On 2017-10-02 10:28, Ed D. wrote:
Josh,
Thanks for the reply.
For some reason it didn't make it here.
Could you send it again?
Sure. One key - pass the ICMPv6 protocol in your packet filters.
You'll have lots of head-desk
moments if you are blocking ICMPv6. This is protocol number 58,
"ipv6-icmp" in /etc/protocols and
therefore also in your pf.conf(5) file.
I chose wide-dhcpv6 at the time I deployed IPv6, based on a
recommendation in misc@, and
never changed this.
On the router:
1. Only the external interface has SLAAC configured
with "inet6 autoconf." The internal interface hostname.if(5)
file only provisions IPv4 addressing.
2. The wide-dhcpv6 package includes both client and server. The
client obtains the prefix allocation from Comcast, and is
started from rc.local(8). My configuration file (/etc/dhcpdis: with:
/usr/local/sbin/dhcp6c $EXTERNAL_NIC
My configuration file is:
interface $EXTERNAL_NIC {
send ia-pd 0;
send ia-na 0;
send rapid-commit;
request domain-name-servers;
request domain-name;
};
id-assoc na 0 {
};
id-assoc pd 0 {
prefix-interface $INTERNAL_NIC {
sla-len 0;
};
};
3. I start rtadvd(8) from its rc.d(8) script, using the $INTERNAL_NIC
as the flag. You can enable and set the flag with rcctl(8), or
edit rc.conf.local(8) manually. I do not have a configuration file.
The $INTERNAL NIC (in my case, vlan2) will have IPv6 provisioning, as
shown below:
vlan2: flags=8943 mtu
1500
lladdr 00:0d:b9:2f:9a:7c
description: << Backplane >>
index 7 priority 0 llprio 3
vlan: 2 parent interface: trunk0
vnetid: 2
parent: trunk0
groups: vlan
status: active
inet 10.0.1.254 netmask 0xff00 broadcast 10.0.1.255
inet6 fe80::20d:b9ff:fe2f:9a7c%vlan2 prefixlen 64 scopeid 0x7
inet6 2601::::::: prefixlen 64
And any SLAAC using device on the internal LAN will receive
and router advertisements, such as this OpenBSD laptop using inet6
autoconf:
vlan2: flags=208843
mtu 1500
lladdr f0:de:f1:78:7c:39
index 43 priority 0 llprio 3
encap: vnetid 2 parent em0
groups: vlan egress
media: Ethernet autoselect (1000baseT full-duplex)
status: active
inet 10.0.1.130 netmask 0xff00 broadcast 10.0.1.255
inet6 fe80::f2de:f1ff:fe78:7c39%vlan2 prefixlen 64 scopeid 0x2b
inet6 2601::::::: prefixlen 64
autoconf pltime 604784 vltime 2591984
inet6 2601::::::: prefixlen 64
autoconf autoconfprivacy pltime 85390 vltime 603971
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