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o5gmmob8
Guru
Joined: 17 Oct 2003
Posts: 583
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 Posted: Tue Mar 18, 2025 4:42 pm Post subject: [SOLVED] prevent more devices from being added via USB |
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How would I lock down USB such that after all the devices are plugged in, I can prevent new ones from being added? I would want to prevent any additional kernel modules from being loaded. Would I control that via udev?
I don't want to unload USB entirely, but I'm sure that would work while at the same time, whatever is connected, wouldn't.
EDIT:
I came across this in an old system configuration I had many years ago:
| Code: | # by default, do NOT authorize USB devices
for d in $(ls /sys/bus/usb/devices/ | grep "usb.*")
do
echo 0 > /sys/bus/usb/devices/$d/authorized_default
done |
Unforrtunately, I'm not seeing any sort of authorized file.
Last edited by o5gmmob8 on Tue Mar 18, 2025 6:58 pm; edited 1 time in total |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 55179
Location: 56N 3W
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| Posted: Tue Mar 18, 2025 6:22 pm Post subject: |
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o5gmmob8,
| Code: | $ ls -l /sys/bus/usb/devices/usb1/
total 0
drwxr-xr-x 10 root root 0 Mar 18 18:15 1-0:1.0
drwxr-xr-x 7 root root 0 Mar 18 18:19 1-4
drwxr-xr-x 6 root root 0 Mar 18 18:15 1-5
-rw-r--r-- 1 root root 4096 Mar 18 18:16 authorized
-rw-r--r-- 1 root root 4096 Mar 18 18:16 authorized_default
... |
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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o5gmmob8
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Joined: 17 Oct 2003
Posts: 583
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| Posted: Tue Mar 18, 2025 6:58 pm Post subject: |
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| Oh, yes, you're right, hmm, I need to play around more with find then. |
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