gaeajaree
Inscrit le: 19 Juin 2013 Messages: 5 Localisation: England
|
Posté le: Lun 24 Juin 2013, 23:04 Sujet du message: Using Ubuntu 12.04 as router firewall Nimmis Worl |
|
|
sudo cp /etc/network/interfaces /etc/network/interfaces.bak
adding net for 2nd interface eth1
add the following information to /etc/network/interfaces
# Set up the internal wired network## Don't forget to change eth1 to the proper name of the internal# wired network interface if applicable.#auto eth1iface eth1 inet static address 192.168.0.1 network 192.168.0.0 netmask 255.255.255.0 broadcast 192.168.0.255
restart network with
sudo /etc/init.d/networking restart
Setup dhcp server for local network
sudo apt-get install dhcp3-server
inte the file /etc/dhcp/dhcpd.conf insert the following
authoritative;option domain-name "mydomain";option domain-name-servers 8.8.8.8, 8.8.4.4, 192.168.0.1;default-lease-time 600;max-lease-time 7200;option subnet-mask 255.255.255.0;option broadcast-address 192.168.0.255;option routers 192.168.0.1;subnet 192.168.0.0 netmask 255.255.255.0 { range 192.168.0.32 192.168.0.128 ; ?option routers 192.168.0.1 ;}
then edit /etc/default/isc-dhcp-server
INTERFACES="eth1"
then restart dhcp server
sudo service isc-dhcp-server restart
Setting up the firewall
Be sure that ufw is installed on the system
sudo apt-get install ufw
edit the file?/etc/default/ufw and change the line
DEFAULT_FORWARD_POLICY="DROP"
so it reads
DEFAULT_FORWARD_POLICY="ACCEPT"
then we need to enable packet forward between the interfaces
edit the file,CHRISTIAN LOUBOUTIN SANDALS?/etc/ufw/sysctl,CHRISTIAN LOUBOUTIN FLAT.conf and remove the # infront of the line below so it reads
net/ipv4/ip_forward=1
One final file to change before we are upp and running
change the file /etc/ufw/before.rules?add these line in the top before any commands
# nat rules*nat OSTROUTING ACCEPT [0:0]# Forward all packes through eth0-A POSTROUTING -s 192.168.100.0/24 -o eth0 -j MASQUERADE# WARNING, do not remove COMMIT line. This breaks the loadingCOMMIT
Before starting the firewall, if you want to be able to access it with ssh you need to enable a rule accepting connections on port 22
ufw allow 22
Then start it up
ufw disable &&,CHRISTIAN LOUBOUTIN PLATFORMS; sudo ufw enable |
|