this post was submitted on 29 Jun 2023
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What Intrusion Detection Systems are you using? (reddthat.com)
submitted 2 years ago by [email protected] to c/[email protected]
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Hey Sysadmin,

I need some ideas around "IDS/IPS".

  • What are people using for passing security audits?
  • What about for AWS / Azure?
  • Can they cover devices on/off prem (work from home, etc)
  • What is a figure that your management team actually approved?
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[–] [email protected] 3 points 2 years ago

Not professional sysadmin. I run my homelab and handles a few servers at work. I don't use IDS. So may be irrelevant.

  • WAF to stop HTTP parameter pollution and request smuggling
  • Fail2ban on SSH and move ssh away from port 22
  • Setup LAN recursive resolver and disallowed outbound raw DNS

For me, a lot more emphasis is on defending the application

  • Setup systemd unit hardening
  • Use Landlock LSM to whitelist directories (modifying source needed). Stops directory traversal and command execution
  • TLS or stunnel between application and database
  • Point DNS to local resolver
  • LD_PRELOAD hardened allocator

I'm currently looking into the Linux port of pledge to further reduce post exploit attack surface. But the project is not mature enough for production, yet.