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Use DSCP for IP QoS traffic classes The previous TOS values are deprecated and not used by modern traffic classifiers. This sets AF21 for "interactive" traffic (with a tty). Non-tty traffic sets AF11 - that indicates high throughput but is not lowest priority (which would be CS1 or LE). This differs from the CS1 used by OpenSSH, it lets interactive git over SSH have higher priority than background least effort traffic. Dropbear's settings here should be suitable with the diffservs used by CAKE qdisc.
author Matt Johnston <matt@ucc.asn.au>
date Tue, 25 Jan 2022 17:32:20 +0800
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children
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1 Dropbear for Debian
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2 -------------------
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4 This package will attempt to listen on port 22. If the OpenSSH
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5 package ("ssh") is installed, the file /etc/default/dropbear
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6 will be set up so that the server does not start by default.
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8 You can run Dropbear concurrently with OpenSSH 'sshd' by
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9 modifying /etc/default/dropbear so that "NO_START" is set to
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10 "0" and changing the port number that Dropbear runs on. Follow
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11 the instructions in the file.
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13 This package suggests you install the "ssh" package. This package
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14 provides the "ssh" client program, as well as the "/usr/bin/scp"
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15 binary you will need to be able to retrieve files from a server
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16 running Dropbear via SCP.
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18 Replacing OpenSSH "sshd" with Dropbear
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19 --------------------------------------
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21 You will still want to have the "ssh" package installed, as it
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22 provides the "ssh" and "scp" binaries. When you install this
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23 package, it checks for existing OpenSSH host keys and if found,
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24 converts them to the Dropbear format.
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26 If this appears to have worked, you should be able to change over
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27 by following these steps:
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29 1. Stop the OpenSSH server
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30 % /etc/init.d/ssh stop
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31 2. Prevent the OpenSSH server from starting in the future
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32 % touch /etc/ssh/sshd_not_to_be_run
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33 3. Modify the Dropbear defaults file, set NO_START to 0 and
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34 ensure DROPBEAR_PORT is set to 22.
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35 % editor /etc/default/dropbear
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36 4. Restart the Dropbear server.
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37 % /etc/init.d/dropbear restart
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39 See the Dropbear homepage for more information:
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40 http://matt.ucc.asn.au/dropbear/dropbear.html
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