CCIE Security Practice Labs

Section 3.0: ISDN Configuration (7 points)

3.1. Basic ISDN (3 points)

1. Configure ISDN on R2 and R4.

2. Use network 165.1.2.8/30.

3. Advertise ISDN network in Area 1 using strong authentication.

   ISDN information:

   BRI number on R2 is 99047132

   BRI number on R4 is 99047265

   Switch-type = basic-net3

3.2. PPP Callback (4 points)

1. Configure PPP callback using RADIUS server in VLAN2.

2. R2 should call back R4.

3. Configure static NAT translation and conduits on PIX for the AAA server behind R1 to achieve this task, as shown in Figure 6-1.

4. Configure PPP callback client for outbound calls not to send a challenge to the callback server.

5. Configure the callback server to disconnect the call for any unauthorized users; this should happen before the callback sequence occurs.