Locking down specific nmcli actions

Going through Lab 35.1, it occurred to me that on my system at least (CentOS 7), the ability to take down an interface etc. is not restricted in any way - i.e. any normal user is able to take a network connection down, etc.
From what I can tell, creating a rule using polkit would be the way to go to modify this behaviour. Before I potentially jump down a rabbit hole, I was wondering if anyone had come across a better\simpler way of doing this?
Cheers
Comments
-
I've never seen such behaviour on CentOS 7 as far as Ethernet connections go. For wireless it is likely it is set up so that when you go into a cafe and want to hook up to the free wifi you don't need to be root.
It may be possible to configure a system this way but if you try to run a command to bring down a wired interface you should see something like:
c8:/tmp>ifconfig eno1 down SIOCSIFFLAGS: Operation not permitted
0 -
I was only seeing this behaviour directly on the console, i.e. ttyx when running
nmcli con down eth0
- over ssh I was getting a 'deactivation failed' message as you'd expect. I'm running a minimal install of Centos 7, so maybe that doesn't have the same set of rules as a server install would.I played around with it last night and managed to cobble together a polkit rule that disabled a normal user from doing this on tty, that seems to have worked ok.
Cheers
1 -
Hi @dacarab ,
I have a complete CentOS 7 18 desktop, and I also was able to disable an interface using "nmcli" as a non-privileged user. I haven't noticed this before. But now that I think about this, I think it's normal, as any user can disable and enable again an interface from the Network Manager configuration tool (you can do that on Settings in the GUI).
Many regards,
Luis.0
Categories
- All Categories
- 51 LFX Mentorship
- 104 LFX Mentorship: Linux Kernel
- 576 Linux Foundation IT Professional Programs
- 304 Cloud Engineer IT Professional Program
- 125 Advanced Cloud Engineer IT Professional Program
- 53 DevOps Engineer IT Professional Program
- 61 Cloud Native Developer IT Professional Program
- 5 Express Training Courses
- 5 Express Courses - Discussion Forum
- 2.1K Training Courses
- 19 LFC110 Class Forum
- 7 LFC131 Class Forum
- 27 LFD102 Class Forum
- 158 LFD103 Class Forum
- 21 LFD121 Class Forum
- 1 LFD137 Class Forum
- 61 LFD201 Class Forum
- 1 LFD210 Class Forum
- LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum
- LFD237 Class Forum
- 23 LFD254 Class Forum
- 613 LFD259 Class Forum
- 105 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 1 LFD273 Class Forum
- 2 LFS145 Class Forum
- 25 LFS200 Class Forum
- 739 LFS201 Class Forum
- 1 LFS201-JP クラス フォーラム
- 11 LFS203 Class Forum
- 77 LFS207 Class Forum
- 300 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 37 LFS243 Class Forum
- 11 LFS244 Class Forum
- 37 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 141 LFS253 Class Forum
- LFS254 Class Forum
- 1.1K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 93 LFS260 Class Forum
- 132 LFS261 Class Forum
- 33 LFS262 Class Forum
- 80 LFS263 Class Forum
- 15 LFS264 Class Forum
- 11 LFS266 Class Forum
- 18 LFS267 Class Forum
- 18 LFS268 Class Forum
- 23 LFS269 Class Forum
- 203 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- LFS281 Class Forum
- 236 LFW211 Class Forum
- 172 LFW212 Class Forum
- 7 SKF100 Class Forum
- SKF200 Class Forum
- 903 Hardware
- 219 Drivers
- 74 I/O Devices
- 44 Monitors
- 116 Multimedia
- 209 Networking
- 101 Printers & Scanners
- 85 Storage
- 763 Linux Distributions
- 88 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 24 openSUSE
- 142 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 357 Ubuntu
- 479 Linux System Administration
- 41 Cloud Computing
- 70 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 78 Network Management
- 108 System Management
- 49 Web Management
- 68 Mobile Computing
- 23 Android
- 30 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 538 Off Topic
- 131 Introductions
- 217 Small Talk
- 22 Study Material
- 826 Programming and Development
- 278 Kernel Development
- 514 Software Development
- 928 Software
- 260 Applications
- 184 Command Line
- 3 Compiling/Installing
- 76 Games
- 316 Installation
- 61 All In Program
- 61 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)