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Index: H

• - hyphen: Host Name Checking (BIND 4.9.4 and Later Versions) (DNS and Bind)
• H command (sendmail): Defining Mail Headers (TCP/IP Network Administration)
• H flag (Linux routing table): The Routing Table (TCP/IP Network Administration)
• HACK macro (sendmail): sendmail Macros (TCP/IP Network Administration)
• hackers, BIND versions and: BIND Version (DNS and Bind)
• half-duplex mode
• • identifying line speed: Using Input and Output Octets (Essential SNMP)
  • measurements: Using Input and Output Octets (Essential SNMP)
• halt command: rndc and controls (BIND 9) (DNS and Bind)
• hand tools, hardware maintenance: Diagnostic Tools (TCP/IP Network Administration)
• handshaking: Internet Protocol (TCP/IP Network Administration)
• • Transmission Control Protocol (TCP/IP Network Administration)
  • port numbers and: Sockets (TCP/IP Network Administration)
• HANGUP command (chat): chat (TCP/IP Network Administration)
• hard mounts, filesystems: Hard and soft mounts (Managing NFS and NIS)
• hard option (vfstab file): The vfstab and fstab files (TCP/IP Network Administration)
• hard suboption: Rules for mounting replicas (Managing NFS and NIS)
• hardening machines: Building a Bastion Host (Building Internet Firewalls)
• hardware
• • configuration of: What Hardware Configuration? (Building Internet Firewalls)
  • detecting, Solaris reconfigure file and: Using Dynamically Loadable Modules (TCP/IP Network Administration)
  • discovering (see device discovery)
  • distance limitations, subnetting and: Defining the Subnet Mask (TCP/IP Network Administration)
  • emulators: Network Emulators and Simulators (Network Troubleshooting Tools)
  • forcing to send traps: Forcing Your Hardware to Generate Traps (Essential SNMP)
  • hardware errors: Traffic Measurements with netstat (Network Troubleshooting Tools)
  • identifying: Device Identification (Network Troubleshooting Tools)
  • inventories: Documentation (Network Troubleshooting Tools)
  • Linux, device driver installation: Using Dynamically Loadable Modules (TCP/IP Network Administration)
  • load generator devices: MGEN (Network Troubleshooting Tools)
  • maintenance tools: Diagnostic Tools (TCP/IP Network Administration)
  • monitoring (see device monitoring)
  • network interfaces, identifying installed: The device statement (TCP/IP Network Administration)
  • network partitions: Network partitioning hardware (Managing NFS and NIS)
  • OSI Physical Layer: Data Communications Model (TCP/IP Network Administration)
  • routers (see routers)
  • subnetting and: Subnets (TCP/IP Network Administration)
  • swapping: General Approaches to Troubleshooting (Network Troubleshooting Tools)
• hardware considerations
• • NMSs: Hardware Considerations (Essential SNMP)
  • upgrading: Upgrading Your Hardware (Essential SNMP)
• hardware parameter (dhcpd): Configuration Parameters (TCP/IP Network Administration)
• has-old-clients option (named): The options Statement (TCP/IP Network Administration)
• hash functions: Hash Functions (SSH, The Secure Shell)
• • CRC-32 (SSH, The Secure Shell)
  • pre-image-resistance: Hash Functions (SSH, The Secure Shell)
• hash mark (#) for comments: The Host Table (TCP/IP Network Administration)
• hash (sendmail K command value): The sendmail K Command (TCP/IP Network Administration)
• hash-tables: Map files (Managing NFS and NIS)
• • blocks: Map files (Managing NFS and NIS)
• HAUTH process: Hostbased authentication (SSH, The Secure Shell)
• HCLNFSD protocol, PC/NFS and: PC/NFS today (Managing NFS and NIS)
• HDLC (High-level Data Link Control): The Serial Protocols (TCP/IP Network Administration)
• Header (DNS response packets): dig: An Alternative to nslookup (TCP/IP Network Administration)
• header packet: What Does a Packet Look Like? (Building Internet Firewalls)
• header section (DNS messages): Showing the Query and Response Messages (DNS and Bind)
