MAC Address Spoofing
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When you do the initial pfSense wizard, on the WAN interface, it lets you spoof the MAC address. I have two questions about this:
Whatever numbers and letters are entered in there, it says "invalid MAC address", even if it's really copied from another device. Should this error be ignored or what would be accepted?
But it let me proceed with the "invalid MAC"How do you view what the current MAC is after the setup wizard is done. Because if you go under Interfaces->WAN, I don't see it. And if I go back to the wizard again, that page is empty.
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You can see an entered MAC in Interfaces > WAN. It will allow you to enter a MAC there to spoof to if you need it.
Steve
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@jollycloudycheergoose If it says "invalid", you might be entering it wrong.
Make sure you follow this:Enter a MAC address in the following format: xx:xx:xx:xx:xx:xx or leave blank.
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Mmm, I can't replicate that in 22.01 or 22.05 with a valid MAC:
00:11:22:33:44:55 -
@stephenw10 Hey when I go to that
Interfaces >> WANI don't see MAC address listed. It does have it under the Wizard setup though, but I'm not sure if doing it via there messes up my previous other settings
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You don't see this?
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@stephenw10 That is correct, I do NOT see that. On WAN below IPv6 is MTU and MSS.
Then it goes right into the next section, WITHOUT a MAC address line.
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What is your WAN interface? If it's a subinterface type, like a VLAN, you need to spoof the MAC on the parent NIC.
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@stephenw10 WAN is a PPoE connection to ISP Modem
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Right, then you need to assign/enable the parent interface and spoof the MAC there. You don't have to set an IP on the parent though, you leave it set to 'none'.
Steve
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@stephenw10 Do you know where I can find documentation on how to do this?
If I'm using the pfSense firewall now, does that mean that my ISP already saw my real MAC address and whatever spoof I did in the Setup Wizard failed?
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I'm not sure that's detailed anywhere specifically. But it is simple as assigning and enabling the parent interface and setting a MAC there.
The ISP would be able to see the parent interface MAC address if they are looking for it. But since it's a PPPoE connection they probably don't care.Steve
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@stephenw10 I am really struggling to even find the parent interface tab on the pfSense GUI or netgate documentation.
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@jollycloudycheergoose Go to interfaces/assignments.
On the bottom there's a drop down with any available interfaces. Find yours, then click add. -
@jarhead Yes there's the interfaces in the list that I have currently. And I can add one of the other igb ports. If I add this port it is the "parent"? I am confused by the parent concept
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@jollycloudycheergoose Post a screenshot of your WAN settings and your interface assignments page.
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@jarhead login-to-view login-to-view
For security purposes, login credentials/passwords are redacted. Thank-you
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@jollycloudycheergoose Click the green Add button. Then reread the previous instructions above.
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To be clear the pppoe0 interface is running on igb0 as shown. So assign and enable igb0 and set the MAC there.
Steve
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JollyCloudyCheergooselast edited by JollyCloudyCheergoose Jul 13, 2022, 5:20 AM Jul 13, 2022, 5:08 AM
@stephenw10 On this second “Parent“ Interface, I set the IPv4 Configuration to None or DHCP?
I tried using a second router I control as a fake ISP just to test it, by plugging the pfSense’s WAN into my test router.
If the pfSense parent interface is set to DHCP, then it shows up on my test router with the correct MAC! But then the internet doesn’t work when plugged into the Real PpoE ISP.
But if I do the pfSense Parent set to None, then it doesn’t show up on my test router. So how do I know if the PpoE ISP is seeing my bullshit MAC?