How to block IP range
Gary Palmer
gpalmer at freebsd.org
Mon Oct 27 16:53:29 UTC 2014
On Mon, Oct 27, 2014 at 04:37:19PM +0000, Spenst, Aleksej wrote:
> Hi Cris, Gary,
>
> Thank you!
>
> Will this generate 100 separate rules or just one rule?
Hi,
One rule.
> If only one rule, how the number of IP addresses in the range influences the performance of pf?
Probably, although I haven't tested that.
See my later e-mail for a set of CIDR ranges that may work better.
> > sh -c 'for ip in `jot 100 1 100`; do echo 10.0.0.$ip >> /etc/pf/blocked_hosts.table; done'
>
> is it a typo? I got the error: "sh: jot: cannot execute - No such file or directory"
Works for me. Do you have /usr/bin/jot? It exists on FreeBSD boxes but
may not on Linux.
Regards,
Gary
>
> Thanks,
> Aleksej.
>
>
> -----Urspr??ngliche Nachricht-----
> Von: Cristiano Deana [mailto:cristiano.deana at gmail.com]
> Gesendet: Montag, 27. Oktober 2014 17:31
> An: Gary Palmer
> Cc: Spenst, Aleksej; freebsd-pf at freebsd.org
> Betreff: Re: How to block IP range
>
> On Mon, Oct 27, 2014 at 5:24 PM, Gary Palmer <gpalmer at freebsd.org> wrote:
>
> Hi
>
> >> For example, I need to block only 100 IPs in the range:
> >> 10.0.0.1-10.0.0.100
>
> > tables?
> >
> > you can do things like
> >
> > table <blocked_hosts> persist file "/etc/pf/blocked_hosts.table"
> > block in quick log on $ext_if_ipv4 from <blocked_hosts> to any
>
> I'm adding the fast way to build the file:
>
> sh -c 'for ip in `jot 100 1 100`; do echo 10.0.0.$ip >> /etc/pf/blocked_hosts.table; done'
>
>
> --
> Cris, member of G.U.F.I
> Italian FreeBSD User Group
> http://www.gufi.org/
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