Still can't connect to LAN

System is
cable modem
Linksys 5 port router
Linksys NIC (in WinXP home boxes, Kingston in Win98SE box)
Various laptops with WinXP (NTFS) or Win98SE (FAT32) or Slax live CD running, plugged into the LAN, on occasion

When I boot Knoppix DVD 4 (from the DVD with a small ext2 partition on HDD for save config), I can't see anyone else on the LAN, I am unable to ping the other machines. I can use the internet in Knoppix (and Slax).

No problem with internet connection. All the Win machines can see each other, and access all the files across the LAN, and access the internet. I would like to connect the Knoppix (or Slax) to the LAN for file backups.

Quote:

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Originally Posted by byrdman

I am unable to ping the other machines. I can use the internet

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My guess is that a firewall issue on the Win boxes is blocking your pings (and other traffic). Can you ping the Linksys router? Can you ping the Knoppix box from the Windows systems?

Can't ping from Win98SE or WinXPSP2 to Linux, don't see router. Firewall for XP is off, I have PCCillin AV and Firewall, I have tried unplugging cable modem, turning off PCCillin and rebooting everything, still can't see each other on the LAN. Nothing will showup in My Network Places or LinNeighbborhood.

Quote:

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Originally Posted by byrdman

Can't ping from Win98SE or WinXPSP2 to Linux, don't see router. Firewall for XP is off, I have PCCillin AV and Firewall, I have tried unplugging cable modem, turning off PCCillin and rebooting everything, still can't see each other on the LAN. Nothing will showup in My Network Places or LinNeighbborhood.

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Open up a terminal window and type the following code:

Code:

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(set -x
ifconfig -a
lsmod
lspci
ping -c 1 localhost
) >& post.txt

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Please post the output from post.txt here.

Regards,
- Robert
http://www.cwelug.org

Quote:

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Originally Posted by byrdman

Can't ping from Win98SE or WinXPSP2 to Linux, don't see router.

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don't see router from Knoppix, or don't even see router from Windows? Either way it makes no sense, but it will help to be very precise here if we are going to spot what is wrong and not make assumptions.

It's time to post all details. Local IP addresses (there is no reason to keep these hidden as they can't be reached by the Interner anyway). Post the output of ifconfig on Knoppix and ipconfig on the Windows boxes. We need IP addresses as well as masks and the rest. And post the model of that Linksys router, and anything else that you can think of that may help. Look over all of the web setup information in the router for clues.

Quote:

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Originally Posted by byrdman

Firewall for XP is off

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You're sure for the XP system that you are not also running the damn Windows firewall, that is turned on by default in SP2? Boy, this sure looks like a firewall issue. Can't be a MAC filter issue in the router or you couldn't get to the Internet.

Quote:

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Originally Posted by byrdman

I have tried unplugging cable modem,

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That one doesn't make much sense to me, since all systems were getting to the Internet just fine. It has to be more local.

Quote:

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Originally Posted by byrdman

still can't see each other on the LAN. Nothing will showup in My Network Places or LinNeighbborhood.

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I'm not concerned about getting networking working yet. There are some issues that it works differently between XP and 98, having both on your system you may need to make a few setting just right to get everyone on the same page. But you are not going to get networking going if you can't even ping, so I would focus on that first.

You are trying to ping the windows boxes (and the knoppix box from windows) by IP address and not by name, are you not? As in ping 192.168.0.100 ? Are you 100% certain that you are using the correct IP addresses?

One thing that you may have to resort to is to watch the low level packet trafic as you try to ping the systems. Knoppix has Ethereal which is great for this purpose. I suspect if you watch an attempted ping from Knoppix you will see the ping packet go out but just never see a response (if you don't see the ping go out then that tells us something is wrong). But I suspect that if you watch the NIC (eth0) with ethereal and then ping the Knoppix system from windows you will see the ping (ICMP) packet come in and the response packet go back out. It would be worth examining the addresses closely in those packets but I still want to think that it will be a Windows firewall issue (although 98 has no default firewall, weakening that theory).

