Hello Henry.
I was caught out by this with a home server running 18.04. The way you
configure networking has changed from that version to use a system
called Netplan (
https://netplan.io).
You'll need to create a .yaml file called "/etc/netplan/config.yaml" and
then run `sudo netplan apply` to set up the networking according to it.
See
https://netplan.io/examples for examples.
Thanks
Gavin
On 09/11/2018 14:40, Henry Gomersall wrote:
> Following an upgrade to Ubuntu 18.04, my network is not coming up
> properly. The interface seems to come up, but traffic is not being
> routed properly.
>
> Andy checked and he can ping my VPS some within Bitfolk, but from the
> machine I cannot see the outside world, nor can I see the machine from
> the outside world.
>
> /etc/network/interfaces is as below. Does anybody have any ideas as to
> what is wrong?
>
> #### BEGIN
> auto lo
> iface lo inet loopback
>
> auto eth0
> iface eth0 inet static
> address 85.119.83.128
> netmask 255.255.248.0
> gateway 85.119.80.1
>
> auto eth0:1
> iface eth0:1 inet static
> address 212.13.195.128
> netmask 255.255.255.255
>
> iface eth0 inet6 static
> auto lo
> iface lo inet loopback
>
> auto eth0
> iface eth0 inet static
> address 85.119.83.128
> netmask 255.255.248.0
> gateway 85.119.80.1
>
> auto eth0:1
> iface eth0:1 inet static
> address 212.13.195.128
> netmask 255.255.255.255
> address 2001:ba8:1f1:f1e5::2
> netmask 64
> gateway fe80::fcff:ffff:feff:ffff
> pre-up echo "/sbin/modprobe ipv6" &&
> /sbin/modprobe ipv6 || true
> post-up echo "/proc/sys/net/ipv6/conf/default/forwarding=0" &&
> echo 0 > /proc/sys/net/ipv6/conf/default/forwarding || true
> post-up echo "/proc/sys/net/ipv6/conf/all/forwarding=0" &&
> echo 0 > /proc/sys/net/ipv6/conf/all/forwarding || true
> post-up echo "/proc/sys/net/ipv6/conf/default/accept_ra=0" &&
> echo 0 > /proc/sys/net/ipv6/conf/default/accept_ra || true
> post-up echo "/proc/sys/net/ipv6/conf/all/accept_ra=0" &&
> echo 0 > /proc/sys/net/ipv6/conf/all/accept_ra || true
> post-up echo "/proc/sys/net/ipv6/conf/$IFACE/accept_ra=0" &&
> echo 0 > /proc/sys/net/ipv6/conf/$IFACE/accept_ra || true
> post-up echo "/proc/sys/net/ipv6/conf/default/autoconf=0" &&
> echo 0 > /proc/sys/net/ipv6/conf/default/autoconf || true
> post-up echo "/proc/sys/net/ipv6/conf/all/autoconf=0" &&
> echo 0 > /proc/sys/net/ipv6/conf/all/autoconf || true
> post-up echo "/proc/sys/net/ipv6/conf/$IFACE/autoconf=0" &&
> echo 0 > /proc/sys/net/ipv6/conf/$IFACE/autoconf || true
> #### END
>
>
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