[dns-operations] Who Ignores TTLs ?

Haygood, David david.haygood at pgnmail.com
Thu Feb 17 14:35:45 UTC 2011

I know our ISP was extending TTLs of records set with short TTLs. This ruined an email spam software we were using because the TTL was modified so it didn't match the expected value, the software would mark it a spam. 

-----Original Message-----
From: dns-operations-bounces at lists.dns-oarc.net [mailto:dns-operations-bounces at lists.dns-oarc.net] On Behalf Of Simon Lyall
Sent: Wednesday, February 16, 2011 9:01 PM
To: dns-operations at mail.dns-oarc.net
Subject: [dns-operations] Who Ignores TTLs ?

I keep seeing a persistent complaint that some DNS caching operators 
ignore TTLs or otherwise keep records for longer than the TTL would 

I suspect this might be an urban legend since most DNS caching software 
doesn't even offer this as an option last time I checked.

Does anybody actually do this? Because it keep being brought up by some 
peopel as to why things like GSLB don't work.

Simon Lyall  |  Very Busy  |  Web: http://www.darkmere.gen.nz/
"To stay awake all night adds a day to your life" - Stilgar | eMT.

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