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Document that the TERM environment variable is not
subject to SendEnv and AcceptEnv. bz#2386, based loosely on a patch from
jjelen at redhat, help and ok jmc@
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Make sshd default to PermitRootLogin=no; ok deraadt@
rpe@
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Document "none" for PidFile XAuthLocation
TrustedUserCAKeys and RevokedKeys. bz#2382, feedback from jmc@, ok djm@
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sort options useable under Match case-insensitively; prodded
jmc@
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more options that are available under Match; bz#2353 reported
by calestyo AT scientia.net
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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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heirarchy -> hierarchy;
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Provide a warning about chroot misuses (which sadly, seem
to have become quite popular because shiny). sshd cannot detect/manage/do
anything about these cases, best we can do is warn in the right spot in the
man page. ok markus
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add sshd_config HostbasedAcceptedKeyTypes and
PubkeyAcceptedKeyTypes options to allow sshd to control what public key types
will be accepted. Currently defaults to all. Feedback & ok markus@
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mention ssh -Q feature to list supported { MAC, cipher,
KEX, key } algorithms in more places and include the query string used to
list the relevant information; bz#2288
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tweak previous;
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correct description of what will happen when a
AuthorizedKeysCommand is specified but AuthorizedKeysCommandUser is not (sshd
will refuse to start)
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remember which public keys have been used for
authentication and refuse to accept previously-used keys.
This allows AuthenticationMethods=publickey,publickey to require
that users authenticate using two _different_ pubkeys.
ok markus@
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tweak previous;
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Add FingerprintHash option to control algorithm used for
key fingerprints. Default changes from MD5 to SHA256 and format from hex to
base64.
Feedback and ok naddy@ markus@
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revert chunk I didn't mean to commit yet; via jmc@
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mention AuthorizedKeysCommandUser must be set for
AuthorizedKeysCommand to be run; bz#2287
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restore word zapped in previous, and remove some useless
"No" macros;
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/dev/random has created the same effect as /dev/arandom
(and /dev/urandom) for quite some time. Mop up the last few, by using
/dev/random where we actually want it, or not even mentioning arandom where
it is irrelevant.
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mention permissions on tun(4) devices in PermitTunnel
documentation; bz#2273
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typo.
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[sftp-server.8 sshd_config.5]
some systems no longer need /dev/log;
issue noticed by jirib;
ok deraadt
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[PROTOCOL auth-options.c auth-passwd.c auth-rh-rsa.c auth-rhosts.c]
[auth-rsa.c auth.c auth1.c auth2-hostbased.c auth2-kbdint.c auth2-none.c]
[auth2-passwd.c auth2-pubkey.c auth2.c canohost.c channels.c channels.h]
[clientloop.c misc.c misc.h monitor.c mux.c packet.c readconf.c]
[readconf.h servconf.c servconf.h serverloop.c session.c ssh-agent.c]
[ssh.c ssh_config.5 sshconnect.c sshconnect1.c sshconnect2.c sshd.c]
[sshd_config.5 sshlogin.c]
Add support for Unix domain socket forwarding. A remote TCP port
may be forwarded to a local Unix domain socket and vice versa or
both ends may be a Unix domain socket. This is a reimplementation
of the streamlocal patches by William Ahern from:
http://www.25thandclement.com/~william/projects/streamlocal.html
OK djm@ markus@
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[servconf.c servconf.h session.c sshd.8 sshd_config.5]
Add a sshd_config PermitUserRC option to control whether ~/.ssh/rc is
executed, mirroring the no-user-rc authorized_keys option;
bz#2160; ok markus@
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[ssh_config.5 sshd_config.5]
sync available and default algorithms, improve algorithm list formatting
help from jmc@ and schwarze@, ok deraadt@
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[sshd_config.5]
bz#2184 clarify behaviour of a keyword that appears in multiple
matching Match blocks; ok dtucker@
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[sshd_config.5]
document kbdinteractiveauthentication;
requested From: Ross L Richardson
dtucker/markus helped explain its workings;
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[sshd_config.5]
Use a literal for the default value of KEXAlgorithms. ok deraadt jmc
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[ssh-add.1 ssh-agent.1 ssh-keygen.1 ssh-keyscan.1 ssh-keysign.8 ssh.1]
[ssh_config.5 sshd.8 sshd_config.5]
add missing mentions of ed25519; ok djm@
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[ssh_config.5 sshd_config.5]
no need for .Pp before displays;
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[Makefile.in PROTOCOL PROTOCOL.chacha20poly1305 authfile.c chacha.c]
[chacha.h cipher-chachapoly.c cipher-chachapoly.h cipher.c cipher.h]
[dh.c myproposal.h packet.c poly1305.c poly1305.h servconf.c ssh.1]
[ssh.c ssh_config.5 sshd_config.5] Add a new protocol 2 transport
cipher "chacha20-poly1305@openssh.com" that combines Daniel
Bernstein's ChaCha20 stream cipher and Poly1305 MAC to build an
authenticated encryption mode.
