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how to prevent DDoS attacks ?

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  • DownPWundefined

    Glitch effect when refreshing the home page

    Customisation
    17
    14 Votes
    17 Posts
    255 Views
    DownPWundefined

    No problem dude !

    I hope you have a good vacation. Enjoy your loved ones!

  • DownPWundefined

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

    Security
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    0 Votes
    4 Posts
    668 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

    Fixed background to nodebb forum

    Solved Configure
    25
    4 Votes
    25 Posts
    2k Views
    phenomlabundefined

    @Panda said in Fixed background to nodebb forum:

    Chatgpt told me the ::before method.

    Go figure 😛

  • Pandaundefined

    adding some console.log to Nodebb

    Solved Customisation
    4
    1 Votes
    4 Posts
    563 Views
    phenomlabundefined

    @eeeee if you’re using the console, you could try

    node app.js > app.log 2>&1

    This would redirect stdout to a file named app.log and redirect stderr to stdout.

    I’m not sure about standard logging under NodeBB, but there is an error log located at logs/error.log.

    Failing that, you could always stop the NodeBB service then use ./nodebb dev from the console which would then provide debug output.

  • crazycellsundefined

    ineffecient use of space on mobile

    Solved Customisation
    10
    7 Votes
    10 Posts
    671 Views
    crazycellsundefined

    @phenomlab Thanks 🙏

  • DownPWundefined

    [NODEBB] Help for my custom CSS

    Solved Customisation
    193
    38 Votes
    193 Posts
    32k Views
    DownPWundefined

    OMG make sense

    Thanks dude 🙂

  • JACundefined

    Social icon (Nodebb)

    Solved Customisation
    7
    0 Votes
    7 Posts
    1k Views
    JACundefined

    @phenomlab said in Social icon (Nodebb):

    @jac I just tested my theory around using the OG image, and according to the Twitter card validator, it works fine

    73e805e1-997b-41bf-9259-51c5052ca8fc-image.png

    fixed 🙂

  • JACundefined

    Iframely (Nodebb)

    Solved Configure
    40
    4 Votes
    40 Posts
    3k Views
    phenomlabundefined

    @DownPW This is now resolved. The issue was an incorrect URL specified in the Nodebb plugin. I’ve corrected this, and now it works as intended.