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Index: R

rain : (see water)

RAM theft : Practical UNIX & Internet Security, 12.2.6. Preventing Theft

rand function : Practical UNIX & Internet Security, 23.7.1. rand ( )

random device : Practical UNIX & Internet Security, 23.7.4. Other random number generators

random function : Practical UNIX & Internet Security, 23.7.2. random ( )

random numbers : Practical UNIX & Internet Security, 23.6. Tips on Generating Random Numbers

range parameter

TCP/IP Network Administration, 9.5.1. dhcpd.conf
TCP/IP Network Administration, D.3.2. Configuration Parameters

RARP (Reverse Address Resolution Protocol)

TCP/IP Network Administration, 3.5.1. Reverse Address Resolution Protocol
TCP/IP Network Administration, 5.2. Linux Kernel Configuration
adding to Linux kernel : TCP/IP Network Administration, 6.1.5.5. Point-to-point
/etc/ethers file in : TCP/IP Network Administration, 9.3. Network Information Service

raw devices : Practical UNIX & Internet Security, 5.6. Device Files

raw sockets : TCP/IP Network Administration, 5.4. The Internet Daemon

rc directory

Practical UNIX & Internet Security, 11.5.3.5. System initialization files
Practical UNIX & Internet Security, 17.1.2. Starting the Servers
Practical UNIX & Internet Security, C.5.1. Process #1: /etc/init
sendmail, 15.5. Prevent the Daemon from Running
commenting out services : Practical UNIX & Internet Security, 17.3. Primary UNIX Network Services
services started by : Building Internet Firewalls, 5.8.2.1. How are services managed?

rc.inet1 script : TCP/IP Network Administration, 7.3.1.1. Installing static routes at startup

rc.M startup script : TCP/IP Network Administration, 10.2. Running sendmail as a Daemon

RC2, RC4, and RC5 algorithms

Practical UNIX & Internet Security, 6.4.1. Summary of Private Key Systems
Practical UNIX & Internet Security, 6.4.8. Proprietary Encryption Systems

RC4 and RC5 algorithms : Practical UNIX & Internet Security, 6.4.1. Summary of Private Key Systems

rcp command

Building Internet Firewalls, 2.2. File Transfer
Practical UNIX & Internet Security, 1.4.3. Add-On Functionality Breeds Problems
Practical UNIX & Internet Security, 7.4.5. Backups Across the Net

RCPT command (SMTP)

sendmail, 23.9. The qf File Internals
sendmail, 29.10.2. The check_rcpt Rule Set
sendmail, 36.7. Alphabetized Reference

RCS (Revision Control System)

Practical UNIX & Internet Security, 7.3.2. Building an Automatic Backup System
Practical UNIX & Internet Security, 17.3. Primary UNIX Network Services
TCP/IP Network Administration, 10.4.1.1. Building a sendmail.cf with m4 macros

rdist command

Practical UNIX & Internet Security, 7.4.5. Backups Across the Net
Practical UNIX & Internet Security, 9.2.1.3. rdist
TCP/IP Network Administration, 9.6.1. rdist

rdump/rrestore program : Practical UNIX & Internet Security, 7.4.5. Backups Across the Net

reachability information

TCP/IP Network Administration, 2.4. Internet Routing Architecture
TCP/IP Network Administration, 7.5. Exterior Routing Protocols
TCP/IP Network Administration, 7.6. Gateway Routing Daemon

READ command, in POP : TCP/IP Network Administration, 3.4.2. Post Office Protocol

read permission

Practical UNIX & Internet Security, 5.1.7. File Permissions in Detail
Practical UNIX & Internet Security, 5.4. Using Directory Permissions
(see permissions)

read system call : Practical UNIX & Internet Security, 5.1.7. File Permissions in Detail

time-outs on : Practical UNIX & Internet Security, 23.3. Tips on Writing Network Programs

READ= command : Practical UNIX & Internet Security, 15.5.2. Permissions Commands

READ_ME file : sendmail, 2.2. Read the Documents

read-only filesystems

Practical UNIX & Internet Security, 11.6.1.2. Writable system files and directories
Building Internet Firewalls, 5.8.4.3. Mount filesystems as read-only
Practical UNIX & Internet Security, 9.1.2. Read-only Filesystems

readdir library call : Practical UNIX & Internet Security, 5.4. Using Directory Permissions

real UIDs/GIDs

Practical UNIX & Internet Security, 4.3.1. Real and Effective UIDs
Practical UNIX & Internet Security, C.1.3.2. Process real and effective UID

real-time conferencing : (see conferencing services, real-time)

RealHostAddr variable : sendmail, 20.1.2. Global Variables

RealHostName variable : sendmail, 20.1.2. Global Variables

realpath function : Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs

reauthentication

Kerberos : Practical UNIX & Internet Security, 19.6.4. Using Kerberos
Secure RPC : Practical UNIX & Internet Security, 19.3.1.3. Setting the window

rebooting : Building Internet Firewalls, 5.10.1. Watch Reboots Carefully

rebuild aliases mode : sendmail, 4.1.3. Rebuild Aliases Mode (-bi)

rebuilding : (see building)

Receive Data (RD) : Practical UNIX & Internet Security, 14.3. The RS-232 Serial Protocol

