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Index: S

• scp2: scp2/sftp Details
• • compatibility with scp1: SSH1/SSH2 Compatibility
  • debugging: Logging and Debugging
  • regular expressions: SSH2 Manpage for sshregex
• scp (Secure Copy Program): Secure File Transfer
• • File Transfer with scp
  • File Transfer with scp
  • Secure Copy with scp
  • authentication through local agents: Agent Forwarding
  • broken features, unexpected behaviors: General client problems
  • command line, failure of wildcards or shell variables: scp
  • command-line options: scp behavior
  • compile-time configuration: scp behavior
  • copy access to your account, allowing others: scp
  • display of statistics: scp behavior
  • double-remote copying: More Complex Passphrase Problem
  • environment variables: scp behavior
  • • scp1 statistics
  • error messages
  • • "Not a regular file": scp
    • "packet too long": scp
    • "Write failed after flushing stdout buffer. write stdout. Broken pipe.": scp
  • failure of copy to remote machine: scp
  • file ownership, preserving in copied files: scp
  • gateway hosts and: Using SCP Through a Gateway
  • keywords: ssh and scp Keywords
  • options: scp Options
  • protocols: SSH and File Transfers (scp and sftp)
  • statistics display: Statistics Display
  • syntax: File Transfer with scp
  • • Full Syntax
  • troubleshooting wildcards and shell variables: Server Debugging
• SecPanel: Other SSH-Related Products
• secrecy, keys and passphrases: Generating Key Pairs with ssh-keygen
• secret-key ciphers: Public- and Secret-Key Cryptography
• SECSH (Secure Shell) working group: History of SSH
• secure channel: Remote Terminal Sessions with ssh
• Secure Copy Program (see SCP)
• Secure Socket Layers (SSL): Secure Socket Layer (SSL) Protocol
• SecureCRT: Table of Products
• • SecureCRT (Windows)
  • authentication methods: Mandatory Fields
  • client configuration: Basic Client Use
  • data compression: Data Compression
  • encryption algorithms, specification: Mandatory Fields
  • forwarding: Forwarding
  • identities: Using Multiple Identities
  • installing: Obtaining and Installing
  • key management: Key Management
  • keys, generating: RSA Key Generation Wizard
  • keys, installing: RSA Key Generation Wizard
  • port forwarding: Port Forwarding
  • ports: Mandatory Fields
  • protocols: Mandatory Fields
  • secure file copy with ZModem: SecureCRT (Windows)
  • session and global options: Advanced Client Use
  • Session Options window, mandatory fields: Mandatory Fields
  • sessions: Basic Client Use
  • SOCKS: Firewall Use
  • TIS authentication: TIS Authentication
  • troubleshooting: Troubleshooting
  • X forwarding: Forwarding
• SecureFX: FTP Forwarding
• • Table of Products
• SecureKoalaTerm: Table of Products
• SecurID
• • authentication using: One-time passwords
  • • SecurID authentication
  • compile-time configuration: Authentication
• security
• • account permissions: Installing a Public Key on an SSH ServerMachine
  • methods for remote account access: Introduction to SSH
  • per-account configuration: Limits of This Technique
  • remote logins: Secure Remote Logins
  • violations: Known Hosts
  • • Integrity
• security threats
• • countered by SSH: Threats SSH Can Counter
  • dictionary attack: Installing a Public Key on an SSH ServerMachine
  • not countered by SSH: Threats SSH Doesn't Prevent
• seeds: Randomness
• sendport command: FTP with the default data ports
• sequence numbers, for one-time password systems: S/Key authentication
• Sergey Okhapkin (see Okhapkin's SSH1)
• server authentication: Authentication
• • Establishing the Secure Connection
• server configuration
• • per-account: Per-Account Server Configuration
