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8bc7973f | 1 | 1. Prerequisites |
2 | ---------------- | |
3 | ||
4 | You will need working installations of Zlib and OpenSSL. | |
5 | ||
6 | Zlib: | |
7af3215a | 7 | http://www.gzip.org/zlib/ |
8bc7973f | 8 | |
4ca33cc5 | 9 | OpenSSL 0.9.6 or greater: |
8bc7973f | 10 | http://www.openssl.org/ |
11 | ||
1a5d1467 | 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 | |
230c7a8f | 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 | |
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 | ||
986a22ec | 33 | Alternatively, Jim Knoble <jmknoble@jmknoble.cx> has written an excellent X11 |
ff8ecdb8 | 34 | passphrase requester. This is maintained separately at: |
1a317551 | 35 | |
9755cbdb | 36 | http://www.ntrnet.net/~jmknoble/software/x11-ssh-askpass/index.html |
1a317551 | 37 | |
e1dd3a7a | 38 | PRNGD: |
39 | ||
40 | If your system lacks Kernel based random collection, the use of Lutz | |
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: |
53 | http://www.sparc.spb.su/solaris/skey/ | |
54 | ||
55 | If you wish to use --with-skey then you will need the above library | |
56 | installed. No other current S/Key library is currently known to be | |
44d5f7f7 | 57 | supported. |
d8f1edd5 | 58 | |
8bc7973f | 59 | 2. Building / Installation |
60 | -------------------------- | |
61 | ||
62 | To install OpenSSH with default options: | |
63 | ||
64 | ./configure | |
65 | make | |
66 | make install | |
67 | ||
68 | This will install the OpenSSH binaries in /usr/local/bin, configuration files | |
69 | in /usr/local/etc, the server in /usr/local/sbin, etc. To specify a different | |
70 | installation prefix, use the --prefix option to configure: | |
71 | ||
72 | ./configure --prefix=/opt | |
73 | make | |
74 | make install | |
75 | ||
76 | Will install OpenSSH in /opt/{bin,etc,lib,sbin}. You can also override | |
77 | specific paths, for example: | |
78 | ||
79 | ./configure --prefix=/opt --sysconfdir=/etc/ssh | |
80 | make | |
81 | make install | |
82 | ||
83 | This will install the binaries in /opt/{bin,lib,sbin}, but will place the | |
84 | configuration files in /etc/ssh. | |
85 | ||
4b28be2c | 86 | If you are using PAM, you may need to manually install a PAM control |
87 | file as "/etc/pam.d/sshd" (or wherever your system prefers to keep | |
88 | them). Note that the service name used to start PAM is __progname, | |
89 | which is the basename of the path of your sshd (e.g., the service name | |
90 | for /usr/sbin/osshd will be osshd). If you have renamed your sshd | |
91 | executable, your PAM configuration may need to be modified. | |
92 | ||
93 | A generic PAM configuration is included as "contrib/sshd.pam.generic", | |
94 | you may need to edit it before using it on your system. If you are | |
95 | using a recent version of Red Hat Linux, the config file in | |
96 | contrib/redhat/sshd.pam should be more useful. Failure to install a | |
97 | valid PAM file may result in an inability to use password | |
98 | authentication. On HP-UX 11 and Solaris, the standard /etc/pam.conf | |
99 | configuration will work with sshd (sshd will match the other service | |
ca86bb3f | 100 | name). |
529c5440 | 101 | |
8bc7973f | 102 | There are a few other options to the configure script: |
103 | ||
af8fda37 | 104 | --with-pam enables PAM support. |
0bc5b6fb | 105 | |
721c55f0 | 106 | --enable-gnome-askpass will build the GNOME passphrase dialog. You |
107 | need a working installation of GNOME, including the development | |
108 | headers, for this to work. | |
8bc7973f | 109 | |
9bdd5929 | 110 | --with-prngd-socket=/some/file allows you to enable EGD or PRNGD |
111 | support and to specify a PRNGd socket. Use this if your Unix lacks | |
112 | /dev/random and you don't want to use OpenSSH's builtin entropy | |
113 | collection support. | |
114 | ||
115 | --with-prngd-port=portnum allows you to enable EGD or PRNGD support | |
116 | and to specify a EGD localhost TCP port. Use this if your Unix lacks | |
e1dd3a7a | 117 | /dev/random and you don't want to use OpenSSH's builtin entropy |
118 | collection support. | |
8bc7973f | 119 | |
0bc5b6fb | 120 | --with-lastlog=FILE will specify the location of the lastlog file. |
121 | ./configure searches a few locations for lastlog, but may not find | |
122 | it if lastlog is installed in a different place. | |
123 | ||
124 | --without-lastlog will disable lastlog support entirely. | |
125 | ||
99c8ddac | 126 | --with-sia, --without-sia will enable or disable OSF1's Security |