"Received:" header line

sendmail, 1.5. The Header
sendmail, 13.4. Sending Mail
sendmail, 14.1.2. The Received: Header
sendmail, 20.2.5. Prune Received: Headers at Firewall
sendmail, 35.10. Alphabetized Reference
forged mail and : sendmail, 22.7.2. Forging with SMTP

recipient list buffer size : sendmail, 18.8. Alphabetized Reference

RecipientFactor (y) option : sendmail, 34.8. Alphabetized Reference

recipients

sendmail, 6.3. The local Delivery Agent

(see also R= equate; $u macro)

adding domain to address : sendmail, 30.8. Alphabetized F= Flags

addresses of

sendmail, 6.3. The local Delivery Agent
sendmail, 23.9. The qf File Internals
sendmail, 29.10.4. The check_compat Rule Set
sendmail, 31.10. Alphabetized Reference
TCP/IP Network Administration, 10.6.3. The Set Ruleset Command
(see also addresses)

check_rcpt rule set : sendmail, 29.10.2. The check_rcpt Rule Set

delivery agent as : sendmail, 30.8. Alphabetized F= Flags

filtering with shell script : sendmail, 24.6.2. Filtering Recipients with a Shell Script

getting from header : sendmail, 36.7. Alphabetized Reference

headers for : sendmail, 35.6.3. Recipient Headers

home directory of : sendmail, 31.10. Alphabetized Reference

large lists of : sendmail, 34.8. Alphabetized Reference

logging

sendmail, 26.1.3.6. nrcpts= the number of recipients
sendmail, 26.1.3.12. to= show final recipient

missing

sendmail, 34.8. Alphabetized Reference
sendmail, 35.10. Alphabetized Reference

multiple : sendmail, 30.8. Alphabetized F= Flags

processing list of

sendmail, 36.3. List of Recipient Addresses
sendmail, 36.4.5. Fifth: Collect Recipients

selecting MTA for : (see rule set 0)

username of : (see $u macro)

whitespace in lists of : sendmail, 34.8. Alphabetized Reference

recnews program : sendmail, 25.5.2. Gateway Lists to News

recording activity : (see logs/logging)

recovering after incident : Building Internet Firewalls, 13.1.6. Restore and Recover

plan for : Building Internet Firewalls, 13.4.6. Planning for Restoration and Recovery

recursion : sendmail, 21.3.3. MX Records Are Nonrecursive

recursive macro expansion : sendmail, 31.5.1. Macro Expansion Is Recursive

recursive searches : TCP/IP Network Administration, 3.3.2. Creating Domains and Subdomains

redirect feature : sendmail, 19.6. Alphabetized m4 Macros

Redirect Message

TCP/IP Network Administration, 1.5.2. Internet Control Message Protocol
TCP/IP Network Administration, 2.5. The Routing Table
TCP/IP Network Administration, 7.3.1. Adding Static Routes

redirect statement (in gated) : TCP/IP Network Administration, B.8.8. The redirect Statement

redirecting messages : (see aliases/aliasing)

redirecting routes : TCP/IP Network Administration, 1.5.2. Internet Control Message Protocol

Redman, Brian E. : Practical UNIX & Internet Security, 15.2. Versions of UUCP

refer_log file : Practical UNIX & Internet Security, 18.4.2. Eavesdropping Through Log Files

"Reference:" header line : sendmail, 35.10. Alphabetized Reference

reflectors (in Enigma system) : Practical UNIX & Internet Security, 6.3. The Enigma Encryption System

reformatting attack : Practical UNIX & Internet Security, 25.1. Destructive Attacks

refresh values : TCP/IP Network Administration, C.3.1.1. Start of Authority record

RefuseLA (X) option : sendmail, 34.8. Alphabetized Reference

registered hosts : TCP/IP Network Administration, 3.2. The Host Table

registration fee : TCP/IP Network Administration, 4.4.1. Obtaining a Domain Name

reject route

TCP/IP Network Administration, B.9. static Statements
TCP/IP Network Administration, B.10.1. The import Statement

rejecting mail messages

sendmail, 18.8. Alphabetized Reference
sendmail, 20.2.6. Reject Mail from Spamming or Mail-bombing Sites

relative humidity : Practical UNIX & Internet Security, 12.2.1.11. Humidity

relative pathnames : Practical UNIX & Internet Security, 5.1.3. Current Directory and Paths

relay= equate (syslog output) : sendmail, 26.1.3.9. relay= the host that sent or accepted the message

relays : sendmail, 19.4.5. Relays

smart hosts : sendmail, 19.6. Alphabetized m4 Macros

RELEASE_NOTES file : sendmail, 2.2. Read the Documents

reliability : TCP/IP Network Administration, 1.6.2. Transmission Control Protocol

remembering passwords : TCP/IP Network Administration, 12.2.2. Choosing a Password

remote

command execution

Building Internet Firewalls, 8.4. Remote Command Execution
Practical UNIX & Internet Security, 15.1.2. uux Command
Practical UNIX & Internet Security, 15.4.3. L.cmds: Providing Remote Command Execution
Practical UNIX & Internet Security, 17.3.17. rexec (TCP Port 512)

comparison copies : Practical UNIX & Internet Security, 9.2.1.2. Remote copies

computers

hijacking : Building Internet Firewalls, 10.1.1. Hijacking
transferring files to : Practical UNIX & Internet Security, 15.1.1. uucp Command

file access (UUCP)

