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8bc7973f | 1 | 1. Prerequisites |
2 | ---------------- | |
3 | ||
4 | You will need working installations of Zlib and OpenSSL. | |
5 | ||
6 | Zlib: | |
c04f75f1 | 7 | http://www.freesoftware.com/pub/infozip/zlib/ |
8bc7973f | 8 | |
72567c57 | 9 | OpenSSL 0.9.5a or greater: |
8bc7973f | 10 | http://www.openssl.org/ |
11 | ||
af8fda37 | 12 | RPMs of OpenSSL are available at http://violet.ibs.com.au/openssh/files/support. |
13 | For Red Hat Linux 6.2, they have been released as errata. RHL7 includes | |
14 | these. | |
c323ac76 | 15 | |
8bc7973f | 16 | OpenSSH can utilise Pluggable Authentication Modules (PAM) if your system |
ca86bb3f | 17 | supports it. PAM is standard on Redhat and Debian Linux, Solaris and |
18 | HP-UX 11. | |
8bc7973f | 19 | |
20 | PAM: | |
21 | http://www.kernel.org/pub/linux/libs/pam/ | |
22 | ||
1a317551 | 23 | If you wish to build the GNOME passphrase requester, you will need the GNOME |
8bc7973f | 24 | libraries and headers. |
25 | ||
26 | GNOME: | |
27 | http://www.gnome.org/ | |
28 | ||
986a22ec | 29 | Alternatively, Jim Knoble <jmknoble@jmknoble.cx> has written an excellent X11 |
ff8ecdb8 | 30 | passphrase requester. This is maintained separately at: |
1a317551 | 31 | |
9755cbdb | 32 | http://www.ntrnet.net/~jmknoble/software/x11-ssh-askpass/index.html |
1a317551 | 33 | |
e1dd3a7a | 34 | PRNGD: |
35 | ||
36 | If your system lacks Kernel based random collection, the use of Lutz | |
37 | Jaenicke's PRNGd is recommended. | |
38 | ||
39 | http://www.aet.tu-cottbus.de/personen/jaenicke/postfix_tls/prngd.html | |
40 | ||
41 | EGD: | |
42 | ||
e93ee87a | 43 | The Entropy Gathering Daemon (EGD) is supported if you have a system which |
44 | lacks /dev/random and don't want to use OpenSSH's internal entropy collection. | |
8bc7973f | 45 | |
8bc7973f | 46 | http://www.lothar.com/tech/crypto/ |
47 | ||
9c08d6ce | 48 | GNU Make: |
49 | ftp://ftp.gnu.org/gnu/make/ | |
50 | ||
51 | OpenSSH has only been tested with GNU make. It may work with other | |
52 | 'make' programs, but you are on your own. | |
8bc7973f | 53 | |
782d6a0d | 54 | PCRE (PERL-compatible Regular Expression library): |
66d6c27e | 55 | ftp://ftp.cus.cam.ac.uk/pub/software/programs/pcre/ |
d8f1edd5 | 56 | |
782d6a0d | 57 | Most platforms do not require this. However older Unices may not have a |
58 | posix regex library. PCRE provides a POSIX interface. | |
d8f1edd5 | 59 | |
3e366738 | 60 | S/Key Libraries: |
61 | http://www.sparc.spb.su/solaris/skey/ | |
62 | ||
63 | If you wish to use --with-skey then you will need the above library | |
64 | installed. No other current S/Key library is currently known to be | |
44d5f7f7 | 65 | supported. |
d8f1edd5 | 66 | |
8bc7973f | 67 | 2. Building / Installation |
68 | -------------------------- | |
69 | ||
70 | To install OpenSSH with default options: | |
71 | ||
72 | ./configure | |
73 | make | |
74 | make install | |
75 | ||
76 | This will install the OpenSSH binaries in /usr/local/bin, configuration files | |
77 | in /usr/local/etc, the server in /usr/local/sbin, etc. To specify a different | |
78 | installation prefix, use the --prefix option to configure: | |
79 | ||
80 | ./configure --prefix=/opt | |
81 | make | |
82 | make install | |
83 | ||
84 | Will install OpenSSH in /opt/{bin,etc,lib,sbin}. You can also override | |
85 | specific paths, for example: | |
86 | ||
87 | ./configure --prefix=/opt --sysconfdir=/etc/ssh | |
88 | make | |
89 | make install | |
90 | ||
91 | This will install the binaries in /opt/{bin,lib,sbin}, but will place the | |
