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From Mario Brandt <>
Subject Re: access control for dynamic hosts
Date Thu, 14 Jan 2016 09:07:34 GMT
Hi Fabien,

doesn't it work using Require host with a dyndns name? At least my
test was successful.


On 20 December 2015 at 09:44, Fabien <> wrote:
> Hello folks,
> I have a simple access control use case for which I have not found a clean
> solution.
> I want to control access to a service based on the name of the client,
> however the client is a dynamic host, which implies that:
>  (1) I do not have any control about the reverse DNS
>      => this rules out "Require host"
>  (2) the IP may change arbitrarily
>      => this rules out "Require ip"
> By browsing around it seems that I'm not alone having this issue, and I have
> not found any solution for that with apache configuration, nor a matching
> module in "" listing.
> The current workaround is to update the IP manually when it fails. Although
> I could automate (say query the ip periodically and update & reload the conf
> if there is a change), ISTM that it really belongs to apache configuration.
> I would like something like "Require XXX foo.dynamic-dns.somewhere" (where
> XXX could be "name", "hostname", "dynamic", ...) which would query the NS
> when the HTTP request is received and check that the corresponding ip is the
> client IP.
> I'm planing to develop a small module for that, and as it is somehow quite a
> basic service it could be a candidate for being added to
> "modules/aaa/mod_authz_host.c".
> Another approach could be to extend apache expressions with a function
> to query the DNS, but that seems a little overkill.
> Any thoughts?
> --
> Fabien.

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