• • DNS Message Format (DNS and Bind)
  • Header Section Format (DNS and Bind)
  • Perl objects for: Header Objects (DNS and Bind)
• HeaderName directive (Apache): Creating a Fancy Index (TCP/IP Network Administration)
• headers
• • capturing: Controlling program behavior (Network Troubleshooting Tools)
  • • Using ethereal (Network Troubleshooting Tools)
  • datagrams: The datagram (TCP/IP Network Administration)
  • • port numbers: Port Numbers (TCP/IP Network Administration)
    • protocol numbers: Protocol Numbers (TCP/IP Network Administration)
  • displaying in packets: Using ethereal (Network Troubleshooting Tools)
  • hping settings: hping (Network Troubleshooting Tools)
  • ICMP parameter problem: Appendix g.3. ICMP Parameter Problem Message Header (TCP/IP Network Administration)
  • IP datagrams: Appendix g.1. IP Datagram Header (TCP/IP Network Administration)
  • MIME: Multipurpose Internet Mail Extensions (TCP/IP Network Administration)
  • • Content-Transfer-Encoding: Multipurpose Internet Mail Extensions (TCP/IP Network Administration)
  • nested IP: IP Version 6 (Building Internet Firewalls)
  • packet filtering: It Should Allow Rules Based on Any Header or Meta-Packet Criteria (Building Internet Firewalls)
  • protocol stack: TCP/IP Protocol Architecture (TCP/IP Network Administration)
  • sendmail: The sendmail Command (TCP/IP Network Administration)
  • • H command: Defining Mail Headers (TCP/IP Network Administration)
    • precedence: Defining Mail Precedence (TCP/IP Network Administration)
  • structure of: Packet characteristics. (Network Troubleshooting Tools)
  • TCP segment: Transmission Control Protocol (TCP/IP Network Administration)
  • • Appendix g.2. TCP Segment Header (TCP/IP Network Administration)
• heartbeat interval: Running Authoritative Name Servers over Dial-on-Demand (DNS and Bind)
• heartbeat-interval option (named): The options Statement (TCP/IP Network Administration)
• heavy debugging, compile-time configuration: Debug output (SSH, The Secure Shell)
• Heisenberg's Uncertainty Principle: Benchmarking (Managing NFS and NIS)
• hello command: Multipurpose Internet Mail Extensions (TCP/IP Network Administration)
• hello (EGP trace option): The egp Statement (TCP/IP Network Administration)
• Hello packets (OSPF): Open Shortest Path First (TCP/IP Network Administration)
• Hello protocol, overview: Interior Routing Protocols (TCP/IP Network Administration)
• help
• • dip: Dial-Up PPP (TCP/IP Network Administration)
  • • The dip Script File (TCP/IP Network Administration)
  • Linux kernel configuration: Linux Kernel Configuration (TCP/IP Network Administration)
• HELP command
• • ESMTP: Multipurpose Internet Mail Extensions (TCP/IP Network Administration)
  • SMTP: Simple Mail Transfer Protocol (TCP/IP Network Administration)
• help for available commands: ndc and controls (BIND 8) (DNS and Bind)
• helpdesks: Sources of Information (Network Troubleshooting Tools)
• h_errno variable: The Resolver Library Routines (DNS and Bind)
• herror routine: The Resolver Library Routines (DNS and Bind)
• Hesiod class: Resource Records (DNS and Bind)
• hesiod (sendmail K command value): The sendmail K Command (TCP/IP Network Administration)
• heterogeneous networks: Protocol Standards (TCP/IP Network Administration)
• Hewlett-Packard printers: Other Printing Systems (Building Internet Firewalls)
• hexadecimal capture: Controlling what's displayed (Network Troubleshooting Tools)
• • Using ethereal (Network Troubleshooting Tools)
  • hping (Network Troubleshooting Tools)
• hexadecimal values, in SSH configuration files: Port number and network interface (SSH, The Secure Shell)
• hexdump analysis tool: Controlling what's displayed (Network Troubleshooting Tools)
• hidden transmission points: pathchar (Network Troubleshooting Tools)
• • bing (Network Troubleshooting Tools)
