On 28/9/24 06:42, Andy Smith wrote:
Hi,
Here is a manual network setup I have created by use of the "ip"
command:
$ ip address show dev enX0
2: enX0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group
default qlen 1000
link/ether 00:16:5e:00:02:39 brd ff:ff:ff:ff:ff:ff
inet 85.119.82.225/32 scope global enX0
valid_lft forever preferred_lft forever
inet6 2001:ba8:1f1:f1d7::2/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::216:5eff:fe00:239/64 scope link
valid_lft forever preferred_lft forever
$ ip route show
default via inet6 fe80::1 dev enX0 src 85.119.82.225
$ ip -6 route show
2001:ba8:1f1:f1d7::/64 dev enX0 proto kernel metric 256 pref medium
fe80::/64 dev enX0 proto kernel metric 256 pref medium
default via fe80::1 dev enX0 metric 1024 pref medium
Note that it has a single global scope IPv4 address which is a /32, and
its IPv4 default route is via an IPv6 link-local address.
This works fine, however I had to configure it using the "ip" command:
# ip address add 85.119.82.225/32 dev enX0
# ip -4 route add default via inet6 fe80::1 src 85.119.82.225
Is it possible to configure that using ifupdown's
/etc/network/interfaces syntax?
If there's no actual syntax for this (particularly, the "gateway" option
says it expects a dotted quad) possibly it can be done with pre-up
commands?
Is it doable with any of the other network configuration frameworks
(systemd-networkd, NetworkManager, netplan, …)?
Thanks,
Andy
In regard to systemd-networkd and likely all other choices it probably
won't work.
You would be better off using iptables or nftables to NAT the IPv4 to
IPv6 and route that instead.
