Subj : Re: Networking Questions To : acn From : Avon Date : Fri Jun 18 2021 08:55 pm On 18 Jun 2021 at 10:15a, acn pondered and said... ac> Hallo Avon, Hi, and thanks for the reply :) ac> First, if you prefer "eth0" over "enp4sdfsd523", you can change this ac> behaviour in the kernel commandline by adding these parameters: ac> net.ifnames=0 biosdevname=0 I don't know how/where to do that in debian 10 sorry ac> The enps432 devices get its name during bootup with the intention to be ac> predictible, so that eth0 won't be eth1 on the next boot. I don't mind using the name defined on boot, it's just getting it talking to my rpi that's running the he.net tunnel that I think?? is the issue. ac> On my BBS machine, I use the following lines in /etc/network/interfaces: ac> ac> ==== cut here for new monitor ==== ac> auto lo ac> iface lo inet loopback ac> ac> auto eth0 ac> iface eth0 inet static ac> address 192.168.14.85 ac> netmask 255.255.255.0 ac> gateway 192.168.14.1 ac> dns-search narnia.lan ac> dns-nameservers 192.168.14.5 192.168.14.1 ac> ac> iface eth0 inet6 static ac> privext 0 ac> address 2001:470:540b::f1d0:2:240:5824/64 At the moment I have left mine as source /etc/network/interfaces.d/* # The loopback network interface auto lo iface lo inet loopback # some test settings to set ipv4 # auto eth0 # iface eth0 inet static # address 192.168.1.131 # netmask 225.255.255.0 # gateway 192.168.1.254 # some test settings to set ipv6 # iface eth0 inet6 static # address 2001:470:c:123::200 # netmask 64 # gateway 2001:470:c:123::5 you can see my commented out attempts... ac> This results in this "ip a" output for eth0: Mine is avon@orac:/$ ip a 1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp4s0: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 1c:6f:65:d7:70:04 brd ff:ff:ff:ff:ff:ff inet 192.168.1.131/24 brd 192.168.1.255 scope global noprefixroute enp4s0 valid_lft forever preferred_lft forever inet6 2001:470:c:123::200/64 scope global valid_lft forever preferred_lft forever inet6 fe80::1e6f:65ff:fed7:7004/64 scope link noprefixroute valid_lft forever preferred_lft forever ac> I just noticed that in your "ip a" output, your inet6 entries have the ac> option "noprefixroute" set. ac> As far as I understand it, this means that no default route for this ac> address has been (automatically) added. This I think is my problem, and I've been trying to google and test possible fixes all night, but so far no joy. ac> So, if your problem persists, try looking at your IPv6 routing table ac> using "route -n6" and search for your IPv6 default route, in my case it Here's mine avon@orac:/$ sudo route -n6 Kernel IPv6 routing table Destination Next Hop Flag Met Ref Use If ::1/128 :: U 256 2 0 lo 2001:470:c:123::/64 :: U 100 2 0 enp4s0 2001:470:c:123::/64 :: U 256 1 0 enp4s0 fe80::/64 :: U 100 1 0 enp4s0 ::/0 2001:470:c:123::5 UG 100 5 0 enp4s0 ::1/128 :: Un 0 7 0 lo 2001:470:c:123::200/128 :: Un 0 5 0 enp4s0 fe80::1e6f:65ff:fed7:7004/128 :: Un 0 3 0 enp4s0 ff00::/8 :: U 256 6 0 enp4s0 ::/0 :: !n -1 1 0 lo ac> ::/0 fe80::464e:6dff:fe22:35c UGDAe 1024 2 0 eth0 ::/0 2001:470:c:123::5 UG 100 5 0 enp4s0 perhaps something is amiss here? ac> How are you advertising your prefix in your LAN? It's using Radvd on my Rpi which is on the LAN and is set up as the end point for the he.net tunnel. ac> In my case, my tunnel endpoint is on my DSL router (AVM FritzBox) and ac> "router advertisement" is active here. Rpi for me. in all my mucking about I must have once found a way for the debian box to see the Rpi as it did pick up a dynamic IPv6 once and I could ping that from outside my LAN... stuffed if I recall how now :( ac> As far as I know, via router advertisement also the default gateway can ac> be sent to the clients. Is this configured? Don't know it's been years since I set the Pi up... the windows boxes work fine I am cautious about touching the pi gateway/endpoint of the tunnel. ac> I hope that helps you a little. It does :) --- Mystic BBS v1.12 A46 2020/08/26 (Linux/64) * Origin: Agency BBS | Dunedin, New Zealand | agency.bbs.nz (21:1/101) .