That's what makes this whole discussion so much fun. There don't seem to be any yes/no answers.
Based on my reading yesterday and consistent with our findings here it seems the most likely issue is somewhere in the network path rather than the name server itself. You should check your internal routers/switches/firewalls first. -----Original Message----- From: bind-users-bounces+jlightner=water....@lists.isc.org [mailto:bind-users-bounces+jlightner=water....@lists.isc.org] On Behalf Of Mark Andrews Sent: Tuesday, May 04, 2010 12:31 AM To: Jeff Pang Cc: bind-us...@isc.org Subject: Re: our isp not supports EDNS? In message <y2sf7e964441005031927m7774769ev280156817d8b4...@mail.gmail.com>, Je ff Pang writes: > Hello, > > Following the discussions in the list, I made a test on one of our > servers, which is in an ISP's datacenter. > > The result is below: > > $ dig +short rs.dns-oarc.net txt > rst.x476.rs.dns-oarc.net. > rst.x485.x476.rs.dns-oarc.net. > rst.x490.x485.x476.rs.dns-oarc.net. > "218.204.255.72 DNS reply size limit is at least 490" > "218.204.255.72 lacks EDNS, defaults to 512" > "Tested at 2010-05-04 02:23:51 UTC" > > Does this mean our ISP's filrewall block EDNS query/response? Maybe / maybe not. It could just mean that the nameserver itself doesn't support EDNS. > Thanks. > _______________________________________________ > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users Proud partner. Susan G. Komen for the Cure. Please consider our environment before printing this e-mail or attachments. ---------------------------------- CONFIDENTIALITY NOTICE: This e-mail may contain privileged or confidential information and is for the sole use of the intended recipient(s). If you are not the intended recipient, any disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you. ---------------------------------- _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
