Re: tcp versus udp

2009-05-07 Thread Sam Wilson
In article , Barry Margolin wrote: > In article , > Sam Wilson wrote: > > > In article , Mark Elkins > > wrote: > > > > > One place that TCP may make sense - if you are involved in a registry > > > system and the process involves actually checking the information that > > > you are given,

Re: tcp versus udp

2009-05-06 Thread Mark Andrews
In message , Barry Margolin writes: > In article , > Sam Wilson wrote: > > > In article , Mark Elkins > > wrote: > > > > > One place that TCP may make sense - if you are involved in a registry > > > system and the process involves actually checking the information that > > > you are given,

Re: tcp versus udp

2009-05-06 Thread Barry Margolin
In article , Sam Wilson wrote: > In article , Mark Elkins > wrote: > > > One place that TCP may make sense - if you are involved in a registry > > system and the process involves actually checking the information that > > you are given, including nameservers (do they exist, do they serve that

Re: tcp versus udp

2009-05-06 Thread Sam Wilson
In article , Mark Elkins wrote: > One place that TCP may make sense - if you are involved in a registry > system and the process involves actually checking the information that > you are given, including nameservers (do they exist, do they serve that > zone - correctly?) - it may make a lot of s

Re: tcp versus udp

2009-05-06 Thread Sam Wilson
In article , Danny Mayer wrote: > Peter Dambier wrote: > > Hello Martin, > > > > since a major outage at my provider, dtag.de or Deutsche Telecom AG, I have > > trouble > > with f.root-servers.net. Sometimes "dig ... +vc" does help me to see > > f.root-servers.net. > > > > The real problem i

Re: tcp versus udp

2009-05-05 Thread Mark Elkins
On Wed, 2009-05-06 at 07:59 +0200, Stephane Bortzmeyer wrote: > On Wed, May 06, 2009 at 12:00:12AM -0400, > Danny Mayer wrote > a message of 39 lines which said: > > > That's nonsense. > > That's Peter Dambier. If you try to fix every mistake he makes, you're > not over soon... Some people a

Re: tcp versus udp

2009-05-05 Thread Stephane Bortzmeyer
On Wed, May 06, 2009 at 12:00:12AM -0400, Danny Mayer wrote a message of 39 lines which said: > That's nonsense. That's Peter Dambier. If you try to fix every mistake he makes, you're not over soon... http://xkcd.com/386/ ___ bind-users mailing lis

Re: tcp versus udp

2009-05-05 Thread Danny Mayer
Peter Dambier wrote: > Hello Martin, > > since a major outage at my provider, dtag.de or Deutsche Telecom AG, I have > trouble > with f.root-servers.net. Sometimes "dig ... +vc" does help me to see > f.root-servers.net. > > The real problem is anycast. With udp it behaves different than with tc

Re: tcp versus udp

2009-05-05 Thread Peter Dambier
> > To: bind-us...@isc.org > From: Peter Dambier > Sent by: bind-users-boun...@lists.isc.org > Date: 05/05/2009 05:31AM > Subject: Re: tcp versus udp > > Hello Martin, > > since a major outage at my provider, dtag.de or Deutsche Telecom AG,

Re: tcp versus udp

2009-05-05 Thread Traynham . Ken
Please explain: With DNSSEC tcp is almost a must. Same with IPv6.Is EDNS0 not sufficient? Thanks,Ken Ken TraynhamNetwork Engineer, ITS-EPA CLIN9CSC79 TW Alexander Drive, Building 4201, Durham NC 27709ITIS | p: 919.767.7059 | f: 919.767.7506 | traynham@epa.gov | www.csc.com--

Re: tcp versus udp

2009-05-05 Thread Peter Dambier
Hello Martin, since a major outage at my provider, dtag.de or Deutsche Telecom AG, I have trouble with f.root-servers.net. Sometimes "dig ... +vc" does help me to see f.root-servers.net. The real problem is anycast. With udp it behaves different than with tcp. When querying servers that are di

Re: tcp versus udp

2009-05-04 Thread Ben Croswell
Also if EDNS0 is in effect theoretically the max size would be 4096 bytes before a truncate happened. -- -Ben Croswell On Mon, May 4, 2009 at 8:55 PM, Martin McCormick wrote: > Matt Baxter writes: > > When a response can not fit in a single UDP packet the server will mark > > the > > truncated

Re: tcp versus udp

2009-05-04 Thread Martin McCormick
Matt Baxter writes: > When a response can not fit in a single UDP packet the server will mark > the > truncated flag (and respond with all the data it can inside the UDP > packet). That should trigger a client to resubmit the query via TCP. Zone > transfers are the most common use for TCP, but it

Re: tcp versus udp

2009-05-04 Thread Matt Baxter
On May 4, 2009, at 7:28 PM, Martin McCormick wrote: When are tcp dns queries necessary? It was my understanding that clients could user tcp or udp. When a response can not fit in a single UDP packet the server will mark the truncated flag (and respond with all the data it c

RE: tcp versus udp

2009-05-04 Thread Baird, Josh
In addition, TCP is used for queries > 512bytes. Josh From: bind-users-boun...@lists.isc.org on behalf of Eduardo Júnior Sent: Mon 5/4/2009 8:35 PM To: Martin McCormick Cc: bind-us...@isc.org Subject: Re: tcp versus udp Hi, On Mon, May 4, 2009 at 9

Re: tcp versus udp

2009-05-04 Thread Eduardo Júnior
Hi, On Mon, May 4, 2009 at 9:28 PM, Martin McCormick wrote: >When are tcp dns queries necessary? > >It was my understanding that clients could user tcp or > udp. According to what I read, dns queries are executed using udp Only zone transfers use tcp connections. But still acc