  • three levels of: Our Approach
• server keys: The Architecture of an SSH System
• • generating: Server Key Generation
  • • recommended settings for: /etc/sshd_config
• server names: The Name of the Server
• ServerKeyBits: Server Key Generation
• servers: The Architecture of an SSH System
• • Compilation Flags
  • configuration files: Server Configuration Files
  • debugging: Server Debugging
  • logging: History, Logging, and Debugging
• serverwide configuration: Our Approach
• • Compile-Time Configuration
  • Serverwide Configuration
  • Serverwide Configuration
  • command-line options: Command-Line Options
  • files, commenting: Server Configuration Files
  • modifying: Changing the Configuration
  • port forwarding: Serverwide configuration
  • precedence rules: Command-Line Options
  • • Tricky Reconfiguration Example
• session identifiers: Establishing the Secure Connection
• session keys: The Architecture of an SSH System
• • Session key exchange and the server key
  • double-encryption: Establishing the Secure Connection
  • generation by client: Establishing the Secure Connection
• sessions: The Architecture of an SSH System
• • client-server key exchange, SSH-2: Session key exchange and the server key
  • rekeying for improved security: Session rekeying
• setuid client, security risks under SSH1: Setuid client
• setuid programs: Installation, files, and directories
• sftp2 error messages: sftp2
• sftp protocol: SSH and File Transfers (scp and sftp)
• sftp2, regular expressions: SSH2 Manpage for sshregex
• sftp-server: SSH and File Transfers (scp and sftp)
• sftp (SSH2): sftp
• • scp2/sftp Details
  • ASCII vs. binary transfer: sftp
  • command-line options: sftp
  • vs. ftp: sftp
• SHA-1 (Secure Hash Algorithm): SHA-1
• shadow files: Compilation Flags
• SHELL environment variable: The SSH Agent
• shell escapes, from within forced commands: Security issues
• .shosts: Trusted-host access files
• • shosts access control
  • ownership: The Basics
  • permissions: Acceptable permissions for user files
  • syntax: Control file details
• shosts access control: shosts access control
• shosts.equiv file: Trusted-host access files
• • shosts access control
  • syntax: Control file details
• SIGHUP signal: Changing the Configuration
• signer: The Architecture of an SSH System
• SilentDeny: Hostname access control
• • recommended settings: /etc/sshd_config
• S/Key
• • authentication using: S/Key authentication
  • enabling in OpenSSH: Compilation Flags
• S/Key software OTP system: One-time passwords
• SKeyAuthentication: S/Key authentication
• slogin (SSH1): slogin
• sockets: Local Forwarding
• • ssh-agent: Access control
• SOCKS: Proxies and SOCKS
• • compile-time configuration: SOCKS proxy support
  • configuration flags: SOCKS proxy support
  • OpenSSH: SOCKS in OpenSSH
  • SSH1: SOCKS in SSH1
  • trusted-host authentication issues: Other SOCKS issues
• SOCKS5_NONETMASKCHECK: SOCKS in SSH1
• SOCKS5_PASSWD: SOCKS in SSH1
• SocksServer: SOCKS proxy support
• • SOCKS in SSH2
  • SOCKS in SSH2
• SOCKS5_USER: SOCKS in SSH1
• Solaris operating system
• • OpenSSH-incompatible Kerberos-4: Kerberos on Solaris
• SO_LINGER: TCP/IP support
• SO_LINGER socket flag: TCP/IP support
• spoofing attacks: Name Service and IP Spoofing
• SRP (Secure Remote Password): Secure Remote Password (SRP)
• srvtab file: Kerberos-4 in OpenSSH
• • Kerberos-4 in OpenSSH
• ssh1
• • error messages
  • • "Cannot fork into background without a command to execute": ssh
    • "channel_request_remote_forwarding\: too many forwards": ssh
    • "Hostname or username is longer than 255 characters": ssh
    • "No host key is known for and you have requested strict checking...": ssh