Linksys 5 port router with uplink, model #EZXS55W, NIC Linksys LNE 100T x Version 2.0 Fast, Cable modem is Linksys model BEFCMU10 Ver. 2

Knoppix DVD live

root@1[knoppix]# ifconfig
+ifconfig
eth0 Link encap:Ethernet HWaddr 00:A0:CC:37:0F:8D
inet addr:68.187.92.72 Bcasst:255.255.255.255 Mask:255.255.240.0
inet6 addr: fe80::2a0:ccff:fe37:f8d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 METRIC:1
RX packets:66544 errors:0 dropped:0 overruns:0 frame:0
TX packets:11669 errors:6 dropped:0 overruns:0 carrier:7
collisions:0 txqueuelen:1000
RX bytes:48144556 (45.9MiB) TX bytes:2969069 (2.8MiB)
Interrupt:11 Base address:0x8400

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:46 errors:0 dropped:0 overruns:0 frame:0
TX packets:46 errors:0 dropped:0 overruns:0 carrier:7
collisions:0 txqueuelen:0
RX bytes:2555 (2.4 KiB) TX bytes:2555 (2.4KiB)


WinXP home (SP2, confirmed Windows firewall is off)
c:\ipconfig
Connection-specific DNS Suffix . : eau.wi.charter.com
IP Address . . . . . . . . . . . . . . . : 68.112.201.16
Subnet Mask . . . . . . . . . . . . . . : 255.255.248.0
Default Gateway . . . . . . . . . . . . : 68.112.200.1

[quote="byrdman"]

Quote:

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Originally Posted by byrdman

inet addr:68.187.92.72 Bcasst:255.255.255.255 Mask:255.255.240.0

IP Address . . . . . . . . . . . . . . . : 68.112.201.16
Subnet Mask . . . . . . . . . . . . . . : 255.255.248.0

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Is there something that you want to tell us about your IP addresses? This is very untypical for IP addresses on a Linksys router.

Normally I would expect a user to have one IP address assigned by an ISP, and this address to be shared by the different computers attached to the router. They do this sharing by NAT, the router assigns each computer a private IP address usually in the 192.168.x.y range, where X is usually 0 1 or 2 depending on the router and Y is a range of local ip addresses that the router hands out.

ipconfig and ifconfig should reflect these local private addresses, but they do not, they show public addresses, and two different ones. Also, you seem to be showing two very different public IP addresses 68.187.92.72 and 68.112.201.16 that are no where near being on the same subnet (based on the subnet mask that you show). If you are going to have multiple IP addresses thay should really be on the same sub-net.

Do you buy multiple IP addresses from your ISP? Do you know why your router isn't handing out local 192.168.x.y addresses? When you talk (or ping) from Windows to windows system, what IP addresses are assinged to each system? And I'm still very curious about exactly what you type when you try to ping from each system.

Multiple public addresses might work, but it could well involve all local traffic looped through some part of your ISP's system, greatly slowing throughput. But there is a lot going on here that isn't clear yet.

our system allows 3 IP addresses per customer

Quote:

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Originally Posted by byrdman

our system allows 3 IP addresses per customer

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It may allow you three addresses per customer, but how you are keeping the Linksys router from taking one of those and then assigning local addresses to the computers is the key to this. That plus the 3 addresses you are getting not being on the same sub-net (they should if the computers are to consider each other local).

Well, here's one key to the puzzle - you don't have a router at all!

The Linksys EZXS55W is a switch, not a router. See here.

So you have no router. You have no hardware firewall and the protection that comes with it. You have no NAT and no local private IP addresses. And you have an ISP handing out IP addresses to you that are not on the same subnet, based on the subnet mask that it is using. I'm unclear on how your windows systems talk to each other (you might want to post a traceroute between your xp and your win98 systems).