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Upstream seems to intend to gradually phase this out, so don't assume
that this will remain the default forever. However, we were late in
adopting the upstream sshd_config changes, so it makes sense to extend
the grace period.
Bug-Debian: https://bugs.debian.org/852320
Forwarded: not-needed
Last-Update: 2017-03-05
Patch-Name: restore-authorized_keys2.patch
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ssh: Enable ForwardX11Trusted, returning to earlier semantics which cause
fewer problems with existing setups (http://bugs.debian.org/237021).
ssh: Set 'SendEnv LANG LC_*' by default (http://bugs.debian.org/264024).
ssh: Enable HashKnownHosts by default to try to limit the spread of ssh
worms.
ssh: Enable GSSAPIAuthentication by default.
ssh: Include /etc/ssh/ssh_config.d/*.conf.
sshd: Enable PAM, disable ChallengeResponseAuthentication, and disable
PrintMotd.
sshd: Enable X11Forwarding.
sshd: Set 'AcceptEnv LANG LC_*' by default.
sshd: Change sftp subsystem path to /usr/lib/openssh/sftp-server.
sshd: Include /etc/ssh/sshd_config.d/*.conf.
Document all of this.
Author: Russ Allbery <rra@debian.org>
Forwarded: not-needed
Last-Update: 2020-02-21
Patch-Name: debian-config.patch
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This patch has been rejected upstream: "None of the OpenSSH developers are
in favour of adding this, and this situation has not changed for several
years. This is not a slight on Simon's patch, which is of fine quality, but
just that a) we don't trust GSSAPI implementations that much and b) we don't
like adding new KEX since they are pre-auth attack surface. This one is
particularly scary, since it requires hooks out to typically root-owned
system resources."
However, quite a lot of people rely on this in Debian, and it's better to
have it merged into the main openssh package rather than having separate
-krb5 packages (as we used to have). It seems to have a generally good
security history.
Origin: other, https://github.com/openssh-gsskex/openssh-gsskex/commits/debian/master
Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1242
Last-Updated: 2020-02-21
Patch-Name: gssapi.patch
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ok dtucker
OpenBSD-Commit-ID: 7080be73a64d68e21f22f5408a67a0ba8b1b6b06
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stanza and manpage bits; from Colin Watson via bz#2662, ok dtucker@
OpenBSD-Commit-ID: d33a849f481684ff655c140f5eb1b4acda8c5c09
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Mark the sshd_config UsePrivilegeSeparation option as
deprecated, effectively making privsep mandatory in sandboxing mode. ok
markus@ deraadt@
(note: this doesn't remove the !privsep code paths, though that will
happen eventually).
Upstream-ID: b4c52666256c4dd865f8ce9431af5d6ce2d74a0a
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Catch up with the SSH1 code removal and delete all
mention of protocol 1 particularities, key files and formats, command line
options, and configuration keywords from the server documentation and
examples. ok jmc@
Upstream-ID: 850328854675b4b6a0d4a90f0b4a9dd9ca4e905f
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obsolete note about fascistloggin is obsolete. ok djm
dtucker
Upstream-ID: dae60df23b2bb0e89f42661ddd96a7b0d1b7215a
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make sandboxed privilege separation the default, not just
for new installs; "absolutely" deraadt@
Upstream-ID: 5221ef3b927d2df044e9aa3f5db74ae91743f69b
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add prohibit-password as a synonymn for without-password,
since the without-password is causing too many questions. Harden it to ban
all but pubkey, hostbased, and GSSAPI auth (when the latter is enabled) from
djm, ok markus
Upstream-ID: d53317d7b28942153e6236d3fd6e12ceb482db7a
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change default: PermitRootLogin without-password matching
install script changes coming as well ok djm markus
Upstream-ID: 0e2a6c4441daf5498b47a61767382bead5eb8ea6
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Make sshd default to PermitRootLogin=no; ok deraadt@
rpe@
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increasing encounters with difficult DNS setups in
darknets has convinced me UseDNS off by default is better ok djm
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[sshd_config]
the /etc/ssh/ssh_host_ed25519_key is loaded by default too
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[servconf.c servconf.h session.c sshd_config sshd_config.5]
shd_config PermitTTY to disallow TTY allocation, mirroring the
longstanding no-pty authorized_keys option;
bz#2070, patch from Teran McKinney; ok markus@
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[sshd_config]
Remove commented-out kerberos/gssapi config options from sample config,
kerberos support is currently not enabled in ssh in OpenBSD. Discussed with
various people; ok deraadt@
ID SYNC ONLY for portable; kerberos/gssapi is still pretty popular
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[sshd_config.5 servconf.c servconf.h packet.c serverloop.c monitor.c sshd_config
sshd.c] Add RekeyLimit to sshd with the same syntax as the client allowing
rekeying based on traffic volume or time. ok djm@, help & ok jmc@ for the man
page.
