The process can be split is smaller tasks to understand what's going on and do it step by step.
# Create tap for nw
configure_host_tap
# Nat out the tap
configure_host_nat
# boot the vm
boot_vm
# wait for the vm to boot, this should be fast and leave this open in a console
# OPTIONNAL:
# Install dante to use as a socks server.
# https://www.inet.no/dante/
# install_dante
# Configure vm nw
configure_guest_nw
# Check that the vm is indeed using mptcp
check_mptcp
# should print "Yay, you are MPTCP-capable! You can now rest in peace."
# Enable local socks server
run_socks
# alternative without ssh : run_socks dante
# if you use ssh :
# You can now configure firefox to use socks server localhost on port 6666
# if you use dante :
# You can now configure firefox to use socks server 10.66.6.2 on port 6666
# Using firefox, go check http://amiusingmptcp.de/#check should be green
# you should have less overhead with dante because it doesn't tunnel at all
# Firefox will connect straight to the vm
# Once you're done, do some clean up
clean_host_nat
clean_host_tap
Dvlp:
Mptcp with one subflow is kind of sad. Let's configure a second itf.
The first interface configured before is still there and use the default table. Second interface is configured with source routing. The second interface need to be configured in the call to configure_host_source_routing (see bellow)
In the example bellow, I used two interfaces on my laptop. My first interface is a tethering interface that use my smartphone to get out. My second interface is the wifi interface (wlp1s0).
# Same as the first one
configure_host_tap 1
configure_host_nat 1
# Need source routing to get out from the second tap
configure_host_source_routing wlp1s0 # replace itf by your outgoing itf
configure_guest_nw 1
run_socks dante
You can check on http://amiusingmptcp.de the number of subflows, if everything went fine, you should have 2.
Let's see a what's on the "wire".
sudo tcpdump -i wlp1s0 -s 120 -w /tmp/wlan.pcap &
sudo tcpdump -i enp0s20f0u2 -s 120 -w /tmp/tether.pcap &
# Go to http://amiusingmptcp.de for a small speedtest.
sudo killall tcpdump
cd /tmp
mergecap -w all.pcap wlan.pcap tether.pcap
mptcptrace -f all.pcap -s # Output
# MPTCP trace V0.0 alpha : says Hello.
# MPTCP connection 0 with id 1
# Subflow 0 with wscale : 6 7 IPv4 sport 58865 dport 80 saddr 192.168.1.21 daddr 18.194.8.156
# Subflow 1 with wscale : 6 7 IPv4 sport 49694 dport 80 saddr 192.168.42.204 daddr 18.194.8.156
#MPTCP connection 0 with id 2
# Subflow 0 with wscale : 6 7 IPv4 sport 57563 dport 80 saddr 192.168.1.21 daddr 18.194.8.156
# Subflow 1 with wscale : 6 7 IPv4 sport 49696 dport 80 saddr 192.168.42.204 daddr 18.194.8.156
xplot.org s2c_seq_1.xpl # see img bellow
