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public:networking_tools [2020/10/10 11:17] – [Multipath Network Testing] lstolppublic:networking_tools [2020/10/18 13:26] – lstolp
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 ====== Linux Network Testing Tools ====== ====== Linux Network Testing Tools ======
  
-===== Multipath Network Testing ===== 
-To test different network paths from ship to shore using each WAN option directly. For this test we used a [[https://fit-iot.com/web/products/fitlet2 |fitlet2]] computer with 4 Gigibit Ethernet ports. 
  
-=== Hardware Used ===+[[public:multipath |Multipath Network ]]
  
-  fitlet2 J3455 Barebone +[[public:tcp_dump|tcpdump]]
-  16 GB RAM for Fitlet2 +
-  512 GB SATA SSD for fitlet2 +
-  FC-M2LAN FACET-Card (2x Gbit Ethernet)+
  
-=== Operating System ===+[[public:nmap|NMAP]]
  
- [[https://linuxmint.com/download.php | Ubuntu Mint 20]] was used. +[[public:iftop|iftop]]
  
-=== Magic Sauce ==== +[[public:iPerf|iPerf]]
-Edit **///etc/network/interfaces//** and add a static IP for each WAN +
- +
-  auto eth0 +
-  iface eth0 inet static +
-      address [[KA]] +
-      netmask [[255.255.255.0]] +
-      network [[KA network IP]] +
-      broadcast [[KA Broadcast]] +
-       +
-       +
-Edit **///etc/iproute2/rt_tables //** to create local tables +
-  # +
-  # reserved values +
-  # +
-  255    local +
-  254    main +
-  253    default +
-  0    unspec +
-  # +
-  # local +
-  # Create multipath routing tables for Sealink and KA and Cell if available +
-  # A table can also be created to send traffic out the regular ship (via cyberoam and peplink) +
-  1   sealink +
-  2   ka +
-  3   cell +
-  4   ship     +
- +
-Create **///root/bin/multipath.sh//**  +
-   +
-The multipath script needs to be run as sudo, so have installed it in /root/bin +
- +
-  # multipath.sh +
-  # script to add routes out each WAN using tables created above +
-  ip route add default via [[ka static ip]] dev [[ka eth]] table ka +
-  ip route add default via [[sealink static ip]] dev [[sealink eth]] table hsn +
-  ip route add default via [[cell static ip]] dev [[cell eth]] table cell +
-  ip route add default via [[ship static ip]] dev [[cell eth]] table ship +
-   +
-  # Add rules to the rules  +
-  ip rule add from [[ka static ip]] table ka +
-  ip rule add from [[sealink static ip]] table hsn +
-  ip rule add from [[cell static ip]] table cell +
-  ip rule add from [[ship static ip]] table ship +
-  ip rule list +
- +
- +
-===== 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 · Last modified: 2024/01/25 03:31 by 127.0.0.1
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