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Re: Layer-2 filtering in NPF
Hi!
Thanks for your work and effort!
I'm using npf on interfaces with changed mac addresses because the
initial one is set to '00:00:00:00:00:00' on a FriendlyElec NanoPC T6:
rge0 at pci1 dev 0 function 0: vendor 10ec product 8125 (rev. 0x05)
rge0: interrupting at irq 272
rge0: HW rev. B
rge0: Ethernet address 00:00:00:00:00:00
-> ifconfig rge0 link 08:01:25:fd:bf:d5 active
ifconfig rge0
rge0: flags=0x8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ec_capabilities=0x3<VLAN_MTU,VLAN_HWTAGGING>
ec_enabled=0x2<VLAN_HWTAGGING>
address: 08:01:25:fd:bf:d5
media: Ethernet autoselect (1000baseT full-duplex)
status: active
link 00:00:00:00:00:00
With this setting activating any npf rule (after import of your new
layer-2 functionality) breaks / stops network connectivity completely!
Is there a chance to get this scenario working again with npf?
Regards, Markus
Am Mi., 2. Juli 2025 um 16:13 Uhr schrieb Emmanuel Nyarko
<emmankoko519%gmail.com@localhost>:
>
> Hi tech-net,
>
> Layer 2 filtering in NPF has been merged. man updated.
>
> Follows a simple
>
> group name direction interface layer-2 {
> pass_or_block ether direction interface from src_MAC to dst_MAC type Ex(4 hex for ether_type)
> }
>
> groups without layer-2 labels have the layer 3 bit set in the attribues automatically (so it doesn’t break existing configurations)
> so no need to set layer-3 label. layer 2 default group isn’t mandatory until you include a layer 2 group. so your existing configs are safe.
>
> reviewing policy based routing(force a packet to a particular interface) next.
>
> anyone in desperate need of any feature, let me know. i can do my best to finish it quickly.
>
>
> Emmanuel
>
>
>
>
>
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