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# Index: E

Echo Message
  1.5.2. Internet Control Message Protocol
  7.2. The Minimal Routing Table
edit FYIs (For Your Information) : 13.7. Summary
edu domain : 3.3.1. The Domain Hierarchy
EGP (Exterior Gateway Protocol)
  2.4. Internet Routing Architecture
  7.5.1. Exterior Gateway Protocol
  11.9. Simple Network Management Protocol
  neighbors : 7.5.1. Exterior Gateway Protocol
  statement (in gated) : B.8.6. The egp Statement
EHLO command, in ESMTP
  3.4.3. Multipurpose Internet Mail Extensions
  10.8. Testing sendmail.cf
email (electronic mail)
  1.7. Application Layer
  (see also mail, servers; addresses)
  delivering : 1.7. Application Layer
  for file transfers : 3.4.3. Multipurpose Internet Mail Extensions
  growing importance of : 9.7.2. IMAP Server
  for RFCs : 13.4.1. Retrieving RFCs by mail
emergencies : (see disaster recovery plans)
encapsulation : 1.3. TCP/IP Protocol Architecture
  of datagrams : 1.4. Network Access Layer
  of mail messages : 3.4.3. Multipurpose Internet Mail Extensions
encoding
  data : 3.4.3. Multipurpose Internet Mail Extensions
  text
    3.4.3. Multipurpose Internet Mail Extensions
    12.6. Encryption
encryption
  4.2.1. Obtaining an IP Address
  6.3.4. PPP Daemon Security
  12.6. Encryption
  multipart subtype : 3.4.3. Multipurpose Internet Mail Extensions
  uses for : 12.6. Encryption
end systems : (see hosts)
end-to-end
  data encryption : 12.6. Encryption
  routes
    2.5. The Routing Table
    3.4.1. Simple Mail Transfer Protocol
    7.4.3. Open Shortest Path First
    7.5.2. Border Gateway Protocol
    B.10. Control Statements
enriched text subtype : 3.4.3. Multipurpose Internet Mail Extensions
enterprise
  networks : 4.1. Connected and Non-Connected Networks
  subnets : 5.2. Linux Kernel Configuration
enterpriseSpecific trap : 11.9. Simple Network Management Protocol
equal-cost multi-path routing : 7.4.3. Open Shortest Path First
equivalent hosts : 12.2.5. Secure the r Commands
error
  correction, not provided in SLIP : 6.2.1. The Serial Protocols
  detection
    1.5.1. Internet Protocol
    11.8. Protocol Case Study
    end-to-end : 1.6. Transport Layer
  human : 11.1.1. Troubleshooting Hints
  messages
    passing to user : 10.6.2. Transforming the Address
    in troubleshooting
      11.1.1. Troubleshooting Hints
      11.3. Testing Basic Connectivity
  recovery : 1.5.1. Internet Protocol
ESMTP (Extended SMTP)
  3.4.3. Multipurpose Internet Mail Extensions
  10.8. Testing sendmail.cf
  private extensions to : 3.4.3. Multipurpose Internet Mail Extensions
ESTABLISHED state : B.8.5. The bgp Statement
/etc directory
  /etc/aliases file
    3.4.1. Simple Mail Transfer Protocol
    9.3. Network Information Service
  /etc/aspppd.cf file : 6.3.6. Solaris PPP
  /etc/auto_direct file : 9.1.4. NFS Automounter
  /etc/auto_home file : 9.1.4. NFS Automounter
  /etc/auto_master file : 9.1.4. NFS Automounter
  /etc/bootptab file
    9.4. A BOOTP Server
    9.6.1. rdist
    configuration parameters : 9.4.2. BOOTP extensions
    updating : 9.4.2. BOOTP extensions
  /etc/default/passwd file : 12.2.1. The Shadow Password File
  /etc/defaultdomain file : 9.3. Network Information Service
  /etc/dfs/dfstab file
    9.1.2.1. The share command
    9.1.5.1. NFS print services
  /etc/dhcpd.conf file : 9.5.1. dhcpd.conf
  /etc/diphosts file : 6.4.3. SLIP Server Configuration
  /etc/ethers file
    3.5.1. Reverse Address Resolution Protocol
    9.3. Network Information Service
    11.4.2.1. ARP problem case study
  /etc/exports file : 9.1.5.1. NFS print services
  /etc/fstab file : 9.1.3.2. The vfstab and fstab files
  /etc/gated.conf file : 7.6. Gateway Routing Daemon
    creating : 7.7.2.1. Running gated at startup
  /etc/gateways file : 7.3.1.1. Installing static routes at startup
    reading at startup : 7.4.1.1. Running RIP with routed
  /etc/group file
    9.3. Network Information Service
    13.2.1. Creating an FTP Server
  /etc/hosts file
    3.2. The Host Table
    6.1. The ifconfig Command
    7.3. Building a Static Routing Table
    9.1.4. NFS Automounter
    9.3. Network Information Service
    creating : 3.2. The Host Table
    as maps : 3.3.5. Network Information Service
    modifying : 3.3.4. BIND, resolver, and named
  /etc/hosts.allow file : 12.5.1.1. tcpd access control files
  /etc/hosts.deny file : 12.5.1.1. tcpd access control files
