DNS , /db.stu. , DNS- IP-. , stu.:
$ORIGIN.
stu 28800 IN SOA ns.stu. dnsmaster.stu. (
2005033100; Serial
28800; Refresh
7200; Retry
604800; Expire
86400; Time To Live
)
;
28800 IN NS ns.stu.
28800 IN NS ns1.stu.
;
28800 IN MX 10 stalker.stu.
28800 IN MX 20 cs.stu.
$ORIGIN stu.
;
ns IN A 192.168.0.10
ns1 IN A 192.168.0.14
;
dragon IN A 192.168.0.17
auth IN CNAME dragon.stu.
cs IN A 192.168.0.14
stalker IN A 192.168.0.10
www IN CNAME stalker.stu.
mail IN CNAME stalker.stu.
www.docs IN CNAME cs.stu.
kid IN A 192.168.0.12
;
ie-21-7 IN A 192.168.3.40
.
, , . , .
SOA (Start of Authority), (stu., @), TTL, .. , IN (Internet records) SOA.
:
− Refresh , (zone transfer);
− Retry , , ;
− Expire , , .
− TTL .
NS. CNAME (Canonical Name). , www, mail, ftp, , (. www, docs).
A IP. , , .
DNS. .
, DNS-, .. "IP- ". in-addr.arpa, IP- . , DNS- 11.22.33.44 DNS- 44.33.22.11.in-addr.arpa, . IP- , IP- , DNS- ( ) .
|
|
192.168.0.0/16:
$ORIGIN.
0.168.192.IN-ADDR.ARPA.
86400 IN SOA ns.stu. dnsmaster.stu. (
3600000)
86400 IN NS ns.stu.
86400 IN NS ns1.stu.
$ORIGIN 0.168.192.IN-ADDR.ARPA.
10 IN PTR stalker.stu.
14 IN PTR cs.stu.
17 IN PTR dragon.stu.
12 IN PTR kid.stu.
195.69.76.0/24 :
$ORIGIN.
76.69.195.IN-ADDR.ARPA. 86400 IN SOA ns.stu.cn.ua dnsmaster.stu.cn.ua (2004060200 86400 14400 3600000 345600)
IN NS ns.stu.cn.ua.IN NS ns1.stu.cn.ua.
$ORIGIN 0.168.192.IN-ADDR.ARPA.
10 IN PTR stalker.stu.cn.ua.12 IN PTR kid.stu.cn.ua.
, IP .
, , SOA, NS PTR (Pointer), .