Hey there,
so I was kinda un/successful in setting up 6rd tunnel to my ISP. My IPv6 knowledge is rather lacking so here I am.
I already had iproute2 snippet to set it up on my PC and when I used that on my Omnia it actually worked, though that bypasses LuCI and I guess, would be prone to breaking.
The 6rd.sh script
I used: Iproute2 – NETBOX IPv6 and IPv6 Address Calculator to make it
#!/usr/bin/env sh
set -e
IFNAME=test6rd
# CUSTOMER/PUBLIC_IP=100.X.X.10
if ip link show "$IFNAME" > /dev/null; then
echo "Cleaning up old link"
ip addr flush dev "$IFNAME"
ip -6 route flush dev "$IFNAME"
ip tunnel del "$IFNAME"
fi
sleep 1
echo "Setting up link"
ip tunnel add "$IFNAME" mode sit remote 46.39.165.39 ttl 64 \
&& ip link set dev "$IFNAME" mtu 1280 up \
&& ip -6 addr add 2a01:4240:64X:Xa::1/64 dev "$IFNAME" \
&& ip -6 route add ::/0 dev "$IFNAME"
So I went and tried setting it up thru LuCI, which turned out to be rather difficult, the interface was not coming up and this was repeated in messages
turris netifd: Interface 'wan6' is setting up now
turris netifd: wan6 (24264): Command failed: Unknown error
turris netifd: Interface 'wan6' is now down
Though when I changed the IPv6 Prefix Length from 64 to 32 it started working.
EDIT: Forgot to mention that this is happening on HBT as well as HBL where I am now (love the dark mode)
But, I guess due to that prefix, the interface is wrong
1675: 6rd-wan6@NONE: <NOARP,UP,LOWER_UP> mtu 1280 qdisc noqueue state UNKNOWN group default qlen 1000
link/sit 100.X.X.10 brd 0.0.0.0
inet6 2a01:4240:64X:Xa::1/32 scope global
valid_lft forever preferred_lft forever
inet6 ::64X:Xa/96 scope global
valid_lft forever preferred_lft forever
Which is completely different to what my script would produce on the omnia:
1677: test6rd@NONE: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1280 qdisc noqueue state UNKNOWN group default qlen 1000
link/sit 0.0.0.0 peer 46.39.165.39
inet6 2a01:4240:64X:Xa::1/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::c0a8:76/64 scope link
valid_lft forever preferred_lft forever
inet6 fe80::c0a8:101/64 scope link
valid_lft forever preferred_lft forever
Notice differences: there is POINTOPOINT, then this line is completely different link/sit 0.0.0.0 peer 46.39.165.39 and the 6rd address should be /64 instead of /32 and another address with my IPV4 as IPv6 suffix with /96.
Anyone knows what’s up with this?
Also I am not sure if I should be able to put 64 ipv6 prefix length into LuCI configuration of 6rd tunnel, tho it fails anyway so I guess not.
My /etc/config/network currently contains this, changing the ip6prefixlen to 64 will cause the errors I described on top.
config interface 'wan6'
option proto '6rd'
option peeraddr '46.39.165.39'
option ip6prefix '2A01:4240::'
option ip6prefixlen '32'
option ipaddr '100.X.X.10'
option peerdns '0'
option ttl '64'
option mtu '1280'
Pings error out with this:
root@turris:~# ping -6 example.com
PING example.com(2606:2800:220:1:248:1893:25c8:1946 (2606:2800:220:1:248:1893:25c8:1946)) 56 data bytes
From 2a01:4240::1 (2a01:4240::1) icmp_seq=1 Destination unreachable: Address unreachable
Any help greatly appreciated!