Our support engineers find it to be invaluable for troubleshooting Ethernet communications issues, as it provides visibility into more than just the protocol data packets, including handshaking calls and responses. Use Ctrl-C to stop capturing at any time.As you may be aware, Wireshark is an incredibly useful freeware tool for capturing network traffic on a computer. "Capture packets from interface eth0 until 60s passed into output.pcapng" C maximum number of bytes used for buffering packets wiĮxample: dumpcap -i eth0 -a duration:60 -w output.pcapng N maximum number of packets buffered within dumpcap n use pcapng format instead of pcap (default) duration:NUM - switch to next file after NUM secsįilesize:NUM - switch to next file after NUM KBįiles:NUM - ringbuffer: replace after NUM files g enable group read access on the output file(s) duration:NUM - stop after NUM secondsįilesize:NUM - stop this file after NUM KB Timer:NUM - capture no more than 1 packet in NUM ms r don't ignore own RPCAP traffic in captureĬount:NUM - capture one packet of every NUM M for -D, -L, and -S, produce machine-readable output
S print statistics for each interface once per second
d print generated BPF code for capture filter L print list of link-layer types of iface and exit y link layer type (def: first appropriate) B size of kernel buffer in MB (def: 2MB) Or for remote capturing, use one of these packet filter in libpcap filter syntax i name or idx of interface (def: first non-loopback), C:\Program Files (x86)\Wireshark>dumpcap.exe -hĭumpcap 1.10.3 (SVN Rev 53022 from /trunk-1.10)Ĭapture network packets and dump them into a pcapng file. Takes only a few minutes of reading the parameters to learn how to use it. I have used it on remote computers where I only had console access, it works quite well.
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