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8bc7973f | 1 | 1. Prerequisites |
2 | ---------------- | |
3 | ||
4 | You will need working installations of Zlib and OpenSSL. | |
5 | ||
6 | Zlib: | |
7 | http://www.cdrom.com/pub/infozip/zlib/ | |
8 | ||
9 | OpenSSL: | |
10 | http://www.openssl.org/ | |
11 | ||
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. | |
14 | ||
15 | PAM: | |
16 | http://www.kernel.org/pub/linux/libs/pam/ | |
17 | ||
0bc5b6fb | 18 | Dante: |
19 | http://www.inet.no/dante | |
20 | ||
21 | OpenSSH can also use the Dante SOCKS libraries, version 1.1.1pre1 or higher, | |
22 | if you have them installed on your system. | |
23 | ||
1a317551 | 24 | If you wish to build the GNOME passphrase requester, you will need the GNOME |
8bc7973f | 25 | libraries and headers. |
26 | ||
27 | GNOME: | |
28 | http://www.gnome.org/ | |
29 | ||
1a317551 | 30 | Alternatly Jim Knoble <jmknoble@pobox.com> has written an excellent X11 |
31 | passphrase requester. This is maintained seperatly at: | |
32 | ||
33 | http://www.pobox.com/~jmknoble/jmk/ | |
34 | ||
35 | ||
8bc7973f | 36 | If you are planning to use OpenSSH on a Unix which lacks a Kernel random |
37 | number generator (/dev/urandom), you will need to install the Entropy | |
38 | Gathering Daemon (or similar). You will also need to specify the | |
39 | --with-egd-pool option to ./configure. | |
40 | ||
41 | EGD: | |
42 | http://www.lothar.com/tech/crypto/ | |
43 | ||
9c08d6ce | 44 | GNU Make: |
45 | ftp://ftp.gnu.org/gnu/make/ | |
46 | ||
47 | OpenSSH has only been tested with GNU make. It may work with other | |
48 | 'make' programs, but you are on your own. | |
8bc7973f | 49 | |
50 | 2. Building / Installation | |
51 | -------------------------- | |
52 | ||
53 | To install OpenSSH with default options: | |
54 | ||
55 | ./configure | |
56 | make | |
57 | make install | |
58 | ||
59 | This will install the OpenSSH binaries in /usr/local/bin, configuration files | |
60 | in /usr/local/etc, the server in /usr/local/sbin, etc. To specify a different | |
61 | installation prefix, use the --prefix option to configure: | |
62 | ||
63 | ./configure --prefix=/opt | |
64 | make | |
65 | make install | |
66 | ||
67 | Will install OpenSSH in /opt/{bin,etc,lib,sbin}. You can also override | |
68 | specific paths, for example: | |
69 | ||
70 | ./configure --prefix=/opt --sysconfdir=/etc/ssh | |
71 | make | |
72 | make install | |
73 | ||
74 | This will install the binaries in /opt/{bin,lib,sbin}, but will place the | |
75 | configuration files in /etc/ssh. | |
76 | ||
4655fe80 | 77 | If you are using PAM, you will need to manually install a PAM control |
78 | file as "/etc/pam.d/sshd" (or wherever your system prefers to keep | |
79 | them). A generic PAM configuration is included as "sshd.pam.generic", | |
9b363e1c | 80 | you may need to edit it before using it on your system. If you are |
81 | using a recent version of Redhat Linux, the config file in | |
82 | packages/redhat/sshd.pam should be more useful. | |
529c5440 | 83 | |
8bc7973f | 84 | There are a few other options to the configure script: |
85 | ||
0bc5b6fb | 86 | --with-rsh=PATH allows you to specify the path to your rsh program. |
87 | Normally ./configure will search the current $PATH for 'rsh'. You | |
88 | may need to specify this option if rsh is not in your path or has a | |
89 | different name. | |
90 | ||
91 | --without-pam will disable PAM support. PAM is automatically detected | |
92 | and switched on if found. | |
93 | ||
721c55f0 | 94 | --enable-gnome-askpass will build the GNOME passphrase dialog. You |
95 | need a working installation of GNOME, including the development | |
96 | headers, for this to work. | |
8bc7973f | 97 | |
721c55f0 | 98 | --with-random=/some/file allows you to specify an alternate source of |
99 | random numbers (the default is /dev/urandom). Unless you are absolutly | |
8bc7973f | 100 | sure of what you are doing, it is best to leave this alone. |
101 | ||
721c55f0 | 102 | --with-egd-pool=/some/file allows you to enable Entropy Gathering |
103 | Daemon support and to specify a EGD pool socket. You will need to | |
104 | use this if your Unix does not support the /dev/urandom device (or | |
60d804c8 | 105 | similar). The file argument refers to the EGD pool file, not the |
106 | EGD program itself. Please refer to the EGD documentation. | |
