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2 IPs... 1 Computer

J

JucyTEC

Limp Gawd
Joined
Aug 23, 2002
Messages
228
If my computer has 2 IPs.

1 with firewalled internet
1 with no firewall

How do i make my browser surf on one and not the other?

lets say

Firewalled IP: 5.5.5.5
No Firewall IP: 4.4.4.4

Can firefox or IE be configured to channel through a specific IP?

Thanks in advance.
 
Remove the default gateway configuration from one of the adapters, or change your static routing by doing something such as:

route -p ADD 0.0.0.0 MASK 0.0.0.0 5.5.5.5 METRIC 3
Will permanently (survive reboots) make your default gateway for internet addresses the 5.5.5.5 address.
 
Doing this would defeat the point of being connected to two networks, no traffic will ever get routed to the non-firewalled NIC rendering it useless... may as well just disable it at that point :p
 
archivalbackup said:
Remove the default gateway configuration from one of the adapters, or change your static routing by doing something such as:

route -p ADD 0.0.0.0 MASK 0.0.0.0 5.5.5.5 METRIC 3
Will permanently (survive reboots) make your default gateway for internet addresses the 5.5.5.5 address.
Click to expand...

Yes... I'd like the ability to have my exchange still connected to the intranet/firewalled connection, while allowing my internet to surf using the second IP...

Right now I've been disable/enable manually which of course is extremely tedious.
 
This is of interest to me as well. I've been doing this in a virtual machine because our new VPN shunts all traffic, including my surfing, through the vpn. Right now I'm doing the VPN in the virtual machine and surfing on the other.
 
yeah I'm curious about this too. I use 2 computers, each one has 2 nics so I have a nic from each going to my modem (netopia) then I have a crossover between the 2 for multiplicity. I think windows has been trying to route traffic through the crossover and it's got things going a bit sluggish compared to other computers in the house. I also use the crossover for making full use of the 1gbe since the modem only has 10/100 ports
 
Not easy if you want outside (your subnet) access. You need to specify which IP's go to which interface. We used to do this because we had a room full of one-way satellite internet PC users and the tech support department used them. Instead of dialup modems for the upstream we used a T-1 and fed a group of IP's a different gateway address. The rest came through the sat interface. (call center for hughes network systems).

Another scenario is that you have a webserver that needs local access to a different machine with a database running. You don't want the database on the same subnet as the outside world.

webserver NIC 1 - 192.168.10.25/24 - no gateway assigned
webserver NIC 2 - 66.48.88.79/29 - gateway assigned
database NIC 1 - 192.168.10.24/24 - no gateway assigned

No special config is needed here unless the database is on a different subnet- automagically packets destined for the local subnet are not routed.
 
ok, so I skimmed over this thread and it sounds like people have their networks setup such that the following is true:

One IP set up for outbound traffic (default; goes to internet)
One IP set up for internal traffic


quite simply, put the default gateway on the first NIC.

Then, don't set a default gateway for the second NIC, but instead add routes for all your internal networks using the "route add" command as shown in previous posts. (** routes only needed if there's more than 1 internal network)
 
Gillette said:
Doing this would defeat the point of being connected to two networks, no traffic will ever get routed to the non-firewalled NIC rendering it useless... may as well just disable it at that point :p
Click to expand...

Not true ... anything that is still on the local network, ie the 4.4.4.4 network will still go out that adapter. Check the routing tables. This only affects the default gateway for traffic on an unknown network (internet traffic).

You only need a default gateway if traffic needs to leave the local subnet. You can pull the default gateway and still be able to access all of the local network that is on the same subnet as you are ... otherwise known as a quick and dirty way to disable internet browsing.
 
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