    • "Selected cipher type... not supported by server": ssh
    • "Too many identity files specified": ssh
  • setuid root: Installation, files, and directories
• SSH-1
• • authentication methods: Client Authentication
  • client authentication: Trusted-host authentication (Rhosts and RhostsRSA)
  • protocols: Inside SSH-1
  • trusted-host authentication: Trusted-host authentication (Rhosts and RhostsRSA)
• SSH-1 protocol: History of SSH
• SSH-2 protocols: History of SSH
• • Inside SSH-2
  • vs. SSH-1: Inside SSH-2
• ssh-add: The SSH Agent
• • Key Management and Agents
  • SSH Agents
  • Loading Keys with ssh-add
  • error message
  • • "Could not open a connection to your authentication agent": ssh-agent and ssh-add
    • • ssh-agent and ssh-add
  • listing keys: The SSH Agent
  • options: ssh-add Options
  • reading input: The SSH Agent
• ssh-agent: The SSH Agent
• • Key Management and Agents
  • SSH Agents
  • environment variables: Format of environment variable commands
  • failure to terminate after logout: ssh-agent and ssh-add
  • options: ssh-agent Options
  • precedence of keys: Switching Identities with an Agent
  • proper invocation with eval command: Single-shell method
  • terminating: Single-shell method
• SSH1 and SSH2 (products): SSH1 and SSH2
• • ftp sources: Obtaining the Distribution
• SSH-ARCH: Protocol Differences (SSH-1 Versus SSH-2)
• ssh-askpass: The SSH Agent
• • Loading Keys with ssh-add
• SSH-AUTH: Protocol Differences (SSH-1 Versus SSH-2)
• SSH Communications Security, Ltd.: History of SSH
• • F-Secure SSH Server
• SSH-CONN: Protocol Differences (SSH-1 Versus SSH-2)
• .ssh directory
• • permissions: Acceptable permissions for user files
• ssh-keygen: Generating Key Pairs with ssh-keygen
• • The Architecture of an SSH System
  • Key Management and Agents
  • Creating an Identity
  • default identity overwrite problem: ssh-keygen
  • detection of RSA support, OpenSSH: Generating RSA/DSA Keys for OpenSSH
  • host key generation by an ordinary user: Running as an Ordinary User
  • Windows ports: Create a Key Pair
• ssh-keyscan: Other SSH-Related Products
• ssh-probe2: Discovering other servers
• ~/ssh/rc files: Arbitrary Actions with /etc/sshrc
• SSH2 product: History of SSH
• SSH (product for BeOS): Table of Products
• SSH Protocol Architecture: Protocol Differences (SSH-1 Versus SSH-2)
• SSH-related files, securing: /etc/ssh2/sshd2_config
• SSH (Secure Shell): Introduction to SSH
• • agents: SSH Agents
  • architecture: What Is SSH?
  • • The Architecture of an SSH System
  • authentication systems, supported: Authentication
  • clients
  • • initiating remote terminal sessions: Remote Terminal Sessions with ssh
    • troubleshooting: General client problems
  • connecting through gateway hosts: Connecting Through a GatewayHost
  • connections, terminating: Termination
  • difference between products, commands, and protocols: Protocols, Products, Clients, and Confusion
  • features: Protect Your Network with SSH
  • history: History of SSH
  • identity filenames, different versions: Generating Key Pairs with ssh-keygen
  • implementations, common features: Common Features
  • inclusion in TCP/IP services map: Invocation by inetd
  • Kerberos: Comparing SSH and Kerberos
  • mailing lists: Mailing Lists
  • non-Unix implementations: Overview of Other Implementations
  • products
  • • denotation: Protocols, Products, Clients, and Confusion
    • extraction of zipped files: Extracting the files
    • features: Features
    • verification with PGP: Verifying with PGP
  • protocols: The SSH Protocol
  • • documentation: Inside SSH
    • features: Overview of Features
    • supported encryption algorithms: Privacy (Encryption)
    • version strings: Establishing the Secure Connection
