[lug] DNS Time

[Jeffrey B. Siegal]

"Shannon M. Johnston" wrote:
> How do I reduce the TTL time?

The default TTL for the domain is in the SOA record.  Mine looks like this:

@                       IN      SOA     lx.quiotix.com. root.lx.quiotix.com. (
                                1999061903      ;Serial
                                86400           ;Refresh
                                3600            ;Retry
                                3600000         ;Expire
                                172800)         ;Minimum
                                IN      NS      lx.quiotix.com.
                                IN      NS      ns.brainstorm.net.
                                IN      NS      lambda.lambdatel.com.
                                IN      NS      ns2.brainstorm.net.

The "Minimum" (poorly named) sets the TTL (in seconds) for all records in the
domain that don't have one.  If you want to change the TTL for just a single
record, I think you just add it to that line after the name:

For example, change 

    jeff-pc            IN      A       199.164.185.8
 
to

    jeff-pc  300       IN      A       199.164.185.8


I'm not 100% sure this is right though.  Check the bind documentation or try
it and see.  After making any changes to your zone files, do a "killall -HUP
named" 

You can check the TTL on records using "dig":

--->
[jbs at lx Downloads]$ dig jeff-pc.quiotix.com

; <<>> DiG 8.2 <<>> jeff-pc.quiotix.com
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 4
;; QUERY SECTION:
;;      jeff-pc.quiotix.com, type = A, class = IN

;; ANSWER SECTION:
jeff-pc.quiotix.com.    2D IN A         199.164.185.8
<---

Hope this helps.