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Re: Layer-2 filtering in NPF
> On 8 Jul 2025, at 10:13 AM, Markus Kilbinger <mk%kilbi.de@localhost> wrote:
>
> 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?
any rule you mean any rule ?? or layer 2 rules .
>
> 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
>>
>>
>>
>>
>>
Emmanuel
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