LAN ARP Packets on WAN port
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When looking at packet captures on the WAN port I am seeing ARP packets from equipment on the LAN network. I am assuming this should not be the case. What might I have set incorrectly?
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Cross-connected your LAN and WAN at layer 2?
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My modem is connected to my pfsense box through a switch on a separate VLAN from the LAN traffic. Apparently that is the issue? Is there any way to completely isolate the bridge connection using the Cisco 3750 switch I am currently using or do I need to physically isolate the connections or is this a serious issue?
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Apparently it's not a separate VLAN.
I would consider traffic on the WAN side that is supposed to be on the LAN side a serious issue, yes.
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Thank you for the help. Apparently I left the ports set to dynamic VLAN assignments instead of setting them to static. Changed that and all is fixed.
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@sjbrandon said in LAN ARP Packets on WAN port:
My modem is connected to my pfsense box through a switch on a separate VLAN from the LAN traffic
Any chance you have a cheap TP-Link switch? They're known for this sort of problem.
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Im am using only Cisco 3750 switches in the network. It was 100% opperator error.