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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.
  • phenomlabundefined

    NodeBB v3 and Harmony Theme

    Discussion nodebb theme
    22
    13 Votes
    22 Posts
    5k 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
  • Pandaundefined

    Title on homepage of nodebb forum

    Solved Customisation nodebb
    2
    1 Votes
    2 Posts
    1k Views
    phenomlabundefined
    @eveh Welcome board The code you are referring to is custom written as no such functionality exists under NodeBB. However, adding the functionality is relatively trivial. Below are the required steps Navigate to /admin/appearance/customise#custom-header Add the below code to your header, and save once completed <ol id="mainbanner" class="breadcrumb"><li id="addtext">Your Title Goes Here</li></ol> Navigate to /admin/appearance/customise#custom-js and add the below code, then save $(document).ready(function() { $(window).on('action:ajaxify.end', function(data) { // Initialise mainbanner ID, but hide it from view $('#mainbanner').hide(); var pathname = window.location.pathname; if (pathname === "/") { $("#addtext").text("Your Title"); $('#mainbanner').show(); } else {} // If we want to add a title to a sub page, uncomment the below and adjust accordingly //if (pathname === "/yourpath") { //$("#addtext").text("Your Title"); //$('#mainbanner').show(); //} }); }); Navigate to /admin/appearance/customise#custom-css and add the below CSS block .breadcrumb { right: 0; margin-right: auto; text-align: center; background: #0086c4; color: #ffffff; width: 100vw; position: relative; margin-left: -50vw; left: 50%; top: 50px; position: fixed; z-index: 1020; } Note, that you will need to adjust your CSS code to suit your own site / requirements.
  • crazycellsundefined

    ineffecient use of space on mobile

    Solved Customisation nodebb
    10
    2
    7 Votes
    10 Posts
    2k Views
    crazycellsundefined
    @phenomlab Thanks
  • crazycellsundefined

    Recent Cards plugin customization

    Solved Customisation nodebb
    21
    1
    13 Votes
    21 Posts
    7k Views
    phenomlabundefined
    @pobojmoks that’s easily done by modifying the code provided here so that it targets background rather than border In essence, the below should work $(document).ready(function() { $(window).on('action:ajaxify.end', function(data) { $('.recent-card-container').each(function(i) { var dataId = $(this).attr("data-cid"); var color = $('[role="presentation"]', this).css("background-color"); console.log("data-cid " + dataId + " is " + color); $('[data-cid="' + dataId + '"] .recent-card').attr("style", "background-color: " + color); }); }); });
  • pwsincdundefined

    [NodeBB] greeting message

    Solved Customisation css nodebb javascript
    2
    1
    3 Votes
    2 Posts
    1k Views
    phenomlabundefined
    @pwsincd welcome to sudonix, and thanks for the comments. What your looking for is here https://sudonix.com/topic/195/nodebb-welcome-message/3?_=1648295651358
  • phenomlabundefined

    NodeBB slow after DB recovery

    Solved Performance performance nodebb
    1
    5 Votes
    1 Posts
    628 Views
    No one has replied
  • JACundefined

    Nodebb Hashtag plugin

    Solved General
    15
    1 Votes
    15 Posts
    3k Views
    phenomlabundefined
    @jac Great ! I’ll close this off.