• hide-password option (pppd): The PPP Daemon (TCP/IP Network Administration)
• hierarchical mounts, automounter: Hierarchical mounts (Managing NFS and NIS)
• • -hosts map: The -hosts map (Managing NFS and NIS)
• hierarchical operation, NIS+ and: NIS+ (Managing NFS and NIS)
• hierarchical realms and Kerberos-4: Kerberos-4 compatibility mode in Kerberos-5 (SSH, The Secure Shell)
• hierarchies, domain naming scheme: Domain names (Managing NFS and NIS)
• High-level Data Link Control (HDLC): The Serial Protocols (TCP/IP Network Administration)
• high-volume end-user (organizational type): Obtaining an official network address (TCP/IP Network Administration)
• higher-level services, filtering: Protocol and port filtering. (Network Troubleshooting Tools)
• hijacking: Hijacking (Building Internet Firewalls)
• • protecting against: Protecting Services (Building Internet Firewalls)
  • • with SSH: SSH session hijacking protection (Building Internet Firewalls)
• hijacking of connections: Connection Hijacking (SSH, The Secure Shell)
• HINFO (Host Information) records: Host Information record (TCP/IP Network Administration)
• • Host Information (DNS and Bind)
  • Types (DNS and Bind)
  • Revealing too much information to attackers (Building Internet Firewalls)
  • query statistics for: BIND 4.9 and 8 statistics (DNS and Bind)
• hint data/hints (see root hints data)
• hints (cache initialization file): The Cache Initialization File (TCP/IP Network Administration)
• historic protocols: Protocol Standards (TCP/IP Network Administration)
• HMAC: Integrity Protection (Building Internet Firewalls)
• • algorithm: Cryptographic Hashes and Message Digests (Building Internet Firewalls)
• HMAC-MD5 algorithm: rndc and controls (BIND 9) (DNS and Bind)
• hmac-sha1: Protocol Differences (SSH-1 Versus SSH-2) (SSH, The Secure Shell)
• h2n name server tool: Other tools (Network Troubleshooting Tools)
• • Sources for Tools (Network Troubleshooting Tools)
• h2n utility: Tools (DNS and Bind)
• • Generating Zone Data Files from the Host Table (DNS and Bind)
  • Forgot to Increment Serial Number (DNS and Bind)
  • transitioning to subdomains and: Managing the Transition to Subdomains (DNS and Bind)
• holdoff option (pppd): The PPP Daemon (TCP/IP Network Administration)
• holdtime parameter (gated): The bgp Statement (TCP/IP Network Administration)
• home directory
• • permissions: Acceptable permissions for user files (SSH, The Secure Shell)
  • security: Remote Home Directories (NFS, AFS) (SSH, The Secure Shell)
• $HOME environment variable: Secure Remote Logins (SSH, The Secure Shell)
• Home map (NNM): Running NNM (Essential SNMP)
• home pages for mrtg graphs: mrtg configuration file (Network Troubleshooting Tools)
• home section (smb.conf file): The smb.conf homes section (TCP/IP Network Administration)
• homogeneity, choosing hosts and: Where Do I Put My Name Servers? (DNS and Bind)
• honesty in network management: Professionalism (Network Troubleshooting Tools)
• hooks in programs: Internal Polling (Essential SNMP)
• • Using Hooks with Your Programs (Essential SNMP)
• hop count, routing: Routing Information Protocol (TCP/IP Network Administration)
• hops
• • limiting number in traceroute: Options (Network Troubleshooting Tools)
  • pathchar results: pathchar (Network Troubleshooting Tools)
  • in route discovery: Path Discovery with traceroute (Network Troubleshooting Tools)
  • in routing tables: netstat (Network Troubleshooting Tools)
  • TTL counts and: Interpreting results (Network Troubleshooting Tools)
• Host: Configuration file sections (SSH, The Secure Shell)
• • using to create nicknames for hosts: Making nicknames for hosts (SSH, The Secure Shell)
• host addresses: IP host addresses (Managing NFS and NIS)
• • The IP Address (TCP/IP Network Administration)
  • (see also IP addresses)
  • assigning: Assigning Host Addresses (TCP/IP Network Administration)
• host-based authentication
