Need for Additional Records in a
Hello, When we are getting Additional Section for a DNS Response like this, What is the need for this ADDITIONAL SECTION? Why is this ADDITIONAL SECTION returned? Is there a way to turn off these ADDITIONAL RESPONSE messages from the DNS Server? dig _sip._udp.belur.inlab.com SRV ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6 <<>> _sip._udp.belur.inlab.com SRV ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62992 ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 2 ;; WARNING: recursion requested but not available ;; QUESTION SECTION: ;_sip._udp.belur.inlab.com. IN SRV ;; ANSWER SECTION: _sip._udp.belur.inlab.com. 60 IN SRV 0 0 11199 belur.inlab.com. ;; AUTHORITY SECTION: inlab.com. 60 IN NS sbxlinux3.inlab.com. ;; ADDITIONAL SECTION: belur.inlab.com.60 IN A 10.54.80.14 sbxlinux3.inlab.com.60 IN A 10.54.78.21 Thanks Harshith ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: Need for Additional Records in a
Hi Harshith On Wed, Jul 22, 2015 at 11:51:53AM +0530, Harshith Mulky wrote: > Hello, > > When we are getting Additional Section for a DNS Response like this, > What is the need for this ADDITIONAL SECTION? Why is this ADDITIONAL > SECTION returned? Is there a way to turn off these ADDITIONAL RESPONSE > messages from the DNS Server? See RFCs 1034 and 1035 on what the additional section's function is. RRs in this section are required in some cases, and in other cases it's just useful to include them. There are various options that can be used to control what is included in the additional section. See the "BIND 9 Configuration Reference" section in the manual for descriptions of these. Mukund pgpC0W2WuLWlA.pgp Description: PGP signature ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: Need for Additional Records in a
Am 22.07.2015 um 08:21 schrieb Harshith Mulky: When we are getting Additional Section for a DNS Response like this, What is the need for this ADDITIONAL SECTION? Why is this *ADDITIONAL SECTION *returned? to save the client a query for that record Is there a way to turn off these *ADDITIONAL RESPONSE* messages from the DNS Server? minimal-responses yes; signature.asc Description: OpenPGP digital signature ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users