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Avoid network traffic jam with BBR

  • From time to time, here or there, we see subjects flourish on an abnormally limited speed in FTP.
    To overcome this kind of slowdown, simply activate the TCP BBR protocol

    Without going into details, this protocol makes it possible to make better use of the bandwidth available during the exchange of TCP packets. Created by Google, you can find more information here.

    Integrated into the Linux Kernel since version 4.9, all you have to do to activate it is to edit the kernel parameters (/etc/sysctl.conf) and add :

    net.ipv4.tcp_congestion_control = bbr
    net.core.default_qdisc = fq

    A TCP command acting in both IPv4 and v6,

    save and load with :

    sudo sysctl -p

    And we go from a restricted FTP speed
    crazy 🙂

    If you are under Proxmox or ESXi, this must be done both on the host and in the VM/CT.

  • DownPWundefined DownPW marked this topic as a regular topic on
  • @DownPW interesting. Does this have any effect on data transfers over SCP

  • 0 Votes
    17 Posts

    @DownPW anytime

  • Ubuntu Upgrade All Packages

    Solved Linux
    3 Votes
    3 Posts

    @phenomlab Upgraded, everything works 🙂

  • what is docker?

    Solved Linux
    1 Votes
    3 Posts

    @Hari sort of, but not in the sense of a full blown system

    In simple terms, Docker is a software platform that simplifies the process of building, running, managing and distributing applications. It does this by virtualizing the operating system of the computer on which it is installed and running.

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    2 Posts

    Just coming back to this thread for review (as I often do), and it looks like Webdock have increased their available offerings - some are extremely powerful, yet very competitive from the pricing perspective.


    10 CPU cores, plus 20Gb RAM? Well worth a look (and the asking price) - there’s also a fixed IP which is hugely beneficial.

    Clearly, this is well beyond what most people will want to spend - it’s more of an example (but interestingly, Sudonix runs on something not too different from the above).

    However, not all that glitters is gold 😕 - just have a walk through the benchmark report I found below and you’ll see a huge difference between Heztner and Webdock

    That being said, the amount of HTTP requests that Webdock handles in relation to Hetzner is superior - @DownPW you might want to have a look at this - there’s a free 24 hour trial… 🙂


  • 1 Votes
    6 Posts

    @Hari not sure from the consumer perspective, but Skype has been all but completely consumed by Microsoft Teams when it comes to business usage.

  • 11 Votes
    26 Posts

    i think we can mark this discussion as solved

    learned how to install virtualmin with NGINX We can easily point the DNS by mentioning server IP at CF a name record learned how to install SSL
  • Is plesk good over virtual min?

    Solved Linux
    4 Votes
    6 Posts

    @phenomlab thank you

  • Environment Variables

    Solved Linux
    1 Votes
    8 Posts

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