SC0-502 無料問題集「SCP Security Certified Program (SCP)」

（A）Looking at the traffic, you are unable to identify any pattern of attack. You see normal legitimate traffic, the type of which you see every day. The traffic that you have captured provides you no clues as to the current attacks against your network, and as such you make no recommendations to mitigate.

（B）There is a clear attack pattern, where the attacker first is checking to see which hosts will reply to sequential packets, followed by vulnerability checking for the IPLen:20 server vulnerability.
To mitigate these attacks, you recommend reconfiguring the access control lists on the routers, specifically to address the IPLen:20 attack, and to address the sequential packet attack. You recommend that with the router configuration change, the threats will be properly addressed.

（C）There is a clear attack pattern, where the attacker is looking for packets that are formed with a TTL of 128, followed by a TTL of 44. Finally, the attacker is looking to exploit the NOP SackOK vulnerability.
To mitigate these attacks, you recommend implementing a new firewall on the outside of the router, designed with rules to specifically stop these attacks, allowing the rest of the traffic through to your router and the rest of your perimeter defense.

（D）There is a clear pattern of attack, starting with the attacker looking for hosts that will respond to the ID:3 vulnerability. Once identified, the attacker runs a second set of scans, looking for hosts that are vulnerable to a TOS:0x0 attack, and finally running a scan to check for hosts that are vulnerable to the MSS: 1460 NOP attack.
To mitigate these attacks, you recommend implementing a new firewall on the outside of the router, designed with rules to specifically stop these attacks, allowing the rest of the traffic through to your router and the rest of your perimeter defense.

（E）There is a clear pattern of attack, starting with general reconnaissance to see which systems are up and running to respond to attack inquiries. Next, the attacks show port scans, looking specifically for open ports on a unique host, and then moving to searching out NetBus and SubSeven servers.
To mitigate these attacks, you do not recommend any new technology. You feel that your firewall, IDS, and routers will properly address these types of attacks.

（A）You decide to start the configuration on the VPN clients. You create a shortcut on the desktop to connect to the VPN Server. Your design is such that the user will simply double-click the shortcut and the client will make the VPN connection to the server, using PPTP. You do not configure any filters on the VPN client systems.
On the VPN Server, you first configure routing and remote access for the new accounts and allow them to have Dial-In access. You then configure a static IP Address pool for the five remote users. Next, you configure the remote access policy to grant remote access, and you implement the following PPTP filtering:
Inbound Protocol 47 (GRE) allowed Inbound TCP source port 0, destination port 1723 allowed Inbound TCP source port 520, destination port 520 allowed Outbound Protocol 47 (GRE) allowed Outbound TCP source port 1723, destination port 0 allowed Outbound TCP source port 520, destination port 520 allowed

（B）To start the project, you first work on the laptops you have been given. On each laptop, you configure the system to make a single Internet connection to the user's ISP. Next, you configure a shortcut on the desktop for the VPN connection. You design the connection to use L2TP, with port filtering on outbound UDP 500 and UDP 1701. When a user double-clicks the desktop icon you have it configured to make an automatic tunnel to the VPN server.
On the VPN server, you configure the system to use L2TP with port filtering on inbound UDP 500 and UDP 1701. You create a static pool of assigned IP Address reservations for the five remote clients. You configure automatic redirection on the VPN server in the routing and remote access MMC, so once the client has connected to the VPN server, he or she will automatically be redirection to the inside network, with all resources available in his or her Network Neighborhood.

（C）You choose to configure the VPN server first, by installing the VPN High Encryption Service Pack and the HISECVPN.INF built-in security template through the Security Configuration and Analysis Snap-In. Once the Service pack and template are installed, you configure five user accounts and a static pool of IP Addresses for each account.
You then configure the PPTP service on the VPN server, without using inbound or outbound filters due to the protection of the Service Pack. You grant each user the right to dial into the server remotely, and move on to the laptops.
On each laptop, you install the VPN High Encryption Service Pack, to bring the security level of the laptops up to the same level as the VPN server. You then configure a shortcut on each desktop that controls the direct transport VPN connection from the client to the server.

（D）You begin with configuring the VPN server, which is running Windows 2000 Server. You create five new accounts on that system, granting each of them the Allow Virtual Private Connections right in Active Directory Users and Computers. You then configure the range of IP Addresses to provide to the clients as: 10.10.60.100 through 10.10.60.105. Next, you configure five IPSec Tunnel endpoints on the server, each to use L2TP as the protocol.
Then, you configure the clients. On each system, you configure a shortcut on the desktop to use to connect to the VPN. The shortcut is configured to create an L2TP IPSec tunnel to the VPN server. The connection itself is configured to exchange keys with the user ISP to create a tunnel between the user ISP endpoint and the MegaCorp VPN Server.