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[servconf.c sshd_config sshd_config.5]
Change default of MaxStartups to 10:30:100 to start doing random early
drop at 10 connections up to 100 connections. This will make it harder
to DoS as CPUs have come a long way since the original value was set
back in 2000. Prompted by nion at debian org, ok markus@
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[auth-rsa.c auth.c auth.h auth2-pubkey.c servconf.c servconf.h]
[sshd.c sshd_config sshd_config.5]
new sshd_config option AuthorizedKeysCommand to support fetching
authorized_keys from a command in addition to (or instead of) from
the filesystem. The command is run as the target server user unless
another specified via a new AuthorizedKeysCommandUser option.
patch originally by jchadima AT redhat.com, reworked by me; feedback
and ok markus@
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[servconf.c servconf.h sshd.c sshd_config]
Turn on systrace sandboxing of pre-auth sshd by default for new installs
by shipping a config that overrides the current UsePrivilegeSeparation=yes
default. Make it easier to flip the default in the future by adding too.
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[sshd_config sshd_config.5]
mention AuthorizedPrincipalsFile=none default
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[servconf.c servconf.h sshd.c sshd_config sshd_config.5]
VersionAddendum option to allow server operators to append some arbitrary
text to the SSH-... banner; ok deraadt@ "don't care" markus@
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- djm@cvs.openbsd.org 2011/05/23 03:30:07
[auth-rsa.c auth.c auth.h auth2-pubkey.c monitor.c monitor_wrap.c pathnames.h servconf.c servconf.h sshd.8 sshd_config sshd_config.5]
allow AuthorizedKeysFile to specify multiple files, separated by spaces.
Bring back authorized_keys2 as a default search path (to avoid breaking
existing users of this file), but override this in sshd_config so it will
be no longer used on fresh installs. Maybe in 2015 we can remove it
entierly :)
feedback and ok markus@ dtucker@
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[sshd_config]
clarify language about overriding defaults. bz#1892, from Petr Cerny
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[sshd_config]
add ssh_host_ecdsa_key to /etc; from Mattieu Baptiste
<mattieu.b@gmail.com>
ok deraadt@
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- markus@cvs.openbsd.org 2009/10/08 14:03:41
[sshd_config readconf.c ssh_config.5 servconf.c sshd_config.5]
disable protocol 1 by default (after a transition period of about 10 years)
ok deraadt
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[sshd_config sshd_config.5 sshd.8 servconf.c]
increase default size of ssh protocol 1 ephemeral key from 768 to 1024
bits; prodded by & ok dtucker@ ok deraadt@
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[monitor.c monitor_wrap.c session.h servconf.c servconf.h session.c]
[sshd_config sshd_config.5]
Make the maximum number of sessions run-time controllable via
a sshd_config MaxSessions knob. This is useful for disabling
login/shell/subsystem access while leaving port-forwarding working
(MaxSessions 0), disabling connection multiplexing (MaxSessions 1) or
simply increasing the number of allows multiplexed sessions.
