UbuntuNetworking - Revision history

Bsd: Bsd moved page AnthonyLiguori/Networking to UbuntuNetworking without leaving a redirect: Moved to more relevant heading

2015-05-16T20:34:16Z

Bsd moved page AnthonyLiguori/Networking to UbuntuNetworking without leaving a redirect: Moved to more relevant heading

← Older revision

Revision as of 16:34, 16 May 2015

Setiawan at 06:52, 23 January 2013

2013-01-23T06:52:22Z

← Older revision		Revision as of 02:52, 23 January 2013
Line 44:		Line 44:
	== Installing config files ==		== Installing config files ==

	# Copy [[Media:dnsmasq.conf\|dnsmasq.conf]] to <code>/ec/dnsmasq.conf</code>		# Copy [[Media:dnsmasq.conf\|dnsmasq.conf]] to <code>/etc/dnsmasq.conf</code>
	# Copy [[Media:iptables.up.rules\|iptables.up.rules]] to <code>/etc/iptables.up.rules</code>		# Copy [[Media:iptables.up.rules\|iptables.up.rules]] to <code>/etc/iptables.up.rules</code>
	# Copy [[Media:qemu-ifup\|qemu-ifup]] to <code>/etc/qemu-ifup</code> and change permissions to <code>755</code>		# Copy [[Media:qemu-ifup\|qemu-ifup]] to <code>/etc/qemu-ifup</code> and change permissions to <code>755</code>

WikiSysop: Setting up NAT with KVM in Ubuntu

2009-02-04T15:03:37Z

Setting up NAT with KVM in Ubuntu

← Older revision		Revision as of 11:03, 4 February 2009
Line 1:		Line 1:
	= Setting up NAT with KVM in Ubuntu =		= Setting up NAT with KVM in Ubuntu =

	Normally, the best way to do guest networking is by setting up a bridge. However, if you use a wireless card, are frequently switching network interfaces or using VPN, or for other reason want to do NAT, then this outlines the easiest way to set it up with Ubuntu. The setup here is very similar to what [http://www.libvirt.org libvirt] uses for QEMU networking.		Normally, the best way to do guest networking is by setting up a bridge. However, if you use a wireless card, are frequently switching network interfaces or using VPN, or for other reason want to do NAT, then this outlines the easiest way to set it up with Ubuntu. The setup here is very similar to what [http://www.libvirt.org libvirt] uses for QEMU networking.

WikiSysop: /* Check Kernel Modules */

2009-02-04T15:02:26Z

Check Kernel Modules

← Older revision		Revision as of 11:02, 4 February 2009
Line 9:		Line 9:
	== Check Kernel Modules ==		== Check Kernel Modules ==

	Make sure that all of the following modules are around: either built in to the kernel or loadable. If you are running a plain distribution kernel, you should have all of these around without doing anything extra.		Make sure that all of the following modules are around: either built in to the kernel or loadable. If you are running a plain distribution kernel, you should have all of these around without doing anything extra.

	# lsmod		# lsmod
Line 22:		Line 22:
	nf_conntrack_ipv4 21776 3 iptable_nat		nf_conntrack_ipv4 21776 3 iptable_nat
	nf_conntrack 76688 5 xt_state,ipt_MASQUERADE,iptable_nat,nf_nat,nf_conntrack_ipv4		nf_conntrack 76688 5 xt_state,ipt_MASQUERADE,iptable_nat,nf_nat,nf_conntrack_ipv4


	== Enabling ip forwarding ==		== Enabling ip forwarding ==

WikiSysop: /* Install Dependencies */

2009-02-04T15:01:39Z

Install Dependencies

← Older revision		Revision as of 11:01, 4 February 2009
Line 5:		Line 5:
	== Install Dependencies ==		== Install Dependencies ==


	sudo apt-get install bridge-utils dnsmasq		sudo apt-get install bridge-utils dnsmasq


	== Check Kernel Modules ==		== Check Kernel Modules ==

WikiSysop: /* Configuring a bridge */

2009-02-04T15:01:05Z

Configuring a bridge

← Older revision		Revision as of 11:01, 4 February 2009
Line 33:		Line 33:
	== Configuring a bridge ==		== Configuring a bridge ==

