DNS problems to RoadRunner - tcp vs udp

Jon Kibler Jon.Kibler at aset.com
Fri Jun 13 13:14:55 CDT 2008


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Mark Price wrote:
<SNIP>
>>From what I have read, public DNS servers should support both UDP and
> TCP queries.  TCP queries are often used when a UDP query fails, or if
> the answer is over a certain length.
> 

UDP is used for queries.

TCP is used for zone transfers.

If my server responded to TCP queries from anyone other than a secondary
server, I would be VERY concerned.

Jon Kibler
- --
Jon R. Kibler
Chief Technical Officer
Advanced Systems Engineering Technology, Inc.
Charleston, SC  USA
o: 843-849-8214
c: 843-224-2494
s: 843-564-4224

My PGP Fingerprint is:
BAA2 1F2C 5543 5D25 4636 A392 515C 5045 CF39 4253


-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.8 (Darwin)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iEYEARECAAYFAkhSuR8ACgkQUVxQRc85QlNWGwCfUQFP7oNInCRZ72S2V2OSlE7Q
IN4An3Ej+M3jsHFvHNHzl6UMYnczpv0v
=GiEh
-----END PGP SIGNATURE-----




==================================================
Filtered by: TRUSTEM.COM's Email Filtering Service
http://www.trustem.com/
No Spam. No Viruses. Just Good Clean Email.



More information about the NANOG mailing list