1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
This package is the actual port of OpenSSH to Cygwin 1.1.
===========================================================================
Important change since 2.3.0p1:
When using `ntea' or `ntsec' you now have to care for the ownership
and permission bits of your host key files and your private key files.
The host key files have to be owned by the NT account which starts
sshd. The user key files have to be owned by the user. The permission
bits of the private key files (host and user) have to be at least
rw------- (0600)!
Note that this is forced under `ntsec' only if the files are on a NTFS
filesystem (which is recommended) due to the lack of any basic security
features of the FAT/FAT32 filesystems.
===========================================================================
If you are installing OpenSSH the first time, you can generate global config
files and server keys by running
/usr/bin/ssh-host-config
Note that this binary archive doesn't contain default config files in /etc.
That files are only created if ssh-host-config is started.
If you are updating your installation you may run the above ssh-host-config
as well to move your configuration files to the new location and to
erase the files at the old location.
To support testing and unattended installation ssh-host-config got
some options:
usage: ssh-host-config [OPTION]...
Options:
--debug -d Enable shell's debug output.
--yes -y Answer all questions with "yes" automatically.
--no -n Answer all questions with "no" automatically.
--port -p <n> sshd listens on port n.
You can create the private and public keys for a user now by running
/usr/bin/ssh-user-config
under the users account.
To support testing and unattended installation ssh-user-config got
some options as well:
usage: ssh-user-config [OPTION]...
Options:
--debug -d Enable shell's debug output.
--yes -y Answer all questions with "yes" automatically.
--no -n Answer all questions with "no" automatically.
--passphrase -p word Use "word" as passphrase automatically.
Install sshd as daemon via SRVANY.EXE (recommended on NT/W2K), via inetd
(results in very slow deamon startup!) or from the command line (recommended
on 9X/ME).
If you start sshd as deamon via SRVANY.EXE you will see two
sshd processes in the process list unless you give the "-D"
option to sshd. That will avoid that sshd detaches from the
controlling terminal and it will remain under process control
of SRVANY.EXE. That allows easy killing of the service by
using the `net stop <servicename>' command.
If starting via inetd, copy sshd to eg. /usr/sbin/in.sshd and add the
following line to your inetd.conf file:
sshd stream tcp nowait root /usr/sbin/in.sshd sshd -i
Moreover you'll have to add the following line to your
${SYSTEMROOT}/system32/drivers/etc/services file:
sshd 22/tcp #SSH daemon
Authentication to sshd is possible in one of two ways.
You'll have to decide before starting sshd!
- If you want to authenticate via RSA and you want to login to that
machine to exactly one user account you can do so by running sshd
under that user account. You must change /etc/sshd_config
to contain the following:
RSAAuthentication yes
Moreover it's possible to use rhosts and/or rhosts with
RSA authentication by setting the following in sshd_config:
RhostsAuthentication yes
RhostsRSAAuthentication yes
- If you want to be able to login to different user accounts you'll
have to start sshd under system account or any other account that
is able to switch user context. Note that administrators are _not_
able to do that by default! You'll have to give the following
special user rights to the user:
"Act as part of the operating system"
"Replace process level token"
"Increase quotas"
and if used via service manager
"Logon as a service".
The system account does of course own that user rights by default.
Unfortunately, if you choose that way, you can only logon with
NT password authentification and you should change
/etc/sshd_config to contain the following:
PasswordAuthentication yes
RhostsAuthentication no
RhostsRSAAuthentication no
RSAAuthentication no
However you can login to the user which has started sshd with
RSA authentication anyway. If you want that, change the RSA
authentication setting back to "yes":
RSAAuthentication yes
Please note that OpenSSH does never use the value of $HOME to
search for the users configuration files! It always uses the
value of the pw_dir field in /etc/passwd as the home directory.
If no home diretory is set in /etc/passwd, the root directory
is used instead!
You may use all features of the CYGWIN=ntsec setting the same
way as they are used by the `login' port on sources.redhat.com:
The pw_gecos field may contain an additional field, that begins
with (upper case!) "U-", followed by the domain and the username
separated by a backslash.
CAUTION: The SID _must_ remain the _last_ field in pw_gecos!
BTW: The field separator in pw_gecos is the comma.
The username in pw_name itself may be any nice name:
domuser::1104:513:John Doe,U-domain\user,S-1-5-21-...
Now you may use `domuser' as your login name with telnet!
This is possible additionally for local users, if you don't like
your NT login name ;-) You only have to leave out the domain:
locuser::1104:513:John Doe,U-user,S-1-5-21-...
SSH2 server and user keys are generated by the `ssh-*-config' scripts
as well.
SSH2 authentication similar to SSH1:
Add keys to ~/.ssh/authorized_keys2
Interop. w/ ssh.com dsa-keys:
ssh-keygen -f /key/from/ssh.com -X >> ~/.ssh/authorized_keys2
and vice versa:
ssh-keygen -f /privatekey/from/openssh -x > ~/.ssh2/mykey.pub
echo Key mykey.pub >> ~/.ssh2/authorization
If you want to build from source, the following options to
configure are used for the Cygwin binary distribution:
--prefix=/usr --sysconfdir=/etc --libexecdir='${exec_prefix}/sbin
You must have installed the zlib, openssl and regex packages to
be able to build OpenSSH!
Please send requests, error reports etc. to cygwin@sources.redhat.com.
Have fun,
Corinna Vinschen <vinschen@cygnus.com>
Cygwin Developer
Red Hat Inc.
|
