DNS maximum message size
marka at isc.org
Wed Aug 26 12:07:53 UTC 2009
In message <c923553c0908260234q46fef3d4g2591d8ef3a5324ea at mail.gmail.com>, Luis
> Can anyone tell me the maximum size for DNS messages using TCP? I scanned
> all RFCs that I knew, but I can't find the answer. The problem is that I'm
> integrating my BIND server with a DNS name server which can only send AXFR
> answers with a 65535 maximum message size.
> Thank you,
DNS messages over TCP are limited to 65535 bytes due to
there being only two bytes to encode the length in.
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: marka at isc.org
More information about the bind-users