Securing-Optimizing-RH-Linux-1_2_244
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© Copyright 1999-2000 Gerhard Mourani and Open Network Architecture ®
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To query domain name servers using resolver, use the command:
[root@deep /]# dnsquery <host>
For example:
[root@deep /]# dnsquery www.redhat.com
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40803
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 4
;; www.redhat.com, type = ANY, class = IN
www.redhat.com. 2h19m46s IN CNAME www.portal.redhat.com.
redhat.com.
2h18m13s IN NS ns.redhat.com.
redhat.com.
2h18m13s IN NS ns2.redhat.com.
redhat.com.
2h18m13s IN NS ns3.redhat.com.
redhat.com.
2h18m13s IN NS speedy.redhat.com.
ns.redhat.com.
1d2h18m8s IN A 207.175.42.153
ns2.redhat.com. 1d2h18m8s IN A 208.178.165.229
ns3.redhat.com. 1d2h18m8s IN A 206.132.41.213
speedy.redhat.com. 2h18m13s IN A 199.183.24.251
Where <host> is the name of the host you want to qery.
host
The host program look up host names using DNS.
·
To look up host names using domain server, use the command:
[root@deep /]# host <FQDN, domain names, host names, or host numbers>
For example:
[root@deep /]# host redhat.com
redhat.com has address 207.175.42.154
Where <FQDN, domain names, host names, or host numbers> is either FDQN
(www.redhat.com), domain names (redhat.com), host names (www) or host numbers
(207.175.42.154).
·
To find all of the information about host maintained by the DNS, use the command:
[root@deep /]# host <-a domain names >
For example:
[root@deep /]# host -a redhat.com
Trying null domain
rcode = 0 (Success), ancount=6
The following answer is not authoritative:
The following answer is not verified as authentic by the server:
redhat.com 8112 IN NS ns.redhat.com
redhat.com 8112 IN NS ns2.redhat.com
redhat.com 8112 IN NS ns3.redhat.com
redhat.com 8112 IN NS speedy.redhat.com
redhat.com 8112 IN A 207.175.42.154
redhat.com 11891 IN SOA ns.redhat.com noc.redhat.com(
2000021402
;serial (version)
3600
;refresh period
1800
;retry refresh this often
604800
;expiration period
86400
;minimum TTL
)
For authoritative answers, see:
redhat.com 8112 IN NS ns.redhat.com
redhat.com 8112 IN NS ns2.redhat.com
redhat.com 8112 IN NS ns3.redhat.com
redhat.com 8112 IN NS speedy.redhat.com