Set up a simple router in Linux

Set up a simple router in Linux-Linux Enterprise Application-Linux server application information. The following is a detailed description. Many X servers have built-in routing functions, that is, even Windows series can be built into a simple router.
Vrouters deployed on Unix and Linux have two advantages:

1. The price is relatively low. The routing service can be an auxiliary service of the host.

2. A vro with strong self-control and firewall functions can be set up.

Sco unix contains 3 daemon.

Routed gated irdd supports different protocols.

For example, routed only supports rip.

The routed daemon uses/etc/route ways to initialize static routes.

When the vro is started, routed loads the file and broadcasts its route table.

To find other rip-based routers (which is no different from cisco ).

If you want to set it, you can view the comment of gateways.

The format of each line in the/etc/gateways file is as follows:

Net | host name1 gateway name2 metric val active | passive | external

Val indicates the number of routers that pass through the vro.

Active is the information exchanged with other routers.

Passive is the same as above. It is a non-profit exchange.

Instance:

In the following example, I did this on SCO 5.05 last year.

As I have been very busy recently, please take care of the basic area.

Thank you first. I am very willing to help you with similar network setup problems.

1. Configure two NICs, one of which is 202.23.25.20. Received from the ISP 202.23.25.27.

The other is the Intranet address: 10.10.10.17 Intranet: 10.10.10.16 ~ 30

2. edit/etc/gateways.

Add:

Net 202.23.25.27 gateway 10.10.10.17 metric 1 active

Net 10.10.10.16 gateway 202.23.25.20 metric 1 active

3. inconfig command for setting the IP packet direction.

# Inconfig-v ipforwording 1

# Inconfig-v ipnonlocalsrcroute 1

# Inconfig-v ipsendredirects 1

4 routed process. Write a program in the/etc/rc2.d directory. Add a static route.

Route add default 202.23.25.27

5. Check the configuration.

# Netstate-rn

You can see everything you have done ~

This post is very useful, especially when a proxy-level firewall is set up on this simple router.