public:networking_tools
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public:networking_tools [2020/10/10 10:45] – [Multipath Network Testing] lstolp | public:networking_tools [2024/01/25 03:31] (current) – external edit 127.0.0.1 | ||
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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. For this test we used a [[https:// | ||
- | == Hardware Used == | + | [[public: |
+ | A brief description to show how to set up multipath WAN testing device. | ||
- | fitlet2 J3455 Barebone | + | [[public: |
- | 16 GB RAM for Fitlet2 | + | [[https:// |
- | 512 GB SATA SSD for fitlet2 | + | **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. |
- | FC-M2LAN FACET-Card (2x Gbit Ethernet) | + | |
- | ===== tcpdump ===== | + | [[public: |
- | + | [[https:// | |
+ | Nmap (" | ||
- | If you ssh into a computer and want to use tcpdump to view traffic, ssh (22) can be excluded | + | [[public:iftop|iftop]]\\ |
- | tcpdump -I [interface] -n ' | + | Can be used to |
- | 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/ | + | |
- | + | ||
- | ===== NMAP ===== | + | |
- | + | ||
- | + | ||
- | To see what computers are up, what OS they are running and what ports are open: | + | |
- | nmap -sS -O [network] | + | |
- | + | ||
- | + | ||
- | ===== iftop ===== | + | |
- | + | ||
- | To look at https traffic on the science network: | + | |
- | | + | |
- | ===== iPerf ===== | + | |
- | + | ||
- | Need to setup a server (sender) and client (listener) | + | |
- | On shore just listen | + | |
- | iperf -s -u | + | |
- | On shore listen | + | |
- | iperf -s -u -p 55437 | + | |
- | + | ||
- | From ship, send 7 M | + | |
- | iperf -c [shoreip number] | + | |
+ | [[public: | ||
+ | [[https:// | ||
+ | iPerf3 is a tool for active measurements of the maximum achievable bandwidth on IP networks. It supports tuning of various parameters related to timing, buffers and protocols (TCP, UDP, SCTP with IPv4 and IPv6). For each test it reports the bandwidth, loss, and other parameters. |
public/networking_tools.1602326702.txt.gz · Last modified: 2024/01/25 03:32 (external edit)