Advanced Search

ipconfig flushdns batch file, for host DNS A changes, help users to resolve new host

/ Published in: DOS Batch
Save to your folder(s)

Expand | Embed | Plain Text

Copy this code and paste it in your HTML 
  1. @echo off
  2. rem Set this to the hostname that you just updated the A record on
  3. set hostchk=server.example.org
  4. rem Set this to the new A record address
  5. set correctip=127.127.127.127
  6. nslookup %hostchk%|| goto errornons
  7. rem this is tricky, look for two of the strings "Address"
  8. nslookup -type=A %hostchk% 2>nul | find /c "Address" | find "2" > nul 
  9. if ErrorLevel 1 goto error
  10. for /f "tokens=2" %%a in ('nslookup %hostchk%') do set curhostip=%%a
  11. cls
  12. Echo Your computer thinks %hostchk% goes to %curhostip%
  13. if /i "%curhostip%"=="%correctip%" goto allgood
  14. goto flush
  15.  
  16. :allgood
  17. echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  18. echo That's CORRECT, you're all set for the server transition!
  19. echo When the server comes online, you'll be ready to go.
  20. echo Make sure all your programs reference %hostchk% and not an IP.
  21. echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  22. pause
  23. exit
  24.  
  25. :error
  26. echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  27. Echo For some reason, your computer cannot look up %hostchk%.
  28. Echo Put help text here
  29. Echo Be sure to tell us this error: can't resolve %hostchk%
  30. echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  31. pause
  32. exit
  33. :errornons
  34. echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  35. Echo Your computer doesn't have nslookup so this batch file won't work.
  36. echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  37. pause
  38. exit
  39. :error2
  40. echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  41. Echo For some reason, your computer or ISP still cannot find the right IP
  42. Echo Put help text here
  43. Echo Be sure to tell us this error: got wrong ip %curhostip%
  44. echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  45. pause
  46. exit
  47.  
  48.  
  49. :flush
  50. echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  51. echo That's INCORRECT, it should be %correctip%, so lets flush the DNS cache
  52. echo now and see if it will help.
  53. ipconfig /flushdns
  54. Echo After you press a key, we'll see if flushing the cache worked.
  55. echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  56. pause
  57. for /f "tokens=2" %%a in ('nslookup %hostchk%') do set curhostip=%%a
  58. cls
  59. if /i "%curhostip%"=="%correctip%" goto allgood
  60. goto error2

Report this snippet


Comments

RSS Icon Subscribe to comments

You need to login to post a comment.