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nslookup command? nslookup command?
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  #1 (permalink)  
Old 02-09-2009
Felicia23 Felicia23 is offline
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nslookup command?
Hai guys,
In which way does the command,"nslookup", will be helpful? Please give me examples.
Thanks.
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Old 02-09-2009
jim mcnamara jim mcnamara is offline Forum Staff  
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It gives you information about internet sites and domains

If you use it from the command line:
Code:
nslookup mysite.com
nslookup 1.2.3.4
This gives additional information as well as validates the name/ip address.
To go into "interactive mode" just type nslookup
You can read the man page to see what you can do there.

Not everything will work - depending on the local site's security policy and/or the remote site's security policy.
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Old 02-09-2009
Felicia23 Felicia23 is offline
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Thanks-jim mcnamara
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Old 02-11-2009
techlinux techlinux is offline
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nslookup provides additional info about dns, particularly record info, has a lot of possible switches to get specific info about a record. Also can be run interactively. You can use it to get ip address for domain then dig further to get record info. For example if troubleshooting email, you can use it to make sure mx records are present and they are working properly.
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Old 02-11-2009
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Lazydog Lazydog is offline
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I would suggest using DIG for DNS lookups/troubleshooting.
Very powerful and returns more information.

DIG output:
Code:
U:\>dig www.unix.com

; <<>> DiG 9.3.1 <<>> www.unix.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 80
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 5, ADDITIONAL: 5

;; QUESTION SECTION:
;www.unix.com.                  IN      A

;; ANSWER SECTION:
www.unix.com.           120     IN      A       81.17.242.186

;; AUTHORITY SECTION:
unix.com.               381     IN      NS      ns1.sitelutions.com.
unix.com.               381     IN      NS      ns5.sitelutions.com.
unix.com.               381     IN      NS      ns2.sitelutions.com.
unix.com.               381     IN      NS      ns4.sitelutions.com.
unix.com.               381     IN      NS      ns3.sitelutions.com.

;; ADDITIONAL SECTION:
ns1.sitelutions.com.    170479  IN      A       66.117.40.216
ns2.sitelutions.com.    170479  IN      A       69.26.176.28
ns3.sitelutions.com.    170480  IN      A       66.231.180.140
ns4.sitelutions.com.    170480  IN      A       69.26.176.208
ns5.sitelutions.com.    31857   IN      A       69.93.94.154

;; Query time: 406 msec
;; SERVER: <hidden>
;; WHEN: Wed Feb 11 12:36:01 2009
;; MSG SIZE  rcvd: 228
NSLOOKUP output:

Code:
U:\>nslookup www.unix.com
Server:  <hidden>
Address:  <hidden>

Non-authoritative answer:
Name:    www.unix.com
Address:  81.17.242.186
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Old 02-13-2009
Felicia23 Felicia23 is offline
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Thanks-techlinux,Lazydog
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