127 | Integration Architecture. The default for OSF1 machines is enable. | |
128 | ||
dfb95100 | 129 | --with-kerberos4=PATH will enable Kerberos IV support. You will need |
130 | to have the Kerberos libraries and header files installed for this | |
131 | to work. Use the optional PATH argument to specify the root of your | |
132 | Kerberos installation. | |
133 | ||
134 | --with-afs=PATH will enable AFS support. You will need to have the | |
135 | Kerberos IV and the AFS libraries and header files installed for this | |
136 | to work. Use the optional PATH argument to specify the root of your | |
137 | AFS installation. AFS requires Kerberos support to be enabled. | |
721c55f0 | 138 | |
3e366738 | 139 | --with-skey=PATH will enable S/Key one time password support. You will |
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 | |
146 | if your operating system uses MD5 passwords without using PAM. | |
045672f9 | 147 | |
0bc5b6fb | 148 | --with-utmpx enables utmpx support. utmpx support is automatic for |
149 | some platforms. | |
150 | ||
151 | --without-shadow disables shadow password support. | |
152 | ||
153 | --with-ipaddr-display forces the use of a numeric IP address in the | |
154 | $DISPLAY environment variable. Some broken systems need this. | |
155 | ||
156 | --with-default-path=PATH allows you to specify a default $PATH for sessions | |
bd499f9e | 157 | started by sshd. This replaces the standard path entirely. |
0bc5b6fb | 158 | |
47e45e44 | 159 | --with-pid-dir=PATH specifies the directory in which the ssh.pid file is |
160 | created. | |
161 | ||
162 | --with-xauth=PATH specifies the location of the xauth binary | |
163 | ||
59e76f33 | 164 | --with-ipv4-default instructs OpenSSH to use IPv4 by default for new |
165 | connections. Normally OpenSSH will try attempt to lookup both IPv6 and | |
166 | IPv4 addresses. On Linux/glibc-2.1.2 this causes long delays in name | |
167 | resolution. If this option is specified, you can still attempt to | |
168 | connect to IPv6 addresses using the command line option '-6'. | |
169 | ||
d581b7ae | 170 | --with-ssl-dir=DIR allows you to specify where your OpenSSL libraries |
171 | are installed. | |
172 | ||
b7a9ce47 | 173 | --with-4in6 Check for IPv4 in IPv6 mapped addresses and convert them to |
174 | real (AF_INET) IPv4 addresses. Works around some quirks on Linux. | |
175 | ||
295c8801 | 176 | --with-opensc=DIR |
177 | --with-sectok=DIR allows for OpenSC or sectok smartcard libraries to | |
178 | be used with OpenSSH. See 'README.smartcard' for more details. | |
179 | ||
d94aa2ae | 180 | If you need to pass special options to the compiler or linker, you |
c04f75f1 | 181 | can specify these as environment variables before running ./configure. |
d94aa2ae | 182 | For example: |
183 | ||
b817711d | 184 | CFLAGS="-O -m486" LDFLAGS="-s" LIBS="-lrubbish" LD="/usr/foo/ld" ./configure |
8bc7973f | 185 | |
186 | 3. Configuration | |
187 | ---------------- | |
188 | ||
189 | The runtime configuration files are installed by in ${prefix}/etc or | |
190 | whatever you specified as your --sysconfdir (/usr/local/etc by default). | |
191 | ||
192 | The default configuration should be instantly usable, though you should | |
193 | review it to ensure that it matches your security requirements. | |
194 | ||
6bf4d066 | 195 | To generate a host key, run "make host-key". Alternately you can do so |
74b224a0 | 196 | manually using the following commands: |
3e807d1e | 197 | |
af8fda37 | 198 | ssh-keygen -t rsa1 -f /etc/ssh/ssh_host_key -N "" |
199 | ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key -N "" | |
200 | ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key -N "" | |
3e807d1e | 201 | |
7303768f | 202 | Replacing /etc/ssh with the correct path to the configuration directory. |
203 | (${prefix}/etc or whatever you specified with --sysconfdir during | |
204 | configuration) | |
205 | ||
60d804c8 | 206 | If you have configured OpenSSH with EGD support, ensure that EGD is |
207 | running and has collected some Entropy. | |
208 | ||
8bc7973f | 209 | For more information on configuration, please refer to the manual pages |
210 | for sshd, ssh and ssh-agent. | |
211 | ||
7303768f | 212 | 4. Problems? |
213 | ------------ | |
214 | ||
215 | If you experience problems compiling, installing or running OpenSSH. | |
216 | Please refer to the "reporting bugs" section of the webpage at | |
c04f75f1 | 217 | http://www.openssh.com/ |
7303768f | 218 | |
0b202697 | 219 | |
220 | $Id$ |