92 | configuration files in /etc/ssh. | |
93 | ||
ca86bb3f | 94 | If you are using PAM, you may need to manually install a PAM |
b7a9ce47 | 95 | control file as "/etc/pam.d/sshd" (or wherever your system |
96 | prefers to keep them). A generic PAM configuration is included as | |
97 | "contrib/sshd.pam.generic", you may need to edit it before using it on | |
af8fda37 | 98 | your system. If you are using a recent version of Red Hat Linux, the |
74b224a0 | 99 | config file in contrib/redhat/sshd.pam should be more useful. |
100 | Failure to install a valid PAM file may result in an inability to | |
ca86bb3f | 101 | use password authentication. On HP-UX 11, the standard /etc/pam.conf |
102 | configuration will work with sshd (sshd will match the OTHER service | |
103 | name). | |
529c5440 | 104 | |
8bc7973f | 105 | There are a few other options to the configure script: |
106 | ||
0bc5b6fb | 107 | --with-rsh=PATH allows you to specify the path to your rsh program. |
108 | Normally ./configure will search the current $PATH for 'rsh'. You | |
109 | may need to specify this option if rsh is not in your path or has a | |
110 | different name. | |
111 | ||
af8fda37 | 112 | --with-pam enables PAM support. |
0bc5b6fb | 113 | |
721c55f0 | 114 | --enable-gnome-askpass will build the GNOME passphrase dialog. You |
115 | need a working installation of GNOME, including the development | |
116 | headers, for this to work. | |
8bc7973f | 117 | |
721c55f0 | 118 | --with-random=/some/file allows you to specify an alternate source of |
c04f75f1 | 119 | random numbers (the default is /dev/urandom). Unless you are absolutely |
8bc7973f | 120 | sure of what you are doing, it is best to leave this alone. |
121 | ||
9bdd5929 | 122 | --with-prngd-socket=/some/file allows you to enable EGD or PRNGD |
123 | support and to specify a PRNGd socket. Use this if your Unix lacks | |
124 | /dev/random and you don't want to use OpenSSH's builtin entropy | |
125 | collection support. | |
126 | ||
127 | --with-prngd-port=portnum allows you to enable EGD or PRNGD support | |
128 | and to specify a EGD localhost TCP port. Use this if your Unix lacks | |
e1dd3a7a | 129 | /dev/random and you don't want to use OpenSSH's builtin entropy |
130 | collection support. | |
8bc7973f | 131 | |
0bc5b6fb | 132 | --with-lastlog=FILE will specify the location of the lastlog file. |
133 | ./configure searches a few locations for lastlog, but may not find | |
134 | it if lastlog is installed in a different place. | |
135 | ||
136 | --without-lastlog will disable lastlog support entirely. | |
137 | ||
dfb95100 | 138 | --with-kerberos4=PATH will enable Kerberos IV support. You will need |
139 | to have the Kerberos libraries and header files installed for this | |
140 | to work. Use the optional PATH argument to specify the root of your | |
141 | Kerberos installation. | |
142 | ||
143 | --with-afs=PATH will enable AFS support. You will need to have the | |
144 | Kerberos IV and the AFS libraries and header files installed for this | |
145 | to work. Use the optional PATH argument to specify the root of your | |
146 | AFS installation. AFS requires Kerberos support to be enabled. | |
721c55f0 | 147 | |
3e366738 | 148 | --with-skey=PATH will enable S/Key one time password support. You will |
149 | need the S/Key libraries and header files installed for this to work. | |
721c55f0 | 150 | |
151 | --with-tcp-wrappers will enable TCP Wrappers (/etc/hosts.allow|deny) | |
152 | support. You will need libwrap.a and tcpd.h installed. | |
