Skip to content
Sudonix

how to prevent DDoS attacks ?

Solved Vulnerability
34 2 7.9k 1
Log in to reply

Did this solution help you?
Did you find the suggested solution useful? Support 💗 Sudonix with a coffee ☕
If your organisation needs deeper expertise around infrastructure, security, or technology leadership, learn more about Phenomlab Ltd. Many of the deeper technical guides behind Sudonix are published there.

Related Topics
  • DownPWundefined

    [NodeBB] Focus Mode : simply immersive reading for NodeBB

    Customisation focus mode nodebb javascript css
    1
    2 Votes
    1 Posts
    62 Views
    No one has replied
  • abcabc123undefined

    Please help me, I can't install nodebb

    Locked Solved Customisation nodebb
    7
    5 Votes
    7 Posts
    1k Views
    phenomlabundefined
    Installation completed, verified, and tested. Correct installation methodology is below https://docs.nodebb.org/installing/os/ubuntu/
  • DownPWundefined

    Setting for high load and prevent DDoS (sysctl, iptables, crowdsec or other)

    Security security server kernel ddos iptables
    4
    0 Votes
    4 Posts
    2k Views
    phenomlabundefined
    @DownPW most of this really depends on your desired security model. In all cases with firewalls, less is always more, although it’s never as clear cut as that, and there are always bespoke ports you’ll need to open periodically. Heztner’s DDoS protection is superior, and I know they have invested a lot of time, effort, and money into making it extremely effective. However, if you consider that the largest ever DDoS attack hit Cloudflare at 71m rps (and they were able to deflect it), and each attack can last anywhere between 8-24 hours which really depends on how determined the attacker(s) is/are, you can never be fully prepared - nor can you trace it’s true origin. DDoS attacks by their nature (Distributed Denial of Service) are conducted by large numbers of devices whom have become part of a “bot army” - and in most cases, the owners of these devices are blissfully unaware that they have been attacked and are under command and control from a nefarious resource. Given that the attacks originate from multiple sources, this allows the real attacker to observe from a distance whilst concealing their own identity and origin in the process. If you consider the desired effect of DDoS, it is not an attempt to access ports that are typically closed, but to flood (and eventually overwhelm) the target (such as a website) with millions of requests per second in an attempt to force it offline. Victims of DDoS attacks are often financial services for example, with either extortion or financial gain being the primary objective - in other words, pay for the originator to stop the attack. It’s even possible to get DDoS as a service these days - with a credit card, a few clicks of a mouse and a target IP, you can have your own proxy campaign running in minutes which typically involves “booters” or “stressers” - see below for more https://heimdalsecurity.com/blog/ddos-as-a-service-attacks-what-are-they-and-how-do-they-work @DownPW said in Setting for high load and prevent DDoS (sysctl, iptables, crowdsec or other): in short if you have any advice to give to secure the best. It’s not just about DDos or firewalls. There are a number of vulnerabilities on all systems that if not patched, will expose that same system to exploit. One of my favourite online testers which does a lot more than most basic ones is below https://www.immuniweb.com/websec/ I’d start with the findings reported here and use that to branch outwards.
  • Pandaundefined

    Composer Zen icon?

    Solved Configure nodebb
    8
    1
    2 Votes
    8 Posts
    1k Views
    phenomlabundefined
    @DownPW exactly. Not really a new concept, and in all honesty, not something I’ve ever used. If you consider the need to add links and references, or citations, you’d need to be able to see other parts of the screen!
  • cagatayundefined

    who is read NodeBB

    Customisation read post nodebb
    6
    0 Votes
    6 Posts
    2k Views
    phenomlabundefined
    @cagatay You should ask in the NodeBB forums. Perhaps reference this post https://discuss.flarum.org/d/23066-who-read
  • cagatayundefined

    Podcast Share NodeBB

    Solved Configure podcast nodebb
    15
    4 Votes
    15 Posts
    3k Views
    phenomlabundefined
    @cagatay You could experiment with nodebb-plugin-ns-embed but I expect the x-origin tag on the remote site to prevent playback.
  • cagatayundefined

    How to downgrade plugin version on NodeBB

    Solved Customisation downgrade nodebb
    11
    3 Votes
    11 Posts
    2k Views
    phenomlabundefined
    @cagatay no problems
  • JACundefined

    WordPress & NodeBB

    Solved WordPress
    6
    0 Votes
    6 Posts
    2k Views
    phenomlabundefined
    @jac That won’t matter. You just redirect at nginx or apache level and it’ll work. The generally accepted standard though is to use a subdomain.