Bridge wlan0 to eth0 - Revision history

Bbbhltz: added Networking category, minor formatting

2023-04-18T14:19:12Z

added Networking category, minor formatting

← Older revision		Revision as of 14:19, 18 April 2023
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	{{TOC right}}		{{TOC right}}
	= Introduction =
			== Introduction ==

	This wiki describes methods to bridge a wired and wireless interface to enable network communication between hosts reachable via either interface. This allows one or more wired hosts to share the wireless interface on the bridge host.		This wiki describes methods to bridge a wired and wireless interface to enable network communication between hosts reachable via either interface. This allows one or more wired hosts to share the wireless interface on the bridge host.

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	I am only going to document the proxy ARP method as that's what I'm currently using. Please feel free to add additional methods and remove this section of the introduction.		I am only going to document the proxy ARP method as that's what I'm currently using. Please feel free to add additional methods and remove this section of the introduction.

	= Method 1: Proxy ARP =		== Method 1: Proxy ARP ==

	These steps result in a working solution where hosts on the wired side and hosts on the wireless side are all in the same ip network. There are no frills added, such as dhcp or automatic route entries for the wired hosts. Each wired host needs to have a manually configured IP address and an entry manually added to the bridge host's routing table.		These steps result in a working solution where hosts on the wired side and hosts on the wireless side are all in the same ip network. There are no frills added, such as dhcp or automatic route entries for the wired hosts. Each wired host needs to have a manually configured IP address and an entry manually added to the bridge host's routing table.

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	}}		}}

	{{Cmd\|# reboot		{{Cmd\|# reboot}}
	}}
			[[Category:Networking]]

Sodface at 16:45, 29 June 2020

2020-06-29T16:45:31Z

← Older revision		Revision as of 16:45, 29 June 2020
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	Notice that the wireless interface (wlan0) uses dhcp from the home network as usual and that an IP address is not used at all on the wired interface (eth0).		Notice that the wireless interface (wlan0) uses dhcp from the home network as usual and that an IP address is not used at all on the wired interface (eth0).

	Enable and create a local start-up script to add route entries ~~for your bridged wired hosts~~:		Enable and create a local start-up script to add route entries at boot:

	{{Cmd\| # rc-update add local default		{{Cmd\| # rc-update add local default
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	}}		}}

	Add route statements for each ~~bridged~~ wired ~~host~~:		Add route statements for each host on the wired side of the bridge:

	{{Cat\|/etc/local.d/RouteAdd.start\|		{{Cat\|/etc/local.d/RouteAdd.start\|

Sodface at 23:37, 27 June 2020

2020-06-27T23:37:28Z

← Older revision		Revision as of 23:37, 27 June 2020
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	These steps result in a working solution where hosts on the wired side and hosts on the wireless side are all in the same ip network. There are no frills added, such as dhcp or automatic route entries for the wired hosts. Each wired host needs to have a manually configured IP address and an entry manually added to the bridge host's routing table.		These steps result in a working solution where hosts on the wired side and hosts on the wireless side are all in the same ip network. There are no frills added, such as dhcp or automatic route entries for the wired hosts. Each wired host needs to have a manually configured IP address and an entry manually added to the bridge host's routing table.

	Note: For your wired hosts, use IP addresses in the same IP range as the rest of your network but outside of the scope used by a local DHCP server, if applicable. You may need to reduce your DHCP scope to free up IP addresses for ~~the wired hosts connected to the bridge~~.		Note: For your wired hosts, use IP addresses in the same IP range as the rest of your network but outside of the scope used by a local DHCP server, if applicable. You may need to reduce your DHCP scope to free up IP addresses for this purpose.

	Configure the network interfaces on your bridge host:		Configure the network interfaces on your bridge host:

Sodface at 23:36, 27 June 2020

2020-06-27T23:36:27Z

← Older revision		Revision as of 23:36, 27 June 2020
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	These steps result in a working solution where hosts on the wired side and hosts on the wireless side are all in the same ip network. There are no frills added, such as dhcp or automatic route entries for the wired hosts. Each wired host needs to have a manually configured IP address and an entry manually added to the bridge host's routing table.		These steps result in a working solution where hosts on the wired side and hosts on the wireless side are all in the same ip network. There are no frills added, such as dhcp or automatic route entries for the wired hosts. Each wired host needs to have a manually configured IP address and an entry manually added to the bridge host's routing table.

