slide of multipath tcp

1. Multipath TCP
& practical usage
multipath-tcp.org

2. Outline
- Overview
- Practical usage
- Building gateway box
- Gateway component

3. Overview
- MPTCP is a set of extensions to regular TCP.
- TCP restricted to only single path.
- MPTCP utilize all of the available path.
- more info: http://tools.ietf.org/html/rfc6824

4. How it work
splitting bandwidth throughout available uplink
3 possible path

5. Packet comparison

6. Practical usage
- MPTCP is using as the main protocol only
between MPTCP enabled client.
- What if we want to utilizing the protocol for
end user?

7. Practical usage
Introducing
shadowsocks + redsocks

8. shadowsocks
- A lighting fast SOCKS5 proxy.
- Can encrypt the connection using various
encryption.
- This will be used on the internet endpoint.

9. redsocks
- A transparent SOCKS/HTTPS proxy
redirector.
- Redirecting any connection out through
SOCKS/HTTPS proxy.
- iptables/pf/ipfw supported.
- This will be used as a redirector through
shadowsocks server.

10. Internet Diagram

11. All possible path
- Gateway <--> True ADSL <--> Softlayer SG
- Gateway <--> 3BB Fiber <--> Softlayer SG
- Gateway <--> True ADSL <--> CAT (TH content)
- Gateway <--> 3BB Fiber <--> CAT (TH content)
- Gateway <--> True ADSL <--> CAT VPN <--> Softlayer SG
- Gateway <--> 3BB Fiber <--> CAT VPN <--> Softlayer SG
6 possible paths

12. Service Workflow
- client send packet to gateway.
- gateway created MPTCP packet and
redsocks will redirect the packet through all
possible path.

13. Building gateway box
- Any linux distro will do the trick.
- But Ubuntu/Debian is highly recommend.
- more info on setting up: http://multipath-
tcp.org/pmwiki.php/Users/HowToInstallMPT
CP?

14. Building gateway box
- Current setup:
- Ubuntu 14.04.2 LTS
- 3.14.0 MPTCP kernel
- Webmin panel for user configuration
- https://192.168.1.61:10000/

15. Gateway component
- Savage from the office.
- Pretty good spec. Core i5-2400, 4gb ram.
- Old 2tb harddisk.
- Only have 1 ethernet port onboard. will need
2 more.

16. The End
Thank you for listening!
Credit: http://multipath-tcp.org
http://darkk.net.ru/redsocks/
http://shadowsocks.org
http://www.cisco.com/c/en/us/support/docs/ip/transmission-control-protocol-tcp/116519-technote-mptcp-00.html
http://dtbaker.net/random-linux-posts/redirect-all-traffic-through-transparent-socks5-proxy-in-linux/
http://www.sajalkayan.com/post/fun-with-mptcp.html