When sending a HTTP request to Apache it might happen that the response is HTTP 400. <!DOCTYPE HTML PUBLIC \”-//IETF//DTD HTML 2.0//EN\”>\n<html><head>\n<title>400 Bad Request</title>\n</head><body>\n<h1>Bad Request</h1>\n<p>Your browser sent a request that this server could not understand.<br />\nSize of a request header field exceeds server limit.</p>\n</body></html>\n” The error message is: Size of Read more…
Problem Apache is configured as a reverse proxy. The proxied backend is accessed via HTTPS. Accessing the proxied URL is resulting in an error message: proxy error. Apache log: AH00898: Error during SSL Handshake with remote server returned by /url Browser: Root cause The apache configuration is erroneous. Apache cannot Read more…
I am using GitLab for private projects. GitLab is run using the Docker image provided by GitLab. I can access my instance from outside via a reverse proxy (Apache). The setup is simple: GitLab Docker container is running on NUC and listens on port 7080 for HTTP connections NUC is Read more…
Issuing an AJAX request is more complex than you might think. Issue When you issue an AJAX request to a server in another domain (CORS), you may get the following error message: Response for preflight does not have HTTP ok status. Problem The server is configured to allow CORS. The Read more…
Configuring a reverse proxy is not an easy task. It involves some trial and error and dealing with unexpected errors. One of those errors is ERR_CONTENT_DECODING_FAILED. The web site won’t load in your browser will show this error message: Error ERR_CONTENT_DECODING_FAILED may show up in your browser when a resource Read more…
Configuring a reverse proxy is not an easy task. It involves some trial and error and dealing with unexpected errors. One of those errors is ERR_CONTENT_DECODING_FAILED. The web site won’t load in your browser and Chrome will show this error message: Error ERR_CONTENT_DECODING_FAILED may show up in your browser when Read more…
In this blog I will show how you can block access to your Apache hosted internet services, forbidding access to a whole country. The access is blocked based on the IP address of a client. In case of a VPN where the user connects to a VPN server in another Read more…
A 5xx error code is returned by a web server when something went wrong: The server was not able to process the request. For a reverse proxy, a common 5xx error message is 503, meaning that the backend server is not reachable. In the technical architecture of my blog site, the Read more…
You should secure your web site using TLS. No, that`s not a typo, it`s TLS and not SSL. SSL is dead and should not be used anymore. Praise TLS. This may sound complicated at first, but it`s not. First step is to deactivate HTTP and activate HTTPS. How to do Read more…
After installing GateOne on my Raspberry Pi 2 Debian system, I can log on to SSH via HTTP and browser. But only from my internal network, as the external accessible port is blocked by Apache. To add GateOne from outside, I either can disable Apache (no, won`t do it) or Read more…