and later -> or higher

This commit is contained in:
Viktor Szakats 2026-04-22 17:28:29 +02:00
parent a0b616162f
commit c3178ce43b
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@ -270,19 +270,19 @@ logmsg "ssh server found $sshd is $sshdverstr\n" if($verbose);
#***************************************************************************
# ssh daemon command line options we might use and version support
#
# -e: log stderr : OpenSSH 2.9.0 and later
# -f: sshd config file : OpenSSH 1.2.1 and later
# -D: no daemon forking : OpenSSH 2.5.0 and later
# -o: command-line option : OpenSSH 3.1.0 and later
# -t: test config file : OpenSSH 2.9.9 and later
# -?: sshd version info : OpenSSH 1.2.1 and later
# -e: log stderr : OpenSSH 2.9.0 or higher
# -f: sshd config file : OpenSSH 1.2.1 or higher
# -D: no daemon forking : OpenSSH 2.5.0 or higher
# -o: command-line option : OpenSSH 3.1.0 or higher
# -t: test config file : OpenSSH 2.9.9 or higher
# -?: sshd version info : OpenSSH 1.2.1 or higher
#
# -e: log stderr : SunSSH 1.0.0 and later
# -f: sshd config file : SunSSH 1.0.0 and later
# -D: no daemon forking : SunSSH 1.0.0 and later
# -o: command-line option : SunSSH 1.0.0 and later
# -t: test config file : SunSSH 1.0.0 and later
# -?: sshd version info : SunSSH 1.0.0 and later
# -e: log stderr : SunSSH 1.0.0 or higher
# -f: sshd config file : SunSSH 1.0.0 or higher
# -D: no daemon forking : SunSSH 1.0.0 or higher
# -o: command-line option : SunSSH 1.0.0 or higher
# -t: test config file : SunSSH 1.0.0 or higher
# -?: sshd version info : SunSSH 1.0.0 or higher
#***************************************************************************
# Verify minimum ssh daemon version
@ -347,21 +347,21 @@ logmsg "ssh client found $ssh is $sshverstr\n" if($verbose);
#***************************************************************************
# ssh client command line options we might use and version support
#
# -D: dynamic app port forwarding : OpenSSH 2.9.9 and later
# -F: ssh config file : OpenSSH 2.9.9 and later
# -N: no shell/command : OpenSSH 2.1.0 and later
# -p: connection port : OpenSSH 1.2.1 and later
# -v: verbose messages : OpenSSH 1.2.1 and later
# -vv: increase verbosity : OpenSSH 2.3.0 and later
# -V: ssh version info : OpenSSH 1.2.1 and later
# -D: dynamic app port forwarding : OpenSSH 2.9.9 or higher
# -F: ssh config file : OpenSSH 2.9.9 or higher
# -N: no shell/command : OpenSSH 2.1.0 or higher
# -p: connection port : OpenSSH 1.2.1 or higher
# -v: verbose messages : OpenSSH 1.2.1 or higher
# -vv: increase verbosity : OpenSSH 2.3.0 or higher
# -V: ssh version info : OpenSSH 1.2.1 or higher
#
# -D: dynamic app port forwarding : SunSSH 1.0.0 and later
# -F: ssh config file : SunSSH 1.0.0 and later
# -N: no shell/command : SunSSH 1.0.0 and later
# -p: connection port : SunSSH 1.0.0 and later
# -v: verbose messages : SunSSH 1.0.0 and later
# -vv: increase verbosity : SunSSH 1.0.0 and later
# -V: ssh version info : SunSSH 1.0.0 and later
# -D: dynamic app port forwarding : SunSSH 1.0.0 or higher
# -F: ssh config file : SunSSH 1.0.0 or higher
# -N: no shell/command : SunSSH 1.0.0 or higher
# -p: connection port : SunSSH 1.0.0 or higher
# -v: verbose messages : SunSSH 1.0.0 or higher
# -vv: increase verbosity : SunSSH 1.0.0 or higher
# -V: ssh version info : SunSSH 1.0.0 or higher
#***************************************************************************
