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SubjectRe: [PATCH net-next v4 0/5] Add support for locked bridge ports (for 802.1X)
On Tue, 22 Feb 2022 14:28:13 +0100 Hans Schultz wrote:
> This series starts by adding support for SA filtering to the bridge,
> which is then allowed to be offloaded to switchdev devices. Furthermore
> an offloading implementation is supplied for the mv88e6xxx driver.
>
> Public Local Area Networks are often deployed such that there is a
> risk of unauthorized or unattended clients getting access to the LAN.
> To prevent such access we introduce SA filtering, such that ports
> designated as secure ports are set in locked mode, so that only
> authorized source MAC addresses are given access by adding them to
> the bridges forwarding database. Incoming packets with source MAC
> addresses that are not in the forwarding database of the bridge are
> discarded. It is then the task of user space daemons to populate the
> bridge's forwarding database with static entries of authorized entities.
>
> The most common approach is to use the IEEE 802.1X protocol to take
> care of the authorization of allowed users to gain access by opening
> for the source address of the authorized host.
>
> With the current use of the bridge parameter in hostapd, there is
> a limitation in using this for IEEE 802.1X port authentication. It
> depends on hostapd attaching the port on which it has a successful
> authentication to the bridge, but that only allows for a single
> authentication per port. This patch set allows for the use of
> IEEE 802.1X port authentication in a more general network context with
> multiple 802.1X aware hosts behind a single port as depicted, which is
> a commonly used commercial use-case, as it is only the number of
> available entries in the forwarding database that limits the number of
> authenticated clients.
>
> +--------------------------------+
> | |
> | Bridge/Authenticator |
> | |
> +-------------+------------------+
> 802.1X port |
> |
> |
> +------+-------+
> | |
> | Hub/Switch |
> | |
> +-+----------+-+
> | |
> +--+--+ +--+--+
> | | | |
> Hosts | a | | b | . . .
> | | | |
> +-----+ +-----+
>
> The 802.1X standard involves three different components, a Supplicant
> (Host), an Authenticator (Network Access Point) and an Authentication
> Server which is typically a Radius server. This patch set thus enables
> the bridge module together with an authenticator application to serve
> as an Authenticator on designated ports.
>
>
> For the bridge to become an IEEE 802.1X Authenticator, a solution using
> hostapd with the bridge driver can be found at
> https://github.com/westermo/hostapd/tree/bridge_driver .
>
>
> The relevant components work transparently in relation to if it is the
> bridge module or the offloaded switchcore case that is in use.

You still haven't answer my question. Is the data plane clear text in
the deployment you describe?

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