If someone has a contact for a network operations desk for the US Navy (San Diego area preferred), please contact me off-list. One of our netblocks appears to be filtered somewhere inside their network, preventing DNS lookups from completing, thus preventing e-mail from being delivered. Inquiries over the last few weeks have not been responded to. Thanks, -- Stephen Fulton
One of our netblocks appears to be filtered somewhere inside their network, preventing DNS lookups from completing, thus preventing e-mail from being delivered.
Am I reading this correctly? You are saying that you have engineered a single point of failure in your network and now you are suffering as a result? As the doctor said to the man who complained that his head hurt whenever he hit it with a hammer, don't do that! Every domain should ensure that it is "hosted" on name servers in several different netblocks which are in several different ASes, and preferably with some significant geographical diversity. There are many ways to do this ranging from renting colo for a server somewhere http://www.vix.com/personalcolo/ or working out a mutual arrangement with another ISP http://www.dnsist.net/ --Michael Dillon
Michael.Dillon@radianz.com wrote:
One of our netblocks appears to be filtered somewhere inside their network, preventing DNS lookups from completing, thus preventing e-mail from being delivered.
Am I reading this correctly? You are saying that you have engineered a single point of failure in your network and now you are suffering as a result?
Do you mean he only gets to ask for help if BOTH netblocks were to be filtered?
On Thu, 10 Mar 2005 Michael.Dillon@radianz.com wrote:
One of our netblocks appears to be filtered somewhere inside their network, preventing DNS lookups from completing, thus preventing e-mail from being delivered.
Am I reading this correctly? You are saying that you have engineered a single point of failure in your network and now you are suffering as a result?
From how I read it, the original poster did not have a network failure, but rather is being afflicted by deliberate packet filtering. That is *not* a SPOF effect.
Sure, multiple diverse nameservers are preferable, but even that will never prevent blanket blocking from causing filures at some remote site. -- -- Todd Vierling <tv@duh.org> <tv@pobox.com>
Hello Stephen. Check http://www.sstar.com/spt_faq.html#navy. It sounds like you might be having the same problem I didn. John John Souvestre - Southern Star - (504) 888-3348 - www.sstar.com -----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Stephen Fulton Sent: Wednesday, March 09, 2005 1:42 PM To: nanog@merit.edu Subject: US Navy Contact. If someone has a contact for a network operations desk for the US Navy (San Diego area preferred), please contact me off-list. One of our netblocks appears to be filtered somewhere inside their network, preventing DNS lookups from completing, thus preventing e-mail from being delivered. Inquiries over the last few weeks have not been responded to. Thanks, -- Stephen Fulton
participants (5)
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Joe Maimon -
John Souvestre -
Michael.Dillon＠radianz.com -
Stephen Fulton -
Todd Vierling