Router : Clients cannot communicate with each other.

Colorful Life

Distinguished
Apr 6, 2013
26
1
18,535
I have a D LInk DSL Router : DSL-2730U.

Wired and wireless clients connect just fine. But cannot communicate with each other...

But when I ping :

ping 192.168.1.12

Pinging 192.168.1.12 with 32 bytes of data:
Reply from 192.168.1.10: Destination host unreachable.
Reply from 192.168.1.10: Destination host unreachable.
Reply from 192.168.1.10: Destination host unreachable.
Reply from 192.168.1.10: Destination host unreachable.

Ping statistics for 192.168.1.12:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss)

When I ping the same system I am on :

ping 192.168.1.10

Pinging 192.168.1.10 with 32 bytes of data:
Reply from 192.168.1.10: bytes=32 time<1ms TTL=128
Reply from 192.168.1.10: bytes=32 time<1ms TTL=128
Reply from 192.168.1.10: bytes=32 time<1ms TTL=128
Reply from 192.168.1.10: bytes=32 time<1ms TTL=128

Ping statistics for 192.168.1.10:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss)
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

I have configured DMZ and even port forwarding to no avail.

How can I get my devices to connect locally using the LAN but not the WAN?
 

Colorful Life

Distinguished
Apr 6, 2013
26
1
18,535


Yes, there is "User Isolation" in the Advanced WiFi settings which I turned off.

Wired to Wireless, Wireless to Wireless and Wired to Wired. None of them can connect to each other.