On Tue, 10 Oct 2017 18:29:36 -0700
Howard Howell <hlhowell(a)pacbell.net> wrote:
What is this file:
When I do "# ls -al" it shows up as:
--w-------. 1 root root 4096 Oct 10 18:22 uevent
I have never seen a file with ONLY write permissions and root
ownership before. This would seem to be an error, or something left
over from debugging, unless it is an intrusion into my system.
Google didn't seem to know about it either.
For what it's worth, I also have that file on my system with the same
permissions. I think these files are created by the ebtables program.
What is ebtables?
The ebtables program is a filtering tool for a Linux-based bridging
firewall. It enables transparent filtering of network traffic passing
through a Linux bridge. The filtering possibilities are limited to link
layer filtering and some basic filtering on higher network layers.
Advanced logging, MAC DNAT/SNAT and brouter facilities are also
The ebtables tool can be combined with the other Linux filtering tools
(iptables, ip6tables and arptables) to make a bridging firewall that is
also capable of filtering these higher network layers. This is enabled
through the bridge-netfilter architecture which is a part of the
standard Linux kernel.
The ebtables and arptables codebase is maintained by the netfilter
developers, who were so kind to take over maintenance of the software.