There are several steps you must take to plan how DHCP should be
set up for your network.
Setting up DHCP can be a time-consuming and error-prone process
if you have not taken the time to plan how your DHCP server should be configured.
By taking time to think about your network setup and security concerns in
advance, you can configure your DHCP server more efficiently. The following
topics pose some important questions that you should consider before you configure
DHCP in your network.
- Network topology considerations
- You can plan for the majority of the DHCP setup just by looking at your
network topology, the devices on the network (for example, routers), and how
you want to support your clients in DHCP.
- Security considerations
- The DHCP protocol is not capable of verifying that clients requesting
IP addresses are authorized to do so. Because of the nature of DHCP's interaction
to the network, it is important that you secure your iSeries™ server from outside clients.
If your DHCP server is on an iSeries server that is part of a trusted internal
network, you might be able to use Packet rules (filtering and NAT) to further secure it
from any unauthorized parties. If your DHCP server is on an iSeries server
that is attached to an untrusted network, such as the Internet, refer to iSeries and
Internet security. For more security references, see the Security topic
in the information center.