# Listen UDP flows
**URL:** https://discourse.nodered.org/t/listen-udp-flows/35364
**Category:** General
**Created:** [5 November 2020 09:39 UTC](https://discourse.nodered.org/t/listen-udp-flows/35364 "2020-11-05T09:39:28Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@rparada](https://discourse.nodered.org/u/rparada)
#### Post date: [5 November 2020 09:39 UTC](https://discourse.nodered.org/t/listen-udp-flows/35364/1 "2020-11-05T09:39:28Z")
Hi,
I'm trying to read UDP dataframes (below snap from WS):
The private IP is from the running VB instance and the public one, an external PC.
This is my flow:
`[{"id":"96e009b8.b4f988","type":"tab","label":"Flow 1","disabled":false,"info":""},{"id":"5a9c52e7.691eb4","type":"udp in","z":"96e009b8.b4f988","name":"","iface":"","port":"445","ipv":"udp4","multicast":"false","group":"","datatype":"buffer","x":270,"y":220,"wires":[["f4d208fe.602ed8"]]},{"id":"941f2b66.6ff6e8","type":"debug","z":"96e009b8.b4f988","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":870,"y":580,"wires":[]},{"id":"f4d208fe.602ed8","type":"binary","z":"96e009b8.b4f988","name":"","property":"payload","pattern":"x32,l32f","x":730,"y":440,"wires":[["941f2b66.6ff6e8"]]}]`
How can I capture those dataframes?
Thanks!
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### Author:  [@dceejay](https://discourse.nodered.org/u/dceejay)
#### Post date: [5 November 2020 09:57 UTC](https://discourse.nodered.org/t/listen-udp-flows/35364/2 "2020-11-05T09:57:53Z")
Not quite clear what you are trying to do. You can use the udp nodes if you (node-red) are the target of the udp message - are you 192.168.1.55 ? Or if you are the external PC ?
If not then do you mean you want to try to sniff the packets between those boxes ? In which case maybe try node-red-contrib-pcap node for packet capture - but you may need a) root privileges to access the ports and b) teh adapter may need to be in promiscuous mode.
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### Author:  [@rparada](https://discourse.nodered.org/u/rparada)
#### Post date: [5 November 2020 10:24 UTC](https://discourse.nodered.org/t/listen-udp-flows/35364/3 "2020-11-05T10:24:09Z")
@dceejay, yes, the VB Ubuntu is 192.168.1.55, the one generating the UDP dataframes.
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [4 January 2021 10:24 UTC](https://discourse.nodered.org/t/listen-udp-flows/35364/4 "2021-01-04T10:24:20Z")
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