• • recommended setting: NFS Security Risks (SSH, The Secure Shell)
  • SSH-2: Hostbased authentication (SSH, The Secure Shell)
  • X Windows: How X authentication works (SSH, The Secure Shell)
• host configuration
• • Microsoft Windows: Microsoft Windows (Network Troubleshooting Tools)
  • system configuration files: System Configuration Files (Network Troubleshooting Tools)
  • utilities: Utilities (Network Troubleshooting Tools)
• host domain name tool: nslookup and dig (Network Troubleshooting Tools)
• • Sources for Tools (Network Troubleshooting Tools)
• Host Information (HINFO) records: Host Information record (TCP/IP Network Administration)
• host-information queries: BIND 4.9 and 8 statistics (DNS and Bind)
• host keys: Known Hosts (SSH, The Secure Shell)
• • The Architecture of an SSH System (SSH, The Secure Shell)
  • Host keys (SSH, The Secure Shell)
  • generating: ssh-keygen (SSH, The Secure Shell)
  • • as ordinary user: Running as an Ordinary User (SSH, The Secure Shell)
    • for server: Server Key Generation (SSH, The Secure Shell)
  • load-balanced servers, problems caused by: Host keys (SSH, The Secure Shell)
  • multiple keys per name, SSH1: Host keys (SSH, The Secure Shell)
  • SSH servers vs. hosts, assignment to: Authentication (SSH, The Secure Shell)
• host lists: Control file details (SSH, The Secure Shell)
• Host Manager, diskless clients and: Setting up a diskless client (Managing NFS and NIS)
• host names
• • checking for conformance: Host Name Checking (BIND 4.9.4 and Later Versions) (DNS and Bind)
  • rules for: Host Name Checking (BIND 4.9.4 and Later Versions) (DNS and Bind)
• host naming, migrating from NIS to DNS: Migrating from NIS to DNS for host naming (Managing NFS and NIS)
• host numbers, IPv4 addresses: IPv4 address classes (Managing NFS and NIS)
• HOST option (xinetd): Controlling Access with xinetd (TCP/IP Network Administration)
• Host Resources MIB: Host Management (Essential SNMP)
• • Host Management Revisited (Essential SNMP)
• host (sendmail K command value): The sendmail K Command (TCP/IP Network Administration)
• host specification: Configuration file sections (SSH, The Secure Shell)
• • with wildcards: Multiple matches (SSH, The Secure Shell)
• host statement (dhcpd): Topology Statements (TCP/IP Network Administration)
• host statements (dhcpd.config file): dhcpd.conf (TCP/IP Network Administration)
• host-statistics option (named): The options Statement (TCP/IP Network Administration)
• host table aliases: Address and Alias Records (DNS and Bind)
• host tables: The History of the Domain Name System (DNS and Bind)
• • The Host Table (TCP/IP Network Administration)
  • email destinations and: DNS and Electronic Mail (DNS and Bind)
  • h2n utility for mapping: Tools (DNS and Bind)
  • limitations of: The Host Table (TCP/IP Network Administration)
  • using instead of DNS: Must I Use DNS? (DNS and Bind)
• host unreachable codes (see ICMP)
• host unreachable message: One name server configured (DNS and Bind)
• host utility
• • obtaining/building: Good Parenting (DNS and Bind)
  • using: Using host (DNS and Bind)
• HOSTALIASES environment variable: Providing Aliases (DNS and Bind)
• host.aliases file: Providing Aliases (DNS and Bind)
• HostDsaKey: Host key files (SSH, The Secure Shell)
• HostKey: Host key files (SSH, The Secure Shell)
• HostKeyFile: Host key files (SSH, The Secure Shell)
• hostkeys directories: Host Keys and Known-Hosts Databases (SSH, The Secure Shell)
• hostkeys map, SSH2: Host keys (SSH, The Secure Shell)
• hostmaster as email address: SOA Records (DNS and Bind)
• HostName: Making nicknames for hosts (SSH, The Secure Shell)
• hostname command
• • default domain name, setting with
  • • primary master name server: Set the local domain name (DNS and Bind)
  • local domain name, setting with: The Local Domain Name (DNS and Bind)
  • setting default domain name with
  • • slave name servers: Setup (DNS and Bind)
