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I have following question: on my firewall i can see connections from my win 2003 server:

 Feb  8 15:18:53 gw kernel: [5197300.553485]  **LEGACY** IN=tun6 OUT=vlan1    SRC= DST= LEN=106 TOS=0x00 PREC=0x00 TTL=126 ID=11183 PROTO=UDP  SPT=3611 DPT=161 LEN=86 

But i can't see this traffic from win 2003 ( with netstat or with TCPView What else can be done to find source application for this traffic?

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Install Microsoft Network Monitor on the server in question, start a capture, and look for the process responsible for the traffic.

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