AnsweredHot!One mac address many local iodresses - device detection

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vusal.d
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2019/02/04 12:06:16 (permalink)
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One mac address many local iodresses - device detection

Can someone explain why this mac address appears every 5 seconds. It is source ip always different. It stopped appearing after I disabled “Device Detection” on LAN interface.
post edited by vusal.d - 2019/02/04 12:28:27

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lobstercreed
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Re: One mac address many local iodresses - device detection 2019/02/04 13:37:27 (permalink) ☼ Best Answerby vusal.d 2019/02/08 23:21:56
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Hi Vusal,
 
Same MAC address on same LAN port (port10) every time, right?  This is the MAC address of whatever router sits inside your firewall.  Since all traffic routes through it, it's the only device the FortiGate has Layer 2 visibility to see.  So whether it's forwarding a packet from 1.2.3.4 or 5.6.7.8 it will always present the same MAC address on the interface facing the firewall.  This is elementary OSI model stuff.  :-)
 
- Daniel
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vusal.d
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Re: One mac address many local iodresses - device detection 2019/02/08 23:22:42 (permalink)
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lobstercreed
Hi Vusal,
 
Same MAC address on same LAN port (port10) every time, right?  This is the MAC address of whatever router sits inside your firewall.  Since all traffic routes through it, it's the only device the FortiGate has Layer 2 visibility to see.  So whether it's forwarding a packet from 1.2.3.4 or 5.6.7.8 it will always present the same MAC address on the interface facing the firewall.  This is elementary OSI model stuff.  :-)
 
- Daniel


Thank you for explanation Daniel. Very helpful
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