(mptcp not working) using 3G and 4G as the only available interfaces

[AnsEMU]

Hello
i have the latest mptcp vision 89.5 followed all the steps.
Doing this test with only 2 interfaces from the same company.
-connecting to 3G as wireless from my mobile and 4G as a USB modem.
no Ethernet interface due to firewall sittings of our university (NAT or middleboxes)

previous test :
We tried using ethernet and 3G or ethernet and 4G and they worked except that the use of on command is not working for ethernet interface!!! we can off it but we can not on it with the command, but it works perfectly for 3G and 4G.

Any ideas ??!

[obonaventure]

Hello

i have the latest mptcp vision 89.5 followed all the steps.
Doing this test with only 2 interfaces from the same company.
-connecting to 3G as wireless from my mobile and 4G as a USB modem.
no Ethernet interface due to firewall sittings of our university (NAT or
middleboxes)

Again, check that MPTCP works over a single interface to
multipath-tcp.org by opening one connection from your mptcp-enabled host
to the multipath-tcp.org server. Check that the SYN segment contains the
MP_CAPABLE option and that the SYN+ACK also contains it

[AnsEMU]

thanks but how shall i do that ?

[AnsEMU]

this the results of using tracebox, with only 3G(1 interface) :
root@ENES:/home/enes# tracebox -n -p IP/TCP/MSS/MPCAPABLE/WSCALE multipath-tcp.org
tracebox to 130.104.230.45 (multipath-tcp.org): 64 hops max
1: 172.20.10.1 TCP::CheckSum IP::Flags IP::CheckSum TCPOptionMaxSegSize::MaxSegSize
2: *
3: *
4: *
5: 130.104.230.45 TCP::SrcPort TCP::DstPort TCP::SeqNumber TCP::AckNumber TCP::DataOffset TCP::Flags TCP::WindowsSize TCP::CheckSum IP::TotalLength IP::Identification IP::Flags IP::TTL IP::CheckSum IP::SourceIP IP::DestinationIP TCPOptionMaxSegSize::MaxSegSize -TCPOptionMPTCPCapable TCPOptionWindowScale::Shift

[obonaventure]

On 07/06/15 16:05, AnsEMU wrote:

this the results of using tracebox, with only 3G(1 interface) :
root@ENES:/home/enes# tracebox -n -p IP/TCP/MSS/MPCAPABLE/WSCALE
multipath-tcp.org
tracebox to 130.104.230.45 (multipath-tcp.org): 64 hops max
1: 172.20.10.1 TCP::CheckSum IP::Flags IP::CheckSum
TCPOptionMaxSegSize::MaxSegSize
2: *
3: *
4: *
5: 130.104.230.45 TCP::SrcPort TCP::DstPort TCP::SeqNumber
TCP::AckNumber TCP::DataOffset TCP::Flags TCP::WindowsSize TCP::CheckSum
IP::TotalLength IP::Identification IP::Flags IP::TTL IP::CheckSum
IP::SourceIP IP::DestinationIP TCPOptionMaxSegSize::MaxSegSize
-TCPOptionMPTCPCapable TCPOptionWindowScale::Shift

The last line indicates that the MP_CAPABLE option has been removed
before hop 5. There seems to be a proxy in this cellular network

OB

[AnsEMU]

but previously we test it with university Ethernet !! and it was working !!

previous test :
We tried using ethernet and 3G or ethernet and 4G and they worked except that the use of on command is not working for ethernet interface!!! we can off it but we can not on it with the command, but it works perfectly for 3G and 4G.

[obonaventure]

On 07/06/15 16:23, AnsEMU wrote:

but previously we test it with university Ethernet !! and it was working !!

previous test :
We tried using ethernet and 3G or ethernet and 4G and they worked except
that the use of on command is not working for ethernet interface!!! we
can off it but we can not on it with the command, but it works perfectly
for 3G and 4G.

try to follow the procedure described here :

http://blog.multipath-tcp.org/blog/html/2014/10/30/testing_multipath_tcp.html?highlight=discard

OB

[AnsEMU]

here is what i did :
in separate terminals, one for :
root@ENES:/home/enes# telnet discard.multipath-tcp.org 9
Trying 37.187.114.89...
Connected to test1.multipath-tcp.org.
Escape character is '^]'.
HTTP multipath-tcp.org
HTTP multipath-tcp.org

and the other for :
root@ENES:/home/enes# tcpdump -n -i any port 9
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on any, link-type LINUX_SLL (Linux cooked), capture size 65535 bytes

19:01:31.842338 IP 172.20.10.4.41893 > 37.187.114.89.9: Flags [P.], seq 35:59, ack 1, win 229, options [nop,nop,TS val 1565525 ecr 720761943], length 24
19:01:32.346276 IP 37.187.114.89.9 > 172.20.10.4.41893: Flags [.], ack 59, win 227, options [nop,nop,TS val 720786117 ecr 1565525], length 0
19:01:41.082890 IP 172.20.10.4.41893 > 37.187.114.89.9: Flags [P.], seq 59:83, ack 1, win 229, options [nop,nop,TS val 1567835 ecr 720786117], length 24
19:01:41.562429 IP 37.187.114.89.9 > 172.20.10.4.41893: Flags [.], ack 83, win 227, options [nop,nop,TS val 720788416 ecr 1567835], length 0

[AnsEMU]

no mptcp option !!!! OMG
what shall i do to make it possible ?

[cruzzer]

Hi AnsEMU

I've done similar tests and I would recommend trying a different provider. I was using two mobile providers and one would not allow the MPTCP flag.

regards

[cpaasch]

Closing, as there seems to be a middlebox on this network.