Practical UNIX & Internet Security, 15.4.1. USERFILE: Providing Remote File Access
Practical UNIX & Internet Security, 15.4.2.1. Some bad examples

hosts

sendmail, 21.2.2. Look Up a Remote Host's Name
TCP/IP Network Administration, 1.5.2. Internet Control Message Protocol

network filesystems : Practical UNIX & Internet Security, 5.5.5. Turning Off SUID and SGID in Mounted Filesystems

procedure calls : (see RPCs)

servers : TCP/IP Network Administration, 6.3.2. Dial-Up PPP

accessing files on : TCP/IP Network Administration, 9.1. The Network File System

contacting administrators of

TCP/IP Network Administration, 11.1.1. Troubleshooting Hints
TCP/IP Network Administration, 11.3. Testing Basic Connectivity

never extending trust to : TCP/IP Network Administration, 12.2.3. One-Time Passwords

problem for firewalls : TCP/IP Network Administration, 12.7.1. Functions of the firewall

terminal access

Building Internet Firewalls, 2.3. Remote Terminal Access and Command
(see also Telnet service)

remote copy (rcp) command : TCP/IP Network Administration, 9.6. Managing Distributed Servers

remote file

Practical UNIX & Internet Security, 10.3.1. aculog File
Practical UNIX & Internet Security, 14.5.1. Hooking Up a Modem to Your Computer

Remote File System (RFS) : TCP/IP Network Administration, 3.7.1. File Sharing

Remote Procedure Calls : (see RPCs)

remote.unknown file : Practical UNIX & Internet Security, 15.5. Security in BNU UUCP

remounting filesystems after system reboot : TCP/IP Network Administration, 9.1.3.2. The vfstab and fstab files

renice command

Practical UNIX & Internet Security, 25.2.1.2. System overload attacks
Practical UNIX & Internet Security, C.1.3.3. Process priority and niceness

replacement character for space : sendmail, 13.2.8. The Unquoted Space Replacement Character

replay attacks

Practical UNIX & Internet Security, 17.3.14. Network Time Protocol (NTP) (UDP Port 123)
Practical UNIX & Internet Security, 19.6.1.2. Using the ticket granting ticket

reply feature : sendmail, 10.1. Why Preprocess?

"Reply-To:" header line

sendmail, 25.5.1. Reply Versus Bounce
sendmail, 35.10. Alphabetized Reference

REPORT keyword : TCP/IP Network Administration, A.3. chat

reportfile : TCP/IP Network Administration, A.3. chat

reporting security holes : Practical UNIX & Internet Security, 2.5.1. Going Public

reputation : Building Internet Firewalls, 1.1.3. Your Reputation

Request to Send (RTS) : Practical UNIX & Internet Security, 14.3. The RS-232 Serial Protocol

REQUEST= command

Practical UNIX & Internet Security, 15.5.1.3. A Sample Permissions file
Practical UNIX & Internet Security, 15.5.2. Permissions Commands

Requests for Comments : (see RFCs)

RES_DNSRCH : sendmail, 21.2.4. The $[ and $] Operators

res_search()

sendmail, 18.8. Alphabetized Reference
sendmail, 21.2.3. Look Up Addresses for Delivery

"Recent-" header lines : sendmail, 35.7. Forwarding with Resent-Headers

reserved memory space : Practical UNIX & Internet Security, 25.2.2.6. Reserved space

reserved TCP port : sendmail, 30.8. Alphabetized F= Flags

reset command : TCP/IP Network Administration, 6.3.2. Dial-Up PPP

resolution, time : Practical UNIX & Internet Security, 23.8. Picking a Random Seed

resolv.conf file

TCP/IP Network Administration, 8.1.1. BIND Configurations
TCP/IP Network Administration, 8.2. Configuring the Resolver
TCP/IP Network Administration, 8.2.1. The Resolver Configuration File
TCP/IP Network Administration, 11.6.4. dig: An Alternative to nslookup

resolver

code : TCP/IP Network Administration, 3.3.4. BIND, resolver, and named
configuring : TCP/IP Network Administration, 8.2. Configuring the Resolver
defined : TCP/IP Network Administration, 8.1. BIND: UNIX Name Service
DNS : Practical UNIX & Internet Security, 17.3.6. Domain Name System (DNS) (TCP and UDP Port 53)
options : TCP/IP Network Administration, E.4.2. sendmail Options

resolver library

Practical UNIX & Internet Security, 16.2.6.1. DNS under UNIX
sendmail, 18.5.1. Use libresolv.a

resolver-only configurations

TCP/IP Network Administration, 3.3.4. BIND, resolver, and named
TCP/IP Network Administration, 8.1.1. BIND Configurations
TCP/IP Network Administration, 8.2.1.1. A resolver-only configuration

ResolverOptions (I) option

sendmail, 21.2.4. The $[ and $] Operators
sendmail, 34.8. Alphabetized Reference

resource unavailable error : sendmail, 36.5.9. EX_UNAVAILABLE A Resource

resources (memory) : Building Internet Firewalls, 1.1.2. Your Resources

resources on sendmail

sendmail, Additional Sources of Information
sendmail, 2.2. Read the Documents

response teams

Practical UNIX & Internet Security, 27.3.5. Response Personnel?
Practical UNIX & Internet Security, F.3. Emergency Response Organizations
Practical UNIX & Internet Security, F.3.4.46. Westinghouse Electric
(see incident response teams)
mailing lists for : Practical UNIX & Internet Security, E.1.1. Response Teams and Vendors

responsibilities of administrators

TCP/IP Network Administration, 1.7. Application Layer
TCP/IP Network Administration, 4. Getting Started
TCP/IP Network Administration, 4.3. Planning Routing
TCP/IP Network Administration, 4.6. Informing the Users
TCP/IP Network Administration, 5.1. Kernel Configuration

restart signal : sendmail, 26.3.2. SIGHUP Restart

restarting sendmail daemon : sendmail, 4.1.1.1. Kill and restart, beginning with V8.7

restore program : (see dump/restore program)

restricted

filesystems

Practical UNIX & Internet Security, 8.1.5. Restricted Filesystem
Practical UNIX & Internet Security, 8.1.5.2. Checking new software

