RE: ifup && iptables error

[Bonno Bloksma <b.bloksma@tio.nl>]

Hi,

[....]
> Right, your basic problem is that your interfaces are now names
> enp7s0
> and
> wlp6s0
>
> not eth0 and wifi0 or whatever they used to be.
>
> Fix them in /etc/network/interfaces, double check your iptables rules 
> are either using the new names or don't mention interfaces at all, and 
> you should be relatively happy.

I was going to say or....
Edit the file /etc/udev/rules. d/70-persistent-net and change the "stange names" back to their "proper name" but .....
It seems that even though the /etc/udev/rules.d/ directory still exists, it is empty, no 70-persistent-net file present.
See https://wiki.debian.org/NetworkInterfaceNames why and how to get another set of predictable names like lan0 if you want that.

Bonno Bloksma