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Index: I

ICA (Independent Computing Architecture): 2.5.2. Remote Graphic Interfaces for Microsoft Operating Systems
18.3.3. Independent Computing Architecture (ICA)
ICMP (Internet Control Message Protocol): 2.9.3. Network Diagnostics
4.3.3. ICMP
22.4. ICMP and Network Diagnostics
echo: 22.4.1. ping
22.4.1. ping
(see also ping)
packets: 22.4.3. Other ICMP Packets
returning error codes: 8.3.2. Returning Error Codes
ICMP Router Discovery Protocol (IRDP): 22.2.4. Router Discovery/ICMP Router Discovery Protocol (IRDP)
ICP (Internet Cache Protocol): 15.5.1. Internet Cache Protocol (ICP)
ICQ: 19.2. ICQ
IDEA (International Data Encryption Algorithm): C.5.1. Encryption Algorithms
identd: 21.9. Auth and identd
Igateway program: 9.2.1. Using Proxy-Aware Application Software for Proxying
IGMP (Internet Group Management Protocol): 22.2.3. Internet Group Management Protocol (IGMP)
IIOP (Internet Inter-Orb Protocol): 14.5. Common Object Request Broker Architecture (CORBA) and Internet Inter-Orb Protocol (IIOP)
ImagePath registry key: 12.4.1.1. Registry keys
IMAP (Internet Message Access Protocol): 2.3.1. Electronic Mail
16.7. Internet Message Access Protocol (IMAP)
immutable attribute (BSD 4.4-Lite): 11.5.3. Mount Filesystems as Read-Only
inbound packets: 8.2.2. Be Careful of "Inbound" Versus "Outbound" Semantics
filtering rules for: 8.8.6. It Should Apply Rules Separately to Incoming and Outgoing Packets, on a Per-Interface Basis
Telnet: 8.7.2. Inbound Telnet Service
incident response teams: 27.1.5.2. CERT-CC or other incident response teams
27.4.4.2. CERT-CC and other incident response teams
A.5. Response Teams
resources for: A.2.2. info.cert.org
incidents: 13.1. Attacks Against Internet Services
accidental: 1.2.3. Stupidity and Accidents
buffer overflow: 13.2.3. How Well Is the Protocol Implemented?
15.4.1. JavaScript
command-channel attacks: 13.1.1. Command-Channel Attacks
13.1.10. Protecting Services
contacting service providers about: 27.4.4.3. Vendors and service providers
data-driven attacks: 13.1.2. Data-Driven Attacks
13.1.10. Protecting Services
denial of service: 13.1.9. Denial of Service
13.1.10. Protecting Services
ICMP and: 22.4. ICMP and Network Diagnostics
detecting, plan for: 27.4.1. Planning for Detection
documenting system after: 27.1.6. Snapshot the System
planning for: 27.4.5. Planning for Snapshots
email viruses: 16.1.2.2. Viruses and other hostilities
evaluating, plan for: 27.4.2. Planning for Evaluation of the Incident
factoring attacks: 14.1.1. Sun RPC Authentication
false authentication of clients: 13.1.4. False Authentication of Clients
13.1.10. Protecting Services
hijacking: 13.1.5. Hijacking
13.1.10. Protecting Services
SSH protection against: 18.2.5.5. SSH session hijacking protection
intrusions: 1.2.1.1. Intrusion
IP spoofing: 4.8.3. IP Spoofing
man-in-the-middle forgery: 8.6.1. Risks of Filtering by Source Address
multiple failed logins: 26.2.4. The Good, the Bad, and the Ugly
notifying people of: 27.1.5. Make "Incident in Progress" Notifications
27.4.4. Planning for Notification of People Who Need to Know
packet sniffing attacks: 4.8.4. Packet Interception
13.1.6. Packet Sniffing
13.1.10. Protecting Services
password attacks: 21.3.1. One-Time Password Software
playback attacks: 13.1.4. False Authentication of Clients
port scanning: 4.8.1. Port Scanning
practicing drills for: 27.5.7. Doing Drills
recovering from: 27.1.7. Restore and Recover
planning for: 27.4.6. Planning for Restoration and Recovery
replay attacks: 13.1.8. Replay
13.1.10. Protecting Services
responding to: 26.2.6. Responding to Attacks
27. Responding to Security Incidents
reviewing, strategies for: 27.4.8. Periodic Review of Plans
social manipulation: 2.3.1. Electronic Mail
third-party attacks: 13.1.3. Third-Party Attacks
13.1.10. Protecting Services
tools and supplies for: 27.5.5. Keeping a Cache of Tools and Supplies
Trojan horse, ICMP and: 22.4. ICMP and Network Diagnostics
types of: 1.2. What Are You Trying to Protect Against?
using SSH: 18.2.5. Secure Shell (SSH)
weak TCP/IP implementations, exploiting: 4.8.2. Implementation Weaknesses
Independent Computing Architecture (see ICA)
18.3.3. Independent Computing Architecture (ICA)
independent screened subnet: 6.4.2. Independent Screened Subnets
inetd process: 11.3.3. Which Services Should You Leave Enabled?
modifying for anonymous FTP: 17.1.4.1. Limiting access to information
services started by: 11.3.1.2. Services started by inetd
information lookup services: 20.7. Information Lookup Services
information theft: 1.2.1.3. Information theft
espionage: 1.2.2.4. Spies (industrial and otherwise)
init process: 11.3.3. Which Services Should You Leave Enabled?
