trying to hook up router on host PC but losing internet... 2

[cmpgeek]

hey yall...
i am setting up a network in myhome and am already having trouble... i followed all the directions step by step, and my DSL LED lights looked good... the power and internet lights were lit on the router, but the only way to get any of the LAN lights to light up on the router was to choose the uplink option...
i am completely new to networking, so i have NO idea what uplinking entails, or how it changes things within the router... all i do know is this is how the connections were done:

phone line from phonejack (with DSL filter) plugged into phone line port on DSL modem...

ethernet cable going from LAN port on modem to the Internet port on the router...

2nd ethernet cable going from 1st port on the router to the ethernet card on the PC...

all the connections are secure, but even with only my PC connected, i am unable to connect to the internet...

if anyone has any suggestions at all i would greatly appreciate it!!!

thanks


my vital stats: Crystal 8.5 / Oracle database / Windows 2000 Professional Edition...
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[Accessdabbler]

There should NOT be a filter on the phone line from the wall to the DSL modem. The only lines that are filtered are the ones going to a phone.

All cables must be straight-thru (not crossover).

 

[cmpgeek]

the DSL has always worked fine with the filter there... i have to have the filter coming off the wall jack because that wall jack also "feeds" into my telephone...



my vital stats: Crystal 8.5 / Oracle database / Windows 2000 Professional Edition...
... always in a state of ... inspiring to some day experience ...

 

[cmpgeek]

the DSL has always worked fine with the filter there... i have to have the filter coming off the wall jack because that wall jack also "feeds" into my telephone...



my vital stats: Crystal 8.5 / Oracle database / Windows 2000 Professional Edition...
... always in a state of ... inspiring to some day experience ...

 

[Accessdabbler]

Sounds like the cable from the router to the PC is a crossover cable. Both ends of the cable must have the same colour sequence.

And again, DSL filters do NOT go on the phone line leading to the modem.

 

[franklin97355]

Accessdabbler is correct. The filters are to remove the high frequency DSL component from lines that go to your analog phones and should not be between the dsl line and the modem. If it worked before that's because they aren't perfect and some of the signal was getting through. It will work better correctly installed.

 

[cmpgeek]

maybe there are different filters, or i am calling them a filter and they are something else... this one plugs into the wall jack and then there are 2 ports off of it... one side is to connect to a telephone and the other one is the side that goes to the modem... anyway, i looked at both the cables and one of them is a cross over cable... (thanks accessdabbler)

i have another ethernet cable, so i am going to try again to set this up in just a few minutes, but can yall please tell me where a cross over cable is used? the term sounds familiar, but i am not sure where i have heard it before...

thanks again !



my vital stats: Crystal 8.5 / Oracle database / Windows 2000 Professional Edition...
... always in a state of ... inspiring to some day experience ...

 

[Accessdabbler]

Crossover cables are used to connect a PC to a PC.

In an RJ45 jack some wires are for send and some for receive. When you plug a PC into a hub or router port, the SEND from the PC must connect to a RECEIVE in the hub (and a RECEIVE in the PC must connect to a SEND). Therefore, the ports on the hub and router are actually different than the port on the PC. A straight cable is used to connect these two ports properly.

If you connect a PC to a PC you end up trying to connect the SEND wires to SEND wires - thus no communication. A crossover cable changes the wires on one end of the cable ONLY. This effectively connects the SEND to the RECEIVE on the other computer.

I think of a PC as having an A port and a hub having a B port. A and B are meant to be plugged into each other. PC to PC means trying to connect A to A (connecting two hubs together would result in B to B!). Thus crossovers are needed in these circumstances.

Finally, many hubs and switches have UPLINK ports. This port is used to connect a hub to another hub. While all ports on the hub are "B", the UPLINK port is wired as an "A". Thus a straight cable is used to run from the UPLINK port to a normal port on the other hub.

 

[cmpgeek]

thanks for explaining that! i used the other ethernet cord and got farther than before - at the install program said it was good to go this time... but i still can not get online, and when i open a command prompt i can ping the router IP address, but get no response from the WAN IP address.

i wish my roommates would have agreed to go wireless... it just seems like that would have been easier...

thanks again accessdabbler & franklin

my vital stats: Crystal 8.5 / Oracle database / Windows 2000 Professional Edition...
... always in a state of ... inspiring to some day experience ...

 

[Accessdabbler]

The router can be configured to disregard Pings to the WAN IP so no response may be normal.

