This should be simple, but for some reason I can't get it working. My present setup: shaw cable modem ----> linux box / iptables ----> airport extreme ----> a happy group of Mac & PCs, some wired, some wireless Problem: My broker supplies me with software for streaming quotes that must run on XP and not be behind a firewall. Solution (I thought): Use my old Allied Telesyn CentreCOM MR815T hub/repeater, and take advantage of the fact that Shaw will issue 2 IPs. shaw cable modem ----> hub port 1 |---------> linux box / iptables ----> etc, as before port 2 |---------> promiscuous XP box If I connect either the network (my present system) or the XP box directly to the cable modem, each seems to work. If I connect either of these through the hub, it no longer works. A diode will light up showing the connection of a PC to a particular port, but will not light up when I plug in the ethernet cable from the cable modem. The hub will indicate activity when an attempt is made to access the internet, but no activity is registered on the cable modem. I have used different ports on the hub, 3 different ethernet cables to connect the modem to the hub, and at times I have rebooted the modem or the PC attached to the hub (various permutations of these actions). The hub has 8 ports - the first 7 are labelled with an "X" which I believe means MDI-X (crossover) configuration to plug a PC into. Port 8 has a switch to select MDI or MDI-X. What should I plug the modem into? (I have tried both). -- Dan Martin, MD GP Hospital Practitioner Computer Scientist ummar143@shaw.ca (204) 831-1746 answering machine always on
Dan Martin wrote:
This should be simple, but for some reason I can't get it working.
Should work. I did it before.
My present setup: shaw cable modem ----> linux box / iptables ----> airport extreme ----> a happy group of Mac & PCs, some wired, some wireless
Essentially your Linux box is a router.
Problem: My broker supplies me with software for streaming quotes that must run on XP and not be behind a firewall.
Solution (I thought): Use my old Allied Telesyn CentreCOM MR815T hub/repeater, and take advantage of the fact that Shaw will issue 2 IPs. shaw cable modem ----> hub port 1 |---------> linux box / iptables ----> etc, as before port 2 |---------> promiscuous XP box
If I connect either the network (my present system) or the XP box directly to the cable modem, each seems to work. If I connect either of these through the hub, it no longer works. A diode will light up showing the connection of a PC to a particular port, but will not light up when I plug in the ethernet cable from the cable modem. The hub will indicate activity when an attempt is made to access the internet, but no activity is registered on the cable modem.
Ah I think I see your problem. You touch on it later.
I have used different ports on the hub, 3 different ethernet cables to connect the modem to the hub, and at times I have rebooted the modem or the PC attached to the hub (various permutations of these actions).
The hub has 8 ports - the first 7 are labelled with an "X" which I believe means MDI-X (crossover) configuration to plug a PC into. Port 8 has a switch to select MDI or MDI-X. What should I plug the modem into? (I have tried both).
You use regular (not crossover) cables in the first seven. Port 8 can use either depending on the position of the switch. Your machines should connect to any of the first seven ports. The cable modem connects to port 8. The other potential problem I can see at this point might be a break in a cable... Later Mike
-- Dan Martin, MD GP Hospital Practitioner Computer Scientist ummar143@shaw.ca <mailto:ummar143@shaw.ca> (204) 831-1746 answering machine always on
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On 20-Dec-08, at 12:43 PM, Mike Pfaiffer wrote:
Dan Martin wrote:
This should be simple, but for some reason I can't get it working.
Should work. I did it before.
My present setup: shaw cable modem ----> linux box / iptables ----> airport extreme ----> a happy group of Mac & PCs, some wired, some wireless
Essentially your Linux box is a router.
Problem: My broker supplies me with software for streaming quotes that must run on XP and not be behind a firewall.
Solution (I thought): Use my old Allied Telesyn CentreCOM MR815T hub/repeater, and take advantage of the fact that Shaw will issue 2 IPs. shaw cable modem ----> hub port 1 |---------> linux box / iptables ----> etc, as before port 2 |---------> promiscuous XP box
If I connect either the network (my present system) or the XP box directly to the cable modem, each seems to work. If I connect either of these through the hub, it no longer works. A diode will light up showing the connection of a PC to a particular port, but will not light up when I plug in the ethernet cable from the cable modem. The hub will indicate activity when an attempt is made to access the internet, but no activity is registered on the cable modem.
Ah I think I see your problem. You touch on it later.
I have used different ports on the hub, 3 different ethernet cables to connect the modem to the hub, and at times I have rebooted the modem or the PC attached to the hub (various permutations of these actions).
The hub has 8 ports - the first 7 are labelled with an "X" which I believe means MDI-X (crossover) configuration to plug a PC into. Port 8 has a switch to select MDI or MDI-X. What should I plug the modem into? (I have tried both).
You use regular (not crossover) cables in the first seven.
To the best of my knowledge, none of my cables are crossover.
