You will need working installations of Zlib and OpenSSL.
-Zlib:
-http://www.freesoftware.com/pub/infozip/zlib/
+Zlib 1.1.4 or 1.2.1.2 or greater (ealier 1.2.x versions have problems):
+http://www.gzip.org/zlib/
-OpenSSL 0.9.5a or greater:
+OpenSSL 0.9.6 or greater:
http://www.openssl.org/
-RPMs of OpenSSL are available at http://violet.ibs.com.au/openssh/files/support
+(OpenSSL 0.9.5a is partially supported, but some ciphers (SSH protocol 1
+Blowfish) do not work correctly.)
-OpenSSH can utilise Pluggable Authentication Modules (PAM) if your system
-supports it. PAM is standard on Redhat and Debian Linux, Solaris and
-HP-UX 11.
+The remaining items are optional.
+
+NB. If you operating system supports /dev/random, you should configure
+OpenSSL to use it. OpenSSH relies on OpenSSL's direct support of
+/dev/random, or failing that, either prngd or egd. If you don't have
+any of these you will have to rely on ssh-rand-helper, which is inferior
+to a good kernel-based solution or prngd.
+
+PRNGD:
+
+If your system lacks kernel-based random collection, the use of Lutz
+Jaenicke's PRNGd is recommended.
+
+http://prngd.sourceforge.net/
+
+EGD:
+
+The Entropy Gathering Daemon (EGD) is supported if you have a system which
+lacks /dev/random and don't want to use OpenSSH's internal entropy collection.
+
+http://www.lothar.com/tech/crypto/
PAM:
-http://www.kernel.org/pub/linux/libs/pam/
+
+OpenSSH can utilise Pluggable Authentication Modules (PAM) if your
+system supports it. PAM is standard most Linux distributions, Solaris,
+HP-UX 11, AIX >= 5.2, FreeBSD and NetBSD.
+
+Information about the various PAM implementations are available:
+
+Solaris PAM: http://www.sun.com/software/solaris/pam/
+Linux PAM: http://www.kernel.org/pub/linux/libs/pam/
+OpenPAM: http://www.openpam.org/
If you wish to build the GNOME passphrase requester, you will need the GNOME
libraries and headers.
GNOME:
http://www.gnome.org/
-Alternatively, Jim Knoble <jmknoble@jmknoble.cx> has written an excellent X11
+Alternatively, Jim Knoble <jmknoble@pobox.com> has written an excellent X11
passphrase requester. This is maintained separately at:
-http://www.ntrnet.net/~jmknoble/software/x11-ssh-askpass/index.html
+http://www.jmknoble.net/software/x11-ssh-askpass/
-PRNGD:
+TCP Wrappers:
-If your system lacks Kernel based random collection, the use of Lutz
-Jaenicke's PRNGd is recommended.
+If you wish to use the TCP wrappers functionality you will need at least
+tcpd.h and libwrap.a, either in the standard include and library paths,
+or in the directory specified by --with-tcp-wrappers. Version 7.6 is
+known to work.
-http://www.aet.tu-cottbus.de/personen/jaenicke/postfix_tls/prngd.html
+http://ftp.porcupine.org/pub/security/index.html
-EGD:
+S/Key Libraries:
-The Entropy Gathering Daemon (EGD) is supported if you have a system which
-lacks /dev/random and don't want to use OpenSSH's internal entropy collection.
+If you wish to use --with-skey then you will need the library below
+installed. No other S/Key library is currently known to be supported.
-http://www.lothar.com/tech/crypto/
+http://www.sparc.spb.su/solaris/skey/
-GNU Make:
-ftp://ftp.gnu.org/gnu/make/
+LibEdit:
-OpenSSH has only been tested with GNU make. It may work with other
-'make' programs, but you are on your own.
+sftp supports command-line editing via NetBSD's libedit. If your platform
+has it available natively you can use that, alternatively you might try
+these multi-platform ports:
-pcre (POSIX Regular Expression library):
-ftp://ftp.cus.cam.ac.uk/pub/software/programs/pcre/
+http://www.thrysoee.dk/editline/
+http://sourceforge.net/projects/libedit/
-Most platforms do not required this. However older 4.3 BSD do not
-have a posix regex library.
+Autoconf:
-S/Key Libraries:
-http://www.sparc.spb.su/solaris/skey/
+If you modify configure.ac or configure doesn't exist (eg if you checked
+the code out of CVS yourself) then you will need autoconf-2.61 to rebuild
+the automatically generated files by running "autoreconf". Earlier
+versions may also work but this is not guaranteed.
