mirror of git://anongit.mindrot.org/openssh.git
200 lines
6.9 KiB
Plaintext
200 lines
6.9 KiB
Plaintext
1. Prerequisites
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----------------
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You will need working installations of Zlib and OpenSSL.
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Zlib:
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http://www.freesoftware.com/pub/infozip/zlib/
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OpenSSL 0.9.5a or greater:
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http://www.openssl.org/
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RPMs of OpenSSL are available at http://violet.ibs.com.au/openssh/files/support
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OpenSSH can utilise Pluggable Authentication Modules (PAM) if your system
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supports it. PAM is standard on Redhat and Debian Linux and on Solaris.
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PAM:
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http://www.kernel.org/pub/linux/libs/pam/
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If you wish to build the GNOME passphrase requester, you will need the GNOME
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libraries and headers.
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GNOME:
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http://www.gnome.org/
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Alternatively, Jim Knoble <jmknoble@pobox.com> has written an excellent X11
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passphrase requester. This is maintained separately at:
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http://www.ntrnet.net/~jmknoble/software/x11-ssh-askpass/index.html
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The Entropy Gathering Daemon (EGD) is supported if you have a system which
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lacks /dev/random and don't want to use OpenSSH's internal entropy collection.
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EGD:
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http://www.lothar.com/tech/crypto/
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GNU Make:
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ftp://ftp.gnu.org/gnu/make/
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OpenSSH has only been tested with GNU make. It may work with other
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'make' programs, but you are on your own.
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pcre (POSIX Regular Expression library):
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ftp://ftp.cus.cam.ac.uk/pub/software/programs/pcre/
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Most platforms do not required this. However older 4.3 BSD do not
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have a posix regex library.
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2. Building / Installation
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--------------------------
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To install OpenSSH with default options:
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./configure
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make
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make install
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This will install the OpenSSH binaries in /usr/local/bin, configuration files
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in /usr/local/etc, the server in /usr/local/sbin, etc. To specify a different
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installation prefix, use the --prefix option to configure:
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./configure --prefix=/opt
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make
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make install
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Will install OpenSSH in /opt/{bin,etc,lib,sbin}. You can also override
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specific paths, for example:
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./configure --prefix=/opt --sysconfdir=/etc/ssh
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make
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make install
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This will install the binaries in /opt/{bin,lib,sbin}, but will place the
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configuration files in /etc/ssh.
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If you are using PAM, you will need to manually install a PAM
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control file as "/etc/pam.d/sshd" (or wherever your system
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prefers to keep them). A generic PAM configuration is included as
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"contrib/sshd.pam.generic", you may need to edit it before using it on
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your system. If you are using a recent version of Redhat Linux, the
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config file in contrib/redhat/sshd.pam should be more useful.
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Failure to install a valid PAM file may result in an inability to
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use password authentication.
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There are a few other options to the configure script:
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--with-rsh=PATH allows you to specify the path to your rsh program.
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Normally ./configure will search the current $PATH for 'rsh'. You
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may need to specify this option if rsh is not in your path or has a
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different name.
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--without-pam will disable PAM support. PAM is automatically detected
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and switched on if found.
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--enable-gnome-askpass will build the GNOME passphrase dialog. You
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need a working installation of GNOME, including the development
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headers, for this to work.
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--with-random=/some/file allows you to specify an alternate source of
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random numbers (the default is /dev/urandom). Unless you are absolutely
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sure of what you are doing, it is best to leave this alone.
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--with-egd-pool=/some/file allows you to enable Entropy Gathering
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Daemon support and to specify a EGD pool socket. Use this if your
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Unix lacks /dev/random and you don't want to use OpenSSH's builtin
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entropy collection support.
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--with-lastlog=FILE will specify the location of the lastlog file.
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./configure searches a few locations for lastlog, but may not find
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it if lastlog is installed in a different place.
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--without-lastlog will disable lastlog support entirely.
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--with-kerberos4=PATH will enable Kerberos IV support. You will need
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to have the Kerberos libraries and header files installed for this
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to work. Use the optional PATH argument to specify the root of your
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Kerberos installation.
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--with-afs=PATH will enable AFS support. You will need to have the
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Kerberos IV and the AFS libraries and header files installed for this
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to work. Use the optional PATH argument to specify the root of your
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AFS installation. AFS requires Kerberos support to be enabled.
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--with-skey will enable S/Key one time password support. You will need
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the S/Key libraries and header files installed for this to work.
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--with-tcp-wrappers will enable TCP Wrappers (/etc/hosts.allow|deny)
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support. You will need libwrap.a and tcpd.h installed.
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--with-md5-passwords will enable the use of MD5 passwords. Enable this
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if your operating system uses MD5 passwords without using PAM.
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--with-utmpx enables utmpx support. utmpx support is automatic for
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some platforms.
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--without-shadow disables shadow password support.
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--with-ipaddr-display forces the use of a numeric IP address in the
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$DISPLAY environment variable. Some broken systems need this.
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--with-default-path=PATH allows you to specify a default $PATH for sessions
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started by sshd. This replaces the standard path entirely.
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--with-pid-dir=PATH specifies the directory in which the ssh.pid file is
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created.
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--with-xauth=PATH specifies the location of the xauth binary
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--with-ipv4-default instructs OpenSSH to use IPv4 by default for new
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connections. Normally OpenSSH will try attempt to lookup both IPv6 and
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IPv4 addresses. On Linux/glibc-2.1.2 this causes long delays in name
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resolution. If this option is specified, you can still attempt to
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connect to IPv6 addresses using the command line option '-6'.
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--with-ssl-dir=DIR allows you to specify where your OpenSSL libraries
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are installed.
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--with-4in6 Check for IPv4 in IPv6 mapped addresses and convert them to
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real (AF_INET) IPv4 addresses. Works around some quirks on Linux.
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If you need to pass special options to the compiler or linker, you
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can specify these as environment variables before running ./configure.
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For example:
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CFLAGS="-O -m486" LDFLAGS="-s" LIBS="-lrubbish" LD="/usr/foo/ld" ./configure
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3. Configuration
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----------------
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The runtime configuration files are installed by in ${prefix}/etc or
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whatever you specified as your --sysconfdir (/usr/local/etc by default).
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The default configuration should be instantly usable, though you should
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review it to ensure that it matches your security requirements.
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To generate a host key, run "make host-key". Alternately you can do so
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manually using the following commands:
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ssh-keygen -b 1024 -f /etc/ssh/ssh_host_key -N ""
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ssh-keygen -d -f /etc/ssh/ssh_host_dsa_key -N ""
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Replacing /etc/ssh with the correct path to the configuration directory.
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(${prefix}/etc or whatever you specified with --sysconfdir during
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configuration)
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If you have configured OpenSSH with EGD support, ensure that EGD is
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running and has collected some Entropy.
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For more information on configuration, please refer to the manual pages
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for sshd, ssh and ssh-agent.
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4. Problems?
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------------
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If you experience problems compiling, installing or running OpenSSH.
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Please refer to the "reporting bugs" section of the webpage at
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http://www.openssh.com/
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