	Note: For your wired hosts, use IP addresses in the same IP range as the rest of your network but outside of the scope used by a local DHCP server, if applicable. You may need to reduce your DHCP scope to free up IP addresses for ~~your~~ wired bridge ~~hosts~~.		Note: For your wired hosts, use IP addresses in the same IP range as the rest of your network but outside of the scope used by a local DHCP server, if applicable. You may need to reduce your DHCP scope to free up IP addresses for the wired hosts connected to the bridge.

	Configure the network interfaces on your bridge host:		Configure the network interfaces on your bridge host:

Sodface at 16:34, 27 June 2020

2020-06-27T16:34:10Z

← Older revision		Revision as of 16:34, 27 June 2020
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	= Method 1: Proxy ARP =		= Method 1: Proxy ARP =
	These steps result in a working solution where hosts on the wired side and hosts on the wireless side are all in the same ip network. There are no frills added, such as dhcp or automatic route entries for the wired hosts. Each wired host needs to have a manually ~~configure~~ IP address and an entry manually added to the bridge host's routing table.		These steps result in a working solution where hosts on the wired side and hosts on the wireless side are all in the same ip network. There are no frills added, such as dhcp or automatic route entries for the wired hosts. Each wired host needs to have a manually configured IP address and an entry manually added to the bridge host's routing table.

	Note: For your wired hosts, use IP addresses in the same IP range as the rest of your network but outside of the scope used by a local DHCP server, if applicable. You may need to reduce your DHCP scope to free up IP addresses for your wired bridge hosts.		Note: For your wired hosts, use IP addresses in the same IP range as the rest of your network but outside of the scope used by a local DHCP server, if applicable. You may need to reduce your DHCP scope to free up IP addresses for your wired bridge hosts.

Sodface at 16:21, 27 June 2020

2020-06-27T16:21:58Z

← Older revision		Revision as of 16:21, 27 June 2020
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	net.ipv4.ip_forward = 1		net.ipv4.ip_forward = 1
	</nowiki>		</nowiki>
			}}

			{{Cmd\|# reboot
	}}		}}

Sodface at 16:20, 27 June 2020

2020-06-27T16:20:36Z

← Older revision		Revision as of 16:20, 27 June 2020
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	{{Cat\|/etc/sysctl.d/local.conf\|		{{Cat\|/etc/sysctl.d/local.conf\|
	<nowiki>		<nowiki>
	net.ipv4.conf.all.proxy_arp == 1		net.ipv4.conf.all.proxy_arp = 1
	net.ipv4.ip_forward == 1		net.ipv4.ip_forward = 1
	</nowiki>		</nowiki>
	}}		}}

Sodface at 16:20, 27 June 2020

2020-06-27T16:20:19Z

← Older revision		Revision as of 16:20, 27 June 2020
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	{{Cat\|/etc/sysctl.d/local.conf\|		{{Cat\|/etc/sysctl.d/local.conf\|
			<nowiki>
	net.ipv4.conf.all.proxy_arp == 1		net.ipv4.conf.all.proxy_arp == 1
	net.ipv4.ip_forward == 1		net.ipv4.ip_forward == 1
			</nowiki>
	}}		}}

Sodface at 16:17, 27 June 2020

2020-06-27T16:17:37Z

← Older revision		Revision as of 16:17, 27 June 2020
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	{{Cat\|/etc/sysctl.d/local.conf\|		{{Cat\|/etc/sysctl.d/local.conf\|
	net.ipv4.conf.all.proxy_arp = 1		net.ipv4.conf.all.proxy_arp == 1
	net.ipv4.ip_forward = 1		net.ipv4.ip_forward == 1
	}}		}}

Sodface at 16:16, 27 June 2020

2020-06-27T16:16:13Z

← Older revision		Revision as of 16:16, 27 June 2020
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	Configure the network interfaces on your bridge host:		Configure the network interfaces on your bridge host:


	{{Cat\|/etc/network/interfaces\|		{{Cat\|/etc/network/interfaces\|