# Verify minimum ssh client version
@ -375,18 +375,18 @@ if((($sshid =~ /OpenSSH/) && ($sshvernum < 299)) ||
#***************************************************************************
# ssh keygen command line options we actually use and version support
#
# -C: identity comment : OpenSSH 1.2.1 and later
# -f: key filename : OpenSSH 1.2.1 and later
# -N: new passphrase : OpenSSH 1.2.1 and later
# -q: quiet keygen : OpenSSH 1.2.1 and later
# -t: key type : OpenSSH 2.5.0 and later
# -m: key format : OpenSSH 5.6.0 and later
# -C: identity comment : OpenSSH 1.2.1 or higher
# -f: key filename : OpenSSH 1.2.1 or higher
# -N: new passphrase : OpenSSH 1.2.1 or higher
# -q: quiet keygen : OpenSSH 1.2.1 or higher
# -t: key type : OpenSSH 2.5.0 or higher
# -m: key format : OpenSSH 5.6.0 or higher
#
# -C: identity comment : SunSSH 1.0.0 and later
# -f: key filename : SunSSH 1.0.0 and later
# -N: new passphrase : SunSSH 1.0.0 and later
# -q: quiet keygen : SunSSH 1.0.0 and later
# -t: key type : SunSSH 1.0.0 and later
# -C: identity comment : SunSSH 1.0.0 or higher
# -f: key filename : SunSSH 1.0.0 or higher
# -N: new passphrase : SunSSH 1.0.0 or higher
# -q: quiet keygen : SunSSH 1.0.0 or higher
# -t: key type : SunSSH 1.0.0 or higher
$sshdconfig = pp($sshdconfig);
$sshconfig = pp($sshconfig);
@ -499,80 +499,80 @@ else {
#***************************************************************************
# ssh daemon configuration file options we might use and version support
#
# AFSTokenPassing : OpenSSH 1.2.1 and later [1]
# AddressFamily : OpenSSH 4.0.0 and later
# AllowTcpForwarding : OpenSSH 2.3.0 and later
# AllowUsers : OpenSSH 1.2.1 and later
# AuthorizedKeysFile : OpenSSH 2.9.9 and later
# AFSTokenPassing : OpenSSH 1.2.1 or higher [1]
# AddressFamily : OpenSSH 4.0.0 or higher
# AllowTcpForwarding : OpenSSH 2.3.0 or higher
# AllowUsers : OpenSSH 1.2.1 or higher
# AuthorizedKeysFile : OpenSSH 2.9.9 or higher
# AuthorizedKeysFile2 : OpenSSH 2.9.9 till 5.9
# Banner : OpenSSH 2.5.0 and later
# ChallengeResponseAuthentication : OpenSSH 2.5.0 and later
# Ciphers : OpenSSH 2.1.0 and later [3]
# ClientAliveCountMax : OpenSSH 2.9.0 and later
# ClientAliveInterval : OpenSSH 2.9.0 and later
# Compression : OpenSSH 3.3.0 and later
# DenyUsers : OpenSSH 1.2.1 and later
# ForceCommand : OpenSSH 4.4.0 and later [3]
# GatewayPorts : OpenSSH 2.1.0 and later
# GSSAPIAuthentication : OpenSSH 3.7.0 and later [1]
# GSSAPICleanupCredentials : OpenSSH 3.8.0 and later [1]
# GSSAPIKeyExchange : SunSSH 1.0.0 and later [1]
# GSSAPIStoreDelegatedCredentials : SunSSH 1.0.0 and later [1]
# GSSCleanupCreds : SunSSH 1.0.0 and later [1]
# GSSUseSessionCredCache : SunSSH 1.0.0 and later [1]
# HostbasedAuthentication : OpenSSH 2.9.0 and later
# HostbasedUsesNameFromPacketOnly : OpenSSH 2.9.0 and later
# HostKey : OpenSSH 1.2.1 and later
# IgnoreRhosts : OpenSSH 1.2.1 and later
# IgnoreUserKnownHosts : OpenSSH 1.2.1 and later
# KbdInteractiveAuthentication : OpenSSH 2.3.0 and later
# KeepAlive : OpenSSH 1.2.1 and later
# KerberosAuthentication : OpenSSH 1.2.1 and later [1]
# KerberosGetAFSToken : OpenSSH 3.8.0 and later [1]
# KerberosOrLocalPasswd : OpenSSH 1.2.1 and later [1]
# KerberosTgtPassing : OpenSSH 1.2.1 and later [1]
# KerberosTicketCleanup : OpenSSH 1.2.1 and later [1]
# KexAlgorithms : OpenSSH 5.7.0 and later (7.0.0 for '+' support, 7.5.0 for '-' support)
# Banner : OpenSSH 2.5.0 or higher
# ChallengeResponseAuthentication : OpenSSH 2.5.0 or higher
# Ciphers : OpenSSH 2.1.0 or higher [3]
# ClientAliveCountMax : OpenSSH 2.9.0 or higher
# ClientAliveInterval : OpenSSH 2.9.0 or higher
# Compression : OpenSSH 3.3.0 or higher
# DenyUsers : OpenSSH 1.2.1 or higher
# ForceCommand : OpenSSH 4.4.0 or higher [3]
# GatewayPorts : OpenSSH 2.1.0 or higher
# GSSAPIAuthentication : OpenSSH 3.7.0 or higher [1]
# GSSAPICleanupCredentials : OpenSSH 3.8.0 or higher [1]
# GSSAPIKeyExchange : SunSSH 1.0.0 or higher [1]
# GSSAPIStoreDelegatedCredentials : SunSSH 1.0.0 or higher [1]
# GSSCleanupCreds : SunSSH 1.0.0 or higher [1]
# GSSUseSessionCredCache : SunSSH 1.0.0 or higher [1]
# HostbasedAuthentication : OpenSSH 2.9.0 or higher
# HostbasedUsesNameFromPacketOnly : OpenSSH 2.9.0 or higher
# HostKey : OpenSSH 1.2.1 or higher
# IgnoreRhosts : OpenSSH 1.2.1 or higher
# IgnoreUserKnownHosts : OpenSSH 1.2.1 or higher
# KbdInteractiveAuthentication : OpenSSH 2.3.0 or higher
# KeepAlive : OpenSSH 1.2.1 or higher
# KerberosAuthentication : OpenSSH 1.2.1 or higher [1]
# KerberosGetAFSToken : OpenSSH 3.8.0 or higher [1]
# KerberosOrLocalPasswd : OpenSSH 1.2.1 or higher [1]
# KerberosTgtPassing : OpenSSH 1.2.1 or higher [1]
# KerberosTicketCleanup : OpenSSH 1.2.1 or higher [1]
# KexAlgorithms : OpenSSH 5.7.0 or higher (7.0.0 for '+' support, 7.5.0 for '-' support)
# KeyRegenerationInterval : OpenSSH 1.2.1 till 7.3
# ListenAddress : OpenSSH 1.2.1 and later
# LoginGraceTime : OpenSSH 1.2.1 and later
# LogLevel : OpenSSH 1.2.1 and later
# LookupClientHostnames : SunSSH 1.0.0 and later
# MACs : OpenSSH 2.5.0 and later [3]
# Match : OpenSSH 4.4.0 and later [3]
# MaxAuthTries : OpenSSH 3.9.0 and later
# MaxStartups : OpenSSH 2.2.0 and later
# PAMAuthenticationViaKbdInt : OpenSSH 2.9.0 and later [2]
# PasswordAuthentication : OpenSSH 1.2.1 and later
# PermitEmptyPasswords : OpenSSH 1.2.1 and later
# PermitOpen : OpenSSH 4.4.0 and later [3]
# PermitRootLogin : OpenSSH 1.2.1 and later
# PermitTunnel : OpenSSH 4.3.0 and later
# PermitUserEnvironment : OpenSSH 3.5.0 and later
# PidFile : OpenSSH 2.1.0 and later
# Port : OpenSSH 1.2.1 and later
# PrintLastLog : OpenSSH 2.9.0 and later
# PrintMotd : OpenSSH 1.2.1 and later
# Protocol : OpenSSH 2.1.0 and later
# PubkeyAuthentication : OpenSSH 2.5.0 and later
# RhostsAuthentication : OpenSSH 