linux - How can I override TTL of an Internet Address?

I'm running a caching DNS server currently to improve latency in a network.

The question is: can I override the TTL I get from a server using BIND9 or other software on Linux?

short "dig www.google.com" here:

; <<>> DiG 9.6.1-P2 <<>> www.google.com

;; ANSWER SECTION:
www.google.com. 604441 IN CNAME www.l.google.com.
www.l.google.com. 300 IN A 74.125.45.147

Can I change that '300' into 15 minutes?

Thanks you so much for your time!!.

Answer

the DIRTIEST most ugliest thing that can be done is...

1-Downloading the source
2-find the file called cache.c
3-find the function is_expired

4- Change it in this way

static int is_expired(time_t now, struct crec *crecp)
{

  if (crecp->flags & F_IMMORTAL)
    return 0;

  if (difftime(now, crecp->ttd) < 0)
    return 0;

  return 0; // IT WAS IN ONE
}

When the function ask did expire? we always saw no

In this way it will never expire and you will conquer the world.

OUTPUT:

; <<>> DiG 9.6.1-P2 <<>> www.google.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28477

;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.google.com.            IN  A

;; ANSWER SECTION:
www.google.com.     603937  IN  CNAME   www.l.google.com.
www.l.google.com.   4294966733 IN   A   209.85.195.99
www.l.google.com.   4294966733 IN   A   209.85.195.104
www.l.google.com.   4294966733 IN   A   209.85.195.147


;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Feb 17 18:34:47 2010
;; MSG SIZE  rcvd: 110