+
+http://www.gnu.org/software/autoconf/
+
+Basic Security Module (BSM):
+
+Native BSM support is know to exist in Solaris from at least 2.5.1,
+FreeBSD 6.1 and OS X. Alternatively, you may use the OpenBSM
+implementation (http://www.openbsm.org).
-If you wish to use --with-skey then you will need the above library
-installed. No other current S/Key library is currently known to be
-supported.
2. Building / Installation
--------------------------
make
make install
-Will install OpenSSH in /opt/{bin,etc,lib,sbin}. You can also override
+Will install OpenSSH in /opt/{bin,etc,lib,sbin}. You can also override
specific paths, for example:
./configure --prefix=/opt --sysconfdir=/etc/ssh
This will install the binaries in /opt/{bin,lib,sbin}, but will place the
configuration files in /etc/ssh.
-If you are using PAM, you may need to manually install a PAM
-control file as "/etc/pam.d/sshd" (or wherever your system
-prefers to keep them). A generic PAM configuration is included as
-"contrib/sshd.pam.generic", you may need to edit it before using it on
-your system. If you are using a recent version of Redhat Linux, the
-config file in contrib/redhat/sshd.pam should be more useful.
-Failure to install a valid PAM file may result in an inability to
-use password authentication. On HP-UX 11, the standard /etc/pam.conf
-configuration will work with sshd (sshd will match the OTHER service
+If you are using Privilege Separation (which is enabled by default)
+then you will also need to create the user, group and directory used by
+sshd for privilege separation. See README.privsep for details.
+
+If you are using PAM, you may need to manually install a PAM control
+file as "/etc/pam.d/sshd" (or wherever your system prefers to keep
+them). Note that the service name used to start PAM is __progname,
+which is the basename of the path of your sshd (e.g., the service name
+for /usr/sbin/osshd will be osshd). If you have renamed your sshd
+executable, your PAM configuration may need to be modified.
+
+A generic PAM configuration is included as "contrib/sshd.pam.generic",
+you may need to edit it before using it on your system. If you are
+using a recent version of Red Hat Linux, the config file in
+contrib/redhat/sshd.pam should be more useful. Failure to install a
+valid PAM file may result in an inability to use password
+authentication. On HP-UX 11 and Solaris, the standard /etc/pam.conf
+configuration will work with sshd (sshd will match the other service
name).
There are a few other options to the configure script:
---with-rsh=PATH allows you to specify the path to your rsh program.
-Normally ./configure will search the current $PATH for 'rsh'. You
-may need to specify this option if rsh is not in your path or has a
-different name.
+--with-audit=[module] enable additional auditing via the specified module.
+Currently, drivers for "debug" (additional info via syslog) and "bsm"
+(Sun's Basic Security Module) are supported.
---without-pam will disable PAM support. PAM is automatically detected
-and switched on if found.
+--with-pam enables PAM support. If PAM support is compiled in, it must
+also be enabled in sshd_config (refer to the UsePAM directive).
---enable-gnome-askpass will build the GNOME passphrase dialog. You
-need a working installation of GNOME, including the development
-headers, for this to work.
-
---with-random=/some/file allows you to specify an alternate source of
-random numbers (the default is /dev/urandom). Unless you are absolutely
-sure of what you are doing, it is best to leave this alone.
+--with-prngd-socket=/some/file allows you to enable EGD or PRNGD
+support and to specify a PRNGd socket. Use this if your Unix lacks
+/dev/random and you don't want to use OpenSSH's builtin entropy
+collection support.
---with-egd-pool=/some/file allows you to enable EGD or PRNGD support
-and to specify a EGD pool socket. Use this if your Unix lacks
-/dev/random and you don't want to use OpenSSH's builtin entropy
+--with-prngd-port=portnum allows you to enable EGD or PRNGD support
+and to specify a EGD localhost TCP port. Use this if your Unix lacks
+/dev/random and you don't want to use OpenSSH's builtin entropy
collection support.
---with-lastlog=FILE will specify the location of the lastlog file.
+--with-lastlog=FILE will specify the location of the lastlog file.
./configure searches a few locations for lastlog, but may not find
it if lastlog is installed in a different place.
--without-lastlog will disable lastlog support entirely.
---with-kerberos4=PATH will enable Kerberos IV support. You will need
-to have the Kerberos libraries and header files installed for this
-to work. Use the optional PATH argument to specify the root of your
-Kerberos installation.
