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About

n2n is is a Layer two Peer-to-Peer VPN created by the ntop team with very good NAT-friendly support. n2n-docker is a docker wrapping of it.

Diagram

Howto - start supernode

// foreground mode
docker run --privileged --net=host -p 53/udp --rm -ti pahud/n2n-docker \
supernode -l 53 -f

// daemon mode
docker run -d --privileged --net=host -p 53/udp --name n2n_supernode pahud/n2n-docker supernode -l 53 -f

Howto - start edge

// foreground mode
docker run --privileged --net=host --rm -ti pahud/n2n-docker \
edge -d n2n0 -a 10.9.9.1 -c mypbxnet -k mypass -l <supernode_host>:<port> -f

// daemon mode
docker run -d --privileged --net=host --name n2n_edge pahud/n2n-docker edge -d n2n0 -a 10.9.9.1 -c mypbxnet -k mypass -l <supernode_host>:<port> -f

Examples

building n2n network for GCP(Google Cloud Platform), AWS and Aliyun

make sure GCP networks->Firewall rules has up:53 open to 0.0.0.0/0 (you may specify some source IP addresses later)

create supernode and 1st edge in GCP

// create supernode in GCP
docker run -d --privileged --name=n2n_supernode --net=host -p 53/udp pahud/n2n-docker supernode -l 53 -f

// create 1st edge in the same host with supernode
docker run -d --privileged --name=n2n_edge --net=host pahud/n2n-docker  edge -d n2n0 -a 10.9.9.1 -c mypbxnet -k mypass -l <my_public_ip_address>:53 -f

you should see this with docker ps in the GCP supernode

# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
7a0a2d6f3635        pahud/n2n-docker    "edge -d n2n0 -a 10.9"   5 seconds ago       Up 5 seconds                            n2n_edge01
39ee2caa461f        pahud/n2n-docker    "supernode -l 53 -f"     25 seconds ago      Up 25 seconds                           n2n_supernode

and you may ping yourself

# ping 10.9.9.1
PING 10.9.9.1 (10.9.9.1) 56(84) bytes of data.
64 bytes from 10.9.9.1: icmp_seq=1 ttl=64 time=0.043 ms
64 bytes from 10.9.9.1: icmp_seq=2 ttl=64 time=0.055 ms
64 bytes from 10.9.9.1: icmp_seq=3 ttl=64 time=0.046 ms

and even telnet tcp:22 to see the SSH prompt like this

# telnet 10.9.9.1 22
Trying 10.9.9.1...
Connected to 10.9.9.1.
Escape character is '^]'.
SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.7
(press Ctrl-]<enter> and q<enter> to quit)

create 2nd edge in AWS

docker run -d --privileged -name=n2n_edge --net=host  pahud/n2n-docker  edge -d n2n0 -a 10.9.9.2 -c mypbxnet -k mypass -l <public_ip_of_supernode>:53 -f
  • please note we specify 10.9.9.2 as the n2n private IP in the 2nd edge
  • make sure you specify the same -c and -k parameters just like 1st edge in GCP

then you can ping yourself like this

# ping 10.9.9.2PING 10.9.9.2 (10.9.9.2) 56(84) bytes of data.
64 bytes from 10.9.9.2: icmp_seq=1 ttl=255 time=0.035 ms
64 bytes from 10.9.9.2: icmp_seq=2 ttl=255 time=0.032 ms

and now ping the 1st edge like this

# ping 10.9.9.1
PING 10.9.9.1 (10.9.9.1) 56(84) bytes of data.
64 bytes from 10.9.9.1: icmp_seq=1 ttl=64 time=72.1 ms
64 bytes from 10.9.9.1: icmp_seq=2 ttl=64 time=35.4 ms
64 bytes from 10.9.9.1: icmp_seq=3 ttl=64 time=35.4 ms

try telnet SSH port on the 1st edge to see SSH prompt

# telnet 10.9.9.1 22
Trying 10.9.9.1...
Connected to 10.9.9.1.
Escape character is '^]'.
SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.7

create 3rd edge in Aliyun

docker run -d --privileged  -name=n2n_edge --net=host  pahud/n2n-docker  edge -d n2n0 -a 10.9.9.3 -c mypbxnet -k mypass -l <public_ip_of_supernode>:53 -f

and you will be able to ping 10.9.9.1 and 10.9.9.2 from AliYun instance.

Finally, you have a n2n network among GCP(10.9.9.1), AWS(10.9.9.2) and Aliyun(10.9.9.3)

It is also possible to route traffic through n2n to GCP out but may require some iptables rules. Let me know if you have made it.