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--- public:networking_tools [2020/10/10 10:28] – [iftop] lstolp
+++ public:networking_tools [2020/10/18 13:24] – lstolp
@@ Line 1: / Line 1: @@
 ====== Linux Network Testing Tools ======
+===== Multipath WAN 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.
-===== tcpdump =====
+=== Hardware Used ===
+  fitlet2 J3455 Barebone
+GB RAM for Fitlet2
+GB SATA SSD for fitlet2
+  FC-M2LAN FACET-Card (2x Gbit Ethernet)
-If you ssh into a computer and want to use tcpdump to view traffic, ssh (22) can be excluded
+=== Operating System ===
-  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 =====
+ [[https://linuxmint.com/download.php | Ubuntu Mint 20]].
+==== Magic Sauce ====
+Edit **///etc/network/interfaces//** and add a static IP for each WAN
-To see what computers are up, what OS they are running and what ports are open:
+  auto eth0
-  nmap -sS -O [network]    ie: nmap -sS -O 192.168.11.0
+  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
+  #
+    local
+    main
+    default
+    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)
+   sealink
+   ka
+   cell
+   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
+==== Other Useful Commands ====
+[[public:multipath |Multipath Network ]]
-===== iftop =====
+[[public:tcp_dump|tcpdump]]
-To look at https traffic on the science network:
+[[public:nmap|NMAP]]
-  iftop -i [interface] -f "dst port 443"
-===== iPerf =====
-Need to setup a server (sender) and client (listener)
+[[public:iftop|iftop]]
-  On shore just listen
-         iperf -s -u
-  On shore listen on a certain port
-      iperf -s -u -p 55437
-  From ship, send 7 M
+[[public:iPerf|iPerf]]
-     iperf -c [shoreip number]  -u -t 120 -b 7M