-
---with-afs=PATH will enable AFS support. You will need to have the
-Kerberos IV and the AFS libraries and header files installed for this
-to work. Use the optional PATH argument to specify the root of your
-AFS installation. AFS requires Kerberos support to be enabled.
+--with-osfsia, --without-osfsia will enable or disable OSF1's Security
+Integration Architecture. The default for OSF1 machines is enable.
---with-skey=PATH will enable S/Key one time password support. You will
+--with-skey=PATH will enable S/Key one time password support. You will
need the S/Key libraries and header files installed for this to work.
--with-tcp-wrappers will enable TCP Wrappers (/etc/hosts.allow|deny)
-support. You will need libwrap.a and tcpd.h installed.
+support.
--with-md5-passwords will enable the use of MD5 passwords. Enable this
-if your operating system uses MD5 passwords without using PAM.
+if your operating system uses MD5 passwords and the system crypt() does
+not support them directly (see the crypt(3/3c) man page). If enabled, the
+resulting binary will support both MD5 and traditional crypt passwords.
---with-utmpx enables utmpx support. utmpx support is automatic for
+--with-utmpx enables utmpx support. utmpx support is automatic for
some platforms.
--without-shadow disables shadow password support.
---with-ipaddr-display forces the use of a numeric IP address in the
+--with-ipaddr-display forces the use of a numeric IP address in the
$DISPLAY environment variable. Some broken systems need this.
--with-default-path=PATH allows you to specify a default $PATH for sessions
started by sshd. This replaces the standard path entirely.
---with-pid-dir=PATH specifies the directory in which the ssh.pid file is
+--with-pid-dir=PATH specifies the directory in which the sshd.pid file is
created.
--with-xauth=PATH specifies the location of the xauth binary
---with-ipv4-default instructs OpenSSH to use IPv4 by default for new
-connections. Normally OpenSSH will try attempt to lookup both IPv6 and
-IPv4 addresses. On Linux/glibc-2.1.2 this causes long delays in name
-resolution. If this option is specified, you can still attempt to
-connect to IPv6 addresses using the command line option '-6'.
-
--with-ssl-dir=DIR allows you to specify where your OpenSSL libraries
are installed.
+--with-ssl-engine enables OpenSSL's (hardware) ENGINE support
+
--with-4in6 Check for IPv4 in IPv6 mapped addresses and convert them to
real (AF_INET) IPv4 addresses. Works around some quirks on Linux.
+--with-opensc=DIR
+--with-sectok=DIR allows for OpenSC or sectok smartcard libraries to
+be used with OpenSSH. See 'README.smartcard' for more details.
+
If you need to pass special options to the compiler or linker, you
can specify these as environment variables before running ./configure.
For example:
3. Configuration
----------------
-The runtime configuration files are installed by in ${prefix}/etc or
+The runtime configuration files are installed by in ${prefix}/etc or
whatever you specified as your --sysconfdir (/usr/local/etc by default).
-The default configuration should be instantly usable, though you should
+The default configuration should be instantly usable, though you should
review it to ensure that it matches your security requirements.
To generate a host key, run "make host-key". Alternately you can do so
-manually using the following commands:
+manually using the following commands:
- ssh-keygen -b 1024 -f /etc/ssh/ssh_host_key -N ""
- ssh-keygen -d -f /etc/ssh/ssh_host_dsa_key -N ""
+ ssh-keygen -t rsa1 -f /etc/ssh/ssh_host_key -N ""
+ ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key -N ""
+ ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key -N ""
Replacing /etc/ssh with the correct path to the configuration directory.
-(${prefix}/etc or whatever you specified with --sysconfdir during
+(${prefix}/etc or whatever you specified with --sysconfdir during
configuration)
If you have configured OpenSSH with EGD support, ensure that EGD is
running and has collected some Entropy.
-For more information on configuration, please refer to the manual pages
+For more information on configuration, please refer to the manual pages
for sshd, ssh and ssh-agent.
-4. Problems?
+4. (Optional) Send survey
+-------------------------
+
+$ make survey
+[check the contents of the file "survey" to ensure there's no information
+that you consider sensitive]
+$ make send-survey
+
+This will send configuration information for the currently configured
+host to a survey address. This will help determine which configurations
+are actually in use, and what valid combinations of configure options
+exist. The raw data is available only to the OpenSSH developers, however
+summary data may be published.
+
+5. Problems?
------------
-If you experience problems compiling, installing or running OpenSSH.
+If you experience problems compiling, installing or running OpenSSH.
Please refer to the "reporting bugs" section of the webpage at
http://www.openssh.com/
andersk / openssh.git / blobdiff