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Date: Tue, 10 Jan 2017 15:24:16 +0100
Message-ID: <86o9zft2lr.wl-herbert@mailbox.org>
From: "Herbert J. Skuhra" <herbert@mailbox.org>
To: freebsd-questions@FreeBSD.org
Subject: Re: /dev/bpf in a jail
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Ernie Luzar skrev:
> 
> I trying to run tcpdump inside of a jail.
> Get following error message
> tcpdump: (cannot open device) /dev/bpf: No such file or directory
> 
> Is it technical possible to do this?

http://lmgtfy.com/?q=jail+bpf

Second link:

Solved - tcpdump not working in jails | The FreeBSD Forums
https://forums.freebsd.org/threads/49380/ 

Read the full thread! Hint: security

--
Herbert