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how to prevent DDoS attacks ?

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  • DownPWundefined

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

    Security security server kernel ddos iptables
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    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

    SEO and Nodebb

    Performance nodebb seo
    2
    2 Votes
    2 Posts
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    phenomlabundefined
    @Panda It’s the best it’s ever been to be honest. I’ve used a myriad of systems in the past - most notably, WordPress, and then Flarum (which for SEO, was absolutely dire - they never even had SEO out of the box, and relied on a third party extension to do it), and NodeBB easily fares the best - see below example https://www.google.com/search?q=site%3Asudonix.org&oq=site%3Asudonix.org&aqs=chrome..69i57j69i60j69i58j69i60l2.9039j0j3&sourceid=chrome&ie=UTF-8#ip=1 However, this was not without significant effort on my part once I’d migrated from COM to ORG - see below posts https://community.nodebb.org/topic/17286/google-crawl-error-after-site-migration/17?_=1688461250365 And also https://support.google.com/webmasters/thread/221027803?hl=en&msgid=221464164 It was painful to say the least - as it turns out, there was an issue in NodeBB core that prevented spiders from getting to content, which as far as I understand, is now fixed. SEO in itself is a dark art - a black box that nobody really fully understands, and it’s essentially going to boil down to one thing - “content”. Google’s algorithm for indexing has also changed dramatically over the years. They only now crawl content that has value, so if it believes that your site has nothing to offer, it will simply skip it.
  • Pandaundefined

    Composer Zen icon?

    Solved Configure nodebb
    8
    1
    2 Votes
    8 Posts
    2k 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!
  • Pandaundefined

    Composer options on nodebb

    Solved Configure nodebb
    8
    1
    3 Votes
    8 Posts
    2k Views
    phenomlabundefined
    @Panda You should be able to expose the CSS for these using F12 to get into console [image: 1686833368846-3591518c-e3a3-4ada-a43c-6b32a5e0359c-image.png] [image: 1686833399483-a2b8ed46-4157-4ff2-85f0-576543380107-image.png] That should then expose the element once selected [image: 1686833431032-89d9c545-a47a-40d1-98f4-80cf3b958e8f-image.png] Here’s the below CSS you need based on the screenshot provided. .composer .formatting-bar .formatting-group li[data-format="picture-o"], .composer .formatting-bar .formatting-group li[data-format="spoiler"] { display: none; }
  • phenomlabundefined

    NodeBB v3 and Harmony Theme

    Discussion nodebb theme
    22
    13 Votes
    22 Posts
    9k Views
    phenomlabundefined
    Been playing with the user profile page this afternoon. Thought I’d post a video as I’m really pleased with how this came out profile-screen-capture.webm
  • DownPWundefined

    [NODEBB] Help for my custom CSS

    Solved Customisation nodebb css bugfix
    257
    49 Votes
    257 Posts
    131k Views
    phenomlabundefined
    @cagatay sorry for late response. This looks too be one of the widgets, and I’m wondering if you have custom code that targets this. Had this recently happened after an upgrade or other changes?
  • DownPWundefined

    [NodeBB] Import custom Font

    Solved Customisation custom fonts nodebb css
    12
    3 Votes
    12 Posts
    4k Views
    phenomlabundefined
    @cagatay you’ll need to define this in the body tag (or another element if you want greater or more granular targets) - for example body { font-family: "Poppins"; font-size: 16px; } Essentially, you use the font-size CSS directive.
  • RiekMediaundefined

    NodeBB Design help

    Solved Customisation
    8
    3
    2 Votes
    8 Posts
    3k Views
    phenomlabundefined
    @riekmedia I’ve applied some new CSS to your site. Can you reload the page and try again ? For the record, this is what I added #footer { background: #2d343e; border-top: 4px solid #2d343e; font-size: 0.9em; margin-top: 70px; padding: 80px 0 0; position: relative; clear: both; bottom: 0; left: 0; right: 0; z-index: 1000; margin-left: -15px; margin-right: -338px; } The /categories page seems a bit messed up, so looking at that currently EDIT - issued some override CSS in the CATEGORIES widget <!--- CSS fix for overspill on /categories page - DO NOT DELETE --> <style> #footer { margin-right: -45px; } </style> That should resolve the /categories issue.