Vr2 port doesn't have access to it's DHCP provider

torontob

Hi Everyone,

I have an Alix board with 3 ports on it. Vr0 is dedicated to LAN which provides DHCP. Vr1 is the WAN which obtains public IP from ISP. Vr2 is also WAN which obtains IP from another 3Com router.

I can see the interface on Vr2 is UP and it has obtained IP 192.168.10.70 and it's gateway is 192.168.10.1 but when I go to Diagnostic > Ping I get this:

Ping output:
PING 192.168.10.1 (192.168.10.1) from 192.168.10.70: 56 data bytes

--- 192.168.10.1 ping statistics ---
3 packets transmitted, 0 packets received, 100.0% packet loss

Needless to say that computers on that network can't reach pfsense router which now has the IP address 192.168.10.73 and as you can see I can't even ping to those computers.

In the Vr2 firewall I have the following:

Proto	Source	Port	Destination	Port	Gateway	Schedule	Description	
  TCP	                *	 *	 *	 *	 *	  	                 Allow-All

What else am I missing? That rule should allow anything coming in. Or at least I shouldn't be blocked for pinging to the DHCP provider from Diagnostics > Ping section.

Thanks for the input

torontob

NVM, problem was related to a spoofed MAC address that I picked for that interface (01:01:01:01:01:01) and the 3com router on the other end was smart to not allow any communication.

GruensFroeschli

If it were 00:01:01:01:01:01 it would probably have worked.
The last bit of the first octet is the multicast-bit and should only be set in the destination, but never as source.

torontob

Thanks. Good to know. Learning a new thing everyday.