FTP : Practical UNIX & Internet Security, 17.3.2.5. Restricting FTP with the standard UNIX FTP server

logins : Practical UNIX & Internet Security, 8.3. Restricting Logins

shells

Practical UNIX & Internet Security, 8.1.4.1. Restricted shells under System V UNIX
Practical UNIX & Internet Security, 8.1.4.6. Potential problems with rsh

su use : Practical UNIX & Internet Security, 4.3.6. Restricting su

restrictmailq (sendmail) : Practical UNIX & Internet Security, 17.3.4.3. Improving the security of Berkeley sendmail V8

retention of backups

Practical UNIX & Internet Security, 7.1.5. How Long Should You Keep a Backup?
Practical UNIX & Internet Security, 7.2.2.2. Retention schedule
(see also networks and networking, backing up)

retina authentication : Building Internet Firewalls, 10.2.1. Something You Are

retired accounts : sendmail, 19.6. Alphabetized m4 Macros

RETR command, in POP : TCP/IP Network Administration, 3.4.2. Post Office Protocol

retry time : sendmail, 34.8. Alphabetized Reference

RetryFactor (Z) option

sendmail, 23.9. The qf File Internals
sendmail, 34.8. Alphabetized Reference

return calls : Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs

return interval : sendmail, 13.2.2. Limit the Life of Queued Messages

"Return-Path:" header line

sendmail, 30.8. Alphabetized F= Flags
sendmail, 35.10. Alphabetized Reference

"Return-Receipt-To:" header line

sendmail, 18.8. Alphabetized Reference
sendmail, 35.10. Alphabetized Reference

Reverse Address Resolution Protocol : (see RARP)

reverse domain : TCP/IP Network Administration, 4.4.1.1. Obtaining an IN-ADDR.ARPA domain

files

TCP/IP Network Administration, 8.3.5. The Reverse Domain File
TCP/IP Network Administration, C.3.1.6. Domain Name Pointer record

reverse lookups

Building Internet Firewalls, 8.10.4.2. Mismatched data between the hostname
Building Internet Firewalls, 8.10.5.1. Set up a `fake'
Practical UNIX & Internet Security, 16.3.2. Security and Nameservice
Practical UNIX & Internet Security, 23.3. Tips on Writing Network Programs

reviewing security policies : Building Internet Firewalls, 11.1.1.5. Provision for reviews

Revision Control System (RCS)

Practical UNIX & Internet Security, 7.3.2. Building an Automatic Backup System
Practical UNIX & Internet Security, 17.3. Primary UNIX Network Services

revocation certificate : Practical UNIX & Internet Security, 6.6.3.2. Creating your PGP public key

"rewrite" prompt : (see address-testing mode)

rewrite rules

processing sequentially : TCP/IP Network Administration, 10.6.2. Transforming the Address
recursion built-in : TCP/IP Network Administration, 10.6.2. Transforming the Address
syntax of : TCP/IP Network Administration, 10.6.2. Transforming the Address
using external databases in : TCP/IP Network Administration, 10.6.2.1. Transforming with a database

rewriting

addresses

sendmail, 8.3. Rule Sets
sendmail, 11.4.1. Rewrite the Lone Username

rule sets

(see R= equate)
(see S= equate)

User Database : sendmail, 30.8. Alphabetized F= Flags

rex service : Building Internet Firewalls, 8.4.3. rex

rexd service : Practical UNIX & Internet Security, 19.2.2.4. AUTH_KERB

rexec service

Building Internet Firewalls, 8.4.2. rexec
Practical UNIX & Internet Security, 17.3.17. rexec (TCP Port 512)

RFCs (Requests for Comments)

sendmail, The RFCs

TCP/IP Network Administration, 1.1.2. Protocol Standards

TCP/IP Network Administration, 1.4. Network Access Layer

TCP/IP Network Administration, 2.3. Subnets

authorative source : TCP/IP Network Administration, 11.8. Protocol Case Study

keeping up with latest : TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions

retrieving : TCP/IP Network Administration, 13.4. Retrieving RFCs

rfc-index.txt : TCP/IP Network Administration, 13.4. Retrieving RFCs

RFC819 : sendmail, The RFCs

RFC821

sendmail, The RFCs
sendmail, 30.8. Alphabetized F= Flags

RFC822

sendmail, The RFCs
sendmail, 14.1. Headers
sendmail, 28.1.2. Rules Are Treated Like Addresses
sendmail, 32.5. Alphabetized Reference
sendmail, 35.2. Header Names
sendmail, 35.6.6. Other RFC822 Headers
TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions

