Guacozy can be used with multiple guacd servers, which is convenient when you have isolated environments, where you place guacd inside and only allow guacozy >> guacd in firewall.
This way you don't have to create multiple rules guacozy >> servers
Later you add guacd server in Administration and refer to it when specifying a Connection
Docker
To start additional guacd you can use docker
docker run --restart always -p 4822:4822 guacamole/guacd
CentOS
Or if you are on CentOS 7 you can use epel-release
yum install epel-release
yum install guacd
# Enable guacd to listen on all (or specify desired) interfaces
# By defaut guacd listens on 127.0.0.1
echo "OPTS='-l 4822 -b 0.0.0.0'" >> /etc/sysconfig/guacd
# Enable/start
systemctl enable --now guacd
# Check status
systemctl status guacd
# Check that guacd is listening
netstat -pteln | grep guacd
Build from sources
If you feel adventurous, you can build guacamole from sources and use guacd from build.
Follow official documentation here