Ignoring a Cached records TTL

[Stu]

Hi,

due to many many bizzare reasons we access a host who's TTL is bizarly low,
so the cached record stays on our DNS for seconds, then if theres any
timeout etc where our DNS cant look it up, we cannot resolve the host, is
there any way of getting our DNS box's to ignore the records TTL and hold it
in cache for a more reasonable amount of time, ? if there is it dosent
appear to be obvious.!

Thanks.

 

[Herb Martin]

Hi,

due to many many bizzare reasons we access a host who's TTL is bizarly
low, so the cached record stays on our DNS for seconds, then if theres any
timeout etc where our DNS cant look it up, we cannot resolve the host, is
there any way of getting our DNS box's to ignore the records TTL and hold
it in cache for a more reasonable amount of time, ? if there is it dosent
appear to be obvious.!

No. The TTL "belongs" to the authoritative server.

You could of course create a zone and record for that
name but this would be an effectively infinite timeout
and you would have to keep the record up to date
manually.

Have the record given a decent TTL -- if you cannot
do this due to political reasons (etc) then it is really the
fault and issue of the authoritative server's admin.