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how to prevent DDoS attacks ?

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  • JACundefined

    Forum customisation

    Customisation
    11
    6 Votes
    11 Posts
    241 Views
    JACundefined

    Thank you Mark, the changes look fantastic!!

  • DownPWundefined

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

    Security
    4
    0 Votes
    4 Posts
    691 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.

  • cagatayundefined

    Nodebb 3.2.0

    Bugs
    20
    2 Votes
    20 Posts
    910 Views
    phenomlabundefined

    @crazycells yes, I’m aware of that. Need to fix

    EDIT- fixed. Caused by the same CSS that is used to absolutely position the “verified” group badge in the posts view. Amended this CSS so that is specifically targets the post stream as below

    li[component="post"] a[href*="/groups/verified"] { position: absolute !important; left: 8px; z-index: 2; margin-top: 1px; border-radius: 999px !important; line-height: 14px; display: block; height: 22px; margin-left: 0px !important; }
  • Pandaundefined

    Difficult to move posts now, on mobile.

    Bugs
    16
    5 Votes
    16 Posts
    766 Views
    phenomlabundefined

    @DownPW Yes, it is. It’s set far too low meaning other elements with a higher preference will sit over the top of it.

  • cagatayundefined

    Top Ranked Forums

    Chitchat
    9
    3 Votes
    9 Posts
    583 Views
    phenomlabundefined

    The real issue here is that most people consider forums to be “dead” in the sense that nobody uses them anymore, and social media groups have taken their place. Their once dominant stance in the 90’s and early 00’s will never be experienced again, but having said that, there are a number of forums that did in fact survive the social media onslaught, and still enjoy a large user base.

    Forums tend to be niche. One that immediately sticks out is Reddit - despite looking like it was designed in the 80s, it still has an enormous user base. Another is Stack Overflow, which needs no introduction. The key to any forum is the content it offers, and the more people whom contribute in terms of posting , the more popular and widely respected it becomes as a reliable source of information.

    Forums are still intensely popular with gamers, alongside those that offer tips on hacking etc.

  • Salaundefined

    Fresher in Nodebb install

    General
    24
    15 Votes
    24 Posts
    2k Views
    phenomlabundefined

    @Hari I’ve been reading a lot about APO. Looks impressive.

  • Madchatthewundefined

    Link vs Refresh

    Solved Customisation
    20
    8 Votes
    20 Posts
    1k Views
    phenomlabundefined

    @pobojmoks Do you see any errors being reported in the console ? At first guess (without seeing the actual code or the site itself), I’d say that this is AJAX callback related

  • DownPWundefined

    [NODEBB] Help for my custom CSS

    Solved Customisation
    199
    39 Votes
    199 Posts
    33k Views
    DownPWundefined

    I will test ASAP

    Many thanks my friend