I'm currently learning about AFDX networks and one of the main questions I have is the ability to do a mapping and port scanning of them. My understanding is that it is based on UDP connection using vitual links. Would simple tools like nmap and udp_scan work on this type of network?

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    – Ron Maupin
    Aug 14, 2017 at 4:16

1 Answer 1


You need to think about the network layers. Ethernet is a layer-1/2 protocol. IP is at layer-3, and ethernet doesn't care if it carries IPv4, IPX, IPv6, or any other layer-3 protocol. TCP, UDP, etc. are layer-4 protocols, which are on top of a layer-3 protocol.

AFDX is based on IEEE 802.3 (ethernet) at layers 1 and 2, and it should not know anything about what happens in the higher layers. Having said that, the devices connected to the network are very likely to have protections built into them. These protections may prevent such scanning, but that has nothing to do with the protocol itself. For instance, the switches often used will be designed to allow a device to connect to a predefined set of devices.

  • Thank you for your response! So my next step would be looking into the predefined protection for these switches to see if scanning would even be the correct approach.
    – Mrose814
    May 20, 2016 at 14:10
  • Not just the switches, but any devices on the network. The actual hosts connected to the network can have configuration which prevent such tools from working. Those tools are not foolproof, even on a standard ethernet network. For instance, nmap can use a variety of ways to try to discover devices, but it can miss a lot of devices, and configurations such a private VLANs can completely stymie it.
    – Ron Maupin
    May 20, 2016 at 14:15

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