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8bc7973f | 1 | 1. Prerequisites |
2 | ---------------- | |
3 | ||
4 | You will need working installations of Zlib and OpenSSL. | |
5 | ||
5c7fc85d | 6 | Zlib 1.1.4 or 1.2.1.2 or greater (ealier 1.2.x versions have problems): |
aff51935 | 7 | http://www.gzip.org/zlib/ |
8bc7973f | 8 | |
4ca33cc5 | 9 | OpenSSL 0.9.6 or greater: |
8bc7973f | 10 | http://www.openssl.org/ |
11 | ||
aff51935 | 12 | (OpenSSL 0.9.5a is partially supported, but some ciphers (SSH protocol 1 |
d40af5fa | 13 | Blowfish) do not work correctly.) |
c323ac76 | 14 | |
8bc7973f | 15 | OpenSSH can utilise Pluggable Authentication Modules (PAM) if your system |
ca86bb3f | 16 | supports it. PAM is standard on Redhat and Debian Linux, Solaris and |
17 | HP-UX 11. | |
8bc7973f | 18 | |
aff51935 | 19 | NB. If you operating system supports /dev/random, you should configure |
20 | OpenSSL to use it. OpenSSH relies on OpenSSL's direct support of | |
21 | /dev/random. If you don't you will have to rely on ssh-rand-helper, which | |
230c7a8f | 22 | is inferior to a good kernel-based solution. |
23 | ||
8bc7973f | 24 | PAM: |
25 | http://www.kernel.org/pub/linux/libs/pam/ | |
26 | ||
1a317551 | 27 | If you wish to build the GNOME passphrase requester, you will need the GNOME |
8bc7973f | 28 | libraries and headers. |
29 | ||
30 | GNOME: | |
31 | http://www.gnome.org/ | |
32 | ||
f2422cee | 33 | Alternatively, Jim Knoble <jmknoble@pobox.com> has written an excellent X11 |
ff8ecdb8 | 34 | passphrase requester. This is maintained separately at: |
1a317551 | 35 | |
fd79af78 | 36 | http://www.jmknoble.net/software/x11-ssh-askpass/ |
1a317551 | 37 | |
e1dd3a7a | 38 | PRNGD: |
39 | ||
aff51935 | 40 | If your system lacks Kernel based random collection, the use of Lutz |
e1dd3a7a | 41 | Jaenicke's PRNGd is recommended. |
42 | ||
43 | http://www.aet.tu-cottbus.de/personen/jaenicke/postfix_tls/prngd.html | |
44 | ||
45 | EGD: | |
46 | ||
e93ee87a | 47 | The Entropy Gathering Daemon (EGD) is supported if you have a system which |
48 | lacks /dev/random and don't want to use OpenSSH's internal entropy collection. | |
8bc7973f | 49 | |
8bc7973f | 50 | http://www.lothar.com/tech/crypto/ |
51 | ||
3e366738 | 52 | S/Key Libraries: |
07f804af | 53 | |
f2637973 | 54 | If you wish to use --with-skey then you will need the library below |
55 | installed. No other S/Key library is currently known to be supported. | |
07f804af | 56 | |
3e366738 | 57 | http://www.sparc.spb.su/solaris/skey/ |
58 | ||
59031773 | 59 | LibEdit: |
e02505e2 | 60 | |
61 | sftp supports command-line editing via NetBSD's libedit. If your platform | |
62 | has it available natively you can use that, alternatively you might try | |
63 | these multi-platform ports: | |
07f804af | 64 | |
59031773 | 65 | http://www.thrysoee.dk/editline/ |
66 | http://sourceforge.net/projects/libedit/ | |
67 | ||
8bc7973f | 68 | 2. Building / Installation |
69 | -------------------------- | |
70 | ||
71 | To install OpenSSH with default options: | |
72 | ||
73 | ./configure | |
74 | make | |
75 | make install | |
76 | ||
77 | This will install the OpenSSH binaries in /usr/local/bin, configuration files | |
78 | in /usr/local/etc, the server in /usr/local/sbin, etc. To specify a different | |
79 | installation prefix, use the --prefix option to configure: | |
80 | ||
81 | ./configure --prefix=/opt | |
82 | make | |
83 | make install | |
84 | ||
aff51935 | 85 | Will install OpenSSH in /opt/{bin,etc,lib,sbin}. You can also override |
8bc7973f | 86 | specific paths, for example: |
87 | ||
88 | ./configure --prefix=/opt --sysconfdir=/etc/ssh | |
89 | make | |
90 | make install | |
91 | ||
92 | This will install the binaries in /opt/{bin,lib,sbin}, but will place the | |
