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ajhlinuxuser

Networking: DNS: trying to understand subdomain conventions

ajhlinuxuser
Sep 2nd, 2013
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  1. adam@201wdc0t2:~$ ping -c 1 ip68-14-174-230.ok.ok.cox.net
  2. PING ip68-14-174-230.ok.ok.cox.net (68.14.174.230) 56(84) bytes of data.
  3. 64 bytes from ip68-14-174-230.ok.ok.cox.net (68.14.174.230): icmp_req=1 ttl=52 time=196 ms
  4.  
  5. --- ip68-14-174-230.ok.ok.cox.net ping statistics ---
  6. 1 packets transmitted, 1 received, 0% packet loss, time 0ms
  7. rtt min/avg/max/mdev = 196.350/196.350/196.350/0.000 ms
  8.  
  9.  
  10.  
  11. adam@201wdc0t2:~$ ping -c 1 ok.ok.cox.net
  12. ping: unknown host ok.ok.cox.net
  13.  
  14.  
  15.  
  16. adam@201wdc0t2:~$ ping -c 1 ok.cox.net
  17. ping: unknown host ok.cox.net
  18.  
  19.  
  20.  
  21. adam@201wdc0t2:~$ ping -c 1 cox.net
  22. PING cox.net (68.99.123.161) 56(84) bytes of data.
  23. 64 bytes from ww2.cox.com (68.99.123.161): icmp_req=1 ttl=53 time=58.2 ms
  24.  
  25. --- cox.net ping statistics ---
  26. 1 packets transmitted, 1 received, 0% packet loss, time 0ms
  27. rtt min/avg/max/mdev = 58.241/58.241/58.241/0.000 ms
  28.  
  29.  
  30.  
  31. adam@201wdc0t2:~$ ping -c 1 net
  32. ping: unknown host net
  33.  
  34.  
  35. -----
  36.  
  37.  
  38. Delivery to the following recipient failed permanently:
  39.  
  40. root@ok.ok.cox.net
  41.  
  42. Technical details of permanent failure:
  43. DNS Error: DNS server returned answer with no data
  44.  
  45. Delivery to the following recipient failed permanently:
  46.  
  47. root@ok.cox.net
  48.  
  49.  
  50. Technical details of permanent failure:
  51. DNS Error: DNS server returned answer with no data
  52.  
  53.  
  54. (I sent an email to root@cox.net... it didn't come back)
  55.  
  56.  
  57. -----
  58.  
  59.  
  60. let's try the www's
  61.  
  62. adam@201wdc0t2:~$ ping -c 1 www.ip68-14-174-230.ok.ok.cox.net
  63. ping: unknown host www.ip68-14-174-230.ok.ok.cox.net
  64.  
  65. adam@201wdc0t2:~$ ping -c 1 www.ok.ok.cox.net
  66. ping: unknown host www.ok.ok.cox.net
  67.  
  68. PING www.ok.cox.net (68.1.17.7) 56(84) bytes of data.
  69. ^C
  70. --- www.ok.cox.net ping statistics ---
  71. 1 packets transmitted, 0 received, 100% packet loss, time 0ms
  72. * this does point to a system, but does not have a webserver running. Very interesting (to me).
  73.  
  74.  
  75. adam@201wdc0t2:~$ ping -c 1 www.cox.net
  76. PING www.cox.net (68.99.123.161) 56(84) bytes of data.
  77. 64 bytes from ww2.cox.com (68.99.123.161): icmp_req=1 ttl=53 time=56.3 ms
  78.  
  79. --- www.cox.net ping statistics ---
  80. 1 packets transmitted, 1 received, 0% packet loss, time 0ms
  81. rtt min/avg/max/mdev = 56.360/56.360/56.360/0.000 ms
  82. * here, www.cox.net = cox.net. Or maybe its better to say cox.net = www.cox.net
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