Because some bozos are sure to configure MaxSessions in excess of the
number of available file descriptors in sshd (which, at peak, might be
as many as 9*MaxSessions), audit sshd to ensure that it doesn't leak fds
on error paths, and make it fail gracefully on out-of-fd conditions -
sending channel errors instead of than exiting with fatal().
bz#1090; MaxSessions config bits and manpage from junyer AT gmail.com
ok markus@
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[sshd_config]
push the sshd_config bits in, spotted by ajacoutot@
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[servconf.c servconf.h session.c sftp-server.c sftp.h sshd_config]
[sshd_config.5]
add sshd_config ChrootDirectory option to chroot(2) users to a directory
and tweak internal sftp server to work with it (no special files in
chroot required). ok markus@
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[auth2-none.c sshd_config sshd_config.5]
Support "Banner=none" to disable displaying of the pre-login banner;
ok dtucker@ deraadt@
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[sshd_config]
Disable the legacy SSH protocol 1 for new installations via
a configuration override. In the future, we will change the
server's default itself so users who need the legacy protocol
will need to turn it on explicitly
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[servconf.c servconf.h session.c sshd.8 sshd_config sshd_config.5]
Add ForceCommand keyword to sshd_config, equivalent to the "command="
key option, man page entry and example in sshd_config.
Feedback & ok djm@, man page corrections & ok jmc@
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reality. Pointed out by tryponraj at gmail.com.
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[auth-options.c auth-options.h channels.c channels.h clientloop.c]
[misc.c misc.h readconf.c readconf.h scp.c servconf.c servconf.h]
[serverloop.c sftp.c ssh.1 ssh.c ssh_config ssh_config.5 sshconnect.c]
[sshconnect.h sshd.8 sshd_config sshd_config.5]
Add support for tun(4) forwarding over OpenSSH, based on an idea and
initial channel code bits by markus@. This is a simple and easy way to
use OpenSSH for ad hoc virtual private network connections, e.g.
administrative tunnels or secure wireless access. It's based on a new
ssh channel and works similar to the existing TCP forwarding support,
except that it depends on the tun(4) network interface on both ends of
the connection for layer 2 or layer 3 tunneling. This diff also adds
support for LocalCommand in the ssh(1) client.
ok djm@, markus@, jmc@ (manpages), tested and discussed with others
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[kex.c kex.h myproposal.h packet.c packet.h servconf.c session.c]
[sshconnect2.c sshd.c sshd_config sshd_config.5]
add a new compression method that delays compression until the user
has been authenticated successfully and set compression to 'delayed'
for sshd.
this breaks older openssh clients (< 3.5) if they insist on
compression, so you have to re-enable compression in sshd_config.
ok djm@
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[sshd_config]
whitespace nit, from grunk AT pestilenz.org
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[servconf.c servconf.h sshd.c sshd_config sshd_config.5]
bz #898: support AddressFamily in sshd_config. from
peak@argo.troja.mff.cuni.cz; ok deraadt@
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[auth.c auth.h auth1.c auth2.c servconf.c servconf.h sshd_config sshd_config.5]
Add MaxAuthTries sshd config option; ok markus@
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ok dtucker@
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[sshd_config]
KeepAlive has been obsoleted, use TCPKeepAlive instead; markus@ OK
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[servconf.c servconf.h session.c sshd_config]
implement KerberosGetAFSToken server option. ok markus@, beck@
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[servconf.c sshd_config]
GSSAPICleanupCreds -> GSSAPICleanupCredentials
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[auth-krb5.c auth.h auth1.c monitor.c monitor.h monitor_wrap.c]
[monitor_wrap.h readconf.c servconf.c session.c ssh_config.5]
[sshconnect1.c sshd.c sshd_config sshd_config.5]
remove kerberos support from ssh1, since it has been replaced with GSSAPI;
but keep kerberos passwd auth for ssh1 and 2; ok djm, hin, henning, ...
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[auth2.c auth2-gss.c auth.h compat.c compat.h gss-genr.c gss-serv-krb5.c
gss-serv.c monitor.c monitor.h monitor_wrap.c monitor_wrap.h readconf.c
readconf.h servconf.c servconf.h session.c session.h ssh-gss.h
ssh_config.5 sshconnect2.c sshd_config sshd_config.5]
support GSS API user authentication; patches from Simon Wilkinson,
stripped down and tested by Jakob and myself.
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[auth1.c readconf.c readconf.h servconf.c servconf.h ssh.c ssh_config
ssh_config.5 sshconnect1.c sshd.8 sshd.c sshd_config sshd_config.5]
remove RhostsAuthentication; suggested by djm@ before; ok djm@, deraadt@,
fgsch@, miod@, henning@, jakob@ and others
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[sshd_config]
remove AFS; itojun@
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