POLICY REDIRECTION

[fooler]

hi all,

    having multiple network access point (NAP) branch and each NAP had
their own proxy server named proxy.nap1.abc.com, proxy.nap2.abc.com,
proxy.nap3.abc.com and so on and so forth.
    i want to centralize and standardize all proxy settings in their browser
into proxy.abc.com, whenever where NAP they are, the proxy.abc.com will
return the nearest proxy server ip address. for example, when im in  nap3,
my proxy.abc.com ip address will point to proxy.nap3.abc.com.
    are there any BIND features for this? or any sugggestion what DNS daemon
support this.

    if BIND doesn't support this, can we add another column in the IN A
record with the following format:

for example:

proxy ip addresses for every NAP
nap1 = 10.0.1.1
nap2 = 10.0.2.1
nap3 = 10.0.3.1
default proxy.abc.com ip address is 10.0.0.1

proxy.abc.com     IN    A    10.0.0.1
proxy.abc.com.    IN    A    10.0.1.1    SUBNET 10.0.1.0 MASK 255.0.0.0
proxy.abc.com     IN    A    10.0.2.1    SUBNET 10.0.2.0 MASK 255.0.0.0
proxy.abc.com     IN    A    10.0.3.1    SUBNET 10.0.3.0 MASK 255.0.0.0

so that when a requesting dns client with a ip source address belongs to a
subnet of 10.0.2.0, it will return proxy.abc.com ip address to 10.0.2.1
if there are no matching subnet of dns client ip source address, it will
return the default 10.0.0.1 of proxy.abc.com.

fooler.