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
  • 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

    Why CSS acts different in Desktop?

    Bugs nodebb
    11
    4 Votes
    11 Posts
    2k Views
    phenomlabundefined
    @DownPW I’d have to agree with that.
  • phenomlabundefined

    v3 & Harmony diary / thoughts / code snippets

    Announcements harmony v3.beta1 nodebb
    55
    5
    36 Votes
    55 Posts
    14k Views
    phenomlabundefined
    @DownPW I see why. The code relies on the existence of [component="topic/quickreply/container"] However, this by definition means that the below has to be enabled [image: 1679077966615-aeef638f-4188-489d-a9f2-f3a26dbca9d8-image.png] It will then work [image: 1679077992245-7fb38631-e0f3-46ef-b652-00929d927b13-image.png] For some unknown reason, this is hidden in Harmony, and only shows if you select it. In v2, it seems that the <section> is deleted altogether in Persona if “Quick Reply” is disabled, meaning it won’t fire as it can’t locate that specific component. The downside is that you might not want the quick reply function, but I think it’s a PITA to scroll up to the top of the post just to reply, so I have it on
  • crazycellsundefined

    Custom badges

    Solved Customisation nodebb
    103
    2
    49 Votes
    103 Posts
    30k Views
    DownPWundefined
    Perfect
  • cagatayundefined

    How to fix size of photos & videos NodeBB

    Solved Customisation nodebb nodebb size
    7
    3 Votes
    7 Posts
    2k Views
    phenomlabundefined
    @crazycells pleasure. Using percentages makes much more sense in this case. It’s the same argument with px vs pt vs em with fonts, margins, padding, etc., in the sense that em is generally preferred over px and pt https://stackoverflow.com/questions/609517/why-em-instead-of-px
  • Madchatthewundefined

    Bootstrap Version

    Solved Customisation nodebb bootstrap
    8
    5 Votes
    8 Posts
    2k Views
    Madchatthewundefined
    @phenomlab That will be nice once they have completed that. It will be interesting to see how long that takes. So for now I will use custom css to make it look the way I want. Frameworks just make things a little faster. Thanks @phenomlab
  • RiekMediaundefined

    NodeBB Discord Plugins

    Unsolved Customisation nodebb discord plugin
    7
    0 Votes
    7 Posts
    2k Views
    phenomlabundefined
    @RiekMedia hi. Just following up on this thread (I know it’s old) but was curious to understand if it’s still an issue or not ?