RFC974 : sendmail, 21.3.7. Ambiguous MX Records

RFC976 : sendmail, The RFCs

RFC1123

sendmail, The RFCs
sendmail, 14.1. Headers

RFC1413 : sendmail, 31.10. Alphabetized Reference

RFC1521 and RFC1522 : sendmail, The RFCs

RFC1597 and RFC1627 : Building Internet Firewalls, 4.5. What the Future Holds

RFC1651 to RFC1653 : sendmail, The RFCs

RFC1750 : Practical UNIX & Internet Security, 23.8. Picking a Random Seed

RFC1891 to RFC1894 : sendmail, The RFCs

RFS (Remote File System) : TCP/IP Network Administration, 3.7.1. File Sharing

.rhosts file

Building Internet Firewalls, 8.4.1. BSD
Practical UNIX & Internet Security, 10.4.3. Network Setup
Practical UNIX & Internet Security, 17.3.18.4. The ~/.rhosts file
Practical UNIX & Internet Security, 17.3.18.5. Searching for .rhosts files
TCP/IP Network Administration, 12.2.5. Secure the r Commands
back door in : Practical UNIX & Internet Security, 11.1.2. Back Doors and Trap Doors
intruder's changes to : Practical UNIX & Internet Security, 24.4.1.4. Changes in .rhosts files
searching for : Practical UNIX & Internet Security, 17.3.18.5. Searching for .rhosts files
in security checks : TCP/IP Network Administration, 12.4.2. Looking for Trouble

RHS, rule

sendmail, 8.4. Rules
sendmail, 28.6. The RHS
(see also rule sets)
class macros in : sendmail, 12.1.4. Class Macros in the RHS
RHS triple : sendmail, 9.2. The RHS Triple

richtext text subtype : TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions

Ring Indicator (RI) : Practical UNIX & Internet Security, 14.3. The RS-232 Serial Protocol

RIP (Routing Information Protocol)

Practical UNIX & Internet Security, 17.3.19. Routing Internet Protocol (RIP routed) (UDP Port

TCP/IP Network Administration, 2.2.2. Classless IP Addresses

TCP/IP Network Administration, 6.1.5.3. Metric

TCP/IP Network Administration, 7.4.1. Routing Information Protocol

checking updates : TCP/IP Network Administration, 11.5.1. Checking RIP Updates

configuring : Building Internet Firewalls, 8.12.2. Routing Information Protocol

enabling (in gated) : TCP/IP Network Administration, 7.7.1.1. A host configuration

running : TCP/IP Network Administration, 7.4.1.1. Running RIP with routed

starting : TCP/IP Network Administration, 5.4. The Internet Daemon

statement (in gated) : TCP/IP Network Administration, B.8.2. The rip Statement

Version 2 (RIP-2)

TCP/IP Network Administration, 7.4.2. RIP Version 2
TCP/IP Network Administration, 7.7.1.1. A host configuration

RIP REQUEST command : TCP/IP Network Administration, 11.5.1. Checking RIP Updates

RIPE Network Control Center : TCP/IP Network Administration, 2.4. Internet Routing Architecture

RIPE-181 standard : TCP/IP Network Administration, 2.4. Internet Routing Architecture

ripquery

TCP/IP Network Administration, 11.2. Diagnostic Tools
TCP/IP Network Administration, 11.5.1. Checking RIP Updates

Riseaux IP Europeens (RIPE) Network Control Center (NCC) : TCP/IP Network Administration, 2.4. Internet Routing Architecture

risk assessment

Practical UNIX & Internet Security, 2.2. Risk Assessment
Practical UNIX & Internet Security, 2.2.2. Review Your Risks
Practical UNIX & Internet Security, 2.5.3. Final Words: Risk Management Means Common Sense

risks forum : TCP/IP Network Administration, 12.1.2.2. Use mailing lists to distribute information

RISKS mailing list : Building Internet Firewalls, A.3.6. RISKS

Ritchie, Dennis : Practical UNIX & Internet Security, 1.3. History of UNIX

Rivest, Ronald L.

Practical UNIX & Internet Security, 6.1.3. Modern Controversy
Practical UNIX & Internet Security, 6.4.1. Summary of Private Key Systems
Practical UNIX & Internet Security, 6.4.2. Summary of Public Key Systems
Practical UNIX & Internet Security, 6.4.6. RSA and Public Key Cryptography
Practical UNIX & Internet Security, 6.5.4.1. MD2, MD4, and MD5

RJE (Remote Job Entry) : Practical UNIX & Internet Security, 3.2.1. The /etc/passwd File

rlogin command/service

Building Internet Firewalls, 2.3. Remote Terminal Access and Command
Practical UNIX & Internet Security, 1.4.3. Add-On Functionality Breeds Problems
Practical UNIX & Internet Security, 3.5. Verifying Your New Password
Practical UNIX & Internet Security, 16.3.2. Security and Nameservice
Practical UNIX & Internet Security, 17.3.18. rlogin and rsh (TCP Ports 513 and 514)
Practical UNIX & Internet Security, 17.3.18.6. /etc/hosts.lpd file
TCP/IP Network Administration, 4.1. Connected and Non-Connected Networks
TCP/IP Network Administration, 5.3.1.2. Pseudo-device
TCP/IP Network Administration, 12.2.3. One-Time Passwords
TCP/IP Network Administration, 2.7.2. Port Numbers
proxying with TIS FWTK : Building Internet Firewalls, 7.7.2. Telnet and rlogin Proxying with
versus Telnet : Practical UNIX & Internet Security, 17.3.18. rlogin and rsh (TCP Ports 513 and 514)

rm command

Practical UNIX & Internet Security, 5.4. Using Directory Permissions
Practical UNIX & Internet Security, 15.4.3. L.cmds: Providing Remote Command Execution
deep tree structures and : Practical UNIX & Internet Security, 25.2.2.8. Tree-structure attacks

