[okdana]

How are you going to white-list network-interface names? On Linux at least you can name them almost anything you want:

  % sudo ip link set eth3 down
  % sudo ip link set eth3 name "'deal-with-it'"
  % sudo ip link show "'deal-with-it'"
  5: 'deal-with-it': <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 10000
      link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff

The only interface-name restrictions iproute2 sets is that they can't contain NUL, slash, or white space, and they can't be longer than 15 characters.

[tedunangst]

So I guess the question is does a regex of [^/ ]{1,15} count as a whitelist or a blacklist?

[amluto]

So does Linux allow .. as an interface name? If so, that’s nuts.