What IP address does your comp get? Anything starting with 169 means you are not getting an address from the router (you should be getting an address in the range 192.168.xxx.xxx). The default gateway address should be the same as the address for the router's LAN side (probably 192.168.xxx.1).

 

[cmpgeek]

the router IP is 192.168.x.x the WAN is 192.168.x.xx
i would imagine it is supposed to get a ping from the WAN address because that is one of the steps in the troubleshooting section of the user guide for the router... it also tells you to ping a common URL like

http://www.yahoo.com

i get no result from that either...

i cant remember what the gateway address is ... but i want to think it was the same...

is it relevant that after several attempts to get the network running, the DSL would not even connect the old way? i had to get out the bellsouth installation CD and install it again before i could connect again...



my vital stats: Crystal 8.5 / Oracle database / Windows 2000 Professional Edition...
... always in a state of ... inspiring to some day experience ...

 

[Accessdabbler]

Your WAN IP is invalid! You can't have a 192.168.xxx.xxx address on the WAN side.

You must get your WAN IP from your ISP. Have you logged into your router and set it to receive an IP from your ISP? Most routers connected to a DSL modem will use a PPPoE setup.

 

[cmpgeek]

I had called them, and at first i dont he was sure what i was asking about... i told him my options were DHCP / a static IP - which i knew i didnt have - or a PPPoE. he mentioned then something about a PPPoE and then started talking about obtaining the IP automatically... so i went back to thinking it was DHCP...

i will try the PPPoE option when i get home tonight...

thanks again!

my vital stats: Crystal 8.5 / Oracle database / Windows 2000 Professional Edition...
... always in a state of ... inspiring to some day experience ...

 

[JinRoh]

Yeah it has to be PPPoe. What brand of router is it?

 

[cmpgeek]

it is from "network everywhere"

my vital stats: Crystal 8.5 / Oracle database / Windows 2000 Professional Edition...
... always in a state of ... inspiring to some day experience ...

 

[bcastner]

"Your WAN IP is invalid! You can't have a 192.168.xxx.xxx address on the WAN side.

You must get your WAN IP from your ISP. Have you logged into your router and set it to receive an IP from your ISP? Most routers connected to a DSL modem will use a PPPoE setup."

Accessdabbler is in error on this point.

This is fairly common in the case of a DSL modem that offers some routing features.

Set your Linksys router to a base LAN address of 192.168.2.1 instead of its default of 192.168.1.1

Reboot your workstations.

 

[cmpgeek]

we finally got it up and running last night, and i resetting the LAN to what bcastner said is what did it...

i just want to say thank you to all of you for your help on this one...

my vital stats: Crystal 8.5 / Oracle database / Windows 2000 Professional Edition...
... always in a state of ... inspiring to some day experience ...

 

[Accessdabbler]

Didn't follow your correction bcastner. By "WAN IP" I meant that his IP could not work on the INTERNET if set to 192.168.x.x. The WAN IP COULD be in the 192.168.x.x range if it were connected to another device that was accessing the internet with an IP address.

Maybe you were telling me that the dsl modem itself had the IP assigned by the ISP? If so, I apologize, I haven't run across a DSL modem that obtains an IP address.

 

[bcastner]

Accessdabbler,

What is happening is that the DSL modem is NAT'ing the IP it hands out with its own DHCP/Nat router.

My preference would be to place the modem in pure "bridge" mode, but without details this is a little hard to do by a forum post.

The alternative is to live with the fact that the modem will present a NAT IP on its interface, and set a non-conflicting address for the LAN side of the router.

That is exactly what my advice above does: the user is double NAT'ed, with non-conflicting network segment addressing.

This is a very common issue with modern modems. Many offer by default a small DHCP/NAT and DNS proxy server. If you gave me exactly the make, model, and serial number of the modem, I could likely advise as to how to force "bridge" mode. But really this is the ISPs chore, specify a DSL bridge modem to start with. Otherwise, double NAT as I explained above. There is no serious penalty to doing so unless you have special needs for remote access or are intending to host a web server. In that circumstance, call your ISP and tell them you want a bridge modem.

 

[cmpgeek]

we finally gave up on the router ... it would connect to the internet finally, but would not connect to hotmail or yahoo mail... Linksys was of no help... someone told us to get a HUB instead of a router so that is where i am now... only now the computers are linked, but the other computers cant access online at all...
i really need a drink...

my vital stats: Crystal 8.5 / Oracle database / Windows 2000 Professional Edition...
... always in a state of ... inspiring to some day experience ...