Security

IP Spoofing: Fundamentals and counter-measures

IP Spoofing: Simple manipulation of data packets by attackers

Sending data over networks is one of the most important and highest utilised functions of the modern computer era. But the structure of the necessary TCP/IP connections makes it all too easy for criminals to intercept data packets along their way and either view or alter their contents. One of the most common methods of attack is IP spoofing, which allows DoS and DDoS attacks, among other things...

Server failure – what to do?

Server failure: risks, consequences, countermeasures

Server failures can be devastating for businesses, especially if central business areas are controlled by IT systems since the longer the server is down, the costlier is it for the company. This can result in loss of sales and in the worst case, the loss of business or customer data. Here we demonstrate the internal and external sources of danger that can lead to server failure, explain the...

What is a rootkit?

What you need to know about rootkits

If you ask the IT community which malware is the most harmful, the answer is typically not viruses, worms or Trojan horses. Experts unanimously agree that rootkits pose much greater problems even to experienced users. The rootkit’s special ability is to conceal other malware and thereby enable cybercriminals to misuse others’ computers for their own criminal activities undetected – such as for bot...

Gain users’ confidence with a privacy policy

Getting a privacy policy for your website

An important part of a website that many operators underestimate is the privacy policy. This notifies the site visitors what information they are disclosing about themselves and what this data will be used for. But what kind of information should this declaration contain and what has changed since the new General Data Protection Regulation law and the Data Protection Act 2018?

TAN procedures

iTAN, mTAN, chipTAN? An overview of all TAN procedures

Security in online banking has always been a cornerstone of the industry – TAN procedures like chipTAN are what make it possible. However, there are also many other variants of this two-factor authentication system that can be used to protect your banking transactions. As they say, a chain is only as strong as its weakest link – and in this case, it’s the user. Find out which TAN procedures are...

Changing an Outlook Password

Outlook: how to change your password for mail accounts, data files, and in the web app

Microsoft Outlook is one of the most popular client solutions for retrieving and managing e-mails. Using the software, multiple e-mail accounts can be easily combined and controlled through one interface. For this purpose, Outlook only needs information about the corresponding mail server and the respective log-in data. If you change these, you only have to adjust them in the client settings. But...

Using SSH keys for your network connection

How to use SSH keys for your network connection

Operating and managing a remote server located in a data centre is often carried out by using a secure network connection provided by the SSH protocol. The necessary registration on the server is preceded by an authentication process. Usually this occurs in the form of the username and password. Alternative methods such as the public key authentication used by SSH, do have their advantages. But...

Web analytics and data privacy

Web analytics: data privacy when creating a profile

Tracking tools can provide website operators with a useful indication on how to adapt an online project to suit a target group. These tools focus on user profiles, which reveal how users find the website, and which content provokes interactions. This information is based on user data, which can be subject to stringent data protection guidelines in some countries within the European Union. Find out...

SMTP-Auth

What is SMTP authentication? Secure e-mail against spam

Is your mail server configured with SMTP AUTH? If not, you should do so as soon as possible. Professional spammers are happy to see every open relay that they can use for the distribution of their junk mail. Such spam is not only hassle for the receiver, but also unnecessarily increases your server traffic and damages your online reputation. This security gap can be closed with the simple ESMTP...

StartTLS

StartTLS

StartTLS initiates encryption of an e-mail based on the TLS protocol. For this purpose, the server is pinged without encryption first of all, and StartTLS support is requested. The encryption method can be used when the answer is positive. StartTLS is handy, as e-mails are encrypted automatically once the method has been accepted. You don't need to contact a dedicated port, StartTLS can simply be...


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