Permission Denied error 13

[Alexaandre]

Hi, as i tried to install this tool on macos, i've not find any instruction to get it working on macos. i tried to install it on a VM on my macos, wg tunnel is OK between peers, i can ping the server everything's fine until i try the server script. I created a venv, then installed the script inside the venv, then run the cmd as described on the topic, then, wg client connects to server, then server crash when changing MTU with permission denied error . Tryed to chmod 777 /etc/wireguard/wg0.conf but no luck . I want the server to stay on MTU 1420 .

WG server 10.0.0.1/24 -> ubuntu WG peer 10.0.0.3/24 -> ubuntu

(WG) alexandre@wg-srv-ubuntu:~$ nr-wg-mtu-finder --mode server --mtu-min 1420 --mtu-max 1420 --mtu-step 2 --server-ip 10.0.0.1

• Serving Flask app 'nr_wg_mtu_finder.sync_server' (lazy loading)
• Environment: production WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
• Debug mode: off
• Running on http://10.0.0.1:5000/ (Press CTRL+C to quit) RECEIVED REQUEST /peer/ready 10.0.0.3 - - [16/Oct/2023 22:52:55] "GET /peer/ready HTTP/1.1" 200 - RECEIVED REQUEST /server/status 10.0.0.3 - - [16/Oct/2023 22:52:55] "GET /server/status HTTP/1.1" 200 - WG Interface Down : SUCCESS Traceback (most recent call last): File "/home/alexandre/WG/bin/nr-wg-mtu-finder", line 8, in sys.exit(run()) File "/home/alexandre/WG/lib/python3.8/site-packages/nr_wg_mtu_finder/main.py", line 140, in run MTUFinder(**args.dict()) File "/home/alexandre/WG/lib/python3.8/site-packages/nr_wg_mtu_finder/mtu_finder.py", line 58, in init self.run_server_mode() File "/home/alexandre/WG/lib/python3.8/site-packages/nr_wg_mtu_finder/mtu_finder.py", line 456, in run_server_mode self.update_mtu_in_conf_file() File "/home/alexandre/WG/lib/python3.8/site-packages/nr_wg_mtu_finder/mtu_finder.py", line 168, in update_mtu_in_conf_file self.validate_conf_file() File "/home/alexandre/WG/lib/python3.8/site-packages/nr_wg_mtu_finder/mtu_finder.py", line 151, in validate_conf_file with open(self.conf_file, "r") as f: PermissionError: [Errno 13] Permission denied: '/etc/wireguard/wg0.conf'

do you have an idea ?

[nitred]

@Alexaandre The scripts are meant to be run as a root user or with sudo. This is a security risk for sure. Please go through the code base to check to see if you're comfortable doing that.

You could do the following:

# First obtain the path of the nr-wg-mtu-finder binary
$ which nr-wg-mtu-finder
/path/to/nr-wg-mtu-finder

# Then run the command using sudo
$ sudo /path/to/nr-wg-mtu-finder --mode server --mtu-min 1420 --mtu-max 1420 --mtu-step 2 --server-ip 10.0.0.1

[Alexaandre]

Hi @nitred, thanks for the reply, unfortunatelly, it was late in the night yesterday when i wrote this, i realized right after that the script has to run under sudo argument. i used $ mkdir wg-srv then $ python3 -m venv wg-srv/n then $ source wg-srv/bin/ativate then (wg-srv) $ sudo pip install nr-wg-mtu-finder==0.2.1 --upgrade, installed it .

I dont know if this this is recommended to use sudo on venv but its was to test the script and it worked, i set up 2 VMs for the occasion as i have no idea how to install it on mac-osx : when i try to install it on a venv using python3, i have an error with wheel buildind .