Tutorial
Fedora 11 external network and internal network
Scenario / Question:
I have a computer connected to external network with one network card and connected to internal network with another network card. I want to have all external traffic use one nic and all internal traffic use another nic.
Solution / Answer:
If you do not require NAT or Masquerade then you only have to change your routes. This can be done with the NetworkManager applet.
Change Routes with Gnome NetworkManager
Right click NetworkManager icon in task tray.
Select “Edit Connections…”
Select the Internal Network card connection (System eth0)
Click “Edit” on the right menu
Select the “IPv4 Settings” Tab
Click “Routes…”
Click check box “Use this connection only for resources on its network”
Click “OK”
Click “Apply”
Disable and Re-Enable Networking
Right click NetworkManager icon in task tray
Uncheck “Enable Networking” (disables networking)
Check “Enable Networking” (re-enables networking)
Confirm Changes
# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 200.80.70.40 * 255.255.255.248 U 1 0 0 eth1 192.168.1.0 * 255.255.255.0 U 1 0 0 eth0 default 200.80.70.40 0.0.0.0 UG 0 0 0 eth1
All internal traffic will go through eth0 on network 192.168.1.0
All other (external) traffic will go through eth1 default gateway 200.80.70.40