  • recommended configuration: Recommended Setup
  • reporting bugs: Reporting Bugs
  • running as ordinary user: Running as an Ordinary User
  • running as superuser: Running as the Superuser
  • servers
  • • invocation: Running the Server
    • server names: The Name of the Server
  • table of product features: Table of Products
  • top ten questions: Server Debugging
  • troubleshooting: Troubleshooting and FAQ
  • Usenet newsgroups: Usenet Newsgroups
  • versions: Supported Platforms
  • websites: Web Sites
  • • Overview of Other Implementations
• SSH Secure Shell (product): Table of Products
• ssh-signer2: Setuid client
• • Installation, files, and directories
  • Program Locations
• SSH-TRANS: Protocol Differences (SSH-1 Versus SSH-2)
• Ssh1AgentCompatibility (keyword, SSH2): SSH1/SSH2 Compatibility
• SSH_ALL_SCP_STATS: scp behavior
• • scp1 statistics
• SSH_AUTH_SOCK: Using an agent
• sshCE: Table of Products
• SSH_CLIENT: Forcing a nonprivileged local port
• SSH2_CLIENT environment variable
• • simulating SSH1 from feature in SSH2: Simulating "from" with SSH2
• Ssh1Compatibility: Compatibility Between SSH-1 and SSH-2 Servers
• • SSH1/SSH2 Compatibility
  • recommended setting: /etc/ssh2/sshd2_config
• ssh2_config file: Global and local files
• sshd
• • configuration: Serverwide Configuration
  • configuration file
  • • alternate: Server Configuration Files
    • • Server configuration file
  • configuration files: Server Configuration Files
  • forcing recognition, new config files: sshd_config, sshd2_config
  • keywords: sshd Keywords
  • options: sshd Options
  • Windows ports: Obtaining and Installing Clients
  • • Obtaining and Installing the Server
• sshd1 default path: User logins and shells
• sshd2_config: Server Configuration Files
• • Server Configuration Files
  • Subsystems
  • recommended settings: /etc/ssh2/sshd2_config
• sshdfwd: TCP-wrappers Configuration
• sshdfwd-x11: TCP-wrappers Configuration
• SSHDOS: Table of Products
• Sshd1Path: Compatibility Between SSH-1 and SSH-2 Servers
• sshd.pid: Changing the Configuration
• ssh.el: Other SSH-Related Products
• sshexec.com: Table of Products
• ssh_known_hosts file: Host keys
• • Creating the Serverwide Known-Hosts File
  • Host Keys and Known-Hosts Databases
• SSH_NO_ALL_SCP_STATS: scp behavior
• • scp1 statistics
• SSH_NO_SCP_STATS: scp behavior
• • scp1 statistics
• SSH_ORIGINAL_COMMAND: Examining the client's original command
• • Passing along the remote command
• SSHOS2: Table of Products
• Ssh1Path: SSH1/SSH2 Compatibility
• ssh.pid file, path specification: Compilation Flags
• ssh_prng_cmds: Randomness
• • Randomness
• sshregex: SSH2 Manpage for sshregex
• SSH_SCP_STATS: scp behavior
• • scp1 statistics
• SshSignerPath: Program Locations
• SSH_SOCKS_SERVER: SOCKS proxy support
• • SOCKS in SSH2
• SSH_TTY environment variables: Pseudo-terminal allocation (TTY/PTY/PTTY)
• • Disabling TTY Allocation
• SSL (Secure Socket Layers): Secure Socket Layer (SSL) Protocol
• • TCP-based applications, enhanced with: SSL-Enhanced Telnet and FTP
• starting agents: Starting an Agent
• StrictHostKeyChecking: Strict host key checking
• StrictModes: Acceptable permissions for user files
• • recommended setting: /etc/sshd_config
• stunnel: stunnel
• subsystems: Server Configuration Files
• • Subsystems
• subsystems (SSH2): Subsystems
• swapping, security risks of: NFS Security Risks
• symbolic links, created by SSH installations: SSH1 and SSH2 on the same machine
• symmetric ciphers (see cryptography)
• SYN flood attacks: IP and TCP Attacks
• syslog: Logging and SSH1
• • Logging and SSH1
• SyslogFacility: Logging and OpenSSH
• • Logging and OpenSSH

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