Inspired by and similar to Adam Langley's proposal for TLS:
http://tools.ietf.org/html/draft-agl-tls-chacha20poly1305-03
but differs in layout used for the MAC calculation and the use of a
second ChaCha20 instance to separately encrypt packet lengths.
Details are in the PROTOCOL.chacha20poly1305 file.
Feedback markus@, naddy@; manpage bits Loganden Velvindron @ AfriNIC
ok markus@ naddy@
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[ssh_config.5 sshd_config.5]
the default kex is now curve25519-sha256@libssh.org
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[sshd_config.5]
pty(4), not pty(7);
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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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[readconf.c servconf.c ssh_config.5 sshd_config.5]
Disallow empty Match statements and add "Match all" which matches
everything. ok djm, man page help jmc@
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[auth.h kex.h kexdhs.c kexecdhs.c kexgexs.c monitor.c servconf.c]
[servconf.h session.c sshd.c sshd_config.5]
add ssh-agent(1) support to sshd(8); allows encrypted hostkeys,
or hostkeys on smartcards; most of the work by Zev Weiss; bz #1974
ok djm@
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[ssh-keygen.1 ssh.1 ssh_config.5 sshd.8 sshd_config.5]
do not use Sx for sections outwith the man page - ingo informs me that
stuff like html will render with broken links;
issue reported by Eric S. Raymond, via djm
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[sshd_config.5]
oops! avoid Xr to self;
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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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[sshd_config.5]
document the requirment that the AuthorizedKeysCommand be owned by root;
ok dtucker@ markus@
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[auth.h auth2-chall.c auth2.c monitor.c sshd_config.5]
add submethod support to AuthenticationMethods; ok and freedback djm@
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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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[sshd_config.5]
tweak previous;
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[auth.c key.c key.h ssh-keygen.1 ssh-keygen.c sshd_config.5]
[krl.c krl.h PROTOCOL.krl]
add support for Key Revocation Lists (KRLs). These are a compact way to
represent lists of revoked keys and certificates, taking as little as
a single bit of incremental cost to revoke a certificate by serial number.
KRLs are loaded via the existing RevokedKeys sshd_config option.
feedback and ok markus@
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[PROTOCOL authfile.c cipher.c cipher.h kex.c kex.h monitor_wrap.c]
[myproposal.h packet.c ssh_config.5 sshd_config.5]
support AES-GCM as defined in RFC 5647 (but with simpler KEX handling)
ok and feedback djm@
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[PROTOCOL authfile.c cipher.c cipher.h kex.h mac.c myproposal.h]
[packet.c ssh_config.5 sshd_config.5]
add encrypt-then-mac (EtM) modes to openssh by defining new mac algorithms
that change the packet format and compute the MAC over the encrypted
message (including the packet size) instead of the plaintext data;
these EtM modes are considered more secure and used by default.
feedback and ok djm@
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[ssh-add.1 sshd_config.5]
tweak previous;
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[auth-options.c channels.c servconf.c servconf.h serverloop.c session.c]
[sshd_config.5]
make AllowTcpForwarding accept "local" and "remote" in addition to its
current "yes"/"no" to allow the server to specify whether just local or
remote TCP forwarding is enabled. ok markus@
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[auth.h auth1.c auth2.c monitor.c servconf.c servconf.h sshd.c]
[sshd_config.5]
Support multiple required authentication via an AuthenticationMethods
option. This option lists one or more comma-separated lists of
authentication method names. Successful completion of all the methods in
any list is required for authentication to complete;
feedback and ok markus@
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