Netwok Troubleshooting

  DoctorButcher 00:23 27 Jan 06

I'm troubleshooting a network...

Friend of mine on BY broadband...

Cable modem is allocated IP address and forwarded to router (DNS, WINS, DHCP all set to - router IP

Devices on network are PC1 (XP Pro, PC2 (XP Pro, XBox (DHCP Enabled), 2nd Router for VoIP ( which allocates secondary IP to PC3 (W2KPro

All devices can see out to the Internet but cannot see each other... any idea why?


  Press Man 01:10 27 Jan 06

Check that all devices IP addresses are in the "trusted zone" in your firewall. Also try "pinging" each device.

  mgmcc 09:46 27 Jan 06

PCs 1 & 2 should "see" each other because they are in the same 192.168.1.x subnet. PC3 is in the separate 192.168.2.x subnet and won't see, or be seen by, PCs 1 & 2 because the Subnet Mask of "masks" the two subnets to keep them separate.

You *MIGHT* get the two subnets to communicate if you are able to change the Subnet Mask *throughout* the network to

This will be dependent on the routers allowing this change in their LAN Subnet Mask in addition to using fixed IP addressing for all network adapters.

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