Re: hoststated udp + dns relay / loadbalancer code

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02-18-2008, 09:32 AM

Timo Schoeler

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Re: hoststated udp + dns relay / loadbalancer code

Thus Reyk Floeter <reyk@openbsd.org> spake on Wed, 5 Sep 2007 12:45:48
+0200:

> hi,
>
> this code adds support for dns relaying/loadbalancing and a general
> udp interface for hoststated relay.
>
> there has been some discussion about dns loadbalancing on misc in the
> past. i know that it is probably better to use normal caches, servers,
> anycast and the dns "p2p" network, but i implemented dns support in
> hoststated to start with udp. because of the stateless nature of udp,
> it is not possible to write a generic udp handler, the daemon needs to
> look for state information in the application layer protocol itself
> which is very simple with dns. a fancy cookie is that it replaces the
> dns request id with random values (like the scrub random-id).
>
> it is still some kind of experimental... please test!
>
> reyk

Thanks a lot, Reyk! If time allows, I'll try to set it up here in our
company network this week or next week.

Kudos to Reyk -- he's doing a great job!

Cheers,

Timo (<- who runs enough DNS servers but is really fascinated by
hoststated supporting load balancing for DNS

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Re: hoststated udp + dns relay / loadbalancer code