I have Windows installed on my laptop, connected to the router wirelessly with IP 192.168.1.5. My desktop is running Linux, connected to the same router (wired) with IP 192.168.1.2. When I do a ping from Windows to Linux, I get a response, but it doesn't work in the other direction. What could be the problem?
This sounds like your Windows firewall is blocking ICMP packets is what the command ping is using to solicit responses from other computers on the network.
I would try to ping the WI-FI router from both systems to confirm that outbound is working against a 3rd machine (which it likely is, since you're getting IP addresses from the router).
Your router is likely to have the IP address 192.168.1.1 so I'd try pinging that.
From windows:
$ ping 192.168.1.1
From Linux:
$ ping 192.168.1.1
If these work then it's highly likely that the Windows firewall is to blame here for blocking your ping attempts.
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