  /etc/hosts.equiv file : 12.2.5. Secure the r Commands
    in security checks : 12.4.2. Looking for Trouble
  /etc/hosts.lpd file : 9.2.1.1. LPD security
    in security checks : 12.4.2. Looking for Trouble
  /etc/inetd.conf file : 9.4. A BOOTP Server
    editing in tcpd : 12.5.1. wrapper
    removing daemons from : 12.3.1. Remove Unnecessary Software
    in security checks : 12.4.2. Looking for Trouble
  /etc/init.d directory : 9.1.1. NFS Daemons
    autofs script : 9.1.4. NFS Automounter
    inetinit script : 7.3.1.1. Installing static routes at startup
    sendmail script : 10.2. Running sendmail as a Daemon
  /etc/lp directory : 9.2.2. Solaris Line Printer Service
  /etc/lp/Systems file : 9.2.2. Solaris Line Printer Service
  /etc/named.boot file
    11.6.3. Cache corruption
    C.1. The named Command
  /etc/named.ca file : 11.6.3. Cache corruption
  /etc/named.pid file : 11.6.3. Cache corruption
  /etc/networks file
    3.2. The Host Table
    6.1.3. Assigning a Subnet Mask
    7.3. Building a Static Routing Table
    9.3. Network Information Service
    as maps : 3.3.5. Network Information Service
  /etc/passwd file
    6.3.5. PPP Server Configuration
    6.4.3. SLIP Server Configuration
    9.1.5. NFS Authentication Server
    9.3. Network Information Service
    10.4.1.1. Building a sendmail.cf with m4 macros
    13.2.1. Creating an FTP Server
    protecting : 12.2. User Authentication
    in security checks : 12.4.2. Looking for Trouble
  /etc/pcnfsd.conf file : 9.1.5.1. NFS print services
  /etc/ppp directory, protecting : A.2. The PPP Daemon
  /etc/ppp/options file
    6.3.1. The PPP Daemon
    6.3.2. Dial-Up PPP
    A.2. The PPP Daemon
  /etc/ppp/options.device file : A.2. The PPP Daemon
  /etc/printcap file : 9.2.1. The printcap File
  /etc/protocols file
    2.7.1. Protocol Numbers
    5.4. The Internet Daemon
    9.3. Network Information Service
  /etc/rc.d/rc.inet1 script : 7.3.1.1. Installing static routes at startup
  /etc/rc.d/rc.M startup script : 10.2. Running sendmail as a Daemon
  /etc/resolv.conf file
    8.1.1. BIND Configurations
    8.2. Configuring the Resolver
    11.6.4. dig: An Alternative to nslookup
  /etc/services file
    5.4. The Internet Daemon
    9.3. Network Information Service
    9.4. A BOOTP Server
    9.7.1. POP Server
    9.7.2. IMAP Server
  /etc/shadow file : 12.2.1. The Shadow Password File
  /etc/ssh_known_hosts file : 12.2.6. Secure Shell
  /etc/system file : 5.1. Kernel Configuration
  /etc/yp.conf file : 9.3. Network Information Service
Ethernet
  1.5.1.3. Fragmenting datagrams
  4.2.2. Defining the Subnet Mask
  addresses : 1.4. Network Access Layer
    identifying DHCP client by : 9.5.1. dhcpd.conf
    keeping records of : 11.4.2. Troubleshooting with the arp Command
  cards, configuring
    5.2. Linux Kernel Configuration
    6.1.1. Determining the Interface Name
  fast ports (100 Mbps) : 11.4.4. Subdividing an Ethernet
  FreeBSD device drivers, listed : 5.3.1.3. Devices
  interfaces
    5.3.1.3. Devices
    6.1. The ifconfig Command
    6.1.5.2. ARP and trailers
    6.1.5.6. Putting ifconfig in the startup files
  LAN : 5.2. Linux Kernel Configuration
  networks : 1.4. Network Access Layer
  subdividing : 11.4.4. Subdividing an Ethernet
  support in BSD : 5.3.1.2. Pseudo-device
  switch : 11.4.4. Subdividing an Ethernet
ethers file
  3.5.1. Reverse Address Resolution Protocol
  9.3. Network Information Service
  11.4.2.1. ARP problem case study
executable files, in security checks : 12.4.2. Looking for Trouble
expect nothing ('')
  6.3.3. chat
  A.3. chat
expect scripting language : A.1.1.1. A sample dip script
expire fields : 12.2.1. The Shadow Password File
EXPN command
  in ESMTP : 3.4.3. Multipurpose Internet Mail Extensions
  in SMTP : 3.4.1. Simple Mail Transfer Protocol
export statement (in gated) : B.10.2. The export Statement
exports file : 9.1.5.1. NFS print services
Extended SMTP (ESMTP)
  3.4.3. Multipurpose Internet Mail Extensions
  10.8. Testing sendmail.cf
  private extensions to : 3.4.3. Multipurpose Internet Mail Extensions
extensibility
  in monitors : 11.9. Simple Network Management Protocol
  of SMTP : 3.4.3. Multipurpose Internet Mail Extensions
Exterior Gateway Protocol : (see EGP)
exterior routing protocols : 7.5. Exterior Routing Protocols
External-body message subtype : 3.4.3. Multipurpose Internet Mail Extensions

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