dns reverse lookup

[newbobbys9]

When I started at my new position,I found that DNS was configured without any reverse lookup. What impact does that have upon our network? Any help is appreciated. Thanks.

 

[Cstorms]

Reverse lookup zones are their to turn IPs into their respective name

If for example you do a nslookup and it returns nothing its because of the lack of a ptr record that it uses to turn the NS record into the name that it would have dynamically registered (or you manually entered).

Not having this is generally nothing to worry about unless you run into problems with specialized apps or what not to convert these queries.


Cory

 

[newbobbys9]

Thanks Cory,

I know what reverse lookup does, but my concern relates to whether the absence of this zone would contribute to arp traffic on our network. Thanks.

 

[brianinms]

ARP is mac address to ip address, how does that correspond to ip address to name?

 

[newbobbys9]

My bad! You are right brianinms. But my question should have referenced port 53 traffic if no in-addr-arpa zone is configured. We are trying to run high schools through a small wan pipe and the dns is across the wan. I have the concern that not having this configured may contribl;ute to broadcast traffic on the local subnet.