If you are a sysadmin, feel free to enable MPTCP support on NGINX and any other server side services: no impact on “plain” TCP connections because “plain” TCP requests will trigger the creation of a “plain” TCP socket on the server side when being accepted. MPTCP will only be used when requested by the clients, which are usually the ones benefiting from using MPTCP 🔀.

More details here.

NGINX 🌐 1.29.7 mainline version introduces support for Multipath TCP 🔀 🎉

This comes a bit after two NGINX’s forks – freenginx and Angie – with a different approach, but still with the same way to enable it: simply by adding the multipath parameter to the listen instruction, e.g.

  listen <address|port> multipath

More details here.

xfr is a modern IPerf alternative with a live TUI, multi-client server, and QUIC support. Built in Rust 🦀. The last version supports MPTCP 🔀 natively by simply using `xfr --mptcp` on the client side.

https://github.com/lance0/xfr

#xfr #iperf #iperf3 #MPTCP

Questions or ideas linked to MPTCP 🔀 at FOSDEM 🇧🇪? @matttbe is there and available to talk, simply ping him!

#MPTCP #FOSDEM

Did you know you can have MPTCP support with any devices running Android 16? 😯

OK, it is not easily accessible, but using the included Terminal app 🖥️, you can use MPTCP! 🔀

(Android 16 has a Terminal app which runs a full Linux VM with Debian Bookworm and a kernel 6.1 with MPTCP support. Sadly, Google still didn't add full MPTCP support, despite now using kernels supporting it. If you know people who can change that, please contact me 🙂)

Do you use SSH with MPTCP 🔀 for better resilience in mobility use cases or to increase the throughput? Then, feel free to check the new script to pass to ProxyCommand in the SSH config instead of using mptcpize: https://www.mptcp.dev/faq.html#how-to-enable-mptcp-support-with-openssh

Thanks to @shoragan for having shared this script!

(Hopefully the SSH maintainers will allow one of the suggested (1) (2) native MPTCP support at some points!)

#SSH #MPTCP #Linux

"Valkey 9.0.0 released" article from @lwn mentions:

> Notable features of this release include (native) Multipath TCP (MPTCP) support

🎉

https://lwn.net/Articles/1042851/

#Valkey #MPTCP #Linux

New blog post 📰! What happened the last 9 months around MPTCP 🔀, and which new features will be available in the future LTS v6.18 Linux kernel version: https://blog.mptcp.dev/2025/10/16/v6.18-with-many-features.html

- Better load-balancer deployment support on the client side 🔄
- New 'laminar' endpoints for better controlling addresses signalled by a server 📢
- mptcpd: security review and improvements 🔐
- More apps natively supporting MPTCP 🧑‍💻
- Misc.: PM, counters, CI, perf, socket options, adaptive ADD_ADDR timeout and future work. 📈

MPTCP or Multipath TCP is an extension to the standard TCP to allow devices to make use of multiple interfaces at once. See https://mptcp.dev for more details.

Thanks to @nlnet for funding part of this work 🎉

#MPTCP #MultipathTCP #Linux

The MPTCP dev team will be represented by @matttbe at the IETF 123 in Madrid this week. Don't hesitate to join the Hackathon 👩‍💻 and participate to the two suggested extensions at the tcpm session! 📰

#MPTCP #IETF

A 🆕 TCP-in-UDP tool is available, using eBPF 🐝 to translate TCP packets into UDP 🚇 to avoid middleboxes interfering with some TCP extensions like MPTCP 🔀.

Blog post: https://blog.mptcp.dev/2025/07/14/TCP-in-UDP.html

Code and instructions: https://github.com/multipath-tcp/tcp-in-udp

#eBPF #BPF #TCP #MPTCP

The last Traefik versions 2.11.26 and 3.4.2 have MPTCP support enabled by default 🎉

#Traefik is the Cloud Native Application Proxy: https://traefik.io
#MPTCP is short for Multipath TCP, an extension to TCP to make use of multiple interfaces at once to send and receive TCP packets over a single MPTCP connection: https://mptcp.dev

The next version of Valkey (8.2) will natively support MPTCP 🔀, thanks to Zhenwei 🎉 and Valkey maintainers:

- https://www.mptcp.dev/apps.html
- https://github.com/valkey-io/valkey/pulls?q=MPTCP

#valkey #MPTCP #Redis #Linux

A new page has just been added to the MPTCP website to help deploy it behind a stateless L4 load-balancer 🔀
It would be great if CDNs can support MPTCP 😇

https://www.mptcp.dev/load-balancer.html

#MPTCP #Linux #loadbalancer

MPTCP changes for Linux 6.15 have just been added to our ChangeLog section:

v6.15: Single subflow optimisation + prepare PM extension

- Optimise MPTCP performance in single subflow mode by ~29%.
- Expose TCP ULP diagnostic info (MPTCP subflows) to non-admin users.
- PM: a lot of cleanups and preparation work (e.g. new pm_kernel.c file) to allow future extensions
- PM: net.mptcp.path_manager (and net.mptcp.available_path_managers) Sysctl knob deprecates net.mptcp.pm_type
- Misc small optimisations and code coverage

https://github.com/multipath-tcp/mptcp_net-next/wiki#changelog

#MPTCP #Linux #kernel

The new networking features for the future6.15 have been accepted in Linus' tree. At the top, we can find:

- Optimize MPTCP performance in single subflow mode by 29%.

🎉

Thanks Paolo for having worked on that!
https://lore.kernel.org/20250326163652.2730264-1-kuba@kernel.org

There will be a presentation and discussions about #MPTCP at #Netdev 0x19 this afternoon! See you there!

OpenWrt 24.10.0 is available: "Activate kernel support for Multipath TCP on devices with big flash sizes." 🎉

All ready to run a transparent proxy to let all clients connected to the router benefit from multiple paths.

https://openwrt.org/releases/24.10/notes-24.10.0

#OpenWrt #MPTCP

This MPTCP community meetup at #FOSDEM will start in less than 5 minutes and last 1h. Come here, there will be #MPTCP stickers! 🎉

Live from @godevroom 🎉
#MPTCP will be enabled by default on Linux on the server side in the next version!

There will be an official MPTCP community meetup at FOSDEM this year!

No need to have improvised meetings outside in a cold weather anymore, we can meet on Saturday from 17.30 in H.3242. Feel free to come!

https://fosdem.org/2025/schedule/event/fosdem-2025-6750-mptcp-community-meetup-bof/

#MPTCP #FOSDEM #Brussels