22 comment

1. Vivek,

   How r u man?
   Vivek, how can I do a reverse ip check to a domain or box in order to know what websites is hosted on that box ?

   I need a linux COMMAND not solving it using a website. Can u help me ?

2. its very simple

   dig -x IP (209.267.166.166)

3. Hi… Please help me… Can u tell me a commands to make a reverse dns record in my server?
   Thansk….
   Paul S.

4. Very userful , Thanks.

5. Excellent. Thank you.

6. @echo off

   REM //NSLOOKUP batch check utility v1.0
   REM //Author: Emin Akbulut eminakbulut@gmail.com
   REM //Date: 03 June 2010
   REM //This code is freeware
   REM //Usage: Modify the DNS and host lists below, at line 23, then simply run the batch file.

   SET timeout=5

   IF “%1” == “/check” GOTO loopit

   :start
   cls
   if exist %0.log del %0.log > nul %2>nul
   if exist %0.bat.log del %0.bat.log > nul %2>nul
   echo —————————————
   echo Starting… %date% %time:~0,8%
   echo —————————————
   echo Report created on %date% %time:~0,8% >> %0.log
   REM %%A for DNS Servers list, %%B for target hosts to be checked
   FOR %%A IN (195.175.39.39 195.175.39.40 8.8.8.8) DO FOR %%B IN (google.com yourdomain.com mail.yourdomain.com) DO CALL %0 /check %%A %%B

   echo ————————————— >> %0.log
   echo —————————————
   echo Done. Press any key to examine the log file…
   Pause > nul
   start notepad “%~0.log”
   GOTO done

   :loopit
   echo ————————————— >> %0.log
   echo nslookup %3 %2
   echo nslookup %3 %2 >> %0.log
   nslookup -timeout=%timeout% %3 %2 >> %0.log 2>nul

   :done

7. nslookup has been obsolete for loooong time. I advise to not to waste your precious time learning utility, that is not supported any more.

8. Please tell me how do i monitor DNS, DHCP, Wins on my server

9. To monitor DNS you may use my script.

   To test DHCP LOCALLY, the commands to inspire are:

   REM Set automatic IP
   netsh interface ip set address name=”LAN” dhcp
   REM Set automatic DNS
   netsh interface ip set dns “LAN” dhcp

   I don’t know much about WINS…

10. dig -x is good enough. Thanks!

11. This might be silly… but I have to ask!

    So the output is “235.43.126.75.in-addr.arpa domain name pointer cyberciti.org.”

    Is “cyberciti.org” the CNAME in this case? If you look up other IP’s you get crazy outputs with dashes and long names which look like a CNAME. Is it too redundant to have yet another reverse entry for a CNAME?

    1. No that is actual reverse entry. Our IP was changes some time ago. To get desired output try

        host 75.126.153.206
       206.153.126.75.in-addr.arpa domain name pointer www.cyberciti.biz.
       

12. Hi Vivek,

    for reverse lookup, do i need to provide domain name or hostname of my server to my isp from which i got public ip?
    Domain name is example.com
    hostname is abc.example.com

    Thanks,
    Rocky

13. Thanks for sharing. This is a good way to see if your ns1. and ns2 are set correctly.

14. Hi,

    Can you please tell me how to create this reverse to records? I have 2 dedicated servers, 203.230 (ns1) / 200.254 (ns2), from localhost command ‘nslookup ip’ reply’s succes but from internet still not working, can you please create an full example?

    Kind Regards

    1. This bash example should print all the hosts from 192.168.1.1 throught .254. (You could edit the IP address lines to suit your network, perhaps.)

       rdns.sh:

       #!/bin/bash for i in {1..254} do myhostname=`host 192.168.1.$i` if [ "$?" -eq 0 ]; then echo -ne $i echo -ne "t" echo -ne "IN" echo -ne "t" echo -ne "PTR" echo -ne "t" echo `echo $myhostname | cut -d " " -f 5` fi done

       #!/bin/bash for i in {1..254} do myhostname=`host 192.168.1.$i` if [ "$?" -eq 0 ]; then echo -ne $i echo -ne "t" echo -ne "IN" echo -ne "t" echo -ne "PTR" echo -ne "t" echo `echo $myhostname | cut -d " " -f 5` fi done

       I use this to generate rdns (reverse dns) files for my bind9 name server:

       bash rdns.sh >> /etc/bind/db.192

       I still need to put the correct lines in at the top of the db.192 file (from db.empty), but it accomplishes most of what I am after.

       1. *Borrowing* Thanks!

    2. As far as I know, the fastest and simplest way to set rDNS is to ask your Server Provider. They do it manually.

15. You are right only the provider can create rdns.

    Thank You

16. I have been asked to check our own DNS and WINS servers to make sure we have all the correct controller details for the ???? Domain are present.
    Reason is We are currently arranging to move the PDC emulator role this week from IC?????? to BD??????

17. note that you can use drill or dig on BSD too – not just Linux

18. Q1) I want to block the users to access the ptv.com website for some user and only for a time while like 1/3 week.how it is possible?
    Q2) other user can not use the internet I want to block the internet of the user.how it is possible?
    Q3) some user can open only permission webistes which I want to allow them like google/gmail/hotmail etc etc but can not access the yahoo/wwe websites.how it is possible?
    Q4) how to block the USB storage devices in Win Xp because when we make a policy to remove all storage device deny all then the option shows that atleast Win Vista. what does it mean?
    Q5) how DNS can take direct IP in the forward and reverse zone?
    Q6) why we use router in DHCP server?
    Q7) I saw if someone is uses in DNS server
    DNS IP 192.168.30.1
    subnet mask 255.255.255.0
    default gateway 192.168.30.2
    preferred DNS 192.168.30.1
    alternate DNS 192.168.30.254
    then it uses in DHCP server
    router IP 192.168.30.2
    why it uses this IP only in the router?why DHCP server can not validate the alternate DNS when we install the DHCP server?
    Q8) I want to allow only 2 user they can change the time and date.how it is possible?

    give me the full description on my email id
    waqasanwer1@gmail.com
    with each step should be mention in the snapshot
    thank you
    for an advance to help me

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