Security   Security – Create self signed SAN certificate with OpenSSL

This post explains how to generate self signed certificates with SAN – Subject Alternative Names using openssl. It is a common but not very funny task, only a minute is needed when using this method.

The example below generates a certificate with two SubAltNames: and

Create openssl configuration file

Create configuration file for openssh (In a Linux … Read more

Apache   Apache – “Size of a request header field exceeds server limit”


When trying to access to one of my published websites, the browser shows the following error:

Your browser sent a request that this server could not understand.
Size of a request header field exceeds server limit.

Apache - Size of a request header field exceeds server limit

Searching on the Apache debug error traces took me to this error line:

[Thu Jul 14 11:50:18 2016] [error] [client] request failed: 
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Apache   Escaping characters on Apache rewriting rules

If you use Apache, probably you have used the mod_rewrite and the RewriteRule sentences.

One simple rewriting rule:

RewriteRule ^/cars [L,R]

So, when I try to access to subfolder "cars" of the configured virtual host, the browser will be redirected to

But, what if the product id contains, for example, a character like '%'?Let's try:

RewriteRule ^/cars 
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