cname chain limit

Torsten toto at the-damian.de
Fri Jul 9 11:01:26 UTC 2010


Am Fri, 9 Jul 2010 15:08:20 +0530
schrieb rams <bramesh80 at gmail.com>:

> Hi ,
> 
> What is the cname chains limit ?
> 
> Thanks & Regards,
> Ramesh


I've managed to get 17 cnames into a chain returned by dig. named-checkzone wouldn't mind additional cnames though. In my example zone I've put 100 cnames into a chain without any complains.


[toto at daddelkiste conf]# dig @127.0.0.1 cname-1.test a

; <<>> DiG 9.6.2-P2-RedHat-9.6.2-5.P2.fc12 <<>> @127.0.0.1 cname-1.test a
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 59028
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 17, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;cname-1.test.			IN	A

;; ANSWER SECTION:
cname-1.test.		43200	IN	CNAME	cname-2.test.
cname-2.test.		43200	IN	CNAME	cname-3.test.
cname-3.test.		43200	IN	CNAME	cname-4.test.
cname-4.test.		43200	IN	CNAME	cname-5.test.
cname-5.test.		43200	IN	CNAME	cname-6.test.
cname-6.test.		43200	IN	CNAME	cname-7.test.
cname-7.test.		43200	IN	CNAME	cname-8.test.
cname-8.test.		43200	IN	CNAME	cname-9.test.
cname-9.test.		43200	IN	CNAME	cname-10.test.
cname-10.test.		43200	IN	CNAME	cname-11.test.
cname-11.test.		43200	IN	CNAME	cname-12.test.
cname-12.test.		43200	IN	CNAME	cname-13.test.
cname-13.test.		43200	IN	CNAME	cname-14.test.
cname-14.test.		43200	IN	CNAME	cname-15.test.
cname-15.test.		43200	IN	CNAME	cname-16.test.
cname-16.test.		43200	IN	CNAME	cname-17.test.
cname-17.test.		43200	IN	CNAME	cname-18.test.

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Fri Jul  9 12:55:50 2010
;; MSG SIZE  rcvd: 413



Ciao
Torsten



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