linux-kernel - Re: can I receive UDP broadcasts in aliases interfaces?

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Message-ID: <alpine.LNX.1.10.0805061029190.16731@fbirervta.pbzchgretzou.qr>
Date:	Tue, 6 May 2008 10:30:27 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...ozas.de>
To:	Pau Aliagas <linuxnow@...tral.org>
cc:	lkml <linux-kernel@...r.kernel.org>
Subject: Re: can I receive UDP broadcasts in aliases interfaces?


On Tuesday 2008-04-29 00:27, Pau Aliagas wrote:
>
> I'm trying to use aliased interfaces to run multiple instances of a
> process that receives UDP broadcasts; I want to test all in a
> single computer when I have no access to the network.
>
> My problem is that I can bind to the virtual interface ip to send
> and receive packets, but I don't receive udp broadcasts. I have no
> firewall rules that block it and udp bcasts are generated from the
> same computer too.
>
> Is there any sysctl param I need to change? I'm usre this can be
> done but I haven't found how.

Hm, set a proper broadcast address on the address? E.g.

	ip addr add 192.168.0.137/24 brd + dev eth0
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