Wireshark mailing list archives
Wireshark Capture Filter Using Offset
From: "George E Burns" <geburns () ashland com>
Date: Mon, 19 Jul 2010 17:27:09 -0400
Hello, I have a question regarding "capture" filters. Specifically, I need to write a low level filter that will capture dynamic DNS update packets containing the opcode value of 0x05. I know what the offset value is (0x2C and 0x2D) in the payload, but apparently I am missing something when trying to understand the correct "tcp dump" syntax to use as part of the capture filter in Wireshark. Capture Filter: udp[2c] == 28 and udp[2d] == 00 Any input is greatly appreciated! Thanks, geburns -------------------------------------------------- This e-mail contains information which may be privileged, confidential, proprietary, trade secret and/or otherwise legally protected. If you are not the intended recipient, please do not distribute this e-mail. Instead, please delete this e-mail from your system, and notify us that you received it in error. No waiver of any applicable privileges or legal protections is intended (and nothing herein shall constitute such a waiver), and all rights are reserved.
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Current thread:
- Wireshark Capture Filter Using Offset George E Burns (Jul 19)
- Re: Wireshark Capture Filter Using Offset j.snelders (Jul 19)
- Re: Wireshark Capture Filter Using Offset Guy Harris (Jul 19)
- Re: Wireshark Capture Filter Using Offset Guy Harris (Jul 19)
- Re: Wireshark Capture Filter Using Offset Guy Harris (Jul 19)
- Re: Wireshark Capture Filter Using Offset George E Burns (Jul 20)
- Re: Wireshark Capture Filter Using Offset Sake Blok (Jul 20)
- Re: Wireshark Capture Filter Using Offset Guy Harris (Jul 20)
- Re: Wireshark Capture Filter Using Offset Guy Harris (Jul 19)
- Re: Wireshark Capture Filter Using Offset George E Burns (Jul 20)
- Re: Wireshark Capture Filter Using Offset Guy Harris (Jul 20)
- Re: Wireshark Capture Filter Using Offset j.snelders (Jul 19)