· 6 years ago · Jun 30, 2019, 10:26 PM
1$ dig gmail.com MX
2gmail.com. 3412 IN MX 5 gmail-smtp-in.l.google.com.
3gmail.com. 3412 IN MX 10 alt1.gmail-smtp-in.l.google.com.
4
5$ dig gnu.org NS
6gnu.org. 298 IN NS ns1.gnu.org.
7gnu.org. 298 IN NS ns2.gnu.org.
8
9$ dig gnu.org AXFR @ns1.gnu.org
10gnu.org. 300 IN SOA ns1.gnu.org. hostmaster.gnu.org. 2014031109 3600 120 1209600 3600
11gnu.org. 300 IN MX 10 eggs.gnu.org.
12gnu.org. 300 IN A 208.118.235.148
13alpha.gnu.org. 300 IN A 208.118.235.21
14alpha.gnu.org. 300 IN AAAA 2001:4830:134:3::c
15anoncvs.gnu.org. 300 IN CNAME savannah.gnu.org.
16.....
17
18C:> nslookup
19> server ns1.gnu.org
20> ls -a gnu.org
21
22$ ldns-walk -f isc.org
23...
24backdraft.isc.org. 7200 IN A 149.20.50.14
25backupproxy.isc.org. 7200 IN A 149.20.48.23
26banana.isc.org. 7200 IN A 149.20.64.69
27banana.isc.org. 7200 IN AAAA 2001:4f8:0:2::69
28bcn1.isc.org. 3600 IN NS ams.sns-pb.isc.org.
29...