Skip to content
Sudonix

sudonix

how to prevent DDoS attacks ?

Solved Vulnerability
Posts 34 Posters 2 Views 2.9k Watching 1
Log in to reply

3/34

17 Nov 2023, 15:42

topic:navigator.unread, 31
Threaded Replies

Related Topics
  • DownPWundefined

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

    Security security server kernel ddos iptables
    34 2 Aug 2023, 13:41
    2 Aug 2023, 13:41
    0 Votes
    4 Posts
    864 Views
    undefined
    @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 nodebb
    34 30 Jul 2023, 11:45
    30 Jul 2023, 11:45
    4 Votes
    25 Posts
    2k Views
    undefined
    @Panda said in Fixed background to nodebb forum: Chatgpt told me the ::before method. Go figure
  • Pandaundefined

    SEO and Nodebb

    Performance nodebb seo
    34 4 Jul 2023, 09:11
    4 Jul 2023, 09:11
    2 Votes
    2 Posts
    400 Views
    undefined
    @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.
  • cagatayundefined

    How to fix size of photos & videos NodeBB

    Solved Customisation nodebb nodebb size
    34 2 Nov 2022, 16:52
    2 Nov 2022, 16:52
    3 Votes
    7 Posts
    768 Views
    undefined
    @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
  • Salaundefined

    Fresher in Nodebb install

    General nodebb
    34 26 Oct 2022, 15:42
    26 Oct 2022, 15:42
    15 Votes
    24 Posts
    3k Views
    undefined
    @Hari I’ve been reading a lot about APO. Looks impressive.
  • Pandaundefined

    Rotating homepage icons, gifs?

    Solved Configure nodebb
    34 17 Oct 2022, 15:25
    17 Oct 2022, 15:25
    3 Votes
    2 Posts
    336 Views
    undefined
    @eveh It’s not a GIF, no. It’s actually a webp file so made much smaller, and uses keyframes to control the rotation on hover. You can easily make your own though The CSS for that is as below @keyframes rotate180 { from { transform: rotate(0deg); } to { transform: rotate(180deg); } } @keyframes rotate0 { from { transform: rotate(180deg); } to { transform: rotate(0deg); } } Your milage may vary on the CSS below, as it’s custom for Sudonix, but this is the class that is used to control the rotate .header .forum-logo, img.forum-logo.head { max-height: 50px; width: auto; height: 30px; margin-top: 9px; max-width: 150px; min-width: 32px; display: inline-block; animation-name: rotate180, rotate0; animation-duration: 1000ms; animation-delay: 0s, 1000ms; animation-iteration-count: 1; animation-timing-function: linear; transition: transform 1000ms ease-in-out; }
  • undefined

    creating topic specific widgets

    Solved Customisation nodebb
    34 14 Feb 2022, 21:41
    14 Feb 2022, 21:41
    10 Votes
    16 Posts
    2k Views
    undefined
    @crazycells said in creating topic specific widgets: Additionally if hide class exists, why are we re-defining it? We’re not 🤭 I misspelled it - it should be hidden
  • JACundefined

    [NodeBB] Creating new user to auto post content

    Solved Customisation
    34 9 Sept 2021, 16:38
    9 Sept 2021, 16:38
    0 Votes
    3 Posts
    981 Views
    JACundefined
    @phenomlab many thanks Mark .