Linux - NetworkingThis forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.
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Can't ping the Windows machine... this disturbs me/ The Windows firewalls have honestly caused me a lot of head aches - that's not just a Linux fan boy talking. Might be worth seeing if you can disable this for testing temporarily if it's a safe environment.
Personally I'd want to be able to ping the IP addresses of both devices (and the IP of the router). Might be worth checking the arp table if you are seeing any oddities. Will kinda look like this in a Linux:
XXXX$ arp -a
? (192.168.1.1) at 00:24:c4:12:34:56 [ether] on eth0
? (192.168.1.2) at 00:50:7f:12:34:56 [ether] on eth0
and this in Windows:
Interface: 192.168.1.105 --- 0xb
Internet Address Physical Address Type
192.168.1.1 00-24-c4-12-34-56 dynamic
192.168.1.2 00-50-7f-12-34-56 dynamic
I'd be wanting to see everything on the LAN there.
You were able to ping the Ubuntu machine from your XP machine previously. Try this again, and then check your arp tables again on both machines. If not used / machine is rebooted, they can not be there.
If the mac address again isn't appearing in the arp table then generically check your hardware. Otherwise I'd disable an re-enable the Ethernet port hardware in windows and check the drivers.
Otherwise check the device they connected together with. If it's your internet router; it might be worth checking there is no firewall rules between ports.