LINUX operating system debugging: vro configuration and implementation

LINUX operating system debugging: configuration and implementation of vrouters-Linux Enterprise Application-Linux server application information. For details, see the following. 1. Network Topology
2. IP Address Allocation
CLIENT: 192.168.2.2
Linux server:
Eth0: 192.168.2.1
Eth1: 199.229.194.161
CISCO2514: 202.99.30.66 (valid address)
Squid server:
Eth0: 199.229.194.20
Eth0: 1: 202.99.30.67

3. Purpose:
Through the routing configuration on linux server, CLINET can find the proxy to go to squid server;
Then, go to the INTERNET.

4. configuration on linux server:
1) related commands:
Ifconfig route
2) Nic configuration (linux server ):
# Ifconfig eth0 192.168.2.1 netmask 255.255.255.0
# Ifconfig eth1 199.229.194.161 netmask 255.255.255.0
3) configure the route:
# Route add? Net 192.168.2.0/24 gw 192.168.2.1 dev eth0
# Route add? Net 199.229.194.0/24 gw 199.229.194.0/24 dev eth1
# Route add default gw 199.229.194.161
4) set startup
Add the preceding commands to/etc/rc. d/rc. local.
5) simple configuration:
You can start the routed process in setup without the above configurations.

5. configuration on suqid server:
1) related commands:
Ficonfig route
2) Nic Configuration:
# Ifconfig eth0 199.229.194.20 netmask 255.255.255.0
# Ifconfig eth0: 1 202.99.30.67 entmask limit 255.0
3) configure the route:
# Route add? Net 192.168.2.0/24 gw 199.229.194.161 dev eth0
# Route add default gw 202.99.30.66
4) squid Server Configuration:
The port number in the file/etc/squid. conf is 81.

6. CLIENT Configuration
Add the proxy SERVER, pointing to port 199.229.194.20 is 81 (consistent with that in dquid server ).

7. Conclusion:
So far, the client can access the Internet through the SQUID server. Technical prerequisites:
1), in the/etc/sysconfig/network file must have one: FORWARD-IPV4 = YES
2) "1" is displayed in/proc/sys/net/ipv4 ".