There's a free packet sniffer by Microsoft, WIndows Server 2003 Network Monitor. It can be a useful tool for network troubleshooting. To install the basic version, following these steps:
The mentioned version allows only to view data frames coming sent/received by the computer. You should use more powerful type of software to set up actual network monitoring, using higher level protocols.
- open Control Panel, click on 'Ad/Remove Programs'
- click 'Add/Remove Windows Components'
- select 'Management and Monitoring Tools', click 'Details'
- check 'Network Monitor Tools', click 'OK'
- click 'Next'; if necessary, either insert the proper removable media with original Windows Server 2003 CD/DVD or enter the appropriate location
- click 'Finish'
The mentioned version allows only to view data frames coming sent/received by the computer. You should use more powerful type of software to set up actual network monitoring, using higher level protocols.