3Com 3C13636 Configuration Manual page 431

3Com Router 3000 Ethernet Family
Configuration Guide
III. Configuration example
1) Configure the router
# Assign an IP address to interface Ethernet 1/0/0.
[3Com] interface Ethernet 1/0/0
[3Com-Ethernet 1/0/0] ip address 10.1.1.1 255.255.255.0
# Configure NAT, allowing the client to access the Internet by using DNS proxy.
[3Com] acl number 2000
[3Com-acl-basic-2000] rule 0 permit source 10.1.1.0 0.0.0.255
[3Com-acl-basic-2000] quit
[3Com] interface Ethernet 1/0/1
[3Com-Ethernet1/0/0] ip address 10.1.2.1 255.255.255.0
[3Com-Ethernet1/0/0] nat outbound 2000
[3Com-Ethernet1/0/0] quit
# Enable DNS proxy.
[3Com] dns-proxy enable
# Configure the IP address of the DNS server.
[3Com] dns server 10.72.66.36
# Configure routing, ensuring that the DNS client and the router are reachable to each
other.
Omitted
2) Configure the PC
Set gateway and DNS server addresses to 10.1.1.1.
3Com Corporation
3-9
Chapter 3 DNS Configuration