• hostname configuration tool: Microsoft Windows (Network Troubleshooting Tools)
• hostname field, NFS client netgroups map: Netgroups (Managing NFS and NIS)
• hostname file (Solaris): Assigning an Address (TCP/IP Network Administration)
• hostname links: Hostname Links (SSH, The Secure Shell)
• • The /usr/hosts Directory (SSH, The Secure Shell)
• hostname option (share command): The share command (TCP/IP Network Administration)
• HostnameLookups directive (Apache): Performance Tuning Directives (TCP/IP Network Administration)
• hostnames: Names and Addresses (TCP/IP Network Administration)
• • aliases: The Host Table (TCP/IP Network Administration)
  • canonical names: The Forward-Mapping Zone File (TCP/IP Network Administration)
  • formats, netgroups: Hostname formats in netgroups (Managing NFS and NIS)
  • locating host tables: The Host Table (TCP/IP Network Administration)
  • netgroups: Using netgroups (Managing NFS and NIS)
  • NIS/DNS: Run NIS on client, enable DNS on NIS server (Managing NFS and NIS)
  • qualified: Fully qualified and unqualified hostnames (Managing NFS and NIS)
  • selecting: Choosing a Hostname (TCP/IP Network Administration)
  • sendmail, class w: Modifying Local Information (TCP/IP Network Administration)
  • share command and: The share command (TCP/IP Network Administration)
  • umountall and: NFS administration tools (Managing NFS and NIS)
  • unqualified: Fully qualified and unqualified hostnames (Managing NFS and NIS)
  • username and: Enabling transparent access (Managing NFS and NIS)
• hostresorder directive: Silicon Graphics' IRIX (DNS and Bind)
• HOSTRESORDER environment variable: Silicon Graphics' IRIX (DNS and Bind)
• hosts: Domains (DNS and Bind)
• • adding/deleting: Adding and Deleting Hosts (DNS and Bind)
  • • Added Name to Zone Data File but Forgot to Add PTR Record (DNS and Bind)
  • addresses: IP host addresses (Managing NFS and NIS)
  • • NFS: Networking Fundamentals (Managing NFS and NIS)
  • bastion: Some Firewall Definitions (Building Internet Firewalls)
  • • Firewalls (TCP/IP Network Administration)
  • choosing: Where Do I Put My Name Servers? (DNS and Bind)
  • configuration (see host configuration)
  • configuring: Configuring Hosts (DNS and Bind)
  • • consequences of: Minimizing Pain and Suffering (DNS and Bind)
    • vendor-specific resolver configurations: Vendor -Specific Options (DNS and Bind)
  • connectivity: Using ping (Network Troubleshooting Tools)
  • CPU utilization and: Capacity Planning (DNS and Bind)
  • determining aliases of: Finding Out a Host's Aliases (DNS and Bind)
  • disambiguating: Updating .rhosts, hosts.equiv, etc. (DNS and Bind)
  • displaying remote X Windows sessions on: vnc (Network Troubleshooting Tools)
  • domain names for: The Domain Name System tutorial (DNS and Bind)
  • domains, binding: NIS domains (Managing NFS and NIS)
  • dual-homed (see dual-homed hosts)
  • files: Files managed under NIS (Managing NFS and NIS)
  • gated configuration: host configuration (TCP/IP Network Administration)
  • grouping, dhcpd.conf file: dhcpd.conf (TCP/IP Network Administration)
  • host authentication: ssh (Network Troubleshooting Tools)
  • host-monitoring tools: What, When, and Where (Network Troubleshooting Tools)
  • • Host-Monitoring Tools (Network Troubleshooting Tools)
    • Microsoft Windows (Network Troubleshooting Tools)
  • identification: Known Hosts (SSH, The Secure Shell)
  • information mismatch, ifconfig: Mismatched host information (Managing NFS and NIS)
  • information records (see HINFO records)
  • link-level addresses: Problems with ping (Network Troubleshooting Tools)
  • listing information with nslookup: nslookup and dig (Network Troubleshooting Tools)
  • local domain name, setting for: Set the local domain name (DNS and Bind)
  • location of, listed in TXT records: General text information (DNS and Bind)
