Other than for zone transfers, when does DNS use TCP? dyndns? ------------------------------------------------------------------------------ Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
On Mon, Mar 16, 2009 at 09:46:19AM -0400, Robert Moskowitz wrote:> Other than for zone transfers, when does DNS use TCP? > > dyndns?If the answer to a query is larger than 512B, it is truncated and the client has to repeat the query via TCP to get the full answer. If you can absolutely *guarantee* that you will never ever generate answers that big, your DNS server doesn''t have to support TCP. Keep in mind that if your server supports recursive queries, you have no control over the size of the answers! Andreas -- Andreas Ferber | MarcanT Internet-Services GmbH Systemadministration | Ravensberger Str. 10G, D-33602 Bielefeld aferber@marcant.net | Geschaeftsfuehrer: Thorsten Hojas USt-ID Nr.: DE 190203238 | Handelsregister: Amtsgericht Bielefeld, HRB 35 827 ___________________________________________________________ CONFIDENTIALITY NOTICE The contents of this email are confidential to the ordinary user of the email address to which it was addressed and may also be privileged. If you are not the addressee of this email you may not copy, forward, disclose or otherwise use it or any part of it in any form whatsoever. If you have received this email in error please email the sender by replying to this message. ------------------------------------------------------------------------------ Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
Robert Moskowitz wrote:>Other than for zone transfers, when does DNS use TCP?ANY time the query response would exceed the capacity of a UDP response packet. So yes, it means any resolver (and it''s network path) should support TCP. -- Simon Hobson Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed author Gladys Hobson. Novels - poetry - short stories - ideal as Christmas stocking fillers. Some available as e-books. ------------------------------------------------------------------------------ Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
Robert Moskowitz wrote:> Other than for zone transfers, when does DNS use TCP?When the query or response won''t fit in a 512-byte packet. -Tom -- Tom Eastep \ When I die, I want to go like my Grandfather who Shoreline, \ died peacefully in his sleep. Not screaming like Washington, USA \ all of the passengers in his car http://shorewall.net \________________________________________________ ------------------------------------------------------------------------------ Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
Tom Eastep wrote:> Robert Moskowitz wrote: > >> Other than for zone transfers, when does DNS use TCP? >> > > When the query or response won''t fit in a 512-byte packet.I probably should not have read the macro.DNS at 1am sunday morning. Probably just thought I was seeing double! Now I see both udp and tcp in the DNS macro. ------------------------------------------------------------------------------ Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com