93 | configuration files in /etc/ssh. | |
94 | ||
ad6a7661 | 95 | If you are using Privilege Separation (which is enabled by default) |
96 | then you will also need to create the user, group and directory used by | |
97 | sshd for privilege separation. See README.privsep for details. | |
98 | ||
4b28be2c | 99 | If you are using PAM, you may need to manually install a PAM control |
100 | file as "/etc/pam.d/sshd" (or wherever your system prefers to keep | |
101 | them). Note that the service name used to start PAM is __progname, | |
102 | which is the basename of the path of your sshd (e.g., the service name | |
103 | for /usr/sbin/osshd will be osshd). If you have renamed your sshd | |
104 | executable, your PAM configuration may need to be modified. | |
105 | ||
106 | A generic PAM configuration is included as "contrib/sshd.pam.generic", | |
107 | you may need to edit it before using it on your system. If you are | |
108 | using a recent version of Red Hat Linux, the config file in | |
109 | contrib/redhat/sshd.pam should be more useful. Failure to install a | |
110 | valid PAM file may result in an inability to use password | |
111 | authentication. On HP-UX 11 and Solaris, the standard /etc/pam.conf | |
112 | configuration will work with sshd (sshd will match the other service | |
ca86bb3f | 113 | name). |
529c5440 | 114 | |
8bc7973f | 115 | There are a few other options to the configure script: |
116 | ||
0a23d79f | 117 | --with-pam enables PAM support. If PAM support is compiled in, it must |
118 | also be enabled in sshd_config (refer to the UsePAM directive). | |
8bc7973f | 119 | |
aff51935 | 120 | --with-prngd-socket=/some/file allows you to enable EGD or PRNGD |
121 | support and to specify a PRNGd socket. Use this if your Unix lacks | |
122 | /dev/random and you don't want to use OpenSSH's builtin entropy | |
9bdd5929 | 123 | collection support. |
124 | ||
aff51935 | 125 | --with-prngd-port=portnum allows you to enable EGD or PRNGD support |
126 | and to specify a EGD localhost TCP port. Use this if your Unix lacks | |
127 | /dev/random and you don't want to use OpenSSH's builtin entropy | |
e1dd3a7a | 128 | collection support. |
8bc7973f | 129 | |
aff51935 | 130 | --with-lastlog=FILE will specify the location of the lastlog file. |
0bc5b6fb | 131 | ./configure searches a few locations for lastlog, but may not find |
132 | it if lastlog is installed in a different place. | |
133 | ||
134 | --without-lastlog will disable lastlog support entirely. | |
135 | ||
aff51935 | 136 | --with-osfsia, --without-osfsia will enable or disable OSF1's Security |
99c8ddac | 137 | Integration Architecture. The default for OSF1 machines is enable. |
138 | ||
aff51935 | 139 | --with-skey=PATH will enable S/Key one time password support. You will |
3e366738 | 140 | need the S/Key libraries and header files installed for this to work. |
721c55f0 | 141 | |
142 | --with-tcp-wrappers will enable TCP Wrappers (/etc/hosts.allow|deny) | |
143 | support. You will need libwrap.a and tcpd.h installed. | |
144 | ||
145 | --with-md5-passwords will enable the use of MD5 passwords. Enable this | |
f8ec2373 | 146 | if your operating system uses MD5 passwords and the system crypt() does |
147 | not support them directly (see the crypt(3/3c) man page). If enabled, the | |
148 | resulting binary will support both MD5 and traditional crypt passwords. | |
045672f9 | 149 | |
aff51935 | 150 | --with-utmpx enables utmpx support. utmpx support is automatic for |
0bc5b6fb | 151 | some platforms. |
152 | ||
153 | --without-shadow disables shadow password support. | |
154 | ||
aff51935 | 155 | --with-ipaddr-display forces the use of a numeric IP address in the |