（E）You configure the VPN clients first, by installing the VPN High Encryption Service Pack. With this installed, you configure the clients to use RSA, with 1024-bit keys. You configure a shortcut on the desktop that automatically uses the private\public key pair to communicate with the VPN Server, regardless of where the user is locally connected.
On the VPN Server, you also install the VPN High Encryption Service Pack, and configure 1024bit RSA encryption. You create five new user accounts, and grant them all remote access rights, using Active Directory Sites and Services. You configure the VPN service to send the server's public key to the remote users upon the request to configure the tunnel. Once the request is made, the VPN server will build the tunnel, from the server side, to the client.

（A）As soon as the office closes Friday, you get to work on the new router configuration. Using your knowledge of the network, and your conversation with the CEO, you build and implement the following router configuration: MegaOne#configure terminal MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 80 MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 20 MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 21 MegaOne(config)#access-list 175 permit tcp any 10.10.0.0 0.0.255.255 established MegaOne(config)#access-list 175 permit ip any 10.10.0.0 0.0.255.255 MegaOne(config)#access-list 175 permit udp any 10.10.0.0 0.0.255.255 MegaOne(config)#access-list 175 permit icmp any 10.10.0.0 0.0.255.255 MegaOne(config)#interface Ethernet 0 MegaOne(config-if)#ip access-group 175 in MegaOne(config)#interface Ethernet 1 MegaOne(config-if)#ip access-group 175 in MegaOne(config-if)#^Z MegaOne#

（B）You backup the current router config to a temp location on your laptop. Friday night, you come in to build the new router configuration. Using your knowledge of the network, and your conversation with the CEO, you build and implement the following router configuration: MegaOne#configure terminal MegaOne(config)#no cdp run MegaOne(config)#no ip source-route MegaOne(config)#no ip finger MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 80 MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 20 MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 21 MegaOne(config)#access-list 175 permit tcp any 10.10.0.0 0.0.255.255 established MegaOne(config)#access-list 175 deny ip 0.0.0.0 255.255.255.255 any MegaOne(config)#access-list 175 deny ip 10.0.0.0 0.255.255.255 any MegaOne(config)#access-list 175 deny ip 127.0.0.0 0.255.255.255 any MegaOne(config)#access-list 175 deny ip 172.16.0.0 0.0.255.255 any MegaOne(config)#access-list 175 deny ip 192.168.0.0 0.0.255.255 any MegaOne(config)#access-list 175 permit ip any 10.10.0.0 0.0.255.255 MegaOne(config)#access-list 175 permit udp any 10.10.0.0 0.0.255.255 MegaOne(config)#access-list 175 permit icmp any 10.10.0.0 0.0.255.255 MegaOne(config)#interface serial 0 MegaOne(config-if)#ip access-group 175 in MegaOne(config-if)#no ip directed broadcast MegaOne(config-if)#no ip unreachables MegaOne(config-if)#^Z MegaOne#

（C）You backup the current router config to a temp location on your laptop. Early Monday morning, you come in to build the new router configuration. Using your knowledge of the network, and your conversation with the CEO, you build and implement the following router configuration: MegaOne#configure terminal MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 80 MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 20 MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 21 MegaOne(config)#access-list 175 permit tcp any 10.10.0.0 0.0.255.255 established MegaOne(config)#access-list 175 permit ip any 10.10.0.0 0.0.255.255 MegaOne(config)#access-list 175 permit udp any 10.10.0.0 0.0.255.255 MegaOne(config)#access-list 175 permit icmp any 10.10.0.0 0.0.255.255 MegaOne(config)#interface Serial 0 MegaOne(config-if)#ip access-group 175 in MegaOne(config-if)#no cdp enable MegaOne(config-if)#no ip directed broadcast MegaOne(config-if)#no ip unreachables MegaOne(config-if)#^Z MegaOne#

（D）You backup the current router config to a temp location on your laptop. Sunday night, you come in to build the new router configuration. Using your knowledge of the network, and your conversation with the CEO, you build and implement the following router configuration: MegaOne#configure terminal MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 80 MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 20 MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 21 MegaOne(config)#access-list 175 permit tcp any 10.10.0.0 0.0.255.255 established MegaOne(config)#access-list 175 permit ip any 10.10.0.0 0.0.255.255 MegaOne(config)#access-list 175 permit udp any 10.10.0.0 0.0.255.255 MegaOne(config)#access-list 175 permit icmp any 10.10.0.0 0.0.255.255 MegaOne(config)#interface Ethernet 0 MegaOne(config-if)#ip access-group 175 in MegaOne(config-if)#no cdp enable MegaOne(config)#interface Ethernet 1 MegaOne(config-if)#ip access-group 175 in MegaOne(config-if)#no cdp enable MegaOne(config-if)#^Z MegaOne#

