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Windows 7: Network

23 Oct 2010   #1
EternalRZ

Windows 7 Professional x64
 
 
Network

I'm not sure about how to do this, but...how would i be able to access another computer on a different router to share files...basically i have the router/modem from my ISP and then i am connected to a bridged router, and the computer that i want to access is on the router/modem from the ISP. How do I make this possible? Any help would be appreciated! Thanks!

-Raven


My System SpecsSystem Spec
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24 Oct 2010   #2
zigzag3143

Win 8 Release candidate 8400
 
 

Quote   Quote: Originally Posted by EternalRZ View Post
I'm not sure about how to do this, but...how would i be able to access another computer on a different router to share files...basically i have the router/modem from my ISP and then i am connected to a bridged router, and the computer that i want to access is on the router/modem from the ISP. How do I make this possible? Any help would be appreciated! Thanks!

-Raven
Anything is possible but for us to understand it I thik you may have to draw a picture.

Your computer>>>>>router>>>>>.ISP
His computer>>>>>>>bridged router>>>>>>ISP?????


Is that it?
My System SpecsSystem Spec
24 Oct 2010   #3
EternalRZ

Windows 7 Professional x64
 
 

Okay haha, so I made a diagram, basically how would I get Laptop 1 and 2 to share files between eachother?

-Raven


Attached Images
Network-diagram.png 
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24 Oct 2010   #4
turboscrew

Windows 7 Home Basic 32bit
 
 

Maybe it's the gateway setting?
For laptop 1: route add <laptop2 ip> <bidge router network ip as gateway>
and for laptop 2 vice versa.
My System SpecsSystem Spec
24 Oct 2010   #5
EternalRZ

Windows 7 Professional x64
 
 

Thanks but can you be perhaps a bit more descriptive? Networking isnt my forte (at all) so I guess you could say im a moron when it comes to this sort of thing haha. If its any help, the ISP Router is a 2Wire Router from AT&T and the bridged router is a Linksys WRT54GX4.

Thanks!
My System SpecsSystem Spec
24 Oct 2010   #6
turboscrew

Windows 7 Home Basic 32bit
 
 

The subnetworks under the routers are different?
I just wondered if the blocks to laptop2 are now sent to ISP router and out, when it should be sent to
bridged router.

Let's say yuor ISP router created a subnetwork 10.10.1.1 (all the machines in that network have IP addresses
10.10.1.x). and your bridging router created a subnetwork 10.10.2.1. Let's assume laptop2 has IP addreaa 10.10.2.5 and laptop1 sens it a block with default gateway being 10.10.1.1 it means that addresses not of the form 10.10.1.x are sent to the ISP router to be forwarded out of the subnet. You need to set another gateway to packets going to laptop2 - those should be sent to bridged router (it's ip address in the ISP router's network) so be routed out of the ISP router's network via the bridged router.

The gateway addresses can be set in windows command prompt wit "route add"-command.
Using "pertinent" makes not disappearing on reboots.

I'm not a guru in these things either, so maybe someone with more expertise could tell a better solution, but
I think this is one way to get it to work.
My System SpecsSystem Spec
24 Oct 2010   #7
EternalRZ

Windows 7 Professional x64
 
 

Thanks for the advice...but im still not following...I'm sorry maybe...can you try to elaborate one more time?
My System SpecsSystem Spec
25 Oct 2010   #8
turboscrew

Windows 7 Home Basic 32bit
 
 

You could define a route so that packets to a certain IP address (or range of addresses) are sent to a
certain IP address to be routed further. The command prompt command for creating routes is:

ROUTE ADD [-p] <dest IP> MASK <mask> <gateway IP> [METRIC <metric>] [IF <network card>]

-p makes the route not being removed at reboot
<dest IP> is the IP address of the destination (laptop2)
mask defines the addresses in the same subnetwork
gateway defines the IP address of the device (in this network) that is used for forwarding the packet
out of this network.

You need to be sure that the gateways don't give the same IP addresses if they both have
DHCP enabled.

Think of it this way: each router is connected "at one end" as one device to one network and creates a subnetwork t the other end. The ISP-router has an internet IP address (address in your ISP's network) and
it creates another network (LAN1) to which laptop1 and bridged router are connected. The bridged router has one IP address for the LAN1 and it can create another subnatwork where the laptop2 is connected (LAN2)

To get packets to laptop2 from the laptop1, laptop1 needs to use the bridged router (IP in LAN1) as the gateway for packets to laptop2 (LAN2 IP address).

On laptop1:
ROUTE ADD -p <laptop2 IP address in LAN2> MASK 255.255.255.0 <bridged router IP address in LAN1>
The mask here is a guess (typical value) and it says that the last 8 bits of the IP address differentiate
IP addresses in LAN1. If any other bits are different from the gateway's IP address, the machine is considered to belong to some other subnetwork and the packet is sent to the router to be forwarded on.

(You might want to try without "-p" so that if it doesn't work the next boot removes the route.
If it works, you can use the "-p" after the next boot.)
My System SpecsSystem Spec
25 Oct 2010   #9
EternalRZ

Windows 7 Professional x64
 
 

Ahh, I see now! Thanks for helping me out!
My System SpecsSystem Spec
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