1.2.1 and later
# ListenAddress : OpenSSH 1.2.1 or higher
# LoginGraceTime : OpenSSH 1.2.1 or higher
# LogLevel : OpenSSH 1.2.1 or higher
# LookupClientHostnames : SunSSH 1.0.0 or higher
# MACs : OpenSSH 2.5.0 or higher [3]
# Match : OpenSSH 4.4.0 or higher [3]
# MaxAuthTries : OpenSSH 3.9.0 or higher
# MaxStartups : OpenSSH 2.2.0 or higher
# PAMAuthenticationViaKbdInt : OpenSSH 2.9.0 or higher [2]
# PasswordAuthentication : OpenSSH 1.2.1 or higher
# PermitEmptyPasswords : OpenSSH 1.2.1 or higher
# PermitOpen : OpenSSH 4.4.0 or higher [3]
# PermitRootLogin : OpenSSH 1.2.1 or higher
# PermitTunnel : OpenSSH 4.3.0 or higher
# PermitUserEnvironment : OpenSSH 3.5.0 or higher
# PidFile : OpenSSH 2.1.0 or higher
# Port : OpenSSH 1.2.1 or higher
# PrintLastLog : OpenSSH 2.9.0 or higher
# PrintMotd : OpenSSH 1.2.1 or higher
# Protocol : OpenSSH 2.1.0 or higher
# PubkeyAuthentication : OpenSSH 2.5.0 or higher
# RhostsAuthentication : OpenSSH 1.2.1 or higher
# RhostsRSAAuthentication : OpenSSH 1.2.1 till 7.3
# RSAAuthentication : OpenSSH 1.2.1 till 7.3
# ServerKeyBits : OpenSSH 1.2.1 till 7.3
# SkeyAuthentication : OpenSSH 1.2.1 and later [1]
# StrictModes : OpenSSH 1.2.1 and later
# Subsystem : OpenSSH 2.2.0 and later
# SyslogFacility : OpenSSH 1.2.1 and later
# TCPKeepAlive : OpenSSH 3.8.0 and later
# UseDNS : OpenSSH 3.7.0 and later
# SkeyAuthentication : OpenSSH 1.2.1 or higher [1]
# StrictModes : OpenSSH 1.2.1 or higher
# Subsystem : OpenSSH 2.2.0 or higher
# SyslogFacility : OpenSSH 1.2.1 or higher
# TCPKeepAlive : OpenSSH 3.8.0 or higher
# UseDNS : OpenSSH 3.7.0 or higher
# UseLogin : OpenSSH 1.2.1 till 7.3
# UsePAM : OpenSSH 3.7.0 and later [1][2]
# UsePrivilegeSeparation : OpenSSH 3.2.2 and later
# VerifyReverseMapping : OpenSSH 3.1.0 and later
# X11DisplayOffset : OpenSSH 1.2.1 and later [3]
# X11Forwarding : OpenSSH 1.2.1 and later
# X11UseLocalhost : OpenSSH 3.1.0 and later
# XAuthLocation : OpenSSH 2.1.1 and later [3]
# UsePAM : OpenSSH 3.7.0 or higher [1][2]
# UsePrivilegeSeparation : OpenSSH 3.2.2 or higher
# VerifyReverseMapping : OpenSSH 3.1.0 or higher
# X11DisplayOffset : OpenSSH 1.2.1 or higher [3]
# X11Forwarding : OpenSSH 1.2.1 or higher
# X11UseLocalhost : OpenSSH 3.1.0 or higher
# XAuthLocation : OpenSSH 2.1.1 or higher [3]
#
# [1] Option only available if activated at compile time
# [2] Option specific for portable versions
@ -754,7 +754,7 @@ if(sshd_supports_opt('GSSUseSessionCredCache','no')) {
push @cfgarr, '#';
#***************************************************************************
# Options that might be supported or not in sshd OpenSSH 2.9.9 and later
# Options that might be supported or not in sshd OpenSSH 2.9.9 or higher
#
if(sshd_supports_opt('AddressFamily','any')) {
# Address family must be specified before ListenAddress
@ -887,74 +887,74 @@ else {
#***************************************************************************
