public:networking_tools
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====== Linux Network Testing Tools ====== | ====== Linux Network Testing Tools ====== | ||
+ | The green links show examples | ||
- | ==== Multipath Network Testing ==== | ||
- | To test different network paths from ship to shore using each WAN option directly. | ||
- | ===== tcpdump ===== | + | [[public: |
- | + | A brief description to show how to set up multipath WAN testing device. | |
+ | [[public: | ||
+ | [[https:// | ||
+ | **tcpdump** is a data-network packet analyzer computer program that runs under a command line interface. It allows the user to display TCP/IP and other packets being transmitted or received over a network to which the computer is attached. | ||
- | If you ssh into a computer and want to use tcpdump to view traffic, ssh (22) can be excluded | + | [[public: |
- | tcpdump -I [interface] -n ' | + | [[https:// |
- | Capture traffic leaving a host | + | Nmap (" |
- | 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] | + | |
- | tcpdump -pi [interface] src net 128.128.252.0/28 and dst 192.168.11.0/24 or 192.168.12/ | + | |
- | ===== NMAP ===== | ||
+ | [[public: | ||
+ | Can be used to display bandwidth usage on an interface.\\ | ||
- | To see what computers are up, what OS they are running and what ports are open: | + | [[public:iPerf|iPerf]]\\ |
- | nmap -sS -O [network] | + | [[https://iperf.fr]]\\ |
- | + | iPerf3 is a tool for active measurements of the maximum achievable bandwidth | |
- | + | ||
- | ===== iftop ===== | + | |
- | + | ||
- | To look at https traffic | + | |
- | iftop -i [interface] -f "dst port 443" | + | |
- | ===== iPerf ===== | + | |
- | + | ||
- | Need to setup a server | + | |
- | 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] | + |
public/networking_tools.1602326040.txt.gz · Last modified: 2024/01/25 03:32 (external edit)