Hetzner ipv6 - Revision history

Tykling at 12:30, 10 October 2012

2012-10-10T12:30:55Z

← Older revision		Revision as of 12:30, 10 October 2012
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	With Hetzner IPv6 you get a default gateway that is outside your own subnet. This can be rather frustrating to configure with FreeBSD, so I just use the link-local address of the router instead.		With Hetzner IPv6 you get a default gateway that is outside your own subnet. This can be rather frustrating to configure with FreeBSD, so I just use the link-local address of the router instead of using the gateway that Hetzner provides me with.

	== Finding the routers link-local fe80:: IP address ==		== Finding the routers link-local fe80:: IP address ==

Tykling: /* Finding the routers link-local fe80:: IP address */

2012-10-10T12:26:59Z

Finding the routers link-local fe80:: IP address

← Older revision		Revision as of 12:26, 10 October 2012
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	</pre>		</pre>
	This means I can add the line <code>ipv6_defaultrouter="fe80::7afe:3dff:fe46:ec8f%em0"</code> to <code>/etc/rc.conf</code> and IPv6 works.		This means I can add the line <code>ipv6_defaultrouter="fe80::7afe:3dff:fe46:ec8f%em0"</code> to <code>/etc/rc.conf</code> and IPv6 works.

			Note that you need to append <code>%em0</code> or whatever your interface is called, otherwise ping6 doesn't know which interface to use.

	'''Note: Is seems that Hetzner has decided (finally) to add fe80::1 to all their routers, so the ipv6 gateway is fe80::1%interface no matter which datacenter you are in. This has the added advantage that the gateway IP doesn't change if they change the hardware (a normal link-local fe80:: IP is constructed from the mac-address of the interface).		'''Note: Is seems that Hetzner has decided (finally) to add fe80::1 to all their routers, so the ipv6 gateway is fe80::1%interface no matter which datacenter you are in. This has the added advantage that the gateway IP doesn't change if they change the hardware (a normal link-local fe80:: IP is constructed from the mac-address of the interface).

Tykling: /* Finding the routers link-local fe80:: IP address */

2012-10-10T12:25:59Z

Finding the routers link-local fe80:: IP address

← Older revision		Revision as of 12:25, 10 October 2012
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	== Finding the routers link-local fe80:: IP address ==		== Finding the routers link-local fe80:: IP address ==
	IPv6 has a bunch of [http://en.wikipedia.org/wiki/Multicast_address#IPv6 Well-known IPv6 multicast addresses] where one of them is <code>ff02::2</code>. I can ~~<code>ping6 ff02::2</code>~~ on any network to see if any routers are present on the network.		IPv6 has a bunch of [http://en.wikipedia.org/wiki/Multicast_address#IPv6 Well-known IPv6 multicast addresses] where one of them is <code>ff02::2</code>. I can use this on any network to see if any routers are present on the network. To find the IP of my IPv6 default gateway on the Hetzner network my server is on:

	<pre>		<pre>

Tykling: /* Using the routers fe80:: address */

2012-10-10T12:25:12Z

Using the routers fe80:: address

← Older revision		Revision as of 12:25, 10 October 2012
Line 1:		Line 1:
	With Hetzner IPv6 you get a default gateway that is outside your own subnet. This can be rather frustrating to configure with FreeBSD, so I just use the link-local address of the router instead.		With Hetzner IPv6 you get a default gateway that is outside your own subnet. This can be rather frustrating to configure with FreeBSD, so I just use the link-local address of the router instead.

	== ~~Using~~ the routers fe80:: address ==		== Finding the routers link-local fe80:: IP address ==
			IPv6 has a bunch of [http://en.wikipedia.org/wiki/Multicast_address#IPv6 Well-known IPv6 multicast addresses] where one of them is <code>ff02::2</code>. I can <code>ping6 ff02::2</code> on any network to see if any routers are present on the network.

	<pre>		<pre>
	$ ping6 ff02::2%em0		$ ping6 ff02::2%em0

Tykling at 12:21, 10 October 2012

2012-10-10T12:21:15Z

← Older revision		Revision as of 12:21, 10 October 2012
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	This means I can add the line <code>ipv6_defaultrouter="fe80::7afe:3dff:fe46:ec8f%em0"</code> to <code>/etc/rc.conf</code> and IPv6 works.		This means I can add the line <code>ipv6_defaultrouter="fe80::7afe:3dff:fe46:ec8f%em0"</code> to <code>/etc/rc.conf</code> and IPv6 works.

