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Re: [Qemu-devel] [PATCH] Slirp reverse UDP firewall

From: Daisuke Nojiri
Subject: Re: [Qemu-devel] [PATCH] Slirp reverse UDP firewall
Date: Wed, 13 Apr 2011 08:35:51 -0700

Thanks, Jan. I split my patch into three and started a new thread. I also put all options in -net user. Yes, TCP firewall is coming. You'll see some of the added functions will be shared.


On Tue, Apr 12, 2011 at 9:38 AM, Jan Kiszka <address@hidden> wrote:
On 2011-04-12 18:19, Daisuke Nojiri wrote:
> This patch adds: -drop-udp, -allow-udp ADDR:PORT, -drop-log FILE
>   e.g.) $ qemu -net user -drop-log qemu.drop -drop-udp -allow-udp

No more stand-alone slirp arguments please. That syntax breaks when
instantiating >1 back-ends.

> -drop-udp enables usermode firewall for out-going UDP packats from a guest.
> All UDP packets except ones allowed by -allow-udp will be dropped. Dropped
> packets are logged in the file specified by FILE. PORT can be a single
> number
> (e.g. 53) or a range (e.g. [80-81]). If ADDR is ommitted, all addresses
> match
> the rule.

Will we see a TCP firewall as well? Can we prepare for a more generic
infrastructure, or what makes UDP special?

Also, please break up in smaller bits (example: logging would be a
separate topic). And make sure that your patches aren't line-wrapped.


Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux

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