0bc5b6fb | 156 | $DISPLAY environment variable. Some broken systems need this. |
157 | ||
158 | --with-default-path=PATH allows you to specify a default $PATH for sessions | |
bd499f9e | 159 | started by sshd. This replaces the standard path entirely. |
0bc5b6fb | 160 | |
47e45e44 | 161 | --with-pid-dir=PATH specifies the directory in which the ssh.pid file is |
162 | created. | |
163 | ||
164 | --with-xauth=PATH specifies the location of the xauth binary | |
165 | ||
d581b7ae | 166 | --with-ssl-dir=DIR allows you to specify where your OpenSSL libraries |
167 | are installed. | |
168 | ||
c7ad0d99 | 169 | --with-ssl-engine enables OpenSSL's (hardware) ENGINE support |
170 | ||
b7a9ce47 | 171 | --with-4in6 Check for IPv4 in IPv6 mapped addresses and convert them to |
172 | real (AF_INET) IPv4 addresses. Works around some quirks on Linux. | |
173 | ||
295c8801 | 174 | --with-opensc=DIR |
175 | --with-sectok=DIR allows for OpenSC or sectok smartcard libraries to | |
176 | be used with OpenSSH. See 'README.smartcard' for more details. | |
177 | ||
d94aa2ae | 178 | If you need to pass special options to the compiler or linker, you |
c04f75f1 | 179 | can specify these as environment variables before running ./configure. |
d94aa2ae | 180 | For example: |
181 | ||
b817711d | 182 | CFLAGS="-O -m486" LDFLAGS="-s" LIBS="-lrubbish" LD="/usr/foo/ld" ./configure |
8bc7973f | 183 | |
184 | 3. Configuration | |
185 | ---------------- | |
186 | ||
aff51935 | 187 | The runtime configuration files are installed by in ${prefix}/etc or |
8bc7973f | 188 | whatever you specified as your --sysconfdir (/usr/local/etc by default). |
189 | ||
aff51935 | 190 | The default configuration should be instantly usable, though you should |
8bc7973f | 191 | review it to ensure that it matches your security requirements. |
192 | ||
6bf4d066 | 193 | To generate a host key, run "make host-key". Alternately you can do so |
aff51935 | 194 | manually using the following commands: |
3e807d1e | 195 | |
af8fda37 | 196 | ssh-keygen -t rsa1 -f /etc/ssh/ssh_host_key -N "" |
197 | ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key -N "" | |
198 | ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key -N "" | |
3e807d1e | 199 | |
7303768f | 200 | Replacing /etc/ssh with the correct path to the configuration directory. |
aff51935 | 201 | (${prefix}/etc or whatever you specified with --sysconfdir during |
7303768f | 202 | configuration) |
203 | ||
60d804c8 | 204 | If you have configured OpenSSH with EGD support, ensure that EGD is |
205 | running and has collected some Entropy. | |
206 | ||
aff51935 | 207 | For more information on configuration, please refer to the manual pages |
8bc7973f | 208 | for sshd, ssh and ssh-agent. |
209 | ||
d7cfdd7c | 210 | 4. (Optional) Send survey |
211 | ------------------------- | |
212 | ||
213 | $ make survey | |
e02505e2 | 214 | [check the contents of the file "survey" to ensure there's no information |
215 | that you consider sensitive] | |
d7cfdd7c | 216 | $ make send-survey |
217 | ||
218 | This will send configuration information for the currently configured | |
219 | host to a survey address. This will help determine which configurations | |
220 | are actually in use, and what valid combinations of configure options | |
221 | exist. The raw data is available only to the OpenSSH developers, however | |
222 | summary data may be published. | |
223 | ||
224 | 5. Problems? | |
7303768f | 225 | ------------ |
226 | ||
aff51935 | 227 | If you experience problems compiling, installing or running OpenSSH. |
7303768f | 228 | Please refer to the "reporting bugs" section of the webpage at |
c04f75f1 | 229 | http://www.openssh.com/ |
7303768f | 230 | |
0b202697 | 231 | |
232 | $Id$ |