	~~== Using static NDP~~ (~~not recommended~~) ==		'''Note: Is seems that Hetzner has decided (finally) to add fe80::1 to all their routers, so the ipv6 gateway is fe80::1%interface no matter which datacenter you are in. This has the added advantage that the gateway IP doesn't change if they change the hardware (a normal link-local fe80:: IP is constructed from the mac-address of the interface).

	~~This is for rc.conf~~:		In the datacenters where they already made this change, pinging ff02::2%interface looks like this:
	<pre>		<pre>
	~~### v6 extra config due to weird v6 setup at hetzner~~		[tykling@haze ~]$ ping6 ff02::2%re0
	~~ipv6_static_routes="gw"~~		PING6(56=40+8+8 bytes) fe80::4261:86ff:fee9:d063%re0 --> ff02::2%re0
	~~ipv6_route_gw~~=~~"2a01~~:~~4f8~~:~~141~~:~~52a0~~::1 -~~iface~~ re0"		16 bytes from fe80::1%re0, icmp_seq=0 hlim=64 time=2.383 ms
	~~static_ndp_pairs="gw"~~		16 bytes from fe80::1%re0, icmp_seq=1 hlim=64 time=1.072 ms
	~~static_ndp_gw="2a01:4f8:141:52a0~~::1 0:26:88:75:~~e7:95"~~		^C
	~~v6_network_extra_enable~~=~~"YES"~~		--- ff02::2%re0 ping6 statistics ---
			2 packets transmitted, 2 packets received, 0.0% packet loss
			round-trip min/avg/max/std-dev = 1.072/1.728/2.383/0.656 ms

			[tykling@haze ~]$
	</pre>		</pre>

	~~Replace my values with your ipv6 default gateway's IP and mac address.~~		Thanks to Hetzner for realizing that their IPv6 network setup was causing problems for customers, and taking appropriate steps to rectify the situation.

	You also need two rc.d scripts: <code>/etc/rc.d/static_ndp</code> (included in base from FreeBSD 9, if you need it find it [http://svn.freebsd.org/base/head/etc/rc.d/static_ndp here]). The other script, <code>/usr/local/etc/rc.d/v6_network_extra</code> is not included in FreeBSD (yet), it looks like this:
	~~<pre>~~
	~~#!/bin/sh~~
	#
	~~# ipv6 tunnels and default router~~
	#

	~~# PROVIDE: v6_network_extra~~
	~~# REQUIRE: NETWORKING static_ndp~~
	~~# KEYWORD: nojail~~

	~~. /etc/rc.subr~~

	~~name="v6_network_extra"~~
	~~start_cmd="v6_network_extra_start"~~

	~~v6_network_extra_start()~~
	{
	~~/sbin/route -n add -inet6 default 2a01:4f8:141:52a0::1~~
	~~/etc/rc.d/static_ndp restart~~
	}

	~~load_rc_config $name~~
	~~run_rc_command "$1"~~
	~~</pre>~~
	~~'''Remember~~ to ~~change your default gateway in this script~~, and ~~remember~~ to ~~chmod +x~~ the ~~script~~.~~'''~~

Tykling at 18:00, 23 July 2012

2012-07-23T18:00:38Z

← Older revision		Revision as of 18:00, 23 July 2012
Line 1:		Line 1:
			With Hetzner IPv6 you get a default gateway that is outside your own subnet. This can be rather frustrating to configure with FreeBSD, so I just use the link-local address of the router instead.

			== Using the routers fe80:: address ==
			<pre>
			$ ping6 ff02::2%em0
			PING6(56=40+8+8 bytes) fe80::ea40:f2ff:fe09:be0%em0 --> ff02::2%em0
			16 bytes from fe80::7afe:3dff:fe46:ec8f%em0, icmp_seq=0 hlim=64 time=3.470 ms
			16 bytes from fe80::7afe:3dff:fe46:ec8f%em0, icmp_seq=1 hlim=64 time=1.033 ms
			^C
			--- ff02::2%em0 ping6 statistics ---
			2 packets transmitted, 2 packets received, 0.0% packet loss
			round-trip min/avg/max/std-dev = 1.033/2.252/3.470/1.218 ms

			$
			</pre>
			This means I can add the line <code>ipv6_defaultrouter="fe80::7afe:3dff:fe46:ec8f%em0"</code> to <code>/etc/rc.conf</code> and IPv6 works.

