Configuring Absolute minimum TTL in BIND-8.4.7

3 msg	Slave DNS server not taking over.
4 msg	TLD wildcard doesn't always work
20 msg	bind replication between sites
2 msg	Least expensive, most robust infrastructure
4 msg	include files in named.conf.local
2 msg	Newbie: Multiple Domains
20 msg	Host = domain
2 msg	Unexpected Token? SERVFAIL?
2 msg	BIND 9.3.2 and Solaris 10 zones

Configuring Absolute minimum TTL in BIND-8.4.7
\ Stefan Schoeman (18 Jul 2006)
. \ Barry Margolin (18 Jul 2006)
. \ Stefan Schoeman (18 Jul 2006)

13 msg	building a DNS system
2 msg	Dynamic Reverse Configuration
3 msg	Resolve single word names?
9 msg	How to override an A record
8 msg	Round-robin for high availability?
8 msg	Cache poisoning
7 msg	Strange / Frustrating Caching Problems
8 msg	Name Servers
4 msg	Why is slave zone different from master zone..?
1 msg	Bind - named exiting (due to assertion failure)

Subject:	Configuring Absolute minimum TTL in BIND-8.4.7
Group:	Bind-users
From:	Stefan Schoeman
Date:	18 Jul 2006

Hello to the BIND-users list,

I am a newly subscribed member to this list, so kindly forgive any faux pas
that I might make when asking assistance. I have searched through the
mailing list archives for an answer to an issue I am experiencing, but I had
not luck, so please don't flame me in case I am asking something that is
regularly asked here. Please also feel free to point me towards the correct
protocol in case this is a dumb question...

In any case, I have a BIND-8.4.7 server that acts as a secondary from a
MyDNS server. The axfr works just fine, but it seems that Bind ignores the
TTL on records where the TTL is less than 300s (5 minutes). It does not
matter if I set the TTL of a record to something smaller (like 30s) on the
MyDNS server, when BIND axfr's it, it makes that TTL 300s. The only thing I
can suspect is that in the Bind source somewhere, there is a #define that
specifies what the minimum TTL is that Bind will accept. If it axfr's a
value less than this, it overrides it with its minimum.

Now I've tried searching through the Bind source for anything '300' and I
have found some definitions, but unfortunately, I cannot assess whether this
is the setting that I am looking for. Could anyone that has encountered this
(and rectified it), please point me in the right direction on where I can
change this?

Thanks,

Stefan Schoeman
South Africa