Port 8 can use either depending on the position of the switch. Your machines should connect to any of the first seven ports. The cable modem connects to port 8. I assume the switch is set to "MDI" (unlike the "MDI-X" of the other ports, since the modem seems to behave like an "un-PC" in its connectivity - though the computer store guy said to use one of the regular ports). I don't know if this "uplink" port has any other special features other than the ability to select "MDI" vs "MDI-X". Does the hub expect traffic from this port to be directed to the other ports? I don't know if this hub has switching capabilities, but I expected that each port was equivalent to the others.
The other potential problem I can see at this point might be a break in a cable... I tried 3 different cables - one of which I tested and appears to work when used to connect the modem to computer directly.
Later Mike
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Dan Martin GP Hospital Practitioner Computer Scientist ummar143@shaw.ca (204) 831-1746 answering machine always on
I and a friend of mine have done something similar, except we use a 5-port 10/100 switch and not a hub. Also, while Shaw will allow you two IP addresses, you do have to phone their customer service line and tell them you want the second IP address, and only then do they 'enable' it. Kevin On Sat, Dec 20, 2008 at 11:40 AM, Dan Martin <ummar143@gmail.com> wrote:
This should be simple, but for some reason I can't get it working.
My present setup: shaw cable modem ----> linux box / iptables ----> airport extreme ----> a happy group of Mac & PCs, some wired, some wireless
Problem: My broker supplies me with software for streaming quotes that must run on XP and not be behind a firewall.
Solution (I thought): Use my old Allied Telesyn CentreCOM MR815T hub/repeater, and take advantage of the fact that Shaw will issue 2 IPs. shaw cable modem ----> hub port 1 |---------> linux box / iptables ----> etc, as before port 2 |---------> promiscuous XP box
If I connect either the network (my present system) or the XP box directly to the cable modem, each seems to work. If I connect either of these through the hub, it no longer works. A diode will light up showing the connection of a PC to a particular port, but will not light up when I plug in the ethernet cable from the cable modem. The hub will indicate activity when an attempt is made to access the internet, but no activity is registered on the cable modem.
I have used different ports on the hub, 3 different ethernet cables to connect the modem to the hub, and at times I have rebooted the modem or the PC attached to the hub (various permutations of these actions).
The hub has 8 ports - the first 7 are labelled with an "X" which I believe means MDI-X (crossover) configuration to plug a PC into. Port 8 has a switch to select MDI or MDI-X. What should I plug the modem into? (I have tried both).
-- Dan Martin, MD GP Hospital Practitioner Computer Scientist ummar143@shaw.ca (204) 831-1746 answering machine always on
_______________________________________________ Roundtable mailing list Roundtable@muug.mb.ca http://www.muug.mb.ca/mailman/listinfo/roundtable
If you don't have a link light, it doesn't matter how your cable modem is provisioned. You're not connected to it. Fix layer 2 problems before worrying about layer 3. FWIW, I have in the past connected two devices to my cable modem and never had to call Shaw (I don't doubt that some people have had to call, though). Sometimes you have to reboot your cable modem if you're connecting different devices at different times because some of them cache the MAC addresses of your hosts and have a limited space to do so. Sean On Sat, Dec 20, 2008 at 1:25 PM, Kevin McGregor <kevin.a.mcgregor@gmail.com>wrote:
I and a friend of mine have done something similar, except we use a 5-port 10/100 switch and not a hub.
Also, while Shaw will allow you two IP addresses, you do have to phone their customer service line and tell them you want the second IP address, and only then do they 'enable' it.
Kevin
On Sat, Dec 20, 2008 at 11:40 AM, Dan Martin <ummar143@gmail.com> wrote:
This should be simple, but for some reason I can't get it working.
My present setup: shaw cable modem ----> linux box / iptables ----> airport extreme ----> a happy group of Mac & PCs, some wired, some wireless
Problem: My broker supplies me with software for streaming quotes that must run on XP and not be behind a firewall.
Solution (I thought): Use my old Allied Telesyn CentreCOM MR815T hub/repeater, and take advantage of the fact that Shaw will issue 2 IPs. shaw cable modem ----> hub port 1 |---------> linux box / iptables ----> etc, as before port 2 |---------> promiscuous XP box
If I connect either the network (my present system) or the XP box directly to the cable modem, each seems to work. If I connect either of these through the hub, it no longer works. A diode will light up showing the connection of a PC to a particular port, but will not light up when I plug in the ethernet cable from the cable modem. The hub will indicate activity when an attempt is made to access the internet, but no activity is registered on the cable modem.
I have used different ports on the hub, 3 different ethernet cables to connect the modem to the hub, and at times I have rebooted the modem or the PC attached to the hub (various permutations of these actions).
The hub has 8 ports - the first 7 are labelled with an "X" which I believe means MDI-X (crossover) configuration to plug a PC into. Port 8 has a switch to select MDI or MDI-X. What should I plug the modem into? (I have tried both).