	Add the following to the bottom of <code>/etc/network/interfaces		Add the following to the bottom of <code>/etc/network/interfaces</code>


	auto br0		auto br0
Line 45:		Line 44:
	bridge_ports none		bridge_ports none
	pre-up iptables-restore < /etc/iptables.up.rules		pre-up iptables-restore < /etc/iptables.up.rules


	== Installing config files ==		== Installing config files ==

WikiSysop: /* Enabling ip forwarding */

2009-02-04T15:00:42Z

Enabling ip forwarding

← Older revision		Revision as of 11:00, 4 February 2009
Line 29:		Line 29:

	Add the following line to the bottom of <code>/etc/sysctl.conf		Add the following line to the bottom of <code>/etc/sysctl.conf


	net.ipv4.ip_forward=1		net.ipv4.ip_forward=1


	== Configuring a bridge ==		== Configuring a bridge ==

WikiSysop: /* Installing config files */

2009-02-04T15:00:19Z

Installing config files

← Older revision		Revision as of 11:00, 4 February 2009
Line 52:		Line 52:
	== Installing config files ==		== Installing config files ==

	1. Copy [~~attachment~~:dnsmasq.conf dnsmasq.conf] to <code>/~~etc~~/dnsmasq.conf		# Copy [[Media:dnsmasq.conf\|dnsmasq.conf]] to <code>/ec/dnsmasq.conf</code>
	1. Copy [~~attachment~~:iptables.up.rules iptables.up.rules] to <code>/etc/iptables.up.rules		# Copy [[Media:iptables.up.rules\|iptables.up.rules]] to <code>/etc/iptables.up.rules</code>
	1. Copy [~~attachment~~:qemu-ifup qemu-ifup] to <code>/etc/qemu-ifup</code> and change permissions to <code>755</code>		# Copy [[Media:qemu-ifup\|qemu-ifup]] to <code>/etc/qemu-ifup</code> and change permissions to <code>755</code>

WikiSysop at 14:57, 4 February 2009

2009-02-04T14:57:22Z

New page

= Setting up NAT with KVM in Ubuntu =

Normally, the best way to do guest networking is by setting up a bridge. However, if you use a wireless card, are frequently switching network interfaces or using VPN, or for other reason want to do NAT, then this outlines the easiest way to set it up with Ubuntu. The setup here is very similar to what [http://www.libvirt.org libvirt] uses for QEMU networking.

== Install Dependencies ==

sudo apt-get install bridge-utils dnsmasq

== Check Kernel Modules ==

Make sure that all of the following modules are around: either built in to the kernel or loadable. If you are running a plain distribution kernel, you should have all of these around without doing anything extra.

# lsmod
Module Size Used by
tun 15616 0
bridge 64104 0
llc 11504 1 bridge
xt_state 5248 1
ipt_MASQUERADE 6720 1
iptable_nat 10512 1
nf_nat 24344 2 ipt_MASQUERADE,iptable_nat
nf_conntrack_ipv4 21776 3 iptable_nat
nf_conntrack 76688 5 xt_state,ipt_MASQUERADE,iptable_nat,nf_nat,nf_conntrack_ipv4

== Enabling ip forwarding ==

Add the following line to the bottom of <code>/etc/sysctl.conf

net.ipv4.ip_forward=1

== Configuring a bridge ==

Add the following to the bottom of <code>/etc/network/interfaces

auto br0
iface br0 inet static
address 10.0.1.1
netmask 255.255.255.0
network 10.0.1.0
bridge_stp off
bridge_maxwait 5
bridge_ports none
pre-up iptables-restore < /etc/iptables.up.rules

== Installing config files ==

1. Copy [attachment:dnsmasq.conf dnsmasq.conf] to <code>/etc/dnsmasq.conf
1. Copy [attachment:iptables.up.rules iptables.up.rules] to <code>/etc/iptables.up.rules
1. Copy [attachment:qemu-ifup qemu-ifup] to <code>/etc/qemu-ifup</code> and change permissions to <code>755</code>