i want to allow the use of /usr/sbin/ufw for a special user.

But only for a given command:

in my /etc/sudoers file i have now (for blocking IPv4 addresses):

blockuser   ALL=NOPASSWD: /usr/sbin/ufw deny from [0-9\.]* to any

But when i try to execute the command i get an:

/etc/sudoers: syntax error near line 27

error (which is the line i posted before).

So my question, is it possible to work with such a placeholders in sudo?

  • Seems: /usr/sbin/ufw deny from [0-9]*[0-9]*[0-9]*[0-9]* to any is working Dec 18, 2014 at 14:31

1 Answer 1


sudo is not using regular expression, it is using standard shell glob patterns.

So for blocking an IPv4 address you must use:

blockuser   ALL=NOPASSWD:/usr/sbin/ufw deny from [0-9]*[0-9]*[0-9]*[0-9]* to any

\. is not allowed

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