Educause Security Discussion mailing list archives
Re: DNS TTL best practice general guidance survey
From: "Jacobson, Dick" <dick.jacobson () NDUS EDU>
Date: Tue, 15 Feb 2011 11:53:51 -0800
The question was "excluding special cases". While the TTL is set on some records in the table, the TTL on our SOA record is 24 hours. -----Original Message----- From: The EDUCAUSE Security Constituent Group Listserv [mailto:SECURITY () LISTSERV EDUCAUSE EDU] On Behalf Of John Ladwig Sent: Tuesday, February 15, 2011 1:45 PM To: SECURITY () LISTSERV EDUCAUSE EDU Subject: Re: [SECURITY] DNS TTL best practice general guidance survey I'd add one more dimension to the considerations; availability/agility. We've had a case where a campus main web portal went toes up, and we were all set to do a transitional hosting of the content, but relaized it'd be 24 hours on average before caching nameservers would refresh to use the temporary IP address, and the original outage would be remediated by that time anyway... -jml
"Jacobson, Dick" <dick.jacobson () NDUS EDU> 2011-02-15 13:33 >>>
24 hr -----Original Message----- From: The EDUCAUSE Security Constituent Group Listserv [mailto:SECURITY () LISTSERV EDUCAUSE EDU] On Behalf Of Randall C Grimshaw Sent: Tuesday, February 15, 2011 1:23 PM To: SECURITY () LISTSERV EDUCAUSE EDU Subject: [SECURITY] DNS TTL best practice general guidance survey In your DNS configuration, finding a balance between load, security, and responsiveness... May I please ask what you are using as a general minimum TTL value - excluding special cases ??? Thank you. Randall Grimshaw Syracuse University rgrimsha () syr edu
Current thread:
- DNS TTL best practice general guidance survey Randall C Grimshaw (Feb 15)
- Re: DNS TTL best practice general guidance survey Julian Y. Koh (Feb 15)
- Re: DNS TTL best practice general guidance survey Jacobson, Dick (Feb 15)
- Re: DNS TTL best practice general guidance survey John Ladwig (Feb 15)
- Re: DNS TTL best practice general guidance survey Jacobson, Dick (Feb 15)
- Re: DNS TTL best practice general guidance survey John Ladwig (Feb 15)