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Thread ID: 56602	2005-04-09 23:39:00	Understanding Wireless	thepom (7654)	Press F1

Post ID	Timestamp	Content	User
343308	2005-04-09 23:39:00	:confused: It's the IP numbers I'm confused about Can someone help me to understand a configuration I have please. I installed this at my mates place. It only took me 20mins to put in but I'm blowed if I can understand the Belkin GUI that's shows the setup. So, I'll explain it here and hope someone will help me please :) He has Jetstream with a D-Link 504G modem and a Belkin F5D7230 4port wireless router. The status window shows : 1 - Version Info 2 - Features 3 - Internet Settings 4 - LAN settings It's the final two things I'm confused about. 3 - Internet settings. There's a number of things here : a] MAC address - I follow this ok b] Connection Type - this is set to Dynamic. As I understand it shoud be PPPoE. Am I correct and if so then how come it works under Dynamic? If I had a modem/router device, then would this be set to PPPoA? c] Subnet mask - now this really throws me. It is set to 255.0.0.0 and the LAN settings are on 255.255.255.0 I thought that networks needed to be on the same subnet? d] Wan IP - another thing that fools me. It is set to 10.1.1.4 and.... e] Default Gateway - 10.1.1.1 f] DNS address - 10.1.1.1........ all three of these last IP's which are no where near the LAN Setting IP of 192.168.2.1 I am assuming the above settings all pertain to the modem? 4 - LAN Settings a] LAN/WLAN MAC - there are two addresses here. Why two? Is one the NIC and one the router? If so, which is which? b] IP address - as I said above. This is the default 192.168.2.1 I follow this ok c] As I said above, this is 255.255.255.0 I follow this ok too. d] DHCP Server - shows 'enabled'. I follow this ok I am assuming the above settings all pertain to the router? Now to the laptop. I set the ip to 192.168.2.4 and I could connect to the PC ok but not see the world. It took me 5mins to figure I needed to input Xtra's DNS addresses in order to see the world through the modem. Something else. When I ipconfig, why can I not see the IP addresss assigned by Xtra to the modem. And, how do I get to see that address? Finally, the cool HP laptop had a Wireless key which I pressed. A light came up on the laptop keyboard showing wireless was working. At least i think this is what it was for. I dodn't try the whole thing without pressing this key. So- why do HP have such a key, what's it for and why do other laptops not have this key and yet network ok? Phew....I know there's a lot here but I need some help as I really want to understand what's going on. I do have a some knowledge but like to understand the little things. I'm a visual learner and have searched everywhere for a diagram / tutorial that will help, but nothing to date. Cheers :D	thepom (7654)
343309	2005-04-10 03:53:00	Both the 10.X and 198.x IP addresses are non-routable (internal only) LAN addresses. I'd guess that it actually has two LANs ... one the DMZ which contains a firewall, a DHCP server, and the modem, and the other containing your computer(s) connecting wirelessly to the router. The different masks are right for the 10.x and 198.162.2.y subnets. The router routes between the two. That's what routers do. ;) When you do ipconfig, that can only see what is on your side of the firewall. The "public" IP address assigned to you by your ISP is normally visible only from the Internet side. You might be able to access it through the router's configuration procedures. If you are using fixed "198" IP addresses, you might not need the DHCP server running. The laptop with a "wireless" button probably has a factory installed wireless unit. Is it a "Centrino"? The switch is there so it can be turned off and on to save the battery. Other laptops might have add-in wireless interfaces which are on all the time.	Graham L (2)
343310	2005-04-10 05:38:00	Thanks Graham. You made 1 point per paragraph and I understood all but the first point. All my questions have not been answered yet so I hope this isn't too hard a post ! Meanwhile : - what's DMZ ? - specifically, on the LAN settings, what devices do the 2 MAC addresss belong to? You see there are 3 MAC addresses in total. The LAN Settings show two (as discussed here), and the Internet Settings show one. I think the two LAN settings one's are the PC's NIC and the Belkin router. And, the Internet Setting one belongs to the D-Link modem. Am I correct? If I am, this means the modem has an IP address 10.1.1.1? Oh, I'm still confused. Thanks Graham, hope you and others can help further. :eek:	thepom (7654)
343311	2005-04-10 14:08:00	As Graham mentioned, the 10.1.1.1 and the 192.168.2.4 IP addresses are within two of the three available "Private non Routable" address spaces. The MAC addresses can tell you which device they belong to since the first six hexidecimal digits are unique to each manufacturer. If you go to the Vendor/Ethernet (www.coffer.com) site it will give you this information. The DMZ that Graham mentioned is shorthand for De-Militarised Zone. This is an area of your network that is seperated from your private LAN and can be used to put your web or mail servers in. It is also protected by your router's built-in firewall (if it has one) or NAT capability. If the PC is connected directly to the ADSL Modem using DHCP and has a IP of 192.168.2.something then the Belkin Wireless Router should have a similar external address. It's internal one would then be the 10.1.1.1 and if it has DHCP running the laptop should be showing a 10.1.1.something.	Simply_Si (354)
343312	2005-04-11 08:09:00	Thanks Si - but now I'm even more confused . :confused: I went to the site you quoted and discovered that the MAC addressess all belong to the Belkin router . This means there are 3 MAC addresses assigned to the router . How can this be? Look at my initial post - the Internet Settings have one MAC address and the LAN Settings have two MAC addresses . Since all three have their first six hex as 00:30:BD, they all belong to Belkin . The modem is a D-Link . So - I don't follow why this is so? What am I missing please . . . . .	thepom (7654)
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