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PacketSquare Logo
PacketSquare On Fedora
PacketSquare-Capedit on Fedora
Developer(s) The PacketSquare team
Stable release 0.0.1 / April 11, 2010 (2010-04-11)
Preview release r35 / April 29, 2010 (2010-04-29)
Written in C, GTK+
Operating system Linux
Type Packet analyzer
License GNU General Public License

PacketSquare (CapEdit) is a free and open-source pcap-based network protocol testing tool.[1] It is used for testing network devices (IDS/IPS, firewall, routers switches etc.,), network troubleshooting, analysis, software and communications protocol development, and education.

Currently PacketSquare-CapEdit runs on Linux, using the GTK+ widget toolkit to implement its user interface, and written in C. Released under the terms of the GNU General Public License v3, PacketSquare-CapEdit is free software.


PacketSquare-CapEdit works by editing protocol fields of the saved packet capture file and replaying. In addition to editing and replaying it supports many features for extrapolation of captured traffic.


PacketSquare is an open source community started in April 2010 by Vijay Mohan, Sushant Gupta and Anant Dixit for developing computer network testing tools.[2] The Community is currently working on CapEdit, used for testing wide range of network security and monitoring products.


  • Currently supports pcap standard packet capture format, as used by tcpdump, Wireshark, and other programs.
  • Protocols supported: Ethernet II, VLAN, MPLS, ARP, IPv4, IPv6, ICMPv4, IGMPv3, GRE, IP-in-IP, UDP and TCP.[3]
  • Protocol field value modification.
  • Packet deletion.
  • Packet duplication.
  • Packet reordering.
  • Fragmentation of packets.
  • VLAN, MPLS tags can be added to the packets.
  • TCP and UDP stream-based field value modification.
  • IP and MAC address find and replace.
  • Auto checksum for IP, ICMP, IGMP, TCP and UDP protocols.
  • Interface selection for sending packets.
  • Option for sending a single selected packet or all packets.
  • Pcap edit and replay.


External links[edit]