Redirect old-classic browser including IE 11

nginx.conf

worker_processes 1;

events {
    worker_connections 1024;
}

http {
    map $http_user_agent $outdated {
        default                                 0;
        "~MSIE [1-10]\."                        1;
        "~Trident/[5-7]\."                        1;
        "~Mozilla.*Firefox/[1-9]\."             1;
        "~Mozilla.*Firefox/[0-2][0-9]\."        1;
        "~Mozilla.*Firefox/3[0-1]\."            1;
        "~Opera.*Version/[0-9]\."               1;
        "~Opera.*Version/[0-1][0-9]\."          1;
        "~Opera.*Version/2[0-1]\."              1;
        "~AppleWebKit.*Version/[0-6]\..*Safari" 1;
        "~Chrome/[0-9]\."                       1;
        "~Chrome/[0-2][0-9]\."                  1;
        "~Chrome/3[0-3]\."                      1;
    }

    server {
        listen 80;

        location / {
            root   /usr/share/nginx/html;
            index  index.html index.htm;

            if ($outdated = 1) {
                rewrite ^ /outdated.html redirect;
            }
        }

        location = /outdated.html {
            root   /usr/share/nginx/html;
            index  outdated.html;
        }

    }
}

The line

"~MSIE [1-10]\."                        1;

Should be

"~MSIE [0-9]+\."                        1;

I think 1-10 is right. the last number of msie is 10 https://www.whatismybrowser.com/guides/the-latest-user-agent/internet-explorer

Very helpful for me

I think 1-10 is right. the last number of msie is 10 https://www.whatismybrowser.com/guides/the-latest-user-agent/internet-explorer

Yeah maybe, however a regex group is not like a number until another number it is a bunch of ascii characters. So with 1-10 you say you allow the digits 1, 1 and 0 just once, not 1-10 like decimal.