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Index: R

rain : (see water)

RAM theft : 12.2.6. Preventing Theft

rand function : 23.7.1. rand ( )

random device : 23.7.4. Other random number generators

random function : 23.7.2. random ( )

random numbers : 23.6. Tips on Generating Random Numbers

raw devices : 5.6. Device Files

rc directory : C.5.1. Process #1: /etc/init

RC2, RC4, and RC5 algorithms

6.4.1. Summary of Private Key Systems
6.4.8. Proprietary Encryption Systems

RC4 and RC5 algorithms : 6.4.1. Summary of Private Key Systems

rcp command

1.4.3. Add-On Functionality Breeds Problems
7.4.5. Backups Across the Net

RCS (Revision Control System)

7.3.2. Building an Automatic Backup System
17.3. Primary UNIX Network Services

rdist program

7.4.5. Backups Across the Net
9.2.1.3. rdist

rdump/rrestore program : 7.4.5. Backups Across the Net

read permission

5.1.7. File Permissions in Detail
5.4. Using Directory Permissions

read system call : 5.1.7. File Permissions in Detail

time-outs on : 23.3. Tips on Writing Network Programs

read-only exporting filesystems : 11.6.1.2. Writable system files and directories

read-only filesystems : 9.1.2. Read-only Filesystems

READ= command : 15.5.2. Permissions Commands

readdir library call : 5.4. Using Directory Permissions

real UIDs/GIDs

4.3.1. Real and Effective UIDs
C.1.3.2. Process real and effective UID

realpath function : 23.2. Tips on Avoiding Security-related Bugs

reauthentication

Kerberos : 19.6.4. Using Kerberos
Secure RPC : 19.3.1.3. Setting the window

Receive Data (RD) : 14.3. The RS-232 Serial Protocol

Redman, Brian E. : 15.2. Versions of UUCP

refer_log file : 18.4.2. Eavesdropping Through Log Files

reflectors (in Enigma system) : 6.3. The Enigma Encryption System

reformatting attack : 25.1. Destructive Attacks

relative humidity : 12.2.1.11. Humidity

relative pathnames : 5.1.3. Current Directory and Paths

remote

command execution

15.1.2. uux Command
15.4.3. L.cmds: Providing Remote Command Execution
17.3.17. rexec (TCP Port 512)

comparison copies : 9.2.1.2. Remote copies

computers

transferring files to : 15.1.1. uucp Command

file access (UUCP)

15.4.1. USERFILE: Providing Remote File Access
15.4.2.1. Some bad examples

network filesystems : 5.5.5. Turning Off SUID and SGID in Mounted Filesystems

procedure calls : (see RPCs)

remote file

10.3.1. aculog File
14.5.1. Hooking Up a Modem to Your Computer

remote.unknown file : 15.5. Security in BNU UUCP

renice command

25.2.1.2. System overload attacks
C.1.3.3. Process priority and niceness

replay attacks

17.3.14. Network Time Protocol (NTP) (UDP Port 123)
19.6.1.2. Using the ticket granting ticket

reporting security holes : 2.5.1. Going Public

Request to Send (RTS) : 14.3. The RS-232 Serial Protocol

REQUEST= command

15.5.1.3. A Sample Permissions file
15.5.2. Permissions Commands

reserved memory space : 25.2.2.6. Reserved space

resolution, time : 23.8. Picking a Random Seed

resolver library (bind) : 16.2.6.1. DNS under UNIX

resolving (DNS) : 17.3.6. Domain Name System (DNS) (TCP and UDP Port 53)

response teams

27.3.5. Response Personnel?
F.3. Emergency Response Organizations
F.3.4.46. Westinghouse Electric Corporation
mailing lists for : E.1.1. Response Teams and Vendors

restore : (see dump/restore program)

restricted

filesystems

8.1.5. Restricted Filesystem
8.1.5.2. Checking new software

FTP : 17.3.2.5. Restricting FTP with the standard UNIX FTP server

logins : 8.3. Restricting Logins

shells

8.1.4.1. Restricted shells under System V UNIX
8.1.4.6. Potential problems with rsh

su use : 4.3.6. Restricting su

restrictmailq (sendmail) : 17.3.4.3. Improving the security of Berkeley sendmail V8

retention of backups

7.1.5. How Long Should You Keep a Backup?
7.2.2.2. Retention schedule
(see also networks, backing up)

return calls : 23.2. Tips on Avoiding Security-related Bugs

reverse lookup

16.3.2. Security and Nameservice
23.3. Tips on Writing Network Programs

Revision Control System (RCS)

7.3.2. Building an Automatic Backup System
17.3. Primary UNIX Network Services

revocation certificate : 6.6.3.2. Creating your PGP public key

rexd service : 19.2.2.4. AUTH_KERB

rexec service : 17.3.17. rexec (TCP Port 512)

