Mystery high feaver (ranging from 99 to 103) comes and goes with extreme chills (sometimes)

One of my relatives (old) had this kind of mysterious fever. It used to go away in 3 days, and then used to come back within around 5 days. The first day, fever was high (like 103), then it used to reduce over the next 2 days. The fever was high promenantly at night.

'Modern' medicine and 'specialists' got stuck with lung infection and various tests which gave no results. The blood test results were erratic and inconsistent pointing to a mix of all diseases. This had been going on with 6 months.

Then he though of taking a remedy of alternative medicine based on Indian origin (something related to Yoga). The practitioner said this's a result of food allergy. Apart from giving medications, he a black and whitelist of foods to avoid and prefer.

And that was it ... fever was gone.

Matching encoded URLs using regexp/regular expressions (optionally in fail2ban).

Your regular expression can fail against attackers doing attacks by encoding their URLs; fail2ban will not detect those, neither your regular expression; But you can modify your regexpes to match these encoded URLs also even in mixed form (partly encoded, and partly not); create regular expressions to replace each character with something like -- 

(c|%63|%43)

Here I replace c with the above; this will match c, and it's capital and small form in encoded URLs. In fail2ban you need to replace the % with a %% -- 

(c|%%63|%%43)

So I write .php as -- 

(\.|%%2E)(p|%%70|%%50)(h|%%68|%%48)(p|%%70|%%50)

You may begin the regular expression with (?i) in fail2ban or define it as (?i:<your regexp>) elsewhere to ignore case of the character (so C and c are alike and %2e and %2E is also alike.

To convert URLs to their encoded form I've created a simple script -- 

#! /usr/bin/ruby
# Converts the input string to a regular expression which will match the string either in the URL encoded form or mixed or unencoded form and case insensitively
# First argument is the string.
input = ARGV[0].dup
input.gsub!(/a/,'(a|%61|%41)')
input.gsub!(/b/,'(b|%62|%42)')
input.gsub!(/c/,'(c|%63|%43)')
input.gsub!(/d/,'(d|%64|%44)')
input.gsub!(/e/,'(e|%65|%45)')
input.gsub!(/f/,'(f|%66|%46)')
input.gsub!(/g/,'(g|%67|%47)')
input.gsub!(/h/,'(h|%68|%48)')
input.gsub!(/i/,'(i|%69|%49)')
input.gsub!(/j/,'(j|%6A|%4A)')
input.gsub!(/k/,'(k|%6B|%4B)')
input.gsub!(/l/,'(l|%6C|%4C)')
input.gsub!(/m/,'(m|%6D|%4D)')
input.gsub!(/n/,'(n|%6E|%4E)')
input.gsub!(/o/,'(o|%6F|%4F)')
input.gsub!(/p/,'(p|%70|%50)')
input.gsub!(/q/,'(q|%71|%51)')
input.gsub!(/r/,'(r|%72|%52)')
input.gsub!(/s/,'(s|%73|%53)')
input.gsub!(/t/,'(t|%74|%54)')
input.gsub!(/u/,'(u|%75|%55)')
input.gsub!(/v/,'(v|%76|%56)')
input.gsub!(/w/,'(w|%77|%57)')
input.gsub!(/x/,'(x|%78|%58)')
input.gsub!(/y/,'(y|%79|%59)')
input.gsub!(/z/,'(z|%7A|%5A)')
input.gsub!(/\./,'(\.|%2E)')
input.gsub!(/-/,'(-|%2D)')
puts input

The first argument to this script will be your text input.