insecure networks: 6.7.2. Insecure Networks
installing
filesystems as read-only: 10.10.6.2. Mount filesystems as read-only
11.5.3. Mount Filesystems as Read-Only
kernel: 11.5.1. Reconfigure and Rebuild the Kernel
operating system: 10.9.1. Start with a Minimal Clean Operating System Installation
services: 10.10.5. Installing and Modifying Services
on Windows NT: 12.5. Installing and Modifying Services
on Unix/Linux: 11.4. Installing and Modifying Services
software on machine: 10.10.6. Reconfiguring for Production
11.5. Reconfiguring for Production
intelligent proxy servers: 9.3.3. Intelligent Proxy Servers
interior gateway protocols (see routing protocols)
interior routers: 6.3.3. Interior Router
24.1. Screened Subnet Architecture
configuring: 24.1.2.1. Interior router
merging
with bastion host: 6.5.4. It's Dangerous to Merge the Bastion Host and the Interior Router
with exterior routers: 6.5.2. It's OK to Merge the Interior Router and the Exterior Router
multiple: 6.5.5. It's Dangerous to Use Multiple Interior Routers
internal
bastion hosts: 10.2.3. Internal Bastion Hosts
firewalls: 6.7. Internal Firewalls
Internet
conferencing services, real-time: 2.6. Real-Time Conferencing Services
connections to unbuilt bastion host: 10.8. Building a Bastion Host
Control Message Protocol (see ICMP)
4.3.3. ICMP
defense in depth: 3.2. Defense in Depth
email over (see email)
logging activity on (see logs)
multiple connections to: 6.5.6. It's OK to Use Multiple Exterior Routers
Protocol (see IP)
Relay Chat (see IRC)
rewalls (see rewalls)
security resource: A.3.6. CERT-Advisory
services (see Internet services)
Internet Cache Protocol (ICP): 15.5.1. Internet Cache Protocol (ICP)
Internet Explorer: 2.2. The World Wide Web
security zones and: 15.2.5. Internet Explorer and Security Zones
Internet games (see Quake computer games)
Internet Group Management Protocol (IGMP): 22.2.3. Internet Group Management Protocol (IGMP)
Internet Inter-Orb Protocol (IIOP): 14.5. Common Object Request Broker Architecture (CORBA) and Internet Inter-Orb Protocol (IIOP)
Internet Message Access Protocol (see IMAP)
16.7. Internet Message Access Protocol (IMAP)
Internet Printing Protocol (IPP): 17.6.3. Other Printing Systems
Internet Relay Chat (see IRC)
Internet services: 2. Internet Services
13. Internet Services and Firewalls
default deny stance: 3.5.1. Default Deny Stance: That Which Is Not Expressly Permitted Is Prohibited
default permit stance: 3.5.2. Default Permit Stance: That Which Is Not Expressly Prohibited Is Permitted
disabling: 10.10. Disabling Nonrequired Services
on Unix: 11.3.2. Disabling Services Under Unix
11.3.4. Specific Unix Services to Disable
on Windows NT: 12.4.1. How Are Services Managed Under Windows NT?
12.4.4. Which Services Should You Leave Enabled?
evaluating risks of: 13.2.1. What Operations Does the Protocol Allow?
filtering by: 8.7. Filtering by Service
installing and/or modifying
on Windows NT: 12.5. Installing and Modifying Services
on Unix: 11.4. Installing and Modifying Services
installing/modifying: 10.10.5. Installing and Modifying Services
intruders
pursuing and capturing: 27.3. Pursuing and Capturing the Intruder
recovering from: 27.1.7. Restore and Recover
revealing DNS information to: 20.1.4.5. Revealing too much information to attackers
reviewing response strategies: 27.4.8. Periodic Review of Plans
slower machines and: 10.3.2. How Fast a Machine?
types of: 1.2.2. Types of Attackers
intrusions (see incidents)
inzider program: 13.3. Analyzing Other Protocols
B.6.4. inzider
IP addresses
in packet filtering rules: 8.4.4. Always Use IP Addresses, Never Hostnames
network address translation: 5.4.2.2. Embedded IP addresses are a problem for network address translation
IP forwarding, disabling: 12.4.6. Turning Off Routing
IP (Internet Protocol): 4.2. IP
fragmentation: 4.2.3. IP Fragmentation
multicasting: 19.6. Multicast and the Multicast Backbone (MBONE)
nested over IP: 4.3.4. IP over IP and GRE
packet layer: 4.1.1.2. IP layer
packet routes to (see traceroute program)
source route option: 4.2.2. IP Options
status and control messages: 4.3.3. ICMP
Version 6 (IPv6): 4.6. IP Version 6
IP security protocol (IPsec): 14.9. IPsec
IP source route option: 4.2.2. IP Options
IP spoofing: 4.8.3. IP Spoofing
ipchains filtering system: 8.9.1. Linux ipchains and Masquerading
masquerading and: 8.9.1.6. Using ipchains (including masquerading)
compared to ipfilter: 8.9.3. Comparing ipfilter and ipchains
ipfilter filtering system: 8.9.2. ipfilter
compared to ipchains: 8.9.3. Comparing ipfilter and ipchains
IPP (Internet Printing Protocol): 17.6.3. Other Printing Systems
IPsec (IP security protocol): 14.9. IPsec
IPsec Policy Agent: 12.4.4. Which Services Should You Leave Enabled?
IRC (Internet Relay Chat): 2.6. Real-Time Conferencing Services
19.1. Internet Relay Chat (IRC)
IRDP (ICMP Router Discovery Protocol): 22.2.4. Router Discovery/ICMP Router Discovery Protocol (IRDP)

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