Cyrange : firewall configuration

Jan 28, 2022 by Thibault Debatty | 584 views

cyrange Cyber Range

https://cylab.be/blog/199/cyrange-firewall-configuration

The cyrange Cyber Range is composed of multiple docker containers. After installation, here is how to configure your firewall to allow communication between the different components...

cyrange-architecture.png

First, let's allow SSH, HTTP and HTTPS, and increase firewall logging verbosity:

sudo ufw allow ssh
sudo ufw allow http
sudo ufw allow https
sudo ufw logging medium

Now that SSH is allowed, we can enable the firewall:

sudo ufw enable

First we must find the subnet used by our containers:

docker network inspect cyrange_default | grep Subnet

On my server, the subnet used by the cyrange containers is 172.21.0.0/16. You should adapt the examples below according to your subnet...

As we can see on the Figure above, we must allow communication from cyrange to vboxweb-srv:

sudo ufw allow from 172.21.0.0/16 to any port 18083 proto tcp

We must also allow communication from guacamole to RDP ports:

sudo ufw allow from 172.21.0.0/16 to any port 15000:15999 proto tcp

During the deployment of a VM, cyrange will connect to the VM using ssh (on a port in the range 22000-22999), to configure the guest OS. To allow connections from cyrange to the SSH port used for provisioning:

sudo ufw allow from 172.21.0.0/16 to any port 22000:22999 proto tcp

Now, your firewall configuration should look like this:

sudo ufw status verbose

Status: active
Logging: on (medium)
Default: deny (incoming), allow (outgoing), deny (routed)
New profiles: skip

To                         Action      From
--                         ------      ----
22/tcp                     ALLOW IN    Anywhere                  
80/tcp                     ALLOW IN    Anywhere                  
443/tcp                    ALLOW IN    Anywhere                  
18083/tcp                  ALLOW IN    172.21.0.0/16             
22000:22999/tcp            ALLOW IN    172.21.0.0/16             
15000:15999/tcp            ALLOW IN    172.21.0.0/16             
22/tcp (v6)                ALLOW IN    Anywhere (v6)             
80/tcp (v6)                ALLOW IN    Anywhere (v6)             
443/tcp (v6)               ALLOW IN    Anywhere (v6)

Finally, if you have NOT configured Apache reverse proxy, you will need to open ports 8080 and 8081 to access the web interface:

sudo ufw allow 8080
sudo ufw allow 8081
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