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
> --
> To unsubscribe from this list: send the line "unsubscribe netfilter" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=541AF628.8090509@sterenborg.org \
--to=lists@sterenborg.org \
--cc=l.p.dam@amity.nl \
--cc=netfilter@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.