8bc7973f | 107 | |
0bc5b6fb | 108 | --with-lastlog=FILE will specify the location of the lastlog file. |
109 | ./configure searches a few locations for lastlog, but may not find | |
110 | it if lastlog is installed in a different place. | |
111 | ||
112 | --without-lastlog will disable lastlog support entirely. | |
113 | ||
dfb95100 | 114 | --with-kerberos4=PATH will enable Kerberos IV support. You will need |
115 | to have the Kerberos libraries and header files installed for this | |
116 | to work. Use the optional PATH argument to specify the root of your | |
117 | Kerberos installation. | |
118 | ||
119 | --with-afs=PATH will enable AFS support. You will need to have the | |
120 | Kerberos IV and the AFS libraries and header files installed for this | |
121 | to work. Use the optional PATH argument to specify the root of your | |
122 | AFS installation. AFS requires Kerberos support to be enabled. | |
721c55f0 | 123 | |
124 | --with-skey will enable S/Key one time password support. You will need | |
125 | the S/Key libraries and header files installed for this to work. | |
126 | ||
127 | --with-tcp-wrappers will enable TCP Wrappers (/etc/hosts.allow|deny) | |
128 | support. You will need libwrap.a and tcpd.h installed. | |
129 | ||
130 | --with-md5-passwords will enable the use of MD5 passwords. Enable this | |
131 | if your operating system uses MD5 passwords without using PAM. | |
045672f9 | 132 | |
0bc5b6fb | 133 | --with-utmpx enables utmpx support. utmpx support is automatic for |
134 | some platforms. | |
135 | ||
136 | --without-shadow disables shadow password support. | |
137 | ||
138 | --with-ipaddr-display forces the use of a numeric IP address in the | |
139 | $DISPLAY environment variable. Some broken systems need this. | |
140 | ||
141 | --with-default-path=PATH allows you to specify a default $PATH for sessions | |
142 | started by sshd. | |
143 | ||
47e45e44 | 144 | --with-pid-dir=PATH specifies the directory in which the ssh.pid file is |
145 | created. | |
146 | ||
147 | --with-xauth=PATH specifies the location of the xauth binary | |
148 | ||
0bc5b6fb | 149 | --with-dante[=DIR] will enable Dante SOCKS library support. If the Dante |
150 | libsocks library isn't installed in a library searched by the compiler, | |
151 | add the directory name as the option. | |
152 | ||
59e76f33 | 153 | --with-ipv4-default instructs OpenSSH to use IPv4 by default for new |
154 | connections. Normally OpenSSH will try attempt to lookup both IPv6 and | |
155 | IPv4 addresses. On Linux/glibc-2.1.2 this causes long delays in name | |
156 | resolution. If this option is specified, you can still attempt to | |
157 | connect to IPv6 addresses using the command line option '-6'. | |
158 | ||
d94aa2ae | 159 | If you need to pass special options to the compiler or linker, you |
160 | can specify these as enviornment variables before running ./configure. | |
161 | For example: | |
162 | ||
163 | CFLAGS="-O -m486" LFLAGS="-s" ./configure | |
8bc7973f | 164 | |
165 | 3. Configuration | |
166 | ---------------- | |
167 | ||
168 | The runtime configuration files are installed by in ${prefix}/etc or | |
169 | whatever you specified as your --sysconfdir (/usr/local/etc by default). | |
170 | ||
171 | The default configuration should be instantly usable, though you should | |
172 | review it to ensure that it matches your security requirements. | |
173 | ||
3e807d1e | 174 | To generate a host key, issue the following command: (replacing |
175 | /etc/ssh/ssh_host_key with an appropriate path) | |
176 | ||
177 | /usr/bin/ssh-keygen -b 1024 -f /etc/ssh/ssh_host_key -N '' | |
178 | ||
7303768f | 179 | Replacing /etc/ssh with the correct path to the configuration directory. |
180 | (${prefix}/etc or whatever you specified with --sysconfdir during | |
181 | configuration) | |
182 | ||
60d804c8 | 183 | If you have configured OpenSSH with EGD support, ensure that EGD is |
184 | running and has collected some Entropy. | |
185 | ||
8bc7973f | 186 | For more information on configuration, please refer to the manual pages |
187 | for sshd, ssh and ssh-agent. | |
188 | ||
7303768f | 189 | 4. Problems? |
190 | ------------ | |
191 | ||
192 | If you experience problems compiling, installing or running OpenSSH. | |
193 | Please refer to the "reporting bugs" section of the webpage at | |
194 | http://violet.ibs.com.au/openssh/ | |
195 |