Dell 3-DNS Informações Técnicas descarregar pdf (Página 4)

Migrating from Solaris 9 Enterprise Edition on Sun Fire V440 with BIND 8.3.3

to Solaris 10 Enterprise Edition on Dell PowerEdge R900 with BIND 9.3.5-P1

virtualization in Solaris. Containers combine Zones with Solaris 10’s

resource management capabilities.

Solaris Containers offer a convenient and secure way to consolidate

DNS servers, and even to securely consolidate DNS servers with

other services. For example, Mark Thacker, Group Product

Manager, Security & Virtualization at Sun, notes, “You could run

two different DNS servers, one in each Container. So, you could

have an internal DNS server and an external DNS Server running in

another Container. Each utilizing process rights management to

run with a reduced set of privileges.”

http://nettalk.sun.com/bhive/t/1000/chat_details.jsp?content_id=

1307

Because of the security benefits, you may want to consider running

DNS in a container, even if you are only planning a simple

migration.

DNS is highly configurable, and implementations vary greatly from

installation to installation. In this Guide, we have chosen a simple

and clear scenario. Where there were several ways of

accomplishing the same goal, we used the simplest method. For

example, instead of using file distribution utilities such as rdist, or

adding the new server as a slave name server and then promoting

it to be a master name server, we used simple file copies from

machine to machine.

Our scenario is that of replacing the old DNS server while keeping

the server name and IP address constant. This makes the new

server implementation transparent to client machines, as DNS

server name, IP addresses, etc. will remain the same. The main

configuration file for our example, the named.conf file, uses no

deprecated clauses. This allows us to move the DNS configuration

files unchanged.

NOTE: In this Guide, we use BIND 9.3.5-P1 because this

version of BIND ships with Solaris 10 10/08. The latest

version is 9.6.0, available at www.isc.org

. However, as

we write this Guide, Sun does not provide an installation

package for it.

"A DNS server … is a

core service that

needs to be isolated

in case it is

compromised and to

prevent something

else from bringing it

down.… With con-

tainers it is possible

to run DNS safely

with minimal services

that cannot be com-

promised by access to

other applications or

the applications

themselves.”

Consolidating

Applications with

Solaris Containers

http://www.sun.com/

datacenter/consolidati

on/solaris10_whitepa

per.pdf

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