There are many alternatives to tcpdump for Windows if you are looking to replace it. The most popular Windows alternative is 
Wireshark, which is both free and Open Source. If that doesn't suit you, our users have ranked 22 alternatives to tcpdump and 14 are available for Windows so hopefully you can find a suitable replacement. Other interesting Windows alternatives to tcpdump are 
Sysdig (Free, Open Source), 
SmartSniff (Free), 
NetworkMiner (Free, Open Source) and 
PacketSled (Freemium).
tcpdump is a common packet analyzer that runs under the command line. If you're looking for more info about tcpdump like screenshots, reviews and comments you should visit our info page about it. Below you find the best alternatives.
Wireshark is the world's foremost network protocol analyzer. It lets you capture and interactively browse the traffic running on a computer network. It is the de facto (and often de jure) standard across many industries and educational institutions.
Sysdig is open source, system-level exploration: capture system state and activity from a running Linux instance, then save, filter and analyze. Think of it as strace + tcpdump + lsof + awesome sauce. With a little Lua cherry on top.
SmartSniff is a packet sniffer that capture TCP/IP packets and display them as sequence of conversations between clients and servers. You can view the TCP/IP conversations in Ascii mode (for text-based protocols, like HTTP, SMTP, POP3 and FTP) or as hex dump (for non-text base protocols, like DNS). Application can capture TCP/IP packets on your network without installing a capture driver (works only for Windows 2000/XP or greater).
NetworkMiner is an open source Network Forensic Analysis Tool (NFAT) for Windows (but also works in Linux / Mac OS X / FreeBSD). NetworkMiner can be used as a passive network sniffer/packet capturing tool in order to detect operating systems, sessions, hostnames, open ports etc. without putting any traffic on the network. NetworkMiner can also parse PCAP files for off-line analysis and to regenerate/reassemble transmitted files and certificates from PCAP files.
PacketSled is next generation network forensics and breach detection. Continuously monitor for advanced threats and policy violations missed by other defenses, then analyze and remediate in record time. PacketSled provides three types of threat detection: IOC signature matching, file extraction and analysis and behavioral analytics.
Ethereal® is used by network professionals around the world for troubleshooting, analysis, software and protocol development, and education. It has all of the standard features you would expect in a protocol analyzer, and several features not seen in any other product. Its open source license allows talented experts in the networking community to add enhancements. It runs on all popular computing platforms, including Unix, Linux, and Windows.
Colasoft network packet sniffer or network analyzer software for Windows platform, sniff packets, monitor activities and analyze protocols, best tool for network monitoring and troubleshooting, Free trial available, download now.
WebSiteSniffer is a packet sniffer tool that captures all Web site files downloaded by your Web browser while browsing the Internet, and stores them on your hard drive under the folder that you choose.
Log all traffic on your network card. Analyze and parse network packets. Capture transmitted files and passwords.
RawCap is a free command line sniffer for network activity on Windows. Properties of RawCap: Can sniff any interface that has got an IP address, including 127.0.0.1 (localhost/loopback) RawCap.exe is just 23 kB No external libraries or DLL's needed other than .NET Framework 2.0 No installation required, just download RawCap.exe and sniff Can sniff most interface types, including WiFi and PPP interfaces Minimal memory and CPU load Reliable and simple to use
