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List: netbsd-tech-net
Subject: Re: ipf race (was: Flag to exclude an interface from INADDR_ANY?)
From: Darren Reed <darrenr () reed ! wattle ! id ! au>
Date: 2002-01-02 21:42:22
[Download RAW message or body]
In some email I received from Wolfgang Rupprecht, sie wrote:
>
> > configuring ipf to block all services invisibly on the outside
> > interface(s) is both error-prone and subject to both race conditions
>
> Is it possible to eliminate the race condition by swapping filters as such:
>
> ipf -I -F a -f /etc/ipf.conf
> ipf -I -6 -f /etc/ipf-v6.conf
> ipf -s
>
> Or does the "ipf -s" have a small race condition of its own? If so,
> I'm going to have to rethink how I reload filters. (eg. perhaps something
> along the lines of ifconfig down, reload, ifconfig up)
There is no race condition there.
Darren
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