  • loopback addresses: Access control and the loopback address (SSH, The Secure Shell)
  • MAC addresses: Ethernet addresses (Managing NFS and NIS)
  • multi-homed: Routing datagrams (TCP/IP Network Administration)
  • multihomed (see multihomed hosts)
  • multiple: Multiple Services or Multiple Hosts? (Building Internet Firewalls)
  • name collisions and: The History of the Domain Name System (DNS and Bind)
  • names, and netgroups: Netgroups (Managing NFS and NIS)
  • network interface interval for: Interface interval (DNS and Bind)
  • ntop results: Interactive mode (Network Troubleshooting Tools)
  • • Web mode (Network Troubleshooting Tools)
  • peers: Network Services (TCP/IP Network Administration)
  • pinging multiple hosts: fping (Network Troubleshooting Tools)
  • relationships, trusted users and hosts: Trusted hosts and trusted users (Managing NFS and NIS)
  • routing tables: The Routing Table (TCP/IP Network Administration)
  • RP record for: Responsible Person (DNS and Bind)
  • screened (see screened hosts)
  • security of: Host Security (Building Internet Firewalls)
  • sorting traffic display by: Web mode (Network Troubleshooting Tools)
  • speed of: How Fast a Machine? (Building Internet Firewalls)
  • statistics for: BIND 4.9 and 8 statistics (DNS and Bind)
  • traffic capture and: Access to Traffic (Network Troubleshooting Tools)
  • trusted: Trusted hosts and trusted users (Managing NFS and NIS)
  • • Secure the r Commands (TCP/IP Network Administration)
  • values, exports file: The /etc/exports file (TCP/IP Network Administration)
  • victim (see victim hosts)
  • views and: Views (DNS and Bind)
  • virtual (Apache): Defining Virtual Hosts (TCP/IP Network Administration)
• HOSTS = (Distfiles): rdist (TCP/IP Network Administration)
• hosts and host management: Host Management (Essential SNMP)
• • Host Management Revisited (Essential SNMP)
  • host OIDs: Host Management Revisited (Essential SNMP)
  • polling
  • • Net-SNMP: Using Net-SNMP (Essential SNMP)
    • OpenView: Using HP OpenView to Retrieve Values (Essential SNMP)
    • • Designing collections (Essential SNMP)
    • Perl: Retrieving a Single MIB Value (Essential SNMP)
    • • Retrieving Multiple MIB Values (Essential SNMP)
  • in protocol stack: SNMP and UDP (Essential SNMP)
  • querying: snmpdf (Essential SNMP)
  • retrieving hostnames in Perl: Retrieving a Single MIB Value (Essential SNMP)
  • sending traps: Sending Traps (Essential SNMP)
• hosts database, directory services and: The hosts database (Managing NFS and NIS)
• hosts file: The Host Table (TCP/IP Network Administration)
• • The Host Table (TCP/IP Network Administration)
  • bypassing, client: Masters, slaves, and clients (Managing NFS and NIS)
  • empty: Ignoring NIS (DNS and Bind)
  • ifconfig command and: The ifconfig Command (TCP/IP Network Administration)
  • mask values, storing: Assigning a Subnet Mask (TCP/IP Network Administration)
  • modifying, master server: Masters, slaves, and clients (Managing NFS and NIS)
  • nicknames: Map structure (Managing NFS and NIS)
  • NIS: Networking Fundamentals (Managing NFS and NIS)
  • • map: Masters, slaves, and clients (Managing NFS and NIS)
  • NIS maps: Network Information Service (TCP/IP Network Administration)
  • • Network Information Service (TCP/IP Network Administration)
  • outages and: Longer Outages (Days) (DNS and Bind)
• hosts map
• • domains: Managing multiple domains (Managing NFS and NIS)
  • qualified names: Fully qualified and unqualified hostnames (Managing NFS and NIS)
  • RARP server and: Reverse ARP requests (Managing NFS and NIS)
• -hosts map, hierarchical mounts and: The -hosts map (Managing NFS and NIS)
• hosts.allow: Forwarding Security: TCP-wrappers and libwrap (SSH, The Secure Shell)
• • TCP-wrappers Configuration (SSH, The Secure Shell)
  • Notes About TCP-wrappers (SSH, The Secure Shell)
  • tcpd access control files (TCP/IP Network Administration)
