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Questions tagged [tcpreplay]

A suite of tools to edit and replay captured network traffic. It allows to classify traffic as client or server, rewrite Layer 2, 3 and 4 headers and replay the traffic back onto the network and through network devices.

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DLT error when reading pcap file created with Scapy

I have created a pcap file using Scapy with some dummy values like pkt = IP(dst="116.73.117.174", src="239.50.50.12") / UDP(sport=10812, dport=42)/ Raw(load=b"Data")) pkt.show2() # Calculates checksum wrpcap('DATA.pcap', pkt, append=True) But when…
DrBug
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Why can't capture rewritten packet

I'm using tcpdump and tcpreplay in ubuntu for capturing packet and resending(with rewriting and openwrt for ap mode in raspberry pi. My problem is that I cannot capture resent packet. This is my network : A ----> B(RPI) …
YoonPD
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Why does sub-processing tcprewrite cause EOF error?

I'm trying to use execute tcprewrite in a python while loop with input but i keep getting EOF errors. I know that input can cause EOF error when the subprocessing for tcprewrite is executed. I've tried subprocessing other commands like touch and…
Ken Tong
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nmap used with tcpreplay questions

i am trying a SYN attack , in a controlled environment. My process: I started tcpdump process with filters to capture packets from one PC to another, only outgoing packets , I started a nmap process with -sS , I captured the outgoing SYN packets…
random_numbers
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Prevent tcpreplay blocking Mininet Python API cmds

I need to execute multiple different commands to replay pcaps into my network. The first pcap is over 100 seconds, I need to play it and then immediately play other pcaps. My problem is, when I execute this line in my python code: h2.cmd('tcpreplay…
HCF3301
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Fragmented UDP frame - only receiving one frame when sending with tcpreplay or scapy

I am replaying from a .pcap file that contains a single UDP datagram that has been fragmented into two frames. When using tcpreplay or scapy, both programs indicate they sent both frames, but I only receive 1 on the directly connected device. Any…
john
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How to replay a network trafic of PGM protocol using tcpreplay?

I want to multicast a network trafic to specific multicast destination IP address. In input pcap file PGM protocol packets are available. I'm performing following steps of tcpreplay to multicast a pcap file over a network- rewriting destination and…
ketan
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I am trying to replay a pcap file that someone else captured for me (Im assuming they used tcpdump)

Linux command: tcpreplay -i replay -L 60000 -p 1000 20160627-ssmon01.pcap Output: sending out replay processing file: 20160627-080001-ssmon01-napa0.pcap Fatal Error: Error opening pcap file: unknown file format I do not understand why this is…
Jonathon Hill
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TCPDump and TCPReplay to record and replay requests to application servers

Can TCPDump and TCPReplay be used to record(tcpdump) network traffic coming in to a application server/webserver/queue application etc., and then replayed using the dump on TCPReplay? Let's say I setup a apache server and use TCPDump to capture the…
tsar2512
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tcpreplay error: Libpcap versions < 0.7.2 are not supported

while configuring tcpreplay by root@sdn1-PC:/home/cdcju/tcpreplay-4.1.1# ./configure i am getting error saying checking for libpcap version... configure: error: Libpcap versions < 0.7.2 are not supported Please upgrade to version 0.7.2 or…
Om Prakash Kumar
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running tcpreplay with docker and boot2docker

I'm working on a netflow logger and I want to setup some automated performance testing. I want to take my testing pcap and replay it to my program from within a docker image running under boot2docker. The networking side of this is stumping me. I…
skarface
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Why can't our packet sniffer receive all of the replayed TCP packets?

We are trying to replay a pcap file (smallFlows.pcap) over a 10 GbE connection using tcpreplay and capture all the packets, recording the source and destination ports/IP addresses. However, there is significant packet loss. At 3 Gbps, we are…
user2471905
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modifying http header/parameters in a pcap file

Is there any way to add/modify existing http header/request parameter in a pcap file? Any tools out there or do I need to assemble back to HTTP using Justniffer or similar tool and go from there?
vpram86
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TCPReplay - Time Interval between loops

tcpreplay -i eth1 --pktlen -p3200 -l10 Sample.pcap Above it the command I am using, I need to replay packets at good speeds, but I also need it to take a break of about 20 seconds before next round
ezrasam
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Pcap open an interface and inject packets

I need to write a program in C to read in pcap files and extract the packets and send them out . It's like a traffic replay. I know there's tcpreplay but I didn't see its C library, it seems to be only a command-line application. I know how to do it…
J Freebird
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