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annotate debian/dropbear.README.Debian @ 1715:3974f087d9c0

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Disallow leading lines before the ident for server (#102) Per RFC4253 4.2 clients must be able to process other lines of data before the version string, server behavior is not defined neither with MUST/SHOULD nor with MAY. If server process up to 50 lines too - it may cause too long hanging session with invalid/evil client that consume host resources and potentially may lead to DDoS on poor embedded boxes. Let's require first line from client to be version string and fail early if it's not - matches both RFC and real OpenSSH behavior.
author Vladislav Grishenko <themiron@users.noreply.github.com>
date Mon, 15 Jun 2020 18:22:18 +0500
parents 8c2d2edadf2a
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 Dropbear for Debian
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2 -------------------
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4 This package will attempt to setup the Dropbear ssh server to listen on
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5 port 22. If the OpenSSH server package ("openssh-server") is installed,
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6 the file /etc/default/dropbear will be set up so that the server does not
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7 start by default.
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9 You can run Dropbear concurrently with OpenSSH 'sshd' by modifying
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10 /etc/default/dropbear so that "NO_START" is set to "0", and changing the
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11 port number that Dropbear runs on. Follow the instructions in the file.
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13 This package suggests you install the "openssh-client" package, which
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14 provides the "ssh" client program, as well as the "/usr/bin/scp" binary
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15 you will need to be able to retrieve files via SCP from a server running
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16 Dropbear.
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18 See the Dropbear homepage for more information:
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19 http://matt.ucc.asn.au/dropbear/dropbear.html