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145 lines
4.6 KiB
Plaintext
145 lines
4.6 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.cdrom.com/pub/infozip/zlib/
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OpenSSL:
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http://www.openssl.org/
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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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Alternatly Jim Knoble <jmknoble@pobox.com> has written an excellent X11
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passphrase requester. This is maintained seperatly at:
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http://www.pobox.com/~jmknoble/jmk/
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If you are planning to use OpenSSH on a Unix which lacks a Kernel random
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number generator (/dev/urandom), you will need to install the Entropy
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Gathering Daemon (or similar). You will also need to specify the
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--with-egd-pool option to ./configure.
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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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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 control
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file as "/etc/pam.d/sshd" (or wherever your system prefers to keep
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them). A generic PAM configuration is included as "sshd.pam.generic",
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you may need to edit it before using it on your system.
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There are a few other options to the configure script:
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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 absolutly
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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. You will need to
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use this if your Unix does not support the /dev/urandom device (or
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similar). The file argument refers to the EGD pool file, not the
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EGD program itself. Please refer to the EGD documentation.
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--with-kerberos4 will enable Kerberos IV support. You will need to
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have the Kerberos libraries and header files installed for this to
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work.
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--with-afs will enable AFS support. You will need to have the Kerberos
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IV and the AFS libraries and header files installed for this to work.
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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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If you need to pass special options to the compiler or linker, you
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can specify these as enviornment variables before running ./configure.
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For example:
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CFLAGS="-O -m486" LFLAGS="-s" ./configure
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3. Configuration
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----------------
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The runtime configuration files are installed by in ${prefix}/etc or
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whatever you specified as your --sysconfdir (/usr/local/etc by default).
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The default configuration should be instantly usable, though you should
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review it to ensure that it matches your security requirements.
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To generate a host key, issue the following command: (replacing
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/etc/ssh/ssh_host_key with an appropriate path)
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/usr/bin/ssh-keygen -b 1024 -f /etc/ssh/ssh_host_key -N ''
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Replacing /etc/ssh with the correct path to the configuration directory.
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(${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://violet.ibs.com.au/openssh/
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