• hosts.deny: Forwarding Security: TCP-wrappers and libwrap (SSH, The Secure Shell)
• • tcpd access control files (TCP/IP Network Administration)
• hosts.equiv: Working with the maps (Managing NFS and NIS)
• • Trusted-host access files (SSH, The Secure Shell)
  • shosts access control (SSH, The Secure Shell)
  • recommended setup: Disable Other Means of Access (SSH, The Secure Shell)
  • security considerations: Secure the r Commands (TCP/IP Network Administration)
  • • Looking for Trouble (TCP/IP Network Administration)
  • syntax: Control file details (SSH, The Secure Shell)
  • updating: Updating .rhosts, hosts.equiv, etc. (DNS and Bind)
• hosts.lpd file, security considerations: Looking for Trouble (TCP/IP Network Administration)
• hosts.txt: Directory Name Service (DNS) (Managing NFS and NIS)
• HOSTS.TXT file: The History of the Domain Name System (DNS and Bind)
• • network names and numbers and: Network Names and Numbers (DNS and Bind)
• hot fixes, and services: Installing and Modifying Services (Building Internet Firewalls)
• hourly charts of traffic: cricket (Network Troubleshooting Tools)
• housekeeping: Maintenance Intervals (DNS and Bind)
• • Housekeeping (Building Internet Firewalls)
• HP Extensible SNMP Agent: SNMP Agents (Essential SNMP)
• HP OpenView (see OpenView)
• HP OpenView NNM (see OpenView Network Node Manager)
• HP-UX operating system
• • agent software: SNMP Agents (Essential SNMP)
  • configuring resolvers for: HP's HP-UX (DNS and Bind)
  • NMS suites: NMS Suites (Essential SNMP)
  • • NMS Suites (Essential SNMP)
  • OpenView and: HP OpenView Agent for HP-UX and Solaris (Essential SNMP)
  • supporting software: Supporting Software (Essential SNMP)
  • trend-analysis software: Trend Analysis (Essential SNMP)
  • vendor-specific software: Element Managers (Vendor-Specific Management) (Essential SNMP)
• hping packet tool
• • custom packet generation: Custom Packets Generators (Network Troubleshooting Tools)
  • source website: Sources for Tools (Network Troubleshooting Tools)
  • testing connectivity with: hping (Network Troubleshooting Tools)
  • testing firewalls with: Firewall testing (Network Troubleshooting Tools)
• HS (Hesiod) class: Resource Records (DNS and Bind)
• htdocs directory (Solaris): Configuring Apache on Solaris (TCP/IP Network Administration)
• HTML: The World Wide Web (Building Internet Firewalls)
• • form for sending messages: Using NNM for Communications (Essential SNMP)
  • in MRTG output: Using MRTG (Essential SNMP)
  • • Viewing Graphs (Essential SNMP)
  • paths for files: Viewing Graphs (Essential SNMP)
  • titles on pages: Viewing Graphs (Essential SNMP)
• HTML pages of traffic patterns: mrtg (Network Troubleshooting Tools)
• http-gw proxy: Other TIS FWTK Proxies (Building Internet Firewalls)
• HTTP (Hypertext Transfer Protocol): The World Wide Web (Building Internet Firewalls)
• • The World Wide Web (Building Internet Firewalls)
  • Securing HTTP (Building Internet Firewalls)
  • Application Layer (TCP/IP Network Administration)
  • client security: HTTP Client Security (Building Internet Firewalls)
  • configuring: HTTP and HTTPS (Building Internet Firewalls)
  • • in screened subnet architecture: HTTP and HTTPS (Building Internet Firewalls)
  • discovering support for (SNMPc): Discovery and Filters (Essential SNMP)
  • MIME data subtype: Multipurpose Internet Mail Extensions (TCP/IP Network Administration)
  • monitoring devices with HTTP servers: Non-SNMP Approaches (Network Troubleshooting Tools)
  • network address translation in: Network Address Translation Characteristics of HTTP (Building Internet Firewalls)
  • ntop traffic results: Web mode (Network Troubleshooting Tools)
  • packet filtering in: Packet Filtering Characteristics of HTTP (Building Internet Firewalls)
  • performance and security problems: HTTP (Network Troubleshooting Tools)
  • ports: nmap (Network Troubleshooting Tools)