# ssh client configuration file options we might use and version support
#
# AddressFamily : OpenSSH 3.7.0 and later
# BatchMode : OpenSSH 1.2.1 and later
# BindAddress : OpenSSH 2.9.9 and later
# ChallengeResponseAuthentication : OpenSSH 2.5.0 and later
# CheckHostIP : OpenSSH 1.2.1 and later
# Cipher : OpenSSH 1.2.1 and later [3]
# Ciphers : OpenSSH 2.1.0 and later [3]
# ClearAllForwardings : OpenSSH 2.9.9 and later
# Compression : OpenSSH 1.2.1 and later
# CompressionLevel : OpenSSH 1.2.1 and later [3]
# ConnectionAttempts : OpenSSH 1.2.1 and later
# ConnectTimeout : OpenSSH 3.7.0 and later
# ControlMaster : OpenSSH 3.9.0 and later
# ControlPath : OpenSSH 3.9.0 and later
# DisableBanner : SunSSH 1.2.0 and later
# DynamicForward : OpenSSH 2.9.0 and later
# EnableSSHKeysign : OpenSSH 3.6.0 and later
# EscapeChar : OpenSSH 1.2.1 and later [3]
# ExitOnForwardFailure : OpenSSH 4.4.0 and later
# ForwardAgent : OpenSSH 1.2.1 and later
# ForwardX11 : OpenSSH 1.2.1 and later
# ForwardX11Trusted : OpenSSH 3.8.0 and later
# GatewayPorts : OpenSSH 1.2.1 and later
# GlobalKnownHostsFile : OpenSSH 1.2.1 and later
# GSSAPIAuthentication : OpenSSH 3.7.0 and later [1]
# GSSAPIDelegateCredentials : OpenSSH 3.7.0 and later [1]
# HashKnownHosts : OpenSSH 4.0.0 and later
# Host : OpenSSH 1.2.1 and later
# HostbasedAuthentication : OpenSSH 2.9.0 and later
# HostKeyAlgorithms : OpenSSH 2.9.0 and later [3]
# HostKeyAlias : OpenSSH 2.5.0 and later [3]
# HostName : OpenSSH 1.2.1 and later
# IdentitiesOnly : OpenSSH 3.9.0 and later
# IdentityFile : OpenSSH 1.2.1 and later
# IgnoreIfUnknown : SunSSH 1.2.0 and later
# KeepAlive : OpenSSH 1.2.1 and later
# KbdInteractiveAuthentication : OpenSSH 2.3.0 and later
# KbdInteractiveDevices : OpenSSH 2.3.0 and later [3]
# LocalCommand : OpenSSH 4.3.0 and later [3]
# LocalForward : OpenSSH 1.2.1 and later [3]
# LogLevel : OpenSSH 1.2.1 and later
# MACs : OpenSSH 2.5.0 and later [3]
# NoHostAuthenticationForLocalhost : OpenSSH 3.0.0 and later
# NumberOfPasswordPrompts : OpenSSH 1.2.1 and later
# PasswordAuthentication : OpenSSH 1.2.1 and later
# PermitLocalCommand : OpenSSH 4.3.0 and later
# Port : OpenSSH 1.2.1 and later
# PreferredAuthentications : OpenSSH 2.5.2 and later
# Protocol : OpenSSH 2.1.0 and later
# ProxyCommand : OpenSSH 1.2.1 and later [3]
# PubkeyAuthentication : OpenSSH 2.5.0 and later
# RekeyLimit : OpenSSH 3.7.0 and later
# RemoteForward : OpenSSH 1.2.1 and later [3]
# RhostsRSAAuthentication : OpenSSH 1.2.1 and later
# RSAAuthentication : OpenSSH 1.2.1 and later
# ServerAliveCountMax : OpenSSH 3.8.0 and later
# ServerAliveInterval : OpenSSH 3.8.0 and later
# SmartcardDevice : OpenSSH 2.9.9 and later [1][3]
# StrictHostKeyChecking : OpenSSH 1.2.1 and later
# TCPKeepAlive : OpenSSH 3.8.0 and later
# Tunnel : OpenSSH 4.3.0 and later
# TunnelDevice : OpenSSH 4.3.0 and later [3]
# UsePAM : OpenSSH 3.7.0 and later [1][2][3]
# UsePrivilegedPort : OpenSSH 1.2.1 and later
# User : OpenSSH 1.2.1 and later
# UserKnownHostsFile : OpenSSH 1.2.1 and later
# VerifyHostKeyDNS : OpenSSH 3.8.0 and later
# XAuthLocation : OpenSSH 2.1.1 and later [3]
# AddressFamily : OpenSSH 3.7.0 or higher
# BatchMode : OpenSSH 1.2.1 or higher
# BindAddress : OpenSSH 2.9.9 or higher
# ChallengeResponseAuthentication : OpenSSH 2.5.0 or higher
# CheckHostIP : OpenSSH 1.2.1 or higher
# Cipher : OpenSSH 1.2.1 or higher [3]
# Ciphers : OpenSSH 2.1.0 or higher [3]
# ClearAllForwardings : OpenSSH 2.9.9 or higher
# Compression : OpenSSH 1.2.1 or higher
# CompressionLevel : OpenSSH 1.2.1 or higher [3]
# ConnectionAttempts : OpenSSH 1.2.1 or higher
# ConnectTimeout : OpenSSH 3.7.0 or higher
# ControlMaster : OpenSSH 3.9.0 or higher
# ControlPath : OpenSSH 3.9.0 or higher
# DisableBanner : SunSSH 1.2.0 or higher
# DynamicForward : OpenSSH 2.9.0 or higher
# EnableSSHKeysign : OpenSSH 3.6.0 or higher
# EscapeChar : OpenSSH 1.2.1 or higher [3]
# ExitOnForwardFailure : OpenSSH 4.4.0 or higher
# ForwardAgent : OpenSSH 1.2.1 or higher
# ForwardX11 : OpenSSH 1.2.1 or higher
# ForwardX11Trusted : OpenSSH 3.8.0 or higher
# GatewayPorts : OpenSSH 1.2.1 or higher
# GlobalKnownHostsFile : OpenSSH 1.2.1 or higher
# GSSAPIAuthentication : OpenSSH 3.7.0 or higher [1]
# GSSAPIDelegateCredentials : OpenSSH 3.7.0 or higher [1]
# HashKnownHosts : OpenSSH 4.0.0 or higher
# Host : OpenSSH 1.2.1 or higher
# HostbasedAuthentication : OpenSSH 2.9.0 or higher
# HostKeyAlgorithms : OpenSSH 2.9.0 or higher [3]
# HostKeyAlias : OpenSSH 2.5.0 or higher [3]
# HostName : OpenSSH 1.2.1 or higher
# IdentitiesOnly : OpenSSH 3.9.0 or higher
# IdentityFile : OpenSSH 1.2.1 or higher
# IgnoreIfUnknown : SunSSH 1.2.0 or higher
# KeepAlive : OpenSSH 1.2.1 or higher
# KbdInteractiveAuthentication : OpenSSH 2.3.0 or higher
# KbdInteractiveDevices : OpenSSH 2.3.0 or higher [3]
# LocalCommand : OpenSSH 4.3.0 or higher [3]
# LocalForward : OpenSSH 1.2.1 or higher [3]
# LogLevel : OpenSSH 1.2.1 or higher
# MACs : OpenSSH 2.5.0 or higher [3]
# NoHostAuthenticationForLocalhost : OpenSSH 3.0.0 or higher
# NumberOfPasswordPrompts : OpenSSH 1.2.1 or higher
# PasswordAuthentication : OpenSSH 1.2.1 or higher
# PermitLocalCommand : OpenSSH 4.3.0 or higher
# Port : OpenSSH 1.2.1 or higher
# PreferredAuthentications : OpenSSH 2.5.2 or higher
# Protocol : OpenSSH 2.1.0 or higher
# ProxyCommand : OpenSSH 1.2.1 or higher [3]
# PubkeyAuthentication : OpenSSH 2.5.0 or higher
# RekeyLimit : OpenSSH 3.7.0 or higher
# RemoteForward : OpenSSH 1.2.1 or higher [3]
# RhostsRSAAuthentication : OpenSSH 1.2.1 or higher
# RSAAuthentication : OpenSSH 1.2.1 or higher
# ServerAliveCountMax : OpenSSH 3.8.0 or higher
# ServerAliveInterval : OpenSSH 3.8.0 or higher
# SmartcardDevice : OpenSSH 2.9.9 or higher [1][3]
# StrictHostKeyChecking : OpenSSH 1.2.1 or higher
# TCPKeepAlive : OpenSSH 3.8.0 or higher
# Tunnel : OpenSSH 4.3.0 or higher
# TunnelDevice : OpenSSH 4.3.0 or higher [3]
# UsePAM : OpenSSH 3.7.0 or higher [1][2][3]
# UsePrivilegedPort : OpenSSH 1.2.1 or higher
# User : OpenSSH 1.2.1 or higher
# UserKnownHostsFile : OpenSSH 1.2.1 or higher
# VerifyHostKeyDNS : OpenSSH 3.8.0 or higher
# XAuthLocation : OpenSSH 2.1.1 or higher [3]
#
# [1] Option only available if activated at compile time
# [2] Option specific for portable versions