| 1. Prerequisites |
| ---------------- |
| |
| You will need working installations of Zlib and OpenSSL. |
| |
| Zlib: |
| http://www.cdrom.com/pub/infozip/zlib/ |
| |
| OpenSSL: |
| http://www.openssl.org/ |
| |
| OpenSSH can utilise Pluggable Authentication Modules (PAM) if your system |
| supports it. PAM is standard on Redhat and Debian Linux and on Solaris. |
| |
| PAM: |
| http://www.kernel.org/pub/linux/libs/pam/ |
| |
| Dante: |
| http://www.inet.no/dante |
| |
| OpenSSH can also use the Dante SOCKS libraries, version 1.1.1pre1 or higher, |
| if you have them installed on your system. |
| |
| If you wish to build the GNOME passphrase requester, you will need the GNOME |
| libraries and headers. |
| |
| GNOME: |
| http://www.gnome.org/ |
| |
| Alternatly Jim Knoble <jmknoble@pobox.com> has written an excellent X11 |
| passphrase requester. This is maintained seperatly at: |
| |
| http://www.pobox.com/~jmknoble/jmk/ |
| |
| |
| If you are planning to use OpenSSH on a Unix which lacks a Kernel random |
| number generator (/dev/urandom), you will need to install the Entropy |
| Gathering Daemon (or similar). You will also need to specify the |
| --with-egd-pool option to ./configure. |
| |
| EGD: |
| http://www.lothar.com/tech/crypto/ |
| |
| GNU Make: |
| ftp://ftp.gnu.org/gnu/make/ |
| |
| OpenSSH has only been tested with GNU make. It may work with other |
| 'make' programs, but you are on your own. |
| |
| 2. Building / Installation |
| -------------------------- |
| |
| To install OpenSSH with default options: |
| |
| ./configure |
| make |
| make install |
| |
| This will install the OpenSSH binaries in /usr/local/bin, configuration files |
| in /usr/local/etc, the server in /usr/local/sbin, etc. To specify a different |
| installation prefix, use the --prefix option to configure: |
| |
| ./configure --prefix=/opt |
| make |
| make install |
| |
| Will install OpenSSH in /opt/{bin,etc,lib,sbin}. You can also override |
| specific paths, for example: |
| |
| ./configure --prefix=/opt --sysconfdir=/etc/ssh |
| make |
| make install |
| |
| 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 will 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 "sshd.pam.generic", |
| you may need to edit it before using it on your system. |
| |
| 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. |
| |
| --without-pam will disable PAM support. PAM is automatically detected |
| and switched on if found. |
| |
| --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 absolutly |
| sure of what you are doing, it is best to leave this alone. |
| |
| --with-egd-pool=/some/file allows you to enable Entropy Gathering |
| Daemon support and to specify a EGD pool socket. You will need to |
| use this if your Unix does not support the /dev/urandom device (or |
| similar). The file argument refers to the EGD pool file, not the |
| EGD program itself. Please refer to the EGD documentation. |
| |
| --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-skey 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. |
| |
| --with-md5-passwords will enable the use of MD5 passwords. Enable this |
| if your operating system uses MD5 passwords without using PAM. |
| |
| --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 |
| $DISPLAY environment variable. Some broken systems need this. |
| |
| --with-default-path=PATH allows you to specify a default $PATH for sessions |
| started by sshd. |
| |
| --with-dante[=DIR] will enable Dante SOCKS library support. If the Dante |
| libsocks library isn't installed in a library searched by the compiler, |
| add the directory name as the option. |
| |
| If you need to pass special options to the compiler or linker, you |
| can specify these as enviornment variables before running ./configure. |
| For example: |
| |
| CFLAGS="-O -m486" LFLAGS="-s" ./configure |
| |
| 3. Configuration |
| ---------------- |
| |
| The runtime configuration files are installed by in ${prefix}/etc or |
| whatever you specified as your --sysconfdir (/usr/local/etc by default). |
| |
| The default configuration should be instantly usable, though you should |
| review it to ensure that it matches your security requirements. |
| |
| To generate a host key, issue the following command: (replacing |
| /etc/ssh/ssh_host_key with an appropriate path) |
| |
| /usr/bin/ssh-keygen -b 1024 -f /etc/ssh/ssh_host_key -N '' |
| |
| Replacing /etc/ssh with the correct path to the configuration directory. |
| (${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 sshd, ssh and ssh-agent. |
| |
| 4. Problems? |
| ------------ |
| |
| If you experience problems compiling, installing or running OpenSSH. |
| Please refer to the "reporting bugs" section of the webpage at |
| http://violet.ibs.com.au/openssh/ |
| |