  • • Device Identification (Network Troubleshooting Tools)
  • proxying in: Proxying Characteristics of HTTP (Building Internet Firewalls)
  • • with TIS FWTK: Other TIS FWTK Proxies (Building Internet Firewalls)
  • secure HTTP: Web mode (Network Troubleshooting Tools)
  • server: Special HTTP Servers (Building Internet Firewalls)
  • • security of: The World Wide Web (Building Internet Firewalls)
  • stack fingerprinting ports and: queso (Network Troubleshooting Tools)
  • troubleshooting: HTTP (Network Troubleshooting Tools)
  • tunneling: HTTP Tunneling (Building Internet Firewalls)
  • using with databases: Using a custom protocol to connect to a perimeter web server (Building Internet Firewalls)
  • web-based NMSs and: Look Ahead (Essential SNMP)
• http_core.c (DSO module): Loading Dynamic Shared Objects (TCP/IP Network Administration)
• httpd processes, managing: Managing the Swarm (TCP/IP Network Administration)
• httpd.conf (Apache configuration file): Configuring the Apache Server (TCP/IP Network Administration)
• • Solaris httpd.conf File (TCP/IP Network Administration)
  • access controls
  • • document level controls: Setting document-level access controls (TCP/IP Network Administration)
    • file level controls: Setting file-level access controls (TCP/IP Network Administration)
    • overview: Defining Access Controls (TCP/IP Network Administration)
    • user authentication: Requiring user authentication (TCP/IP Network Administration)
  • configuration directives: Basic Configuration Directives (TCP/IP Network Administration)
  • directives
  • • configuration: Loading Dynamic Shared Objects (TCP/IP Network Administration)
    • MIME file types: Defining File Types (TCP/IP Network Administration)
  • dynamically loadable modules: Loading Dynamic Shared Objects (TCP/IP Network Administration)
  • location of: Configuring the Apache Server (TCP/IP Network Administration)
  • overview: Understanding an httpd.conf File (TCP/IP Network Administration)
  • server options, controlling: Controlling Server Options (TCP/IP Network Administration)
  • Solaris configuration: Configuring Apache on Solaris (TCP/IP Network Administration)
  • web server document locations: Defining Where Things Are Stored (TCP/IP Network Administration)
• HTTPS: Securing HTTP (Building Internet Firewalls)
• • configuring: HTTP and HTTPS (Building Internet Firewalls)
  • • in screened subnet architecture: HTTP and HTTPS (Building Internet Firewalls)
• hubs
• • compared to switches: Access to Traffic (Network Troubleshooting Tools)
  • Ethernet vs Fast Ethernet: Network partitioning hardware (Managing NFS and NIS)
  • networks: Network partitioning hardware (Managing NFS and NIS)
  • point-monitoring tools and: Point-Monitoring Tools (Network Troubleshooting Tools)
  • security and: Switch Security (Network Troubleshooting Tools)
  • traffic capture and: Access to Traffic (Network Troubleshooting Tools)
  • unmanaged hubs: Mapping or Diagramming (Network Troubleshooting Tools)
• human-readable object names (see OIDs)
• HUP command, using with snmpd: Agents and traps (Network Troubleshooting Tools)
• HUP signals: Net-SNMP (Essential SNMP)
• • Using Signals (DNS and Bind)
  • OpenView's Extensible Agent (Essential SNMP)
  • Using snmpusm to manage users (Essential SNMP)
• hybrid NMS architectures: NMS Architectures (Essential SNMP)
• hybrid proxying (see routers, proxy-aware)
• Hypertext Markup Language (HTML): The World Wide Web (Building Internet Firewalls)
• Hypertext Transfer Protocol (HTTP): The World Wide Web (Building Internet Firewalls)
• • Application Layer (TCP/IP Network Administration)
• HyperText Transport Protocol (see HTTP)
• hyphen (-) in host names: Host Name Checking (BIND 4.9.4 and Later Versions) (DNS and Bind)
• hypotheses in troubleshooting: Generic Troubleshooting (Network Troubleshooting Tools)

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