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  • Madchatthewundefined

    Network Security Monitoring

    Learning
    7
    3 Votes
    7 Posts
    209 Views
    Madchatthewundefined

    @phenomlab I will check those out. Thanks for sharing. I appreciate it!

  • Madchatthewundefined

    Linux Certification

    Linux
    4
    2 Votes
    4 Posts
    117 Views
    phenomlabundefined

    @Madchatthew You might be sorry you asked 🙂 This is the mentoring category below. Presently, it’s unused, but we have a dedicated area for it.

    https://sudonix.org/category/8/mentoring

    Other services

    https://sudonix.org/services

  • DownPWundefined

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

    Security
    4
    0 Votes
    4 Posts
    696 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.

  • phenomlabundefined

    Killing Linux Zombie Processes

    Tips
    3
    2 Votes
    3 Posts
    374 Views
    phenomlabundefined

    @DownPW odd indeed. Looks like it’s spawning, immediately dying, then spawning again.

  • Madchatthewundefined

    Environment Variables

    Solved Linux
    8
    1 Votes
    8 Posts
    690 Views
    phenomlabundefined

    @madchatthew great you got this to work ! Thanks for the update.

  • Ash3Tundefined

    SASL LOGIN authentication failed: generic failure

    Moved Solved Linux
    5
    0 Votes
    5 Posts
    1k Views
    phenomlabundefined

    @Ash3T I’m going to mark this post as solved as I’ve not heard from you in a while. Let me know if this isn’t the case and you need more help.

  • Hariundefined

    help me configuring cron job for fof/sitemap - flarum

    Solved Configure
    36
    18 Votes
    36 Posts
    2k Views
    DownPWundefined

    you are too fast 😉

  • JACundefined

    Advantages and disadvantages of changing to Ubuntu?

    Linux
    28
    2 Votes
    28 Posts
    3k Views
    JACundefined

    @phenomlab said in Advantages and disadvantages of changing to Ubuntu?:

    @jac Yeah, I wouldn’t just leap into it unless you have a valid reason (such as the laptop no longer working and needing to be reinstalled). Probably better the devil you know currently.

    Absolutely mate, and generally as discussed that is the only time I have changed over to Ubuntu once the laptop has got slower.

    For now I will carry on with Windows, purchase the VPN & BitDefender in later October / early November and then see how all that runs for a few more months 👍🏻.