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xerox

3 posts

Wannabe Geek


#2967 14-Dec-2004 22:48
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Ok here's my network...
my system has 2 Nics and a 56K modem.
1st Nic = static public ip address (202.45.45.8 lets say) connected to the LAN which is connected to the internet

2nd Nic= 10.10.10.2 (private ip)
my client machines r connected to this private interface having addresses 10.10.10.1,10.10.10.3 ....so on
modem is connected to the internet through ISP.

So i have two internet adapters (modem and 1st NIC)
wht i wanto achive is tht my client machines cud access the internet through these 2 internet adapters simultanously (ISP load balancing )..
i found a software named NAT32 ,configured it but it lets my clients access the internet through one adapter only at a time lets say modem..when modem is disconnected it doesnt picks up the 1st NIC automatically to let clients access the web through that adapter.
Neither does it lets my clients access the web through both the adapters simultanously..
NAT32 has the capability to let clients access web through both the adapters simultanously, but i cudnt get it configured rightly..
if someone cud guide me step by step ,i'd appreciate tht ..Thnx...sorry for such a detailed msg :-)
Oh and i m using windows 2000 server as the server and prof on clients...
( clients gateway = 10.10.10.100
as NAT32 has a logical interface having ip 10.10.10.100 ,this is default in nat32)

shazz

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jpwise
577 posts

Ultimate Geek


#12334 31-Jan-2005 10:06
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Not really a WiFi related question, but your problem will be centred around default routes. In some situtions you can bind interfaces or use multilink ppp (MLPPP) so you have one virtual interface and hence one route, but if you're working between different ISP's you can't do this.

Whichever connection the request goes out through, the reply must come back through the same link (general rule, outbound IP == inbound IP). This is where your routing becomes a critical factor.

Your only way of doing any form of load balancing in your situation would be to do it manually by selectively routing based on traffic type. ie: surfing (port 80, 443) via one link, other types of traffic via the other (modem). With a complete switchover to the other link if one goes down.

If your software can't route based on traffic type (or at least port) you're pretty well stuck.

You'll find a bit more background information from the linux perspective at http://www.lartc.org
There's a section in there that goes into Multiple Uplinks with regard to routing.

Jp.




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