rmail program : Practical UNIX & Internet Security, 15.4.3. L.cmds: Providing Remote Command Execution

ro option (read-only access)

for Linux systems : TCP/IP Network Administration, 9.1.2.2. The /etc/exports file
for Solaris systems : TCP/IP Network Administration, 9.1.2.1. The share command

root account/user

Practical UNIX & Internet Security, 4. Users, Groups, and the Superuser

Practical UNIX & Internet Security, 4.1. Users and Groups

Practical UNIX & Internet Security, 4.2.1. The Superuser

Practical UNIX & Internet Security, 4.2.1.5. The problem with the superuser

Practical UNIX & Internet Security, 5.5.2. Problems with SUID

Practical UNIX & Internet Security, 17.4. Security Implications of Network Services

sendmail, Other Books, Other Problems

sendmail, 14.6. Trusted User

sendmail, 22.1. Why root?

TCP/IP Network Administration, 5.4. The Internet Daemon

(see also superusers)

abilities of : Practical UNIX & Internet Security, 27.1.3. What the Superuser Can and Cannot Do

chroot command

Building Internet Firewalls, 8.2.1.3. Providing anonymous
Practical UNIX & Internet Security, 8.1.5. Restricted Filesystem
Practical UNIX & Internet Security, 8.1.5.2. Checking new software
Practical UNIX & Internet Security, 11.1.4. Trojan Horses
Practical UNIX & Internet Security, 23.4.1. Using chroot()
with anonymous FTP : Practical UNIX & Internet Security, 17.3.2.6. Setting up anonymous FTP with the standard UNIX FTP

immutable files and : Practical UNIX & Internet Security, 9.1.1. Immutable and Append-Only Files

network services with : Practical UNIX & Internet Security, 17.4. Security Implications of Network Services

options that don't run on : sendmail, 34.1.4. Options that Are Safe

protecting

Practical UNIX & Internet Security, 8.5. Protecting the root Account
Practical UNIX & Internet Security, 8.5.3.2. Trusted computing base

on remote machine, fingering : Practical UNIX & Internet Security, 24.2.4.2. How to contact the system administrator of a computer

single-command accounts and : Practical UNIX & Internet Security, 8.1.3. Accounts That Run a Single Command

SUID_ROOT_FILES_OK macro : sendmail, 18.8. Alphabetized Reference

web server as : Practical UNIX & Internet Security, 18.2.1. The Server's UID

root directory : Practical UNIX & Internet Security, 5.1.1. Directories

backups of : Practical UNIX & Internet Security, 7.1.3. Types of Backups
UUCP access from : Practical UNIX & Internet Security, 15.4.2.1. Some bad examples

root domain : TCP/IP Network Administration, 3.3.1. The Domain Hierarchy

root server : TCP/IP Network Administration, 3.3.1. The Domain Hierarchy

configuring : TCP/IP Network Administration, 8.3.1. The named.boot File
entries, corrupted : TCP/IP Network Administration, 11.6.3. Cache corruption

root option for /etc/exports : Practical UNIX & Internet Security, 20.2.1.1. /etc/exports

root=host option (root access for specified host) : TCP/IP Network Administration, 9.1.2.1. The share command

ROT13 algorithm

Practical UNIX & Internet Security, 6.4.1. Summary of Private Key Systems
Practical UNIX & Internet Security, 6.4.3. ROT13: Great for Encoding Offensive Jokes

rotating backup media

Practical UNIX & Internet Security, 7.1.3. Types of Backups
Practical UNIX & Internet Security, 7.2.1.2. Media rotation

route command

TCP/IP Network Administration, 6.1.5.3. Metric
TCP/IP Network Administration, 6.4.1. slattach
TCP/IP Network Administration, 7.3. Building a Static Routing Table
TCP/IP Network Administration, 7.3.1.1. Installing static routes at startup
route add command : TCP/IP Network Administration, 11.5. Checking Routing

routes

addressing

sendmail, 17.1.5. The % Hack
sendmail, 21.5.1. Offsite MX Hosts
sendmail, 29.4.3. Handling Routing Addresses
d flag and : sendmail, 30.8. Alphabetized F= Flags
pruning : sendmail, 34.8. Alphabetized Reference

dampening : TCP/IP Network Administration, B.8.5. The bgp Statement

duplicate, silently ignored : TCP/IP Network Administration, B.8.5. The bgp Statement

filters : TCP/IP Network Administration, 7.7.1.3. Exterior gateway configuration

server entry, bogus : TCP/IP Network Administration, 8.3.3. The Cache Initialization File

routed daemon

Building Internet Firewalls, 5.8.2.4. Which services should you disable?
Practical UNIX & Internet Security, 17.3.19. Routing Internet Protocol (RIP routed) (UDP Port
TCP/IP Network Administration, 5.4. The Internet Daemon
TCP/IP Network Administration, 7.4.1. Routing Information Protocol

routerdiscovery statement (in gated) : TCP/IP Network Administration, B.8.10. The routerdiscovery Statement

routerid

TCP/IP Network Administration, 7.7.1.2. Interior gateway configurations
TCP/IP Network Administration, B.7. Definition Statements

routers and routing

Building Internet Firewalls, 6. Packet Filtering

Practical UNIX & Internet Security, 16.2.2. Routing

TCP/IP Network Administration, 1.7. Application Layer

TCP/IP Network Administration, 2.1. Addressing, Routing, and Multiplexing

areas, hierarchy of : TCP/IP Network Administration, 7.4.3. Open Shortest Path First

as choke point : Building Internet Firewalls, 6.1. Why Packet Filtering?

