public:networking_tools
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public:networking_tools [2020/10/11 12:59] – rhudak | public: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:// | ||
- | === Hardware Used === | + | [[public:multipath |
- | + | ||
- | fitlet2 J3455 Barebone | + | |
- | 16 GB RAM for Fitlet2 | + | |
- | 512 GB SATA SSD for fitlet2 | + | |
- | FC-M2LAN FACET-Card (2x Gbit Ethernet) | + | |
- | + | ||
- | === Operating System === | + | |
- | + | ||
- | [[https:// | + | |
- | + | ||
- | ==== Magic Sauce ==== | + | |
- | Edit **/// | + | |
- | + | ||
- | auto eth0 | + | |
- | iface eth0 inet static | + | |
- | address [[KA]] | + | |
- | netmask [[255.255.255.0]] | + | |
- | network [[KA network IP]] | + | |
- | broadcast [[KA Broadcast]] | + | |
- | + | ||
- | + | ||
- | Edit **/// | + | |
- | # | + | |
- | # 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 | + | |
- | 2 ka | + | |
- | 3 | + | |
- | 4 | + | |
- | + | ||
- | Create **/// | + | |
- | + | ||
- | 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: | [[public: | ||
Line 70: | Line 11: | ||
[[public: | [[public: | ||
- | ===== tcpdump ===== | ||
- | |||
- | |||
- | |||
- | If you ssh into a computer and want to use tcpdump to view traffic, ssh (22) can be excluded | ||
- | tcpdump -I [interface] -n ' | ||
- | 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: | ||
- | 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] | ||
public/networking_tools.txt · Last modified: 2024/01/25 03:31 by 127.0.0.1