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Denis2016-11-01 11:06:55
Network administration
Denis, 2016-11-01 11:06:55

Why does Windows 10 send IP packets destined for the local network to the default gateway?

I noticed an interesting behavior of IP routing in Windows 10.
My computer is connected to a local network and IP 10.10.10.1 is set on it.
The computer is physically connected to the switch, and a router is connected to the same switch, with the address 10.10.10.254.
Accordingly, my router is registered as the default gateway.
At work, I have to set up some equipment that has addresses from the 192.168.0.0/24 network. For this, the address 192.168.0.254/24 is registered on my computer as an additional address and I can connect this equipment to the switch and connect directly to it.
The whole scheme works fine, except for one situation. If I access an address from the network 192.168.0.0/24, which is not on any device, my computer sends 3 ARP REQ packets, and after receiving no response, it sends all packets to the router. Proxy arp is disabled on the router and arp filter is enabled.
What is most interesting, this behavior is observed only on Windows 10. On two different computers. Other computers connected in the same way with Windows 7 and Windows XP work fine.
So the question is: How to make Windows 10 not send local packets to the router?

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2 answer(s)
M
murlogen, 2016-11-01
@murlogen

Go work CIFS/Samba which searches for shared folders/printers on all computers on the local network.
The router is the same ordinary computer in the Windows view.

A
Alexander, 2016-11-01
@NeiroNx

If the problem is in win10, then the network routing service is to blame - I doubt that there is a separate setting for this behavior. This is most likely done to bypass ad blockers or spyware and is therefore not configurable.

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