			== Using static NDP (not recommended) ==

	This is for rc.conf:		This is for rc.conf:
	<pre>		<pre>

Tykling at 20:12, 22 July 2012

2012-07-22T20:12:07Z

← Older revision		Revision as of 20:12, 22 July 2012
Line 36:		Line 36:
	run_rc_command "$1"		run_rc_command "$1"
	</pre>		</pre>
	Remember to change your default gateway in this script ~~as well~~.		'''Remember to change your default gateway in this script, and remember to chmod +x the script.'''

Tykling at 20:55, 29 February 2012

2012-02-29T20:55:55Z

← Older revision		Revision as of 20:55, 29 February 2012
Line 11:		Line 11:
	Replace my values with your ipv6 default gateway's IP and mac address.		Replace my values with your ipv6 default gateway's IP and mac address.

	You also need two rc.d scripts: <code>/etc/rc.d/static_ndp</code> (included in base from FreeBSD 9, if you need it find it [[http://svn.freebsd.org/base/head/etc/rc.d/static_ndp here]]). The other script, <code>/usr/local/etc/rc.d/v6_network_extra</code> is not included in FreeBSD (yet), it looks like this:		You also need two rc.d scripts: <code>/etc/rc.d/static_ndp</code> (included in base from FreeBSD 9, if you need it find it [http://svn.freebsd.org/base/head/etc/rc.d/static_ndp here]). The other script, <code>/usr/local/etc/rc.d/v6_network_extra</code> is not included in FreeBSD (yet), it looks like this:
	<pre>		<pre>
	#!/bin/sh		#!/bin/sh

Tykling at 20:54, 29 February 2012

2012-02-29T20:54:59Z

← Older revision		Revision as of 20:54, 29 February 2012
Line 9:		Line 9:
	</pre>		</pre>

	Replace my values with your ipv6 default gateway and mac address.		Replace my values with your ipv6 default gateway's IP and mac address.

	You also need two rc.d scripts: <code>/etc/rc.d/static_ndp</code> (included in base from FreeBSD 9, if you need it find it [[http://svn.freebsd.org/base/head/etc/rc.d/static_ndp here]]). The other script, <code>/usr/local/etc/rc.d/v6_network_extra</code> is not included in FreeBSD (yet), it looks like this:		You also need two rc.d scripts: <code>/etc/rc.d/static_ndp</code> (included in base from FreeBSD 9, if you need it find it [[http://svn.freebsd.org/base/head/etc/rc.d/static_ndp here]]). The other script, <code>/usr/local/etc/rc.d/v6_network_extra</code> is not included in FreeBSD (yet), it looks like this:

Tykling: Created page with "This is for rc.conf:

 ### v6 extra config due to weird v6 setup at hetzner ipv6_static_routes="gw" ipv6_route_gw="2a01:4f8:141:52a0::1 -iface re0" static_ndp_pairs="gw" s..."

2012-02-29T20:53:12Z

Created page with "This is for rc.conf: <pre> ### v6 extra config due to weird v6 setup at hetzner ipv6_static_routes="gw" ipv6_route_gw="2a01:4f8:141:52a0::1 -iface re0" static_ndp_pairs="gw" s..."

New page

This is for rc.conf:
<pre>
### v6 extra config due to weird v6 setup at hetzner
ipv6_static_routes="gw"
ipv6_route_gw="2a01:4f8:141:52a0::1 -iface re0"
static_ndp_pairs="gw"
static_ndp_gw="2a01:4f8:141:52a0::1 0:26:88:75:e7:95"
v6_network_extra_enable="YES"
</pre>

Replace my values with your ipv6 default gateway and mac address.

You also need two rc.d scripts: <code>/etc/rc.d/static_ndp</code> (included in base from FreeBSD 9, if you need it find it [[http://svn.freebsd.org/base/head/etc/rc.d/static_ndp here]]). The other script, <code>/usr/local/etc/rc.d/v6_network_extra</code> is not included in FreeBSD (yet), it looks like this:
<pre>
#!/bin/sh
#
# ipv6 tunnels and default router
#

# PROVIDE: v6_network_extra
# REQUIRE: NETWORKING static_ndp
# KEYWORD: nojail

. /etc/rc.subr

name="v6_network_extra"
start_cmd="v6_network_extra_start"

v6_network_extra_start()
{
/sbin/route -n add -inet6 default 2a01:4f8:141:52a0::1
/etc/rc.d/static_ndp restart
}

load_rc_config $name
run_rc_command "$1"
</pre>
Remember to change your default gateway in this script as well.