Setup personal local network within one machine
Expected result
+----------------------+ +----------+
| real machine | | |
|(dhcp and dns server) |<-->| internet |
| 10.1.0.254 | | |
+----------------------+ +----------+
/\ /\
|| ||
\/ ||
+----------------------+ ||
| virtual machine | ||
| (ip set up by dhcp | ||
| server above) |<========//
| 10.1.0.1 |
+----------------------+
somethig like this I guess… :)
Installing needed software
We need:
- virtualbox
- dnsmasq (it will be our dns and dhcp server)
and we install:
wget -q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add -
sudo aptitude install virtualbox-4.1 dnsmasq
Configuring
Virtualbox:
Turn off native virtualbox dhcp server.
Configure virtualbox’s virtual network adapter to have static ip address 10.1.0.254 and netmask 255.255.255.0.
Configure target virtual machine network to ‘host virtual adapter’.
Configure dnsmasq:
uncomment following line in /etc/dnsmasq.conf:
conf-dir=/etc/dnsmasq.d
and add following to /etc/dnsmasq.d/dhcp.conf:
interface=vboxnet0
dhcp-range=10.1.0.1,10.1.0.10,12h
log-dhcp # for debugging
By default dnsmasq will log debug info /var/log/syslog, look there if you run into trouble.
run on virtual machine:
sudo dhclient eth0
and see ip there
ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:0b:f4:44 brd ff:ff:ff:ff:ff:ff
inet 10.1.0.9/24 brd 10.1.0.255 scope global eth0
inet6 fe80::a00:27ff:fe0b:f444/64 scope link
valid_lft forever preferred_lft forever
and in syslog:
dnsmasq-dhcp[16896]: 1660038144 available DHCP range: 10.1.0.1 – 10.1.0.10
dnsmasq-dhcp[16896]: 1660038144 DHCPREQUEST(vboxnet0) 10.1.0.9 08:00:27:0b:f4:44
dnsmasq-dhcp[16896]: 1660038144 DHCPACK(vboxnet0) 10.1.0.9 08:00:27:0b:f4:44
dnsmasq-dhcp[16896]: 1660038144 requested options: 1:netmask, 28:broadcast, 2:time-offset, 3:router,
dnsmasq-dhcp[16896]: 1660038144 requested options: 15:domain-name, 6:dns-server, 119:domain-search,
dnsmasq-dhcp[16896]: 1660038144 requested options: 12:hostname, 44:netbios-ns, 47:netbios-scope,
dnsmasq-dhcp[16896]: 1660038144 requested options: 26:mtu, 121:classless-static-route, 42:ntp-server
dnsmasq-dhcp[16896]: 1660038144 tags: vboxnet0
dnsmasq-dhcp[16896]: 1660038144 next server: 10.1.0.254
dnsmasq-dhcp[16896]: 1660038144 sent size: 1 option: 53:message-type 05
dnsmasq-dhcp[16896]: 1660038144 sent size: 4 option: 54:server-identifier 10.1.0.254
dnsmasq-dhcp[16896]: 1660038144 sent size: 4 option: 51:lease-time 00:00:a8:c0
dnsmasq-dhcp[16896]: 1660038144 sent size: 4 option: 58:T1 00:00:54:60
dnsmasq-dhcp[16896]: 1660038144 sent size: 4 option: 59:T2 00:00:93:a8
dnsmasq-dhcp[16896]: 1660038144 sent size: 4 option: 1:netmask 255.255.255.0
dnsmasq-dhcp[16896]: 1660038144 sent size: 4 option: 28:broadcast 10.1.0.255
dnsmasq-dhcp[16896]: 1660038144 sent size: 4 option: 3:router 10.1.0.254
dnsmasq-dhcp[16896]: 1660038144 sent size: 4 option: 6:dns-server 10.1.0.254
now we can connect to virtual machine with ssh, and vice versa
Configure internet access for virtual machine(UNDONE FROM HERE)
Enable ip forwarding:
echo 1 | sudo tee /proc/sys/net/ipv4/ip_forward
or uncomment line net.ipv4.ip_forward = 1 in /etc/sysctl.conf
and run:
sudo sysctl -p /etc/sysctl.conf
iptables:
sudo iptables -I FORWARD -i vboxnet0 -d 10.1.0.0/255.255.255.0 -j DROP
sudo iptables -A FORWARD -i vboxnet0 -s 10.1.0.0/255.255.255.0 -j ACCEPT
sudo iptables -A FORWARD -i wlan0 -d 10.1.0.0/255.255.255.0 -j ACCEPT
sudo iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE
and lets save our settings into file:
sudo mkdir /etc/iptables
sudo iptables-save | sudo tee /etc/iptables/simple.router.rules
the contents of /etc/iptables/simple.router.rules:
TODO
now internet on virtual machine should work