wlan0 && IPv6

[Matthias Apitz]

El día miércoles, julio 04, 2018 a las 04:02:22p. m. +0200, Harry Schmalzbauer escribió:

> Am 04.07.2018 um 15:30 schrieb Matthias Apitz:
> > Hello,
> >
> > This morning I was in the Wifi area of the Munich Filmfest. They give the SSID
> > and the WPA-2 password to anybody. While my FreeBSD (CURRENT) could associate fine,
> > I did not get any IP addr. My Linux cellphone was working fine out of
> > the box and showed an IPv6 addr in the network interface.
> >
> > How this must be configured in FreeBSD?
> 
> It was porbably v6 only (W)LAN.
> dhclient(8) in base does only care about IPv4.
> 
> For IPv6 stateless, you need to watch
> sysctl(8) net.inet6.ip6.no_radr
> and
> ifconfig(8) -no_radr
> 
> By default, if set ipv6_activate_all_interfaces="YES" in rc.conf(5), I 
> think you should get a stateless IPv6 address (since 
> net.inet6.ip6.no_radr=0, hence no no_radr flag for your IPv6-enablef 
> interface (wlan0)), as long as there's a router in the (W)LAN advertising.
> 
> For stateful IPv6, you must install somethink like KAME-dhcp6 
> (ports/net/dhcp6).
> 
> But the latter isn't widely deployed, most setups I've seen have routers 
> advertising and clients with stateless setup.
> 
> Can't tell you out of mind what your rc.conf(5) should look like to 
> enable stateless config for distinct interfaces, but I'm sure you'll 
> quickly find if you look for the above mentiond key words.
> 
> Viel Spass auf'm Filmfest :-)

Thanks for the reply. I have now in rc.conf the following lines:

/etc/rc.conf

wlans_ath0="wlan0"
ifconfig_wlan0="WPA DHCP"
# IPv6 starts here
# add ipv6 entry for wlan0
ipv6_network_interfaces="wlan0"
# set up wlan0 to accept rtadv(8) advertisements
ifconfig_wlan0_ipv6="inet6 accept_rtadv"
ip6addrctl_enable="YES"
ip6addrctl_policy="ipv6_prefer"
ipv6_activate_all_interfaces="YES"
# ifconfig_wlan0_ipv6="YES"
# IPv6 end here

And when the interface associates it gives the output attached below for
ifconfig and netstat; but nothing is working, esp. not

# ping6 www.muc.de

I have no idea, what's missing... It's not an big issue for me, as I can
use my Linux phone as a hotspot, but would be nice to get this working
for the next year's filmfest.

	matthias

$ ifconfig wlan0

wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	ether 90:48:9a:92:9e:43
	inet6 fe80::9248:9aff:fe92:9e43%wlan0 prefixlen 64 scopeid 0x2 
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	media: IEEE 802.11 Wireless Ethernet MCS mode 11ng
	status: associated
	ssid filmfestguest channel 12 (2467 MHz 11g ht/20) bssid 00:0f:c9:16:ad:f3
	regdomain 108 indoor ecm authmode WPA2/802.11i privacy ON
	deftxkey UNDEF AES-CCM 3:128-bit txpower 20 bmiss 7 scanvalid 60
	protmode CTS ampdulimit 64k ampdudensity 4 shortgi wme burst
	roaming MANUAL
	groups: wlan 

$ netstat -rn

Routing tables

Internet:
Destination        Gateway            Flags     Netif Expire
127.0.0.1          link#1             UH          lo0

Internet6:
Destination                       Gateway                       Flags     Netif Expire
::/96                             ::1                           UGRS        lo0
::1                               link#1                        UH          lo0
::ffff:0.0.0.0/96                 ::1                           UGRS        lo0
fe80::/10                         ::1                           UGRS        lo0
fe80::%lo0/64                     link#1                        U           lo0
fe80::1%lo0                       link#1                        UHS         lo0
fe80::%wlan0/64                   link#2                        U         wlan0
fe80::9248:9aff:fe92:9e43%wlan0   link#2                        UHS         lo0
ff02::/16                         ::1                           UGRS        lo0


# Generated by resolvconf
nameserver 192.168.2.1

-- 
Matthias Apitz, ✉ guru at unixarea.de, http://www.unixarea.de/ +49-176-38902045
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May, 9: Спаси́бо освободители! Thank you very much, Russian liberators!