IPv6 testing

JoelC707

Looks like we're good. DSL just went out, watched the gateways on the dashboard and both came up at the same time just as they are supposed to.

alexis.olivier

Hello everybody,

I just pointed out a little bug and have a feature to request for the DHCPv6 Server.

The bug :
On the DHCPv6 page, when you have a non-common bitmask, showed range is incorrect. My exemple :

Address XXXX:XXXX:XXXX:XXXX::1
Subnet mask 65 bits
Available range XXXX:XXXX:XXXX:XXXX:0:0:0:1 - XXXX:XXXX:XXXX:XXXX:ffff:ffff:ffff:ffff

The available range should be :
Available range XXXX:XXXX:XXXX:XXXX:0:0:0:1 - XXXX:XXXX:XXXX:XXXX:7fff:ffff:ffff:ffff

and when specifying XXXX:XXXX:XXXX:XXXX:0:0:0:1 - XXXX:XXXX:XXXX:XXXX:ffff:ffff:ffff:ffff to the dhcp server, the server starts but doesn't deliver addresses on the network.

The feature :
You should add a checkbox allowing to disable the "Autonomous address-configuration", setting the rtadvd option "pinfoflags" to 0 (or "") for the interface.
In my case, i need to disable this to keep the router advertisement but not to have autoconfigurated addresses or subnets delivered (because i have several different subnets linked to the same interface).

Thanks to everyone for your excellent work on the IPv6 part !

–- EDIT ---

An old bug reappeared :

In line 736, you should change :

$dhcpdv6conf .= "            deny unknown clients;\n";

by

$dhcpdv6conf .= "            deny unknown-clients;\n";

cmb

I added tickets on the two issues you mentioned.
http://redmine.pfsense.org/issues/1725
http://redmine.pfsense.org/issues/1726

The last one, deny unknown-clients is correct in mainline, maybe you're still syncing from Seth's old branch? You don't have the latest code somehow.

alexis.olivier

Thanks to you for adding tickets.

In effect, i hadn't changed the repo URL.
But I changed it now and ran a fresh gitsync from "https://github.com/bsdperimeter/pfsense.git", and the "deny unknow clients" bug is still there.
Am i doing something wrong ? Is this the good URL ?

Thanks for your answers !

cmb

run 'rm -rf /root/pfsense*' and sync again from that URL. That's correct URL, but that's not where you're getting code from.

databeestje

We need to replace the current subnet range calculator for a v6 prefix. Its just outright wrong.

iFloris

I just ran into an interesting possible issue. In osx lion (10.7) all ethernet interfaces receive not one, but multiple v6 addresses. The first address is a stateless autoconfig address which has been the same since the very first pfsense-v6 builds. The second address seems to change every reboot.

I've even had three addresses show in this panel.
I'm not sure if this is a new feature in 10.7, if these addresses were there all along but weren't shown or if there is something up with the dvhpv6 server on my pfsense install. Any thoughts?

jimp

@iFloris:

I just ran into an interesting possible issue. In osx lion (10.7) all ethernet interfaces receive not one, but multiple v6 addresses. The first address is a stateless autoconfig address which has been the same since the very first pfsense-v6 builds. The second address seems to change every reboot.
[snip]
I've even had three addresses show in this panel.
I'm not sure if this is a new feature in 10.7, if these addresses were there all along but weren't shown or if there is something up with the dvhpv6 server on my pfsense install. Any thoughts?

The same thing happens on Windows, it gets multiple IPs per interface. I haven't looked too deeply, but it would really be nice if it just had the one address, from DHCPv6, and no others.

johnpoz

most likely you seeing multiple because of stateless autoconfiguration, not sure how to disable in os x, but on windows you can setup routerdiscovery=disabled with netsh, or you can do with dhcp option as well I do believe.

if you want turn off the auto ipv6 on linux you could do it with say this setting in your /etc/sysctl.conf replacing your interface of course.

net.ipv6.conf.eth0.autoconf=0

windexh8er

Is the IPv6 support going to be rolled up into the final release (i.e. SLAAC / DHCPv6)?

EDIT:

OK, so I see that IPv6 is not going to be in 2.0 for release:

http://redmine.pfsense.org/projects/pfsense/roadmap#2.1-IPv6

…so at this point is it better to just sync the git repo to add IPv6 to my current 2.0 snapshot - or start from scratch with the IPv6 ISO's here:

http://files.pfsense.org/jimp/ipv6/

Thanks!

jimp

Either way is fine. Personally, I just use stock images + gitsync. If you are installing from scratch already, you may as well use an iso from there. Those are getting a bit stale though, I need to make a new set one of these days.

iFloris

@jimp, @johnpoz thanks for the info, I did not know that Windows showed the same behaviour.
I thought it might be an issue, as I had not seen two or three v6 addresses under osx snow leopard (10.6).
Before 10.7, my machines only had the stateless autoconfig addresses.
It seems that 10.7 has silently added a dchpv6 feature, though my dhcpv6 leases page on pfsense doesn't show anything.
This blog post seems to agree with my findings.

Also, while searching for a way to disable stateless autoconfig as per @johnpoz's suggestion, I came accross a post on the same site as above explaining how to disable stateless autoconfig on windows xp, vista, 7 and osx 10.7 lion.

johnpoz

That link is not about autoconf, its about privacy – turning off the use of your MAC in the address generated.

iFloris

@johnpoz, you are right, I mistakenly assumed that privacy addressing and stateless autoconfig were the same thing.

windexh8er

@iFloris:

I just ran into an interesting possible issue. In osx lion (10.7) all ethernet interfaces receive not one, but multiple v6 addresses. The first address is a stateless autoconfig address which has been the same since the very first pfsense-v6 builds. The second address seems to change every reboot.

I've even had three addresses show in this panel.
I'm not sure if this is a new feature in 10.7, if these addresses were there all along but weren't shown or if there is something up with the dvhpv6 server on my pfsense install. Any thoughts?

This is due to how temporary addresses work in SLAAC and v6. If you do an ifconfig on your OS X terminal you'll see one of the two listed as temporary.

databeestje

Lion has a dhcp6 client, that wasn't there before, thus more addresses assigned.