![]() ![]() ![]() There are a variety of tools on the market, most of which rely on application program interfaces (APIs) known as pcap (for Unix-like systems) or libcap (for Windows systems) to capture network traffic. These tools aid in the identification, classification, and troubleshooting of network traffic by application type, source, and destination. SolarWinds Network Performance Monitor (My personal favorite tool)Ī packet sniffer is either a software or hardware tool to intercept, log, and analyze network traffic and data.With the right packet sniffer, you’ll be well-equipped to capture and analyze network traffic, helping you identify the cause of network performance problems and prevent them from recurring.Ī Word of Warning - How Hackers Use Packet Sniffers This is where packet sniffers, also known as network sniffers or network analyzers, come into play. Getting to the root cause of performance problems is a top priority for nearly every sysadmin. Next we use this tool to forge massive packets on the lo device.It’s no question that bottlenecks, downtime, and other common network performance issues can vastly affect the end-user experience and put productivity on hold, ultimately cutting into your company’s bottom line. Iperf is a tool for active measurements of the maximum achievable bandwidth on IP networks. u, -unit string unit of traffic stats, optional: B, Kb, KB, Mb, MB, Gb, GB (default "KB ") n, -no-dns-resolve disable the DNS resolution m, -mode int view mode of sniffer (0: bytes 1: packets 2: plot) ![]() i, -interval int interval for refresh rate in seconds (default 1) d, -devices-prefix stringArray prefixed devices to monitor (default ) b, -bpf string specify string pcap filter with the BPF syntax (default "tcp or udp ") a, -all-devices listen all devices if present # only capture the TCP protocol packets with lo,eth prefixed devices # A modern alternative network traffic sniffer. Sniffer relies on the libpcap library to capture user-level packets hence you need to have it installed first. And sniffer manipulates the API provided by gopsutil directly on Windows. On macOS, the lsof command is invoked, which relies on capturing the command output for analyzing process connections information. But both need to aggregate and calculate the network traffic of the process by matching the inode information under /proc/$/fd. Since that approach is more efficient than reading the /proc/net/* files directly. On Linux, sniffer refers to the ways in which the ss tool used, obtaining the connections of the ESTABLISHED state by netlink socket. sniffer combines the advantages of those two projects also adhering a new Plot mode. Another one is nethlogs, which supports BPF filters, but can only view data by process, without connections or remote address perspective. One of the projects that inspired the sniffer is bandwhich, which has a sophisticated interface and multiple ways to display data, but it does not support BPF filters. gopacket wraps the Golang port of libpacp library, and provides some additional features. Sniffer manipulates gopacket to sniff the interfaces and record packets' info. By the way, the TUI of it is responsive that can fit with terminals of all sizes automatically. It can be started at any time to analyze the processes or connections causing increases in network traffic without loading any kernel modules. Sniffer is designed for network troubleshooting. A modern alternative network traffic sniffer inspired by bandwhich(Rust) and nethogs(C++).
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