Skip to content

how to prevent DDoS attacks ?

Solved Vulnerability
34 2 13.8k 1
  • @phenomlab can I ask your values of these settings?

    Screen%20Shot%202023-11-15%20at%2018.38.00.jpeg

    wrote on last edited by
    #12

    @crazycells I’d leave those as they are and handle this much further upstream (at NGINX or OS level)

  • @crazycells I’d leave those as they are and handle this much further upstream (at NGINX or OS level)

    wrote on last edited by
    #13

    @phenomlab we already have those settings changed before, so it might help if I know the default values… 😊 I guess you have them unchanged? Can I learn those default values?

  • @phenomlab we already have those settings changed before, so it might help if I know the default values… 😊 I guess you have them unchanged? Can I learn those default values?

    wrote on last edited by
    #14

    @crazycells Of course - see below

    81935872-9237-4794-8f01-b5c0a32c7c3b-image.png

  • wrote on last edited by
    #15

    maybe we should switch to aws, it has a shield for ddos protection…

    https://aws.amazon.com/shield/ddos-attack-protection/

    which provider do you think is best against ddos attacks?

  • maybe we should switch to aws, it has a shield for ddos protection…

    https://aws.amazon.com/shield/ddos-attack-protection/

    which provider do you think is best against ddos attacks?

    wrote on last edited by phenomlab
    #16

    @crazycells Hetzner also has excellent DDoS protection, a stateful firewall, and I have a referral link meaning you get credits for free… 🙂

    EDIT: Much of this really depends on where you want your server placed. Hetzner are based in Germany, Helsinki, and now the US 🙂

    https://www.hetzner.com/cloud

  • @crazycells Hetzner also has excellent DDoS protection, a stateful firewall, and I have a referral link meaning you get credits for free… 🙂

    EDIT: Much of this really depends on where you want your server placed. Hetzner are based in Germany, Helsinki, and now the US 🙂

    https://www.hetzner.com/cloud

    wrote on last edited by
    #17

    @phenomlab sure, please send me your link. we were considering aws quite some time, but I will send your link to our developer as well, so he can make decision.

    in general, we were trying to stay away from europe or european products due to strict laws and requirements. our user base is either from the US or from Turkey, so we prefer to decrease the amount of work we do 😄

  • @crazycells Hetzner also has excellent DDoS protection, a stateful firewall, and I have a referral link meaning you get credits for free… 🙂

    EDIT: Much of this really depends on where you want your server placed. Hetzner are based in Germany, Helsinki, and now the US 🙂

    https://www.hetzner.com/cloud

    wrote on last edited by
    #18

    @phenomlab oh I see a link there now, but I believe that is not referral link?

  • @phenomlab sure, please send me your link. we were considering aws quite some time, but I will send your link to our developer as well, so he can make decision.

    in general, we were trying to stay away from europe or european products due to strict laws and requirements. our user base is either from the US or from Turkey, so we prefer to decrease the amount of work we do 😄

    wrote on last edited by phenomlab
    #19

    @crazycells You’d be better placed with Hetzner in the US I think. AWS can get VERY expensive very quickly. My referral link for Hetzner is below.

    I personally use Hetzner and also have a “storage box” with 1Tb of storage for backups located in another datacentre for recovery purposes.

    https://hetzner.cloud/?ref=b2bBQLHF3mEV

  • wrote on last edited by
    #20

    This might also be useful…

    image.png

  • This might also be useful…

    image.png

    wrote on last edited by
    #21

    @phenomlab on a side note, is there any easy way to implement a rule… to allow only two geolocation (countries) but block the access from the rest of the countries?

  • @phenomlab on a side note, is there any easy way to implement a rule… to allow only two geolocation (countries) but block the access from the rest of the countries?

    wrote on last edited by
    #22

    @crazycells yes, but without Cloudflare you’d need to perform more checks to determine traffic origin before you have make a decision as to block or permit.

  • @crazycells yes, but without Cloudflare you’d need to perform more checks to determine traffic origin before you have make a decision as to block or permit.

    wrote on last edited by
    #23

    @phenomlab yes, we are planning to install Cloudflare again…

    We will go with “Pro” version and see how it works, I guess this should help not to have any session errors… Previously, we got many connection problems because of Cloudflare…

  • @phenomlab yes, we are planning to install Cloudflare again…

    We will go with “Pro” version and see how it works, I guess this should help not to have any session errors… Previously, we got many connection problems because of Cloudflare…

    wrote on last edited by
    #24

    @crazycells I wouldn’t be so sure. The pro version of Cloudflare is $20 per month but I don’t think that will resolve the connectivity issues.

    There also the harm that CF causes to SEO if you use their bot fight mode as I mention here

    https://sudonix.org/topic/503/cloudflare-bot-fight-mode-and-google-search

  • @crazycells I wouldn’t be so sure. The pro version of Cloudflare is $20 per month but I don’t think that will resolve the connectivity issues.

    There also the harm that CF causes to SEO if you use their bot fight mode as I mention here

    https://sudonix.org/topic/503/cloudflare-bot-fight-mode-and-google-search

    wrote on last edited by
    #25

    @phenomlab I have a good news. We set up CloudFlare Pro, and did not have connection problems yet.

    As you said, it costs $20/month if you subscribe annually, but we did monthly ($25) since we were not sure if this will work for us. So far everything looks OK. We will also check “Google Search” problem you mentioned as well after we secure our forum. Thanks a lot for this warning!

