Wireshark mailing list archives
Re: capture traffic to PLC
From: Shawn T Carroll <shawnthomascarroll () yahoo com>
Date: Sat, 21 Apr 2012 15:32:22 -0400
Look at the source Mac addresses you see, and don't see. That should indicate whether the hub is really a switch, OR that you're only seeing packets on one direction, but not the other. Feel free to pull the "hub" out and test it separately if needed. Sent from a device that fits in my pocket and has no real keyboard. On Apr 21, 2012, at 3:07 PM, Phil Paradis <phil.paradis () unitedtote com> wrote:
Are you sure it's a hub and not a switch? I've seen so-called "hubs" that were actually switches. -- Phil Paradis | Network Administrator | Churchill Downs, Inc. | 700 Central Ave | Louisville KY | +1 502 509 7445 On 4/21/12 11:25 AM, "Marius-Simion Cristea" <cristea12 () yahoo com> wrote:Hi, I want to capture the traffic (the commands) that are sent from a SCALANCE touch panel emulator to a PLC. The configuration of my network looks like this: Emulator---HUB---Scalance_Switch---PLC | PC (Wireshark) I'm giving commands to the PLC from the emulator, the PLC responds, but I can't capture any of those commands using Wireshark, i'm seeing only ARP, LLDP, PN-DCP packets and some other broadcast packets. Is it possible to capture those commands using Wireshark? if so, what am I doing wrong? because, as far as I know the hub must send all the packets that are meant for the PLC also to the PC. Thanks! __________________________________________________________________________ _ Sent via: Wireshark-users mailing list <wireshark-users () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-users Unsubscribe: https://wireshark.org/mailman/options/wireshark-users mailto:wireshark-users-request () wireshark org?subject=unsubscribeThis Churchill Downs Incorporated communication (including any attachments) is intended for the use of the intended recipient(s) only and may contain information that is confidential, privileged or legally protected. Any unauthorized use or dissemination of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by return e-mail message and delete all copies of the original communication. Thank you for your cooperation. ___________________________________________________________________________ Sent via: Wireshark-users mailing list <wireshark-users () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-users Unsubscribe: https://wireshark.org/mailman/options/wireshark-users mailto:wireshark-users-request () wireshark org?subject=unsubscribe
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Current thread:
- capture traffic to PLC Marius-Simion Cristea (Apr 21)
- Re: capture traffic to PLC Phil Paradis (Apr 21)
- Re: capture traffic to PLC Shawn T Carroll (Apr 21)
- Re: capture traffic to PLC Marius-Simion Cristea (Apr 23)
- Re: capture traffic to PLC Sake Blok (Apr 23)
- Re: capture traffic to PLC Shawn T Carroll (Apr 21)
- Re: capture traffic to PLC Phil Paradis (Apr 21)
- Re: capture traffic to PLC David H. Lipman (Apr 23)
- Re: capture traffic to PLC David H. Lipman (Apr 26)