Dnsmasq TestNetwork
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Add a bridge on host for private network communications
ip link add name j type bridge ip link set j up
lxc profile copy default jclients # Then edit eth0 like below
config: {}
description: Test j dhcp clients
devices:
eth0:
nictype: bridged
parent: j
type: nic
root:
path: /
pool: dir
type: disk
name: jclients
lxc profile copy default jfw # Then edit to add eth1 like below
config: {}
description: Test j firewall with 2 nics
devices:
eth0:
nictype: bridged
parent: lxdbr0
type: nic
eth1:
nictype: bridged
parent: j
type: nic
root:
path: /
pool: dir
type: disk
name: jfw
Create containers
lxc launch ubuntu:20.04 jfw -p jfw lxc launch ubuntu:20.04 jclient1 -p jclients
Disable resolved
sudo systemctl disable systemd-resolved.service sudo systemctl stop systemd-resolved rm /etc/resolv.conf echo "nameserver <mynamserver>" > /etc/resolv.conf
/etc/netplan/50-cloud-init.yaml
network:
version: 2
ethernets:
eth0:
dhcp4: true
eth1:
dhcp4: no
dhcp6: true
addresses: [ 192.168.200.1/24 ]
apt install dnsmasq
/etc/dnsmasq.conf
dhcp-option=15,"test.uvoo.io" domain=test.uvoo.io cache-size=10000 # df 150 except-interface=eth0 bind-interfaces expand-hosts dns-forward-max=1100 dhcp-option=3,0.0.0.0 dhcp-option=6,0.0.0.0 dhcp-range=eth1,192.168.200.100,192.168.200.200,12h # You don't need to specify interface as it should pick it up from int ip dhcp-host=74:46:a0:92:5a:76,192.168.200.11 # lxd eno1 address=/jclientstatic.uvoo.io/192.168.200.11 address=/host1.jtest.io/192.168.200.12 ptr-record=12.200.168.192.in-addr.arpa.,"host1.jtest.io"
dnsmasq --test
restart service
systemclt restart dnsmasq
Sniff traffic if wanted
sudo tcpdump -nnpli j
Alternate container create/apply
lxc init ubuntu:20.04 jfw lxc init ubuntu:20.04 jclient1 lxc profile apply jfw jfw lxc profile apply jclient1 jclients
Start containers
lxc start jfw lxc start jclient1