choosing : Building Internet Firewalls, 6.8. Choosing a Packet Filtering

commonest configurations : TCP/IP Network Administration, 7.1. Common Routing Configurations

consolidated : TCP/IP Network Administration, 2.2.2. Classless IP Addresses

datagrams : (see datagrams)

defined : TCP/IP Network Administration, 7. Configuring Routing

disabling : Building Internet Firewalls, 5.8.2.5. Turning off routing

domains

Building Internet Firewalls, C.10. Internet Routing Architecture
TCP/IP Network Administration, 2.4. Internet Routing Architecture

end-to-end : (see end-to-end)

exterior (or access) : (see exterior routers)

handling packets : Building Internet Firewalls, 6.4. What Does the Router Do with

intelligent : Practical UNIX & Internet Security, 21.2.3. Setting Up the Choke

information, exchanging : TCP/IP Network Administration, 1.7. Application Layer

interior

Building Internet Firewalls, 4.2.3.3. Interior router
TCP/IP Network Administration, 12.7. Firewalls
configuring : Building Internet Firewalls, 9.1.2.1. Interior Router
merging with bastion host : Building Internet Firewalls, 4.3.4. It's Dangerous to Merge the Bastion
merging with exterior router : Building Internet Firewalls, 4.3.2. It's OK to Merge the Interior Router and the Exterior Router
multiple : Building Internet Firewalls, 4.3.5. It's Dangerous to Use Multiple

interoperability with routers : TCP/IP Network Administration, B.8.5. The bgp Statement

logging actions of : Building Internet Firewalls, 6.4.1. Logging Actions

merging interior and exterior : Building Internet Firewalls, 4.3.2. It's OK to Merge the Interior Router and the Exterior Router

metric

TCP/IP Network Administration, 6.1.5.3. Metric
TCP/IP Network Administration, 7.3. Building a Static Routing Table

multicast

Building Internet Firewalls, 6.3.3.5. IP over IP
Building Internet Firewalls, 8.9.3. The Multicast Backbone (MBONE)

multi-path : TCP/IP Network Administration, 7.4.3. Open Shortest Path First

planning : TCP/IP Network Administration, 4.3. Planning Routing

policy

TCP/IP Network Administration, 7.6. Gateway Routing Daemon
TCP/IP Network Administration, B.10. Control Statements

protocols

TCP/IP Network Administration, 4. Getting Started
TCP/IP Network Administration, 4.2.2. Defining the Subnet Mask
(see also RIP)
choosing : TCP/IP Network Administration, 7.5.3. Choosing a Routing Protocol
defined : TCP/IP Network Administration, 7.1. Common Routing Configurations
interior : TCP/IP Network Administration, 7.4. Interior Routing Protocols
using gated for : TCP/IP Network Administration, 7.7.1.3. Exterior gateway configuration

responsibilities of : TCP/IP Network Administration, 7.1. Common Routing Configurations

returning ICMP error codes : Building Internet Firewalls, 6.4.2. Returning ICMP

screening : (see screening routers)

single-purpose versus general-purpose : Building Internet Firewalls, 6.8.2. It Can Be a Single-Purpose Router or

source : Building Internet Firewalls, 5.8.2.5. Turning off routing

tables

Building Internet Firewalls, C.11. The Routing Table
TCP/IP Network Administration, 2.5. The Routing Table
TCP/IP Network Administration, 7.1. Common Routing Configurations
building manually : TCP/IP Network Administration, 7.1. Common Routing Configurations
checking : TCP/IP Network Administration, 11.5. Checking Routing
minimal : TCP/IP Network Administration, 7.2. The Minimal Routing Table
unstable : TCP/IP Network Administration, B.8.5. The bgp Statement
viewing contents of : TCP/IP Network Administration, 6.4.4. Troubleshooting Serial Connections

testing : Building Internet Firewalls, 4.4.1. Laboratory Networks

troubleshooting : TCP/IP Network Administration, 11.5. Checking Routing

where to filter : Building Internet Firewalls, 6.8.8. It Should Have Good Testing and

Routing Arbiters

TCP/IP Network Administration, 2.4. Internet Routing Architecture
TCP/IP Network Administration, 7.5.2. Border Gateway Protocol

Routing Information Protocol : (see RIP)

RPC table (NIS+) : Practical UNIX & Internet Security, 19.5.3. NIS+ Tables

rpc.rexdserver : Practical UNIX & Internet Security, 17.3.22. RPC rpc.rexd (TCP Port 512)

rpcbind : (see portmapper)

RPCs (remote procedure calls)

Building Internet Firewalls, 5.8.2.4. Which services should you disable?

