Security & Troubleshooting

• What types of two-factor authentication are available, and how do I enable them? We offer you the option to choose from a range of solutions in the field of two-factor authentication (also known as two-step, two-way authentication or 2FA - Two-Factor Auth). It is important to note that, depending on…
• Web Application Firewall (WAF) - Protection, Functionality and Customisation What is a Web Application Firewall (WAF) and what are its benefits? A Web Application Firewall (WAF) is a specialised type of firewall designed to protect your web applications from various types of…
• Server unavailable / IP block What happens if my IP address is blocked on your server? A user’s IP address may occasionally be temporarily blocked as a result of various security measures. Should this happen, all web pages on…
• Threat Protection - WAAP, DDoS & DNS Protection An overview of our threat protection At SpeedIT Solutions, our aim is to strengthen cyber security across Europe. That is why we offer our comprehensive threat protection not only to our hosting customers, but also to users…
• ModSecurity - Your shield against cyber attacks ModSecurity - Your shield against cyber attacks What is ModSecurity? ModSecurity is what is known as a web application firewall - or WAF for short. Think of this technology as a highly skilled bouncer for your website:…
• Setting up directory protection with .htaccess What is directory protection? Directory protection (also known as .htaccess protection or HTTP authentication) protects certain areas of your website with a username and password. When you access a protected…
• HTTP status codes at a glance: what do 301, 403, 404, 500 and co. mean? Every response from a web server carries a three-digit status code. Here you will find the most important codes at a glance - with links to detailed guides on causes and solutions.
• HTTP status code 301 Moved Permanently: meaning and use Status code 301 stands for a permanent redirect. Find out when to use it, how to set it up with .htaccess and what to keep in mind for your ranking.
• HTTP status code 401 Unauthorized: causes and solutions Status code 401 means that the requested page requires authentication. Find out the most common causes and how to fix the error as a visitor or site operator.
• HTTP status code 403 Forbidden: causes and solutions Status code 403 means that the server refuses access to a page. Find out the most common causes and how to fix the error as a visitor or site operator.
• HTTP status code 404 Not Found: causes and solutions Status code 404 means that the requested page was not found. Find out the most common causes and how to find and fix 404 errors on your website.
• HTTP status code 410 Gone: removing pages permanently Status code 410 states that a page has been removed deliberately and permanently. Find out when to use it and how to set it up.
• HTTP status code 429 Too Many Requests: causes and solutions Status code 429 means that too many requests were made in a short time. Find out where the limit comes from and how to deal with it.
• HTTP status code 500 Internal Server Error: causes and solutions What does the 500 Internal Server Error mean? HTTP status code 500 (Internal Server Error) is a general error message from the web server. It indicates that an unexpected problem has occurred whilst processing a request…
• HTTP status code 502 Bad Gateway: causes and solutions Status code 502 means that a server acting as an intermediary received an invalid response from the actual application server. Find out the causes and solutions.
• HTTP status code 503 Service Unavailable: causes and solutions Status code 503 means that a website is temporarily unavailable - for example due to maintenance or overload. Find out the causes and solutions.
• HTTP status code 504 Gateway Timeout: causes and solutions Status code 504 means that a server waited too long for the application server's response. Find out how to identify and speed up slow processes.
• Fixing the Outlook error message ‘Destination principal name is incorrect’ If Outlook displays the message ‘Destination principal name is incorrect’ when you open the programme or set up a mailbox, the solution is relatively straightforward. The problem with the incorrect destination principal name is often caused by a…
• Error message: "Option FollowSymlinks not allowed here" When hosting your website, you may come across the error message ‘Option FollowSymlinks not allowed here’. This problem often occurs when changes are made to the .htaccess file or when using a ready-made…
• ShieldCache at a glance: firewall and cache in front of your website ShieldCache sits in front of your existing website as a reverse proxy: requests first pass through blocklists, access rules, firewall and cache, and only then reach your server. Here you can see how this works and how the customer area is structured.
• Setting up ShieldCache: add a site, verify your domain and switch DNS Step by step to a protected website: add a site, verify the domain with a TXT record, enter the origin, apply and only then switch the DNS records - so there is no interruption.
• Setting up the origin server: TLS, host header, further origins and visitor IP The origin is the server your website runs on. Here you will learn how ShieldCache connects to it, how to achieve failover with further origins and how your application receives the real visitor IP.
• Configuring the cache: rules, templates, file types and clearing the cache The HTTP cache answers recurring requests directly and takes load off your server. Here is how to configure cache duration, HTML cache, paths and cookies, use the templates for your CMS and clear the cache selectively.
• Path rules in ShieldCache: configure API and WebSocket correctly With path rules, ShieldCache forwards individual paths to your own servers, for example /api/ to an API server and /ws/ to a WebSocket service. A separate proxy on your server is no longer needed. Configure target, port, encryption and choose whether to remove the path prefix.
• Optimisation: HTTP/2, HTTP/3, compression, HSTS and security headers Which protocols visitors use to reach your website, whether ShieldCache compresses responses and how HSTS and the security headers work together.
• ShieldCache in front of container hosting: origin, IP filter and allowing the proxy How to put ShieldCache in front of your own container: read the origin in the Reachability tab, take it over into ShieldCache with one click and allow the proxy in the IP filter of the container.
• Firewall (WAF): mode, check level, categories, exceptions and WAF log The Web Application Firewall checks every request against the OWASP Core Rule Set. Here is how to start without false positives, create exceptions per path and use the reference on an error page to find out which rule was triggered.
• Access rules: IP rules, countries, network operators, rate limits and captcha check Allow or block addresses, filter by country and network operator, limit requests per path and let visitors solve a captcha instead of being blocked.
• Access protection: protect areas with a password or IP allow rule Test environment, admin area or internal page: with access protection you open the whole site or individual paths only to certain IP addresses, require a login or combine both.
• Content Security Policy and custom headers with ShieldCache Specify from which sources browsers may load scripts, styles and images for your site, check reported violations and set or remove custom headers - without adapting your server.
• Understanding statistics and logs in ShieldCache How many requests came in, how many of them were served from the cache, what was blocked and how much load was taken off your server? Here is how to read key figures, traffic, block and WAF logs - and how long the data is stored.
• Versions, tasks, operating mode and custom error pages Every apply becomes a version that you can restore. Also: track tasks on the proxy, switch the site to pass-through or maintenance and design your own error pages in the Enterprise plan.
• ShieldCache in practice: WordPress, online shops and apps with WebSockets Proven settings for typical websites: WordPress, online shops with WooCommerce or Shopware and applications with WebSockets such as SignalR or Blazor Server.
• ShieldCache: frequently asked questions and troubleshooting 502 or 504, missing certificate, TXT record not found, captcha keeps appearing or a visitor reports a 403 with a reference - here you will find the causes and solutions.

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