Allied Telesis AT-iMG634 - R2 User's Guide download pdf (Page 361)

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101

Security interfaces Security

4-59

iMG/RG Software Reference Manual (IPNetwork Functions)

• An Internal interface is an IP interface that is attached to a network that needs to be protected from the

network attached to the External interface. For example, an interface attached to a private LAN is an inter-

nal interface.

• The External interface is an IP interface that is attached to a network, for example the Internet, containing

hosts that may pose a security threat to hosts on the internal interfaces.

• A DMZ (demilitarized zone) is an IP interface serving a small network that acts as a neutral zone between

the inside network and the outside network. A DMZ is a portion of the local network that is almost com-

pletely open to the external network. There may be some restriction at external access to the DMZ, but

much less than the restriction of access to the internal interface.

To define an IP interface use the IP ADD INTERFACE command. (ref to ip command list)

To define an existing IP interface as a security interface use the SECURITY ADD INTERFACE command.

To s h o w t h e security interfaces currently defined, use the SECURITY LIST INTERFACES command.

Note: Only one external security interface and one DMZ security interface can be defined

Note: Security interfaces must be created before you can configure the majority of the features of the security

package

FIGURE 4-2 Security interfaces on AT-iMG Models

Internal interface

DMZ interface

External interface

Internal interface

External

Network

Internal

Network

DMZ

Network

Internal

Network

Internal

Network

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