Building Internet Firewalls, 6.3.3.4. RPC

Practical UNIX & Internet Security, 17.3.22. RPC rpc.rexd (TCP Port 512)

Practical UNIX & Internet Security, 19. RPC, NIS, NIS+, and Kerberos

Practical UNIX & Internet Security, 19.7.2. SESAME

TCP/IP Network Administration, 2.7.2. Port Numbers

(see also NFS; NIS)

authentication of

Practical UNIX & Internet Security, 19.2.2. RPC Authentication
Practical UNIX & Internet Security, 19.2.2.4. AUTH_KERB

portmapper program : Practical UNIX & Internet Security, 17.3.11. Sun RPC's portmapper (UDP and TCP Ports 111)

Secure : (see Secure RPC)

spoofing : Practical UNIX & Internet Security, 19.4.4.4. Spoofing RPC

RRs (standard resource records) : TCP/IP Network Administration, 8.3.2. Standard Resource Records

in named : TCP/IP Network Administration, C.3.1. Standard Resource Records

RS-232 serial protocol : Practical UNIX & Internet Security, 14.3. The RS-232 Serial Protocol

rs.internic.net : TCP/IP Network Administration, 13.6. The White Pages

RS232C : TCP/IP Network Administration, 1.2. A Data Communications Model

RSA algorithm

Practical UNIX & Internet Security, 6.4.2. Summary of Public Key Systems
Practical UNIX & Internet Security, 6.4.6. RSA and Public Key Cryptography
Practical UNIX & Internet Security, 6.4.6.3. Strength of RSA
Practical UNIX & Internet Security, 6.5.3. Digital Signatures

rsh (restricted shell)

Building Internet Firewalls, 2.3. Remote Terminal Access and Command
Practical UNIX & Internet Security, 8.1.4.1. Restricted shells under System V UNIX
Practical UNIX & Internet Security, 8.1.4.6. Potential problems with rsh
Practical UNIX & Internet Security, 16.3.2. Security and Nameservice
Practical UNIX & Internet Security, 17.3.18. rlogin and rsh (TCP Ports 513 and 514)
Practical UNIX & Internet Security, 17.3.18.6. /etc/hosts.lpd file

rshd program : Practical UNIX & Internet Security, 11.1.2. Back Doors and Trap Doors

RUIDs : (see real UIDs/GIDs)

rule sets

sendmail, 5.3.4. Rule Sets

sendmail, 6.3.1. Skipping Rule Sets

sendmail, 8.3. Rule Sets

sendmail, 29. Rule Sets

TCP/IP Network Administration, 10.6.3. The Set Ruleset Command

(see also rules)

check_ : sendmail, 29.10. The check_... Rule Sets

check_mail rule set : sendmail, 20.2.6. Reject Mail from Spamming or Mail-bombing Sites

debug_dumpstate : sendmail, 26.3.3.3. -- ruleset debug_dumpstate returns stat ..., pv: --

Hubset

sendmail, 11.2. Rule Set S=
sendmail, 11.4. Rule Set Hubset

m4 keywords for : sendmail, 19.4.3. Rules and rule sets

m4 preprocessor and : sendmail, 29.2. Rule Sets and m4

recipient-rewriting : (see R= equate)

rule set 0

sendmail, 9. Rule Set 0
sendmail, 17.3. Rule Set 0
sendmail, 19.6. Alphabetized m4 Macros
sendmail, 29.6. Rule Set 0
mailertables : sendmail, 19.6. Alphabetized m4 Macros

rule set 1

sendmail, 11.7. Rule Set 1
sendmail, 19.6. Alphabetized m4 Macros
sendmail, 29.9. Rule Set 1

rule set 2

sendmail, 19.6. Alphabetized m4 Macros
sendmail, 29.8. Rule Set 2

rule set 3

sendmail, 10. Rule Set 3
sendmail, 17.1. Rule Set 3
sendmail, 19.6. Alphabetized m4 Macros
sendmail, 29.4. Rule Set 3
sendmail, 38.6.3. Rule 3 Always Called First with -bt

rule set 4

sendmail, 17.4. Rule Set 4
sendmail, 29.5. Rule Set 4

rule set 5

sendmail, 19.6. Alphabetized m4 Macros
sendmail, 29.7. Rule Set 5
sendmail, 30.8. Alphabetized F= Flags

rule set 96 : sendmail, 17.2. Rule Set 96

S= and : (see S= equate)

sender-rewriting : (see S= equate)

rule-testing mode

sendmail, 36.7. Alphabetized Reference
sendmail, 38. Rule-Set Testing with -bt
debugging and : sendmail, 38.7. Add Debugging for Detail

rules

sendmail, 8.2. Why Rules?

sendmail, 28. Rules

(see also rule sets)

(see protocols, standards)

for address transformation : sendmail, 5.3.3. Rules

LHS and RHS syntax

sendmail, 8.4. Rules
sendmail, 28.4. The Behavior of a Rule

m4 keywords for : sendmail, 19.4.3. Rules and rule sets

mail hub : sendmail, 17. The Hub's Complex Rules

processing flow of

sendmail, 10.5. Details of Rule Flow
sendmail, 29.3. The Sequence of Rule Sets

relays : sendmail, 19.4.5. Relays

rewriting using other rule sets : sendmail, 28.6.4. Rewrite Through Another Rule Set: $>set

showing by rule set : sendmail, 38.4.1. Show Rules in a Rule Set with =S

wildcards operators in : sendmail, 8.7. Wildcard Operators

runacct command : Practical UNIX & Internet Security, 10.2. The acct/pacct Process Accounting File

RunAsUser option : sendmail, 34.8. Alphabetized Reference

ruusend command : Practical UNIX & Internet Security, 15.4.3. L.cmds: Providing Remote Command Execution

rw option (read and write access)

/etc/exports : Practical UNIX & Internet Security, 20.2.1.1. /etc/exports
for Linux systems : TCP/IP Network Administration, 9.1.2.2. The /etc/exports file
for Solaris systems : TCP/IP Network Administration, 9.1.2.1. The share command

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