（E）With the office closed, you decide to build the new router configuration on Saturday. Using your knowledge of the network, and your conversation with the CEO, you build and implement the following router configuration: MegaOne#configure terminal MegaOne(config)#no cdp run MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 80 MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 20 MegaOne(config)#access-list 175 permit tcp any 2.3.57.60 0.0.0.0 eq 21 MegaOne(config)#access-list 175 permit tcp any 10.10.0.0 0.0.255.255 established MegaOne(config)#access-list 175 permit ip any 10.10.0.0 0.0.255.255 MegaOne(config)#access-list 175 permit udp any 10.10.0.0 0.0.255.255 MegaOne(config)#access-list 175 permit icmp any 10.10.0.0 0.0.255.255 MegaOne(config)#access-list 175 deny ip 0.0.0.0 255.255.255.255 any MegaOne(config)#access-list 175 deny ip 10.0.0.0 0.255.255.255 any MegaOne(config)#access-list 175 deny ip 127.0.0.0 0.255.255.255 any MegaOne(config)#access-list 175 deny ip 172.16.0.0 0.0.255.255 any MegaOne(config)#access-list 175 deny ip 192.168.0.0 0.0.255.255 any MegaOne(config)#no ip source-route MegaOne(config)#no ip finger MegaOne(config)#interface serial 0 MegaOne(config-if)#ip access-group 175 in MegaOne(config-if)#no ip directed broadcast MegaOne(config-if)#no ip unreachables MegaOne(config-if)#^Z MegaOne#

（A）The consulting group has identified the steps it will follow in testing the network. You have asked to be kept up to date, and given an approximate schedule of events. You intend to follow along with the test, with weekly reports.
The consultants have decided on a direct strategy. They will work inside the MegaCorp office, with the group introducing themselves to the employees. They will directly interview each employee, and perform extensive physical security checks of the network.
They will review and provide analysis on the security policy, and follow that with electronic testing. They will run a single very robust vulnerability scanner on every single client and server in the network, and document the findings of the scan.

（B）The consulting group has identified the steps it will follow in testing the network. You have asked to be kept up to date, and given an approximate schedule of events. You intend to follow along with the test, with weekly reports.
The consultants will first run remote network surveillance to identify hosts, followed by port scans and both passive and active fingerprinting. They will then run vulnerability scanners on the identified systems, and attempt to exploit any found vulnerabilities. They will next scan and test the router and firewall, followed by testing of the IDS rules.
They will then perform physical surveillance and dumpster diving to learn additional information. This will be followed by password sniffing and cracking. Finally, they will call into MegaCorp to see what information they can learn via social engineering.

（C）The consulting group has identified the steps it will follow in testing the network. You have asked to be kept up to date, and given an approximate schedule of events. You intend to follow along with the test, with weekly reports.
The consultants will start the process with remote network surveillance, checking to see what systems and services are available remotely. They will run both passive and active fingerprinting on any identified system. They will run customized vulnerability scanners on the identified systems, and follow that through with exploits, including new zero-day exploits they have written themselves.
They will next run scans on the router, firewall, and intrusion detection, looking to identify operating systems and configurations of these devices. Once identified, they will run customized scripts to gain access to these devices. Once they complete the testing on the systems, they will dumpster dive to identify any leaked information.

（D）The consulting group has identified the steps it will follow in testing the network. You have asked to be kept up to date, and given an approximate schedule of events. You intend to follow along with the test, with weekly reports.
The consultants surprise you with their initial strategy. They intend to spend nearly 100% of their efforts over the first week on social engineering and other physical techniques, using little to no technology. They have gained access to the building as a maintenance crew, and will be coming into the office every night when employees are wrapping up for the day.
All of their testing will be done through physical contact and informal questioning of the employees. Once they finish that stage, they will run short and direct vulnerability scanners on the systems that they feel will present weakness.

（E）The consulting group has identified the steps it will follow in testing the network. You have asked to be kept up to date, and given an approximate schedule of events. You intend to follow along with the test, with weekly reports.
The first thing the consultants will do is dumpster diving and physical surveillance, looking for clues as to user information and other secret data that should not be outside of the network. Once they have identified several targets through the dumpster diving, they will run scans to match up and identify the workstations for those users.
After identifying the user workstations, they will run vulnerability checks on the systems, to find holes, and if a hole is found they have been given permission to exploit the hole and gain access of the system.
They will attempt to gain access to the firewall and router remotely, via password guessing, and will test the response of the network to Denial of Service attacks. Finally, they will call into MegaCorp to see what information they can learn via social engineering.