Free packet loss software for windows

Packet Spy is a free and useful packet sniffer utility.
Packet Spy is a tool designed with the purpose of monitoring incoming and outgoing packets from a given network. It is most useful in situations where you need to verify the security of a packet or monitor the responses invoked by the network.
It features an onscreen view of sent/received packets and can also log results to a file for further examination.
Main features:
- Displays incoming and outgoing packets from a given source
- Create filters to monitor for specific traffic
- Output reports to log files for further examination
- Displays IP/TCP/UDP packet header information

Connects to a port through winsock protocol and then sends text strings. Packet Sender is a small and simple application that connects to a port through winsock protocol and then sends text strings.
Installation:
- Run Packet Sender.exe.
- Enter the server ip and port, hit connect and wait a second until connected.
- Enter the Query or packet you want to send, and press go.

Colasoft Packet Player 1.1 build 186 is an effective utility that allows you to open captured packet trace file and playback in the network.

Major Features:

1. Colasoft Packet Player supports many packet trace file formats created by many sniffer software, such as Colasoft Capsa, Ethereal, Network General Sniffer and WildPackets EtherPeek/OmniPeek etc, it also support burst mode and loop sending feature.
2. Except sending packet files in original interval between loops, Colasoft Packet Player also supports sending packet files in burst mode and defining the delay between loops if the loop count is more than one.
3. Replay a packet file is very simple. First, you need choose an active network adapter for sending packet, and then specify a packet file, you can also set following options:
   • Burst Mode - If checked, Colasoft Packet Player will send packets one after another without wait. If you want to send packets in its normal speed, leave this option unchecked.
   • Loop Sending - Specify the loop times of sending packet file. Enter zero if you want to keep sending packets until you stop it manually.
   • Delay Between Loops - Specify the interval between every loop.

Requirements: Windows 2000/XP/2003/Vista

Colasoft Packet Builder 1.0 build 151 is developed as a handy and helpful program which helps you easily build custom network packets and safeguard your network against attacks and intruders. Colasoft Packet Builder provides you very powerful editing feature, besides common HEX editing raw data, it featuring a Decoding Editor which allows you edit specific protocol field value much easier.