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0x10. HTTPS SSL

0-world_wide_web

Configure your domain zone so that the subdomain www points to your load-balancer IP (lb-01). Let’s also add other subdomains to make our life easier, and write a Bash script that will display information about subdomains.

Requirements:

  • Add the subdomain www to your domain, point it to your lb-01 IP (your domain name might be configured with default subdomains, feel free to remove them)
  • Add the subdomain lb-01 to your domain, point it to your lb-01 IP
  • Add the subdomain web-01 to your domain, point it to your web-01 IP
  • Add the subdomain web-02 to your domain, point it to your web-02 IP
  • Your Bash script must accept 2 arguments:
    1. domain:
      • type: string
      • what: domain name to audit
      • mandatory: yes
    2. subdomain:
      • type: string
      • what: specific subdomain to audit
      • mandatory: no
  • Output: The subdomain [SUB_DOMAIN] is a [RECORD_TYPE] record and points to [DESTINATION]
  • When only the parameter domain is provided, display information for its subdomains www, lb-01, web-01 and web-02 - in this specific order
  • When passing domain and subdomain parameters, display information for the specified subdomain
  • Ignore shellcheck case SC2086
  • Must use:
    • awk
    • at least one Bash function
  • You do not need to handle edge cases such as:
    • Empty parameters
    • Nonexistent domain names
    • Nonexistent subdomains

1-haproxy_ssl_termination

“Terminating SSL on HAproxy” means that HAproxy is configured to handle encrypted traffic, unencrypt it and pass it on to its destination.

Create a certificate using certbot and configure HAproxy to accept encrypted traffic for your subdomain www..

Requirements:

  • HAproxy must be listening on port TCP 443
  • HAproxy must be accepting SSL traffic
  • HAproxy must serve encrypted traffic that will return the / of your web server
  • When querying the root of your domain name, the page returned must contain Holberton School
  • Share your HAproxy config as an answer file (/etc/haproxy/haproxy.cfg)

The file 1-haproxy_ssl_termination must be your HAproxy configuration file

Make sure to install HAproxy 1.5 or higher, SSL termination is not available before v1.5.

100-redirect_http_to_https

A good habit is to enforce HTTPS traffic so that no unencrypted traffic is possible. Configure HAproxy to automatically redirect HTTP traffic to HTTPS.

Requirements:

  • This should be transparent to the user
  • HAproxy should return a 301
  • HAproxy should redirect HTTP traffic to HTTPS
  • Share your HAproxy config as an answer file (/etc/haproxy/haproxy.cfg)

The file 100-redirect_http_to_https must be your HAproxy configuration file