Toss something like this for each interface into /etc/udev/rules.d/10-interface-names.rules
SUBSYSTEM=="net", ACTION=="add",ATTR{address}=="00:25:90:80:2e:a4", NAME="1gig1" Replace the mac address with the one your interface has. -Ed -----Original Message----- From: Mark Neidorff <m...@neidorff.com> Sent: Wednesday, August 1, 2018 12:01 PM To: debian-user@lists.debian.org Subject: Specifying multiple NICs I'm setting up a "just in case" replacement mailserver for my domain and my local network. I'm using Debian Jessie, because the latest instructions for setting the mailserver (qmail) are written for Jessie. The mailserver has 2 NICs (one for local network, and one for Internet). In the past, I referred to each NIC as eth0, eth1,..... but now, these names are not permanent, and the designation can change on boot. I looked at the "Network Coinfiguration" document which didn't have a solution. So, either how do I make the names for the NICs permanent or what do I use fot the names of the NICs? Thanks, Mark -- If you finding the going easy, you're probably going downhill.