153 | ||
154 | --with-md5-passwords will enable the use of MD5 passwords. Enable this | |
155 | if your operating system uses MD5 passwords without using PAM. | |
045672f9 | 156 | |
0bc5b6fb | 157 | --with-utmpx enables utmpx support. utmpx support is automatic for |
158 | some platforms. | |
159 | ||
160 | --without-shadow disables shadow password support. | |
161 | ||
162 | --with-ipaddr-display forces the use of a numeric IP address in the | |
163 | $DISPLAY environment variable. Some broken systems need this. | |
164 | ||
165 | --with-default-path=PATH allows you to specify a default $PATH for sessions | |
bd499f9e | 166 | started by sshd. This replaces the standard path entirely. |
0bc5b6fb | 167 | |
47e45e44 | 168 | --with-pid-dir=PATH specifies the directory in which the ssh.pid file is |
169 | created. | |
170 | ||
171 | --with-xauth=PATH specifies the location of the xauth binary | |
172 | ||
59e76f33 | 173 | --with-ipv4-default instructs OpenSSH to use IPv4 by default for new |
174 | connections. Normally OpenSSH will try attempt to lookup both IPv6 and | |
175 | IPv4 addresses. On Linux/glibc-2.1.2 this causes long delays in name | |
176 | resolution. If this option is specified, you can still attempt to | |
177 | connect to IPv6 addresses using the command line option '-6'. | |
178 | ||
d581b7ae | 179 | --with-ssl-dir=DIR allows you to specify where your OpenSSL libraries |
180 | are installed. | |
181 | ||
b7a9ce47 | 182 | --with-4in6 Check for IPv4 in IPv6 mapped addresses and convert them to |
183 | real (AF_INET) IPv4 addresses. Works around some quirks on Linux. | |
184 | ||
d94aa2ae | 185 | If you need to pass special options to the compiler or linker, you |
c04f75f1 | 186 | can specify these as environment variables before running ./configure. |
d94aa2ae | 187 | For example: |
188 | ||
b817711d | 189 | CFLAGS="-O -m486" LDFLAGS="-s" LIBS="-lrubbish" LD="/usr/foo/ld" ./configure |
8bc7973f | 190 | |
191 | 3. Configuration | |
192 | ---------------- | |
193 | ||
194 | The runtime configuration files are installed by in ${prefix}/etc or | |
195 | whatever you specified as your --sysconfdir (/usr/local/etc by default). | |
196 | ||
197 | The default configuration should be instantly usable, though you should | |
198 | review it to ensure that it matches your security requirements. | |
199 | ||
6bf4d066 | 200 | To generate a host key, run "make host-key". Alternately you can do so |
74b224a0 | 201 | manually using the following commands: |
3e807d1e | 202 | |
af8fda37 | 203 | ssh-keygen -t rsa1 -f /etc/ssh/ssh_host_key -N "" |
204 | ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key -N "" | |
205 | ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key -N "" | |
3e807d1e | 206 | |
7303768f | 207 | Replacing /etc/ssh with the correct path to the configuration directory. |
208 | (${prefix}/etc or whatever you specified with --sysconfdir during | |
209 | configuration) | |
210 | ||
60d804c8 | 211 | If you have configured OpenSSH with EGD support, ensure that EGD is |
212 | running and has collected some Entropy. | |
213 | ||
8bc7973f | 214 | For more information on configuration, please refer to the manual pages |
215 | for sshd, ssh and ssh-agent. | |
216 | ||
7303768f | 217 | 4. Problems? |
218 | ------------ | |
219 | ||
220 | If you experience problems compiling, installing or running OpenSSH. | |
221 | Please refer to the "reporting bugs" section of the webpage at | |
c04f75f1 | 222 | http://www.openssh.com/ |
7303768f | 223 | |
0b202697 | 224 | |
225 | $Id$ |