4 You will need working installations of Zlib and OpenSSL.
7 http://www.cdrom.com/pub/infozip/zlib/
10 http://www.openssl.org/
12 OpenSSH can utilise Pluggable Authentication Modules (PAM) if your system
13 supports it. PAM is standard on Redhat and Debian Linux and on Solaris.
16 http://www.kernel.org/pub/linux/libs/pam/
19 http://www.inet.no/dante
21 OpenSSH can also use the Dante SOCKS libraries, version 1.1.1pre1 or higher,
22 if you have them installed on your system.
24 If you wish to build the GNOME passphrase requester, you will need the GNOME
25 libraries and headers.
30 Alternatively, Jim Knoble <jmknoble@pobox.com> has written an excellent X11
31 passphrase requester. This is maintained separately at:
33 http://www.ntrnet.net/~jmknoble/software/x11-ssh-askpass/index.html
35 If you are planning to use OpenSSH on a Unix which lacks a Kernel random
36 number generator (/dev/urandom), you will need to install the Entropy
37 Gathering Daemon (or similar). You will also need to specify the
38 --with-egd-pool option to ./configure.
41 http://www.lothar.com/tech/crypto/
44 ftp://ftp.gnu.org/gnu/make/
46 OpenSSH has only been tested with GNU make. It may work with other
47 'make' programs, but you are on your own.
49 2. Building / Installation
50 --------------------------
52 To install OpenSSH with default options:
58 This will install the OpenSSH binaries in /usr/local/bin, configuration files
59 in /usr/local/etc, the server in /usr/local/sbin, etc. To specify a different
60 installation prefix, use the --prefix option to configure:
62 ./configure --prefix=/opt
66 Will install OpenSSH in /opt/{bin,etc,lib,sbin}. You can also override
67 specific paths, for example:
69 ./configure --prefix=/opt --sysconfdir=/etc/ssh
73 This will install the binaries in /opt/{bin,lib,sbin}, but will place the
74 configuration files in /etc/ssh.
76 If you are using PAM, you will need to manually install a PAM control
77 file as "/etc/pam.d/sshd" (or wherever your system prefers to keep
78 them). A generic PAM configuration is included as "sshd.pam.generic",
79 you may need to edit it before using it on your system. If you are
80 using a recent version of Redhat Linux, the config file in
81 packages/redhat/sshd.pam should be more useful.
83 There are a few other options to the configure script:
85 --with-rsh=PATH allows you to specify the path to your rsh program.
86 Normally ./configure will search the current $PATH for 'rsh'. You
87 may need to specify this option if rsh is not in your path or has a
90 --without-pam will disable PAM support. PAM is automatically detected
91 and switched on if found.
93 --enable-gnome-askpass will build the GNOME passphrase dialog. You
94 need a working installation of GNOME, including the development
95 headers, for this to work.
97 --with-random=/some/file allows you to specify an alternate source of
98 random numbers (the default is /dev/urandom). Unless you are absolutly
99 sure of what you are doing, it is best to leave this alone.
101 --with-egd-pool=/some/file allows you to enable Entropy Gathering
102 Daemon support and to specify a EGD pool socket. You will need to
103 use this if your Unix does not support the /dev/urandom device (or
104 similar). The file argument refers to the EGD pool file, not the
105 EGD program itself. Please refer to the EGD documentation.
107 --with-lastlog=FILE will specify the location of the lastlog file.
108 ./configure searches a few locations for lastlog, but may not find
109 it if lastlog is installed in a different place.
111 --without-lastlog will disable lastlog support entirely.
113 --with-kerberos4=PATH will enable Kerberos IV support. You will need
114 to have the Kerberos libraries and header files installed for this
115 to work. Use the optional PATH argument to specify the root of your
116 Kerberos installation.
118 --with-afs=PATH will enable AFS support. You will need to have the
119 Kerberos IV and the AFS libraries and header files installed for this
120 to work. Use the optional PATH argument to specify the root of your
121 AFS installation. AFS requires Kerberos support to be enabled.
123 --with-skey will enable S/Key one time password support. You will need
124 the S/Key libraries and header files installed for this to work.
126 --with-tcp-wrappers will enable TCP Wrappers (/etc/hosts.allow|deny)
127 support. You will need libwrap.a and tcpd.h installed.
129 --with-md5-passwords will enable the use of MD5 passwords. Enable this
130 if your operating system uses MD5 passwords without using PAM.
132 --with-utmpx enables utmpx support. utmpx support is automatic for
135 --without-shadow disables shadow password support.
137 --with-ipaddr-display forces the use of a numeric IP address in the
138 $DISPLAY environment variable. Some broken systems need this.
140 --with-default-path=PATH allows you to specify a default $PATH for sessions
143 --with-pid-dir=PATH specifies the directory in which the ssh.pid file is
146 --with-xauth=PATH specifies the location of the xauth binary
148 --with-dante[=DIR] will enable Dante SOCKS library support. If the Dante
149 libsocks library isn't installed in a library searched by the compiler,
150 add the directory name as the option.
152 --with-ipv4-default instructs OpenSSH to use IPv4 by default for new
153 connections. Normally OpenSSH will try attempt to lookup both IPv6 and
154 IPv4 addresses. On Linux/glibc-2.1.2 this causes long delays in name
155 resolution. If this option is specified, you can still attempt to
156 connect to IPv6 addresses using the command line option '-6'.
158 --with-ssl-dir=DIR allows you to specify where your OpenSSL libraries
161 If you need to pass special options to the compiler or linker, you
162 can specify these as enviornment variables before running ./configure.
165 CFLAGS="-O -m486" LFLAGS="-s" ./configure
170 The runtime configuration files are installed by in ${prefix}/etc or
171 whatever you specified as your --sysconfdir (/usr/local/etc by default).
173 The default configuration should be instantly usable, though you should
174 review it to ensure that it matches your security requirements.
176 To generate a host key, run "make host-key". Alternately you can do so
177 manually using the following command:
179 /usr/bin/ssh-keygen -b 1024 -f /etc/ssh/ssh_host_key -N ''
181 Replacing /etc/ssh with the correct path to the configuration directory.
182 (${prefix}/etc or whatever you specified with --sysconfdir during
185 If you have configured OpenSSH with EGD support, ensure that EGD is
186 running and has collected some Entropy.
188 For more information on configuration, please refer to the manual pages
189 for sshd, ssh and ssh-agent.
194 If you experience problems compiling, installing or running OpenSSH.
195 Please refer to the "reporting bugs" section of the webpage at
196 http://violet.ibs.com.au/openssh/