RFC 1750 : 23.8. Picking a Random Seed

.rhosts file

10.4.3. Network Setup
17.3.18.4. The ~/.rhosts file
17.3.18.5. Searching for .rhosts files
back door in : 11.1.2. Back Doors and Trap Doors
intruder's changes to : 24.4.1.4. Changes in .rhosts files
searching for : 17.3.18.5. Searching for .rhosts files

Ring Indicator (RI) : 14.3. The RS-232 Serial Protocol

RIP (Routing Internet Protocol) : 17.3.19. Routing Internet Protocol (RIP routed) (UDP Port 520)

risk assessment

2.2. Risk Assessment
2.2.2. Review Your Risks
2.5.3. Final Words: Risk Management Means Common Sense

risks : (see threats)

Ritchie, Dennis : 1.3. History of UNIX

Rivest, Ronald L.

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

RJE (Remote Job Entry) : 3.2.1. The /etc/passwd File

rlogin command

1.4.3. Add-On Functionality Breeds Problems
3.5. Verifying Your New Password
16.3.2. Security and Nameservice
17.3.18. rlogin and rsh (TCP Ports 513 and 514)
17.3.18.6. /etc/hosts.lpd file
versus Telnet : 17.3.18. rlogin and rsh (TCP Ports 513 and 514)

rlogind command : 17.3.18. rlogin and rsh (TCP Ports 513 and 514)

rm command

5.4. Using Directory Permissions
15.4.3. L.cmds: Providing Remote Command Execution
and deep tree structures : 25.2.2.8. Tree-structure attacks

rmail program : 15.4.3. L.cmds: Providing Remote Command Execution

root account

4. Users, Groups, and the Superuser

4.1. Users and Groups

4.2.1. The Superuser

4.2.1.5. The problem with the superuser

5.5.2. Problems with SUID

(see also superuser)

abilities of : 27.1.3. What the Superuser Can and Cannot Do

chroot

8.1.5. Restricted Filesystem
8.1.5.2. Checking new software

immutable files and : 9.1.1. Immutable and Append-Only Files

network services with : 17.4. Security Implications of Network Services

protecting

8.5. Protecting the root Account
8.5.3.2. Trusted computing base

on remote machine, fingering : 24.2.4.2. How to contact the system administrator of a computer you don't know

single-command accounts and : 8.1.3. Accounts That Run a Single Command

web server as : 18.2.1. The Server's UID

root directory : 5.1.1. Directories

backups of : 7.1.3. Types of Backups
UUCP access from : 15.4.2.1. Some bad examples

root option for /etc/exports : 20.2.1.1. /etc/exports

ROT13 algorithm

6.4.1. Summary of Private Key Systems
6.4.3. ROT13: Great for Encoding Offensive Jokes

rotating backup media

7.1.3. Types of Backups
7.2.1.2. Media rotation

routed daemon : 17.3.19. Routing Internet Protocol (RIP routed) (UDP Port 520)

routers, intelligent : 21.2.3. Setting Up the Choke

routing : 16.2.2. Routing

Routing Internet Protocol : (see RIP)

RPC table (NIS+) : 19.5.3. NIS+ Tables

rpc.rexdserver : 17.3.22. RPC rpc.rexd (TCP Port 512)

rpcbind : (see portmapper program)

RPCs (remote procedure calls)

17.3.22. RPC rpc.rexd (TCP Port 512)

19. RPC, NIS, NIS+, and Kerberos

19.7.2. SESAME

authentication of

19.2.2. RPC Authentication
19.2.2.4. AUTH_KERB

portmapper program : 17.3.11. Sun RPC's portmapper (UDP and TCP Ports 111)

Secure : (see Secure RPC)

spoofing : 19.4.4.4. Spoofing RPC

RS-232 serial protocol : 14.3. The RS-232 Serial Protocol

RSA algorithm

6.4.2. Summary of Public Key Systems
6.4.6. RSA and Public Key Cryptography
6.4.6.3. Strength of RSA
6.5.3. Digital Signatures

rsh (restricted shell)

8.1.4.1. Restricted shells under System V UNIX
8.1.4.6. Potential problems with rsh
17.3.18. rlogin and rsh (TCP Ports 513 and 514)
17.3.18.6. /etc/hosts.lpd file

rsh command : 16.3.2. Security and Nameservice

rshd program : 11.1.2. Back Doors and Trap Doors

RUID : (see real UIDs/GIDs)

runacct command : 10.2. The acct/pacct Process Accounting File

ruusend command : 15.4.3. L.cmds: Providing Remote Command Execution

rw option for /etc/exports : 20.2.1.1. /etc/exports

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