    Unfortunately, we had no choice about Cloudflare since we were getting more than 1 billion connection request from bots and forum was unusable for several hours two consecutive days…

    Screen Shot 2023-11-15 at 16.49.45.png

    Screen Shot 2023-11-18 at 13.22.28.png

    Screen Shot 2023-11-18 at 13.24.55.png

  • @phenomlab I have a good news. We set up CloudFlare Pro, and did not have connection problems yet.

    As you said, it costs $20/month if you subscribe annually, but we did monthly ($25) since we were not sure if this will work for us. So far everything looks OK. We will also check “Google Search” problem you mentioned as well after we secure our forum. Thanks a lot for this warning!

    Unfortunately, we had no choice about Cloudflare since we were getting more than 1 billion connection request from bots and forum was unusable for several hours two consecutive days…

    Screen Shot 2023-11-15 at 16.49.45.png

    Screen Shot 2023-11-18 at 13.22.28.png

    Screen Shot 2023-11-18 at 13.24.55.png

    wrote on last edited by
    #26

    @crazycells well, of course 1 billion+ requests happened after we installed CF, I do not know how many more we had before installing CF…

  • @phenomlab I have a good news. We set up CloudFlare Pro, and did not have connection problems yet.

    As you said, it costs $20/month if you subscribe annually, but we did monthly ($25) since we were not sure if this will work for us. So far everything looks OK. We will also check “Google Search” problem you mentioned as well after we secure our forum. Thanks a lot for this warning!

    Unfortunately, we had no choice about Cloudflare since we were getting more than 1 billion connection request from bots and forum was unusable for several hours two consecutive days…

    Screen Shot 2023-11-15 at 16.49.45.png

    Screen Shot 2023-11-18 at 13.22.28.png

    Screen Shot 2023-11-18 at 13.24.55.png

    wrote on last edited by
    #27

    @crazycells Good news in the short term, but interested to see if this does impact the SEO of your forum. Do you have Bot Fight Mode enabled in CF?

  • @crazycells Good news in the short term, but interested to see if this does impact the SEO of your forum. Do you have Bot Fight Mode enabled in CF?

    wrote on last edited by crazycells
    #28

    @phenomlab I actually do not know yet, because I have not found these settings on the CF yet…

    Can you please show me how I reach those?

    Screen Shot 2023-11-21 at 16.27.14.png

    and this is the bot page:

    Screen Shot 2023-11-21 at 16.29.47.png

  • @phenomlab I actually do not know yet, because I have not found these settings on the CF yet…

    Can you please show me how I reach those?

    Screen Shot 2023-11-21 at 16.27.14.png

    and this is the bot page:

    Screen Shot 2023-11-21 at 16.29.47.png

    wrote on last edited by
    #29

    @crazycells see the link located at the top right of that screenshot 😂

  • @crazycells see the link located at the top right of that screenshot 😂

    wrote on last edited by
    #30

    @phenomlab lol thanks…

    Mouxy Cotorep GIF

    is it “Verified bots”?

    Screen Shot 2023-11-21 at 16.54.43.png

  • @phenomlab lol thanks…

    Mouxy Cotorep GIF

    is it “Verified bots”?

    Screen Shot 2023-11-21 at 16.54.43.png

    wrote on last edited by
    #31

    @crazycells yes, exactly. You want to allow crawlers such as Google bot etc.


Did this solution help you?
Did you find the suggested solution useful? Support 💗 Sudonix with a coffee ☕
If your organisation needs deeper expertise around infrastructure, security, or technology leadership, learn more about Phenomlab Ltd. Many of the deeper technical guides behind Sudonix are published there.

Related Topics
  • 2 Votes
    1 Posts
    648 Views
    No one has replied
  • CSS code customization for the link preview plugin

    Solved Customisation css nodebb
    6
    2
    3 Votes
    6 Posts
    3k Views
    phenomlab
    @kadir-ay-0 marking as resolved based on https://community.nodebb.org/topic/17109/manual-build-a-night-mode-for-harmony/5 Please do not raise requests in two places - here and the NodeBB forums. All this does is create unnecessary load for both parties.
  • how to hide "moved" badge with CSS?

    Solved Customisation nodebb
    12
    1
    3 Votes
    12 Posts
    4k Views
    phenomlab
    @crazycells ah, I see. That makes sense.
  • Gettin Erors NodeBB

    Solved Configure nodebb eror
    7
    0 Votes
    7 Posts
    2k Views
    cagatay
    @phenomlab no forum is working goods. there is no eror message since yestarday.
  • Post Style View

    Solved Customisation post style sudonix nodebb
    67
    2
    18 Votes
    67 Posts
    36k Views
    DownPW
    @cagatay Just add margin-left on the element like @phenomlab said to you : topic [component="post/parent"] { margin-left: 10px; } [image: aa08c62b-4223-4cba-8c0f-c73d50474c0d-image.png] Maybe @phenomlab have a better way
  • Rotating homepage icons, gifs?

    Solved Configure nodebb
    2
    3 Votes
    2 Posts
    1k Views
    phenomlab
    @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; }
  • 0 Votes
    5 Posts
    2k Views
    phenomlab
    @qwinter this particular site uses the code I wrote if you want to see it in action. It’s a information and intelligence gatherer I designed for collecting various information security articles from around the globe and consolidating them in one place. Essentially, each “post” is in fact generated by the script, and the NodeBB API. https://hostrisk.com/
  • NodeBB Design help

    Solved Customisation
    8
    3
    2 Votes
    8 Posts
    4k Views
    phenomlab
    @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.