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watchdogs:ping

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watchdogs:ping [2017/02/22 17:21] – [Ping] 1carew1watchdogs:ping [2021/06/25 10:09] (current) – external edit 127.0.0.1
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 +====== Linux - Ping, trace route and TCP dump diagnostic utilities ======
 +===== Ping =====
 +Used to determine if you can reach a server
 +
 +A Successful Ping :
 +
 +<code>
 +ping 8.8.8.8
 +PING 8.8.8.8 (8.8.8.8): 56 data bytes
 +64 bytes from 8.8.8.8: icmp_seq=0 ttl=57 time=12.892 ms
 +64 bytes from 8.8.8.8: icmp_seq=1 ttl=57 time=12.521 ms
 +</code>
 +
 +An unsuccessful ping
 +
 +<code>
 +ping 8.8.8.9
 +PING 8.8.8.9 (8.8.8.9): 56 data bytes
 +Request timeout for icmp_seq 0
 +Request timeout for icmp_seq 1
 +</code>
 +
 +Can be entered in CMD or Linux Terminal
 +ping <URL OR IP Address>
 +
 +
 +===== Trace Route =====
 +traceroute used to track route packets take to network host  
 +
 +Successful Traceroute 
 +<code>
 +traceroute google.ie
 +traceroute to google.ie (216.58.194.195), 64 hops max, 52 byte packets
 + 1  10.5.5.1 (10.5.5.1)  1.181 ms  0.952 ms  0.903 ms
 + 2  d-clon-asr1k.magnet.ie (85.91.0.121)  11.605 ms  14.259 ms  14.413 ms
 + 3  d-clon-core1a.magnet.ie (85.91.0.116)  12.046 ms  15.637 ms  13.594 ms
 + 4  d-rte-core1a.magnet.ie (85.91.3.2)  12.648 ms  12.918 ms  10.985 ms
 + 5  85.91.3.181 (85.91.3.181)  14.005 ms  16.541 ms  14.225 ms
 + 6  74.125.50.253 (74.125.50.253)  12.336 ms  11.716 ms  12.230 ms
 + 7  209.85.252.198 (209.85.252.198)  11.406 ms  12.064 ms  12.008 ms
 + 8  216.239.42.241 (216.239.42.241)  21.312 ms  21.681 ms  21.833 ms
 + 9  108.170.236.33 (108.170.236.33)  98.285 ms
 +    216.239.42.223 (216.239.42.223)  98.982 ms  96.635 ms
 +10  209.85.253.248 (209.85.253.248)  111.174 ms  116.713 ms  115.174 ms
 +11  72.14.232.70 (72.14.232.70)  120.937 ms  119.599 ms  119.836 ms
 +12  209.85.251.139 (209.85.251.139)  130.766 ms  134.095 ms  130.749 ms
 +13  216.239.49.34 (216.239.49.34)  156.740 ms  156.260 ms  155.978 ms
 +14  209.85.249.62 (209.85.249.62)  156.036 ms
 +    209.85.246.39 (209.85.246.39)  156.995 ms  157.330 ms
 +15  108.170.242.225 (108.170.242.225)  159.291 ms
 +    108.170.243.1 (108.170.243.1)  158.126 ms  154.873 ms
 +16  108.170.237.105 (108.170.237.105)  155.194 ms  155.200 ms  155.623 ms
 +17  sfo03s01-in-f3.1e100.net (216.58.194.195)  160.806 ms  164.841 ms  170.866 ms
 +</code>
 +
 +
 +Unsuccessful Traceroute
 +<code>
 +traceroute 8.8.8.9
 +traceroute to 8.8.8.9 (8.8.8.9), 64 hops max, 52 byte packets
 + 1  10.5.5.1 (10.5.5.1)  1.075 ms  0.797 ms  0.782 ms
 + 2  d-clon-asr1k.magnet.ie (85.91.0.121)  17.426 ms  19.110 ms  17.468 ms
 + 3  d-clon-core1a.magnet.ie (85.91.0.116)  14.062 ms  15.015 ms  15.636 ms
 + 4  d-rte-core1a.magnet.ie (85.91.3.2)  17.509 ms  16.887 ms  13.270 ms
 + 5  85.91.3.181 (85.91.3.181)  13.070 ms  17.265 ms  74.194 ms
 + 6  74.125.50.253 (74.125.50.253)  11.457 ms  12.806 ms  13.088 ms
 + 7  209.85.252.196 (209.85.252.196)  17.259 ms  14.733 ms
 +    209.85.252.198 (209.85.252.198)  18.304 ms
 + 8  72.14.236.7 (72.14.236.7)  26.750 ms
 +    216.239.50.243 (216.239.50.243)  29.860 ms
 +    209.85.248.57 (209.85.248.57)  24.639 ms
 + 9  209.85.244.47 (209.85.244.47)  30.573 ms
 +    209.85.246.231 (209.85.246.231)  47.177 ms
 +    209.85.253.108 (209.85.253.108)  28.237 ms
 +10  108.170.237.131 (108.170.237.131)  26.928 ms
 +    108.170.232.7 (108.170.232.7)  28.285 ms
 +    72.14.238.201 (72.14.238.201)  29.297 ms
 +11  * * *
 +12  * * *
 +</code>
 +Note recurring * * * means that it cannot reach the server
 +
 +Can be entered in Linux Terminal
 +
 +traceroute <IP or URL>
 +
 +===== TCP Dump =====
 +A lot can be done with TCP Dump such as monitoring traffic on a specific ethernet port or wifi. A specific port on that device such as port 8080 can be monitored or the traffic from a certain ip address can be monitored.
 +
 +The data from tcpdump can be sent to a file but please visit http://www.tecmint.com/12-tcpdump-commands-a-network-sniffer-tool/
 +
 +For a list of commonly used tcpdump commands.
 +
 +Note as TCP may be listening on reserved ports you may need to run it as sudo
  

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