Description

Further work from #1821.

• Introduce FAIL2BAN_BLOCKTYPE
  drop => drop packet (send NO reply)
  reject => reject packet (send ICMP unreachable)

• Block IP for all ports now. The old behavior was to block the IP only for the affected port/service. This can be reverted via config/fail2ban-jail.cf

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (non-breaking change that does improve existing functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (README.md or ENVIRONMENT.md or the documentation)
• If necessary I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes