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Re: [Q]Send certain packet to *ALL* real server

To: "Joseph Mack" <mack@xxxxxxxxxxx>, "Brian Edmonds" <bedmonds@xxxxxxxxxxx>
Subject: Re: [Q]Send certain packet to *ALL* real server
Cc: <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
From: "Ted Pavlic" <tpavlic@xxxxxxxxxxx>
Date: Fri, 28 Jul 2000 16:27:34 -0400
> I take it just having the DNS on the real-servers as secondaries to the
> master machine independant of the LVS just doesn't fly?
> I don't know how NOTIFY works. How does a primary machine NOTIFY
> secondaries? From what I know from setting them up, the primaries don't
> push, they respond to requests.

The primary servers do send notifies to the authoritative secondary servers
(i.e., all of the NS records in a domain).

The notifies don't push information, they simply tell the secondaries that
it is time to pull information for domain-X. They basically force the
authoritative secondaries to do a zone transfer before their zone
information has expired.

It would be useful to be able to send one notify to all servers at one time
thus causing all of them to go and pull all of their information
immediately...

BUT... I'm not quite sure how RFC it is to have DNS behind an LVS. Any
thoughts on this?

However -- I'm sure there are other uses for having the ability to send a
packet to all real servers at once... I just can't think of any right now...
<?>

Personally I don't know if it would be worth the hassle. And I think I'd be
worried about security... that is -- I'd be worried that someone could flood
all of my real servers at once. That wouldn't be cool.



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