From: "R. Sterenborg (lists)" <lists@sterenborg.org>
To: Lars Dam <l.p.dam@amity.nl>,
"'netfilter@vger.kernel.org'" <netfilter@vger.kernel.org>
Subject: Re: Can IPTables check for a valid IP address
Date: Thu, 18 Sep 2014 17:11:36 +0200 [thread overview]
Message-ID: <541AF628.8090509@sterenborg.org> (raw)
In-Reply-To: <D4669F1AE5CE3D4293C4658A698E502904B637068E4C@SELENIUM.amity.local>
On 09/18/2014 03:50 PM, Lars Dam wrote:
> We suffer from DNS lookups with a response IP address which is not existing.
>
> Can Iptables check on this?
What is it you actually want iptables to do? Do you want it to check if
the IP address that the DNS server responds with exists and is in use?
Or..? Maybe the DNS server should be fixed instead of trying to go this way.
Iptables (well, Netfilter) is a packet filter. You can filter packets
that match a rule that you define. It can't validate your DNS server's
output.
--
Rob
> Regards,
>
> Lars Dam
> Manager ICT services
> --
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next prev parent reply other threads:[~2014-09-18 15:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-18 13:50 Can IPTables check for a valid IP address Lars Dam
2014-09-18 15:11 ` R. Sterenborg (lists) [this message]
2014-09-18 15:19 ` Lars Dam
2014-09-18 15:31 ` Michael Schwartzkopff
2014-09-18 15:53 ` FW: " Lars Dam
2014-09-18 16:29 ` Noel Kuntze
2014-09-18 17:48 ` Lars Dam
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