查看支持DNSSEC的域名的RRSIG
一、什么是DNSSEC
Domain Name System Security Extensions (DNSSEC)DNS安全扩展,是由IETF提供的一系列DNS安全认证的机制(可参考RFC2535)。它提供了一种来源鉴定和数据完整性的扩展,但不去保障可用性、加密性和证实域名不存在。
root@OpenWrt:~# dig paypal.com +dnssec @4.2.2.4
; <<>> DiG 9.9.4 <<>> paypal.com +dnssec @4.2.2.4
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48979
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags: do; udp: 4096
;; QUESTION SECTION:
;paypal.com. IN A
;; ANSWER SECTION:
paypal.com. 293 IN A 66.211.169.3
paypal.com. 293 IN A 66.211.169.66
paypal.com. 293 IN RRSIG A 5 2 300 20140728175119 20140628172604 11811 paypal.com. ka3J7csLBUiZIrh7YTKJ7eUBzpACe7jmr6M2wURsNCQ/dFjB9Jl018OZ 6i3BzzSYqSS2jw9TmVZMKxRLH3cmt5jc1BNI6Q9uB46DLpJJoAmXQ1rQ ss37Mb4BlK8dD4rxLJmEJh19+Kg8xXxE8iGYwLM7tkyayIjVdxbt80TE vgg=
;; Query time: 224 msec
;; SERVER: 4.2.2.4#53(4.2.2.4)
;; WHEN: Tue Jul 15 21:49:25 CST 2014
;; MSG SIZE rcvd: 241