Virtualbox bridged networking on ubuntu host

Installing bridge-utils

sudo apt-get update
sudo apt-get -y install bridge-utils

brctl addbr br0
ip link set dev br0 up
sudo ifconfig br0 inet 192.168.99.1

 sudo apt -y install isc-dhcp-server

sudo mcedit /etc/dhcp/dhcpd.conf add to the end of file :

subnet 192.168.99.0 netmask 255.255.255.0 {
option routers 192.168.99.1;

    option domain-name-servers 192.168.99.1;
    pool {
        range 192.168.99.8 192.168.99.64;
     }
}

sudo service isc-dhcp-server restart

sudo sysctl net.ipv4.ip_forward=1

sudo mcedit /etc/sysctl.conf

uncomment

net.ipv4.ip_forward=1

Install bind 9:

sudo apt -y install bind9

sudo service bind9 restart

NAT configuration with iptables:

sudo iptables --flush

sudo iptables -t nat --flush

iptables --delete-chain

sudo iptables -t nat -A POSTROUTING -o eno1 -j MASQUERADE

sudo iptables -A FORWARD -i br0 -j ACCEPT

/etc/network/interfaces file

auto br0
iface br0 inet static
   bridge_stp off
   bridge_fd 0
   bridge_maxwait 0
   address 192.168.99.1
   netmask 255.255.255.0

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