the browser so that the page can finally appear in the browser. This process is known as name resolution. Here, the root name server or (DNS) root server in the domain name system plays a key role. But what is a root server? And what exactly goes on when they receive requests for...

Hosts File

What is the hosts file and how do you edit it?

The hosts file used to resolve website names so that certain IP addresses could be accessed. The method was largely replaced by the DNS (domain name system). However, the hosts file is still indispensable for local networks. In addition, certain rules can be set for websites e.g. to block them. We show you where you can find and edit the hosts file in your operating system.

ASCII-Codes | Overview of all characters on the ASCII table

ASCII - American Standard Code for Information Interchange

Every day we work with text on PCs, smartphones, tablets and other computer equipment using our keyboards. We expect letters, numbers, and characters to appear on the monitor before us. The fact is that there is a decades-old coding system behind this everyday function. Since the 1960s, ASCII has determined how computers interpret our input. We have prepared a practical ASCII table to help you...

Server

1&1 IONOS Server Guide: professional tips on configuration and administration

Servers are what make up the physical basis of the internet. Setting up your own professional site, putting products online for sale, or connecting multiple company locations with one another: all of these tasks require the support of high-performance computers. And it doesn’t matter if you purchase hardware resources for your own data center or opt for the flexibility of cloud services: operating a server comes with the challenge of independently configuring and administering hardware components. But don’t worry, there’s a lot of support out there for these tasks. In the Server Guide of 1&1 IONOS’s Digital Guide series, you’ll find regular articles, news, and tutorials on how to operate this indispensable component of today’s IT infrastructure.

Server information for businesses, developers, and tech hobbyists

Packed with practical tips, our guide covers a wide spectrum of topics primarily aimed at mid-sized companies, freelance developers, and tech hobbyists. While some articles, like ‘What is a server?’ or ‘DNS – name resolution online’ cater more to beginners, experts are by no means left hanging; there’s a wide range of detailed texts and tutorials on important tasks like choosing the best operating system, filling security gaps, or getting the best possible performance out of your software and hardware.

What you can expect in the 1&1 IONOS Server Guide

If you take a look, you’ll notice our guide is divided into four different subcategories, each covering a different topic. The ‘KnowHow’ area sets out to familiarize beginners with the basics of operating a server. Details on different server types and how to use them are also laid out here. Tips and tricks on managing server software is found under the keyword, ‘Configuration’. The category, ‘Security’ is all about dealing with potential problems server operators may encounter from online threats. Conventional methods of attack, like viruses, worms, and Trojans, and what you can do to combat them are explained here. And the category, ‘Tools’, provides useful guidance on what resources can help make administering your server a more manageable task.


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