4 You will need working installations of Zlib and OpenSSL.
7 http://www.cdrom.com/pub/infozip/zlib/
9 OpenSSL 0.9.5a or greater:
10 http://www.openssl.org/
12 RPMs of OpenSSL are available in the support/ directory of the OpenSSH
13 mirror site. OpenSSH requires OpenSSL version 0.9.5 or later.
15 OpenSSH can utilise Pluggable Authentication Modules (PAM) if your system
16 supports it. PAM is standard on Redhat and Debian Linux and on Solaris.
19 http://www.kernel.org/pub/linux/libs/pam/
21 If you wish to build the GNOME passphrase requester, you will need the GNOME
22 libraries and headers.
27 Alternatively, Jim Knoble <jmknoble@pobox.com> has written an excellent X11
28 passphrase requester. This is maintained separately at:
30 http://www.ntrnet.net/~jmknoble/software/x11-ssh-askpass/index.html
32 The Entropy Gathering Daemon (EGD) is supported if you have a system which
33 lacks /dev/random and don't want to use OpenSSH's internal entropy collection.
36 http://www.lothar.com/tech/crypto/
39 ftp://ftp.gnu.org/gnu/make/
41 OpenSSH has only been tested with GNU make. It may work with other
42 'make' programs, but you are on your own.
44 2. Building / Installation
45 --------------------------
47 To install OpenSSH with default options:
53 This will install the OpenSSH binaries in /usr/local/bin, configuration files
54 in /usr/local/etc, the server in /usr/local/sbin, etc. To specify a different
55 installation prefix, use the --prefix option to configure:
57 ./configure --prefix=/opt
61 Will install OpenSSH in /opt/{bin,etc,lib,sbin}. You can also override
62 specific paths, for example:
64 ./configure --prefix=/opt --sysconfdir=/etc/ssh
68 This will install the binaries in /opt/{bin,lib,sbin}, but will place the
69 configuration files in /etc/ssh.
71 If you are using PAM, you will need to manually install a PAM
72 control file as "/etc/pam.d/sshd" (or wherever your system
73 prefers to keep them). A generic PAM configuration is included as
74 "contrib/sshd.pam.generic", you may need to edit it before using it on
75 your system. If you are using a recent version of Redhat Linux, the
76 config file in contrib/redhat/sshd.pam should be more useful.
78 There are a few other options to the configure script:
80 --with-rsh=PATH allows you to specify the path to your rsh program.
81 Normally ./configure will search the current $PATH for 'rsh'. You
82 may need to specify this option if rsh is not in your path or has a
85 --without-pam will disable PAM support. PAM is automatically detected
86 and switched on if found.
88 --enable-gnome-askpass will build the GNOME passphrase dialog. You
89 need a working installation of GNOME, including the development
90 headers, for this to work.
92 --with-random=/some/file allows you to specify an alternate source of
93 random numbers (the default is /dev/urandom). Unless you are absolutly
94 sure of what you are doing, it is best to leave this alone.
96 --with-egd-pool=/some/file allows you to enable Entropy Gathering
97 Daemon support and to specify a EGD pool socket. Use this if your
98 Unix lacks /dev/random and you don't want to use OpenSSH's builtin
99 entropy collection support.
101 --with-lastlog=FILE will specify the location of the lastlog file.
102 ./configure searches a few locations for lastlog, but may not find
103 it if lastlog is installed in a different place.
105 --without-lastlog will disable lastlog support entirely.
107 --with-kerberos4=PATH will enable Kerberos IV support. You will need
108 to have the Kerberos libraries and header files installed for this
109 to work. Use the optional PATH argument to specify the root of your
110 Kerberos installation.
112 --with-afs=PATH will enable AFS support. You will need to have the
113 Kerberos IV and the AFS libraries and header files installed for this
114 to work. Use the optional PATH argument to specify the root of your
115 AFS installation. AFS requires Kerberos support to be enabled.
117 --with-skey will enable S/Key one time password support. You will need
118 the S/Key libraries and header files installed for this to work.
120 --with-tcp-wrappers will enable TCP Wrappers (/etc/hosts.allow|deny)
121 support. You will need libwrap.a and tcpd.h installed.
123 --with-md5-passwords will enable the use of MD5 passwords. Enable this
124 if your operating system uses MD5 passwords without using PAM.
126 --with-utmpx enables utmpx support. utmpx support is automatic for
129 --without-shadow disables shadow password support.
131 --with-ipaddr-display forces the use of a numeric IP address in the
132 $DISPLAY environment variable. Some broken systems need this.
134 --with-default-path=PATH allows you to specify a default $PATH for sessions
135 started by sshd. This replaces the standard path entirely.
137 --with-pid-dir=PATH specifies the directory in which the ssh.pid file is
140 --with-xauth=PATH specifies the location of the xauth binary
142 --with-ipv4-default instructs OpenSSH to use IPv4 by default for new
143 connections. Normally OpenSSH will try attempt to lookup both IPv6 and
144 IPv4 addresses. On Linux/glibc-2.1.2 this causes long delays in name
145 resolution. If this option is specified, you can still attempt to
146 connect to IPv6 addresses using the command line option '-6'.
148 --with-ssl-dir=DIR allows you to specify where your OpenSSL libraries
151 --with-4in6 Check for IPv4 in IPv6 mapped addresses and convert them to
152 real (AF_INET) IPv4 addresses. Works around some quirks on Linux.
154 If you need to pass special options to the compiler or linker, you
155 can specify these as enviornment variables before running ./configure.
158 CFLAGS="-O -m486" LFLAGS="-s" LIBS="-lrubbish" LD="/usr/foo/ld" ./configure
163 The runtime configuration files are installed by in ${prefix}/etc or
164 whatever you specified as your --sysconfdir (/usr/local/etc by default).
166 The default configuration should be instantly usable, though you should
167 review it to ensure that it matches your security requirements.
169 To generate a host key, run "make host-key". Alternately you can do so
170 manually using the following command:
172 /usr/bin/ssh-keygen -b 1024 -f /etc/ssh/ssh_host_key -N ''
174 Replacing /etc/ssh with the correct path to the configuration directory.
175 (${prefix}/etc or whatever you specified with --sysconfdir during
178 If you have configured OpenSSH with EGD support, ensure that EGD is
179 running and has collected some Entropy.
181 For more information on configuration, please refer to the manual pages
182 for sshd, ssh and ssh-agent.
187 If you experience problems compiling, installing or running OpenSSH.
188 Please refer to the "reporting bugs" section of the webpage at
189 http://violet.ibs.com.au/openssh/