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OpenVPN Server MAC

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mrgenie

Occasional Visitor
Dear Merlin,

The Router has some issues with the exposing MAC address.

If I want to retrieve the MAC by code (c++, c#, c, etc..)
Example c-sharp: NetworkUtils.GetMacAddress(IPAddress.Parse(172.22.56.1))
it does give a complete different MAC Address then the address I can see on the system status tab.

On the system status tab I can see "LAN MAC address" and "Wireless 5Ghz MAC address" as 50:46:5D:5E:83:B0 and the same MAC with the last hex as B4..
The Wireless 2.4 Ghz shows me the same MAC as the LAN MAC..

However, with I use the networkutils from windows to retrieve the MAC based on the IP.. I get a whole different MAC..

any ideas? Bug?

Windows arp output:
C:\Users\User>arp -a

Interface: 172.22.56.150 --- 0xc
Internet Address Physical Address Type
172.22.56.1 00-ff-74-42-05-c8 dynami
172.22.56.2 c8-60-00-a2-e0-c3 dynami
172.22.56.3 c8-60-00-a2-f0-01 dynami
172.22.56.7 00-15-5d-38-03-03 dynami
172.22.56.254 00-24-01-38-b2-31 dynami
172.22.57.1 00-ff-9f-5c-3c-0b dynami
172.22.58.1 00-ff-7d-ea-1e-e6 dynami
172.22.59.1 00-ff-af-2c-46-86 dynami
172.22.60.1 00-ff-cd-ba-ec-80 dynami
172.22.61.1 00-ff-06-ff-82-64 dynami
172.22.255.255 ff-ff-ff-ff-ff-ff static
224.0.0.2 01-00-5e-00-00-02 static
224.0.0.22 01-00-5e-00-00-16 static
224.0.0.252 01-00-5e-00-00-fc static
239.255.255.250 01-00-5e-7f-ff-fa static
255.255.255.255 ff-ff-ff-ff-ff-ff static

as you can see in the output, the MAC addresses listed on the Asus System Status page are not the ones my devices in the network see
 
Last edited:
I don't fully understand how Asus handles MACs, and have no intention of messing with it and risk breaking a lot of things. There are a few oddities where multiple interfaces have the same MAC, and other places where it generates a whole range of MACs (possibly for guest networks). There's been a few discussions about this a couple of months ago, and there was no final consensus as to how it was supposed to really work.
 
I don't fully understand how Asus handles MACs, and have no intention of messing with it and risk breaking a lot of things. There are a few oddities where multiple interfaces have the same MAC, and other places where it generates a whole range of MACs (possibly for guest networks). There's been a few discussions about this a couple of months ago, and there was no final consensus as to how it was supposed to really work.

That I can understand. But I think the LAN Address should at least show the one accessible over the network, or if not, show a list of the MAC addresses of all the various interfaces. I mean, for a normal system administrator to find out the MAC address can be hard if he/she isn't informed about arp, or programming him/herself.

anyway. I'm still using the 3.0.0.4.246.20 which runs stable..
I saw a long list of improvements in the later firmwares, but are they all stable? If not, what is the latest stable release. Especially concerning openVPN which I use as server on my unit
 
That I can understand. But I think the LAN Address should at least show the one accessible over the network, or if not, show a list of the MAC addresses of all the various interfaces. I mean, for a normal system administrator to find out the MAC address can be hard if he/she isn't informed about arp, or programming him/herself.

anyway. I'm still using the 3.0.0.4.246.20 which runs stable..
I saw a long list of improvements in the later firmwares, but are they all stable? If not, what is the latest stable release. Especially concerning openVPN which I use as server on my unit

All releases should be considered as being stable, unless they are specifically tagged as being Beta (like that was the case for various sub-releases for build 24).

You might want to update to the just released build 25, as OpenVPN performance is much improved. A basic iperf test here between a desktop and the router (through an OpenVPN tunnel) saw throughput increase from 19 MB/s to 22 MB/s.
 

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