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public:networking_tools [2019/11/01 21:14] (current)
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 +====== Linux Network Testing Tools ======
 +
 +
 +===== tcpdump =====
 + 
 +
 +
 +If you ssh into a computer and want to use tcpdump to view traffic, ssh (22) can be excluded
 +  tcpdump -I [interface] -n 'port!22'
 +Capture traffic leaving a host
 +  tcpdump -pi [interface] src host [hostname]
 +Watch for traffic leaving one network and entering two other networks
 +  tcpdump -pi [interface] src net [network] and dst net [network2] or [network3]
 +  tcpdump -pi [interface] src net 128.128.252.0/28 and dst 192.168.11.0/24 or 192.168.12/24
 +
 +===== NMAP =====
 +
 +
 +To see what computers are up, what OS they are running and what ports are open:
 +  nmap -sS -O [network]    ie: nmap -sS -O 192.168.11.0
 +  
 +
 +===== iftop =====
 +
 +To look at https traffic on the science network:
 +  iftop -I [interface] -f "dst port 443" 
 +===== iPerf =====
 +
 +Need to setup a server (sender) and client (listener)
 +  On shore just listen
 +         iperf -s -u
 +  On shore listen on a certain port    
 +      iperf -s -u -p 55437
 +
 +  From ship, send 7 M
 +     iperf -c [shoreip number]  -u -t 120 -b 7M
  
public/networking_tools.txt ยท Last modified: 2019/11/01 21:14 (external edit)