Destination External Host

TACACS or RADIUS Server

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(A) Exlornal Source is21Bd&£T33

internal Püuter

IOS Firewall IfttftlO.ÎM

IOS Firewall IfttftlO.ÎM

(B) WWW Server

(A) Exlornal Source is21Bd&£T33

tOS Firewall

160.0.1

tOS Firewall

160.0.1

(B) WWW Server

As Figure 16-5 illustrates, the source (A) is using the IP address 192.168.252.135, and the destination is the World Wide Web server (B) located on the internal network at 10.10.10.162. For the purpose of this exercise, NAT is not used for any address space. The Cisco IOS Firewall will require any external host attempting to access 10.10.10.162 to authenticate before allowing access.

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