-- Dan Martin, MD GP Hospital Practitioner Computer Scientist ummar143@shaw.ca (204) 831-1746 answering machine always on
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-- Sean Walberg <sean@ertw.com> http://ertw.com/
Thanks to all who replied. It appears to be working now. On 20-Dec-08, at 1:58 PM, Sean Walberg wrote:
If you don't have a link light, it doesn't matter how your cable modem is provisioned. You're not connected to it. Fix layer 2 problems before worrying about layer 3.
Thanks Sean - good advice. I switched my configurable port on the hub to MDI, connected to the cable modem, and this time got a link light. I was beginning to think the light wasn't working. I'm sure I've done this configuration before, but one of the cables connects a little loosely. Once I had the link light, it took only seconds to plug the additional cables, and no reboots were required. It just worked! No issues in layer 3. The only thing I'm curious about is how much speed I'm actually losing with a 10base T hub. Dan Martin GP Hospital Practitioner Computer Scientist ummar143@shaw.ca (204) 831-1746 answering machine always on
Since your 10BaseT hub runs at 10 Mbit/s, and Shaw High-Speed Internet (not Extreme) is 5 Mbit/s (downstream), the answer is probably 'not much'. For reference, http://speedtest.shaw.ca/ for me reports 17.4 Mbit/s down, 830 Kbit/s up. I think I've got Extreme-I + PowerBoost (they upgraded me for free for six months). Kevin On Sat, Dec 20, 2008 at 2:43 PM, Dan Martin <ummar143@shaw.ca> wrote:
Thanks to all who replied. It appears to be working now. ...
The only thing I'm curious about is how much speed I'm actually losing with a 10base T hub.
Dan Martin GP Hospital Practitioner Computer Scientist ummar143@shaw.ca (204) 831-1746 answering machine always on
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Kevin McGregor wrote:
Since your 10BaseT hub runs at 10 Mbit/s, and Shaw High-Speed Internet (not Extreme) is 5 Mbit/s (downstream), the answer is probably 'not much'.
For reference, http://speedtest.shaw.ca/ for me reports 17.4 Mbit/s down, 830 Kbit/s up. I think I've got Extreme-I + PowerBoost (they upgraded me for free for six months).
Kevin
As a reference I have 4.7Mbit/sec and 437Kbit/sec for the regular Shaw. A second test showed 5.5Mbit/sec and 438Lbit/sec. Your hub is still faster than Shaw. Of course everything on the other side of your Linux box will remain the same. BTW, Lindsay was thinking of dropping by to see if we could help out in person. Good to see you fixed the problem without us. ;-) Later Mike
On Sat, Dec 20, 2008 at 2:43 PM, Dan Martin <ummar143@shaw.ca <mailto:ummar143@shaw.ca>> wrote:
Thanks to all who replied. It appears to be working now. ...
The only thing I'm curious about is how much speed I'm actually losing with a 10base T hub.
Dan Martin GP Hospital Practitioner Computer Scientist ummar143@shaw.ca <mailto:ummar143@shaw.ca> (204) 831-1746 answering machine always on
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I keep forgetting I have to send this from an alternate address to get through to MUUG: I and a friend of mine have done something similar, except we use a 5-port 10/100 switch and not a hub. Also, while Shaw will allow you two IP addresses, you do have to phone their customer service line and tell them you want the second IP address, and only then do they 'enable' it. Kevin On Sat, Dec 20, 2008 at 11:40 AM, Dan Martin <ummar143@gmail.com> wrote:
This should be simple, but for some reason I can't get it working.
My present setup: shaw cable modem ----> linux box / iptables ----> airport extreme ----> a happy group of Mac & PCs, some wired, some wireless
Problem: My broker supplies me with software for streaming quotes that must run on XP and not be behind a firewall.
Solution (I thought): Use my old Allied Telesyn CentreCOM MR815T hub/repeater, and take advantage of the fact that Shaw will issue 2 IPs. shaw cable modem ----> hub port 1 |---------> linux box / iptables ----> etc, as before port 2 |---------> promiscuous XP box
If I connect either the network (my present system) or the XP box directly to the cable modem, each seems to work. If I connect either of these through the hub, it no longer works. A diode will light up showing the connection of a PC to a particular port, but will not light up when I plug in the ethernet cable from the cable modem. The hub will indicate activity when an attempt is made to access the internet, but no activity is registered on the cable modem.
I have used different ports on the hub, 3 different ethernet cables to connect the modem to the hub, and at times I have rebooted the modem or the PC attached to the hub (various permutations of these actions).
The hub has 8 ports - the first 7 are labelled with an "X" which I believe means MDI-X (crossover) configuration to plug a PC into. Port 8 has a switch to select MDI or MDI-X. What should I plug the modem into? (I have tried both).
-- Dan Martin, MD GP Hospital Practitioner Computer Scientist ummar143@shaw.ca (204) 831-1746 answering machine always on
_______________________________________________ Roundtable mailing list Roundtable@muug.mb.ca http://www.muug.mb.ca/mailman/listinfo/roundtable
participants (6)
-
Dan Martin -
Dan Martin -
Kevin McGregor -
Kevin McGregor -
Mike Pfaiffer -
Sean Walberg