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comparison debian/dropbear.README.Debian @ 469:8c2d2edadf2a

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Update to debian 0.50-4 diff
author Matt Johnston <matt@ucc.asn.au>
date Thu, 27 Mar 2008 10:19:28 +0000
parents 1857c2c551ea
children
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467:0871a0b89f7c 469:8c2d2edadf2a
1 Dropbear for Debian 1 Dropbear for Debian
2 ------------------- 2 -------------------
3 3
4 This package will attempt to listen on port 22. If the OpenSSH 4 This package will attempt to setup the Dropbear ssh server to listen on
5 package ("ssh") is installed, the file /etc/default/dropbear 5 port 22. If the OpenSSH server package ("openssh-server") is installed,
6 will be set up so that the server does not start by default. 6 the file /etc/default/dropbear will be set up so that the server does not
7 start by default.
7 8
8 You can run Dropbear concurrently with OpenSSH 'sshd' by 9 You can run Dropbear concurrently with OpenSSH 'sshd' by modifying
9 modifying /etc/default/dropbear so that "NO_START" is set to 10 /etc/default/dropbear so that "NO_START" is set to "0", and changing the
10 "0" and changing the port number that Dropbear runs on. Follow 11 port number that Dropbear runs on. Follow the instructions in the file.
11 the instructions in the file.
12 12
13 This package suggests you install the "ssh" package. This package 13 This package suggests you install the "openssh-client" package, which
14 provides the "ssh" client program, as well as the "/usr/bin/scp" 14 provides the "ssh" client program, as well as the "/usr/bin/scp" binary
15 binary you will need to be able to retrieve files from a server 15 you will need to be able to retrieve files via SCP from a server running
16 running Dropbear via SCP. 16 Dropbear.
17
18 Replacing OpenSSH "sshd" with Dropbear
19 --------------------------------------
20
21 You will still want to have the "ssh" package installed, as it
22 provides the "ssh" and "scp" binaries. When you install this
23 package, it checks for existing OpenSSH host keys and if found,
24 converts them to the Dropbear format.
25
26 If this appears to have worked, you should be able to change over
27 by following these steps:
28
29 1. Stop the OpenSSH server
30 % /etc/init.d/ssh stop
31 2. Prevent the OpenSSH server from starting in the future
32 % touch /etc/ssh/sshd_not_to_be_run
33 3. Modify the Dropbear defaults file, set NO_START to 0 and
34 ensure DROPBEAR_PORT is set to 22.
35 % editor /etc/default/dropbear
36 4. Restart the Dropbear server.
37 % /etc/init.d/dropbear restart
38 17
39 See the Dropbear homepage for more information: 18 See the Dropbear homepage for more information:
40 http://matt.ucc.asn.au/dropbear/dropbear.html 19 http://matt.ucc.asn.au/dropbear/dropbear.html
41
42
43 Entropy from /dev/random
44 ------------------------
45
46 The dropbear binary package is configured at compile time to read
47 entropy from /dev/random. If /dev/random on a system blocks when
48 reading data from it, client logins may be delayed until the client
49 times out. The dropbear server writes a notice to the logs when it
50 sees /dev/random blocking. A workaround for such systems is to
51 re-compile the package with DROPBEAR_RANDOM_DEV set to /dev/urandom
52 in options.h.