diff options
author | Colin Watson <cjwatson@debian.org> | 2014-10-07 13:33:15 +0100 |
---|---|---|
committer | Colin Watson <cjwatson@debian.org> | 2014-10-07 14:27:30 +0100 |
commit | f0b009aea83e9ff3a50be30f51012099a5143c16 (patch) | |
tree | 3825e6f7e3b7ea4481d06ed89aba9a7a95150df5 /ssh.1 | |
parent | 47f0bad4330b16ec3bad870fcf9839c196e42c12 (diff) | |
parent | 762c062828f5a8f6ed189ed6e44ad38fd92f8b36 (diff) |
Merge 6.7p1.
* New upstream release (http://www.openssh.com/txt/release-6.7):
- sshd(8): The default set of ciphers and MACs has been altered to
remove unsafe algorithms. In particular, CBC ciphers and arcfour* are
disabled by default. The full set of algorithms remains available if
configured explicitly via the Ciphers and MACs sshd_config options.
- ssh(1), sshd(8): 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 (closes: #236718).
- ssh(1), ssh-keygen(1): Add support for SSHFP DNS records for ED25519
key types.
- sftp(1): Allow resumption of interrupted uploads.
- ssh(1): When rekeying, skip file/DNS lookups of the hostkey if it is
the same as the one sent during initial key exchange.
- sshd(8): Allow explicit ::1 and 127.0.0.1 forwarding bind addresses
when GatewayPorts=no; allows client to choose address family.
- sshd(8): Add a sshd_config PermitUserRC option to control whether
~/.ssh/rc is executed, mirroring the no-user-rc authorized_keys
option.
- ssh(1): Add a %C escape sequence for LocalCommand and ControlPath that
expands to a unique identifer based on a hash of the tuple of (local
host, remote user, hostname, port). Helps avoid exceeding miserly
pathname limits for Unix domain sockets in multiplexing control paths.
- sshd(8): Make the "Too many authentication failures" message include
the user, source address, port and protocol in a format similar to the
authentication success / failure messages.
- Use CLOCK_BOOTTIME in preference to CLOCK_MONOTONIC when it is
available. It considers time spent suspended, thereby ensuring
timeouts (e.g. for expiring agent keys) fire correctly (closes:
#734553).
- Use prctl() to prevent sftp-server from accessing
/proc/self/{mem,maps}.
* Restore TCP wrappers support, removed upstream in 6.7. It is true that
dropping this reduces preauth attack surface in sshd. On the other
hand, this support seems to be quite widely used, and abruptly dropping
it (from the perspective of users who don't read openssh-unix-dev) could
easily cause more serious problems in practice. It's not entirely clear
what the right long-term answer for Debian is, but it at least probably
doesn't involve dropping this feature shortly before a freeze.
* Replace patch to disable OpenSSL version check with an updated version
of Kurt Roeckx's patch from #732940 to just avoid checking the status
field.
Diffstat (limited to 'ssh.1')
-rw-r--r-- | ssh.1 | 35 |
1 files changed, 12 insertions, 23 deletions
@@ -33,8 +33,8 @@ | |||
33 | .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | 33 | .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
34 | .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 34 | .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
35 | .\" | 35 | .\" |
36 | .\" $OpenBSD: ssh.1,v 1.343 2013/12/07 11:58:46 naddy Exp $ | 36 | .\" $OpenBSD: ssh.1,v 1.348 2014/07/24 22:57:10 millert Exp $ |
37 | .Dd $Mdocdate: December 7 2013 $ | 37 | .Dd $Mdocdate: July 24 2014 $ |
38 | .Dt SSH 1 | 38 | .Dt SSH 1 |
39 | .Os | 39 | .Os |
40 | .Sh NAME | 40 | .Sh NAME |
@@ -73,8 +73,9 @@ executing commands on a remote machine. | |||
73 | It is intended to replace rlogin and rsh, | 73 | It is intended to replace rlogin and rsh, |
74 | and provide secure encrypted communications between | 74 | and provide secure encrypted communications between |
75 | two untrusted hosts over an insecure network. | 75 | two untrusted hosts over an insecure network. |
76 | X11 connections and arbitrary TCP ports | 76 | X11 connections, arbitrary TCP ports and |
77 | can also be forwarded over the secure channel. | 77 | .Ux Ns -domain |
78 | sockets can also be forwarded over the secure channel. | ||
78 | .Pp | 79 | .Pp |
79 | .Nm | 80 | .Nm |
80 | connects and logs into the specified | 81 | connects and logs into the specified |
@@ -131,7 +132,9 @@ of the connection. | |||
131 | Only useful on systems with more than one address. | 132 | Only useful on systems with more than one address. |
132 | .It Fl C | 133 | .It Fl C |
133 | Requests compression of all data (including stdin, stdout, stderr, and | 134 | Requests compression of all data (including stdin, stdout, stderr, and |
134 | data for forwarded X11 and TCP connections). | 135 | data for forwarded X11, TCP and |
136 | .Ux Ns -domain | ||
137 | connections). | ||
135 | The compression algorithm is the same used by | 138 | The compression algorithm is the same used by |
136 | .Xr gzip 1 , | 139 | .Xr gzip 1 , |
137 | and the | 140 | and the |
@@ -154,23 +157,6 @@ The supported values are | |||
154 | .Dq blowfish , | 157 | .Dq blowfish , |
155 | and | 158 | and |
156 | .Dq des . | 159 | .Dq des . |
157 | .Ar 3des | ||
158 | (triple-des) is an encrypt-decrypt-encrypt triple with three different keys. | ||
159 | It is believed to be secure. | ||
160 | .Ar blowfish | ||
161 | is a fast block cipher; it appears very secure and is much faster than | ||
162 | .Ar 3des . | ||
163 | .Ar des | ||
164 | is only supported in the | ||
165 | .Nm | ||
166 | client for interoperability with legacy protocol 1 implementations | ||
167 | that do not support the | ||
168 | .Ar 3des | ||
169 | cipher. | ||
170 | Its use is strongly discouraged due to cryptographic weaknesses. | ||
171 | The default is | ||
172 | .Dq 3des . | ||
173 | .Pp | ||
174 | For protocol version 2, | 160 | For protocol version 2, |
175 | .Ar cipher_spec | 161 | .Ar cipher_spec |
176 | is a comma-separated list of ciphers | 162 | is a comma-separated list of ciphers |
@@ -267,6 +253,8 @@ will wait for all remote port forwards to be successfully established | |||
267 | before placing itself in the background. | 253 | before placing itself in the background. |
268 | .It Fl g | 254 | .It Fl g |
269 | Allows remote hosts to connect to local forwarded ports. | 255 | Allows remote hosts to connect to local forwarded ports. |
256 | If used on a multiplexed connection, then this option must be specified | ||
257 | on the master process. | ||
270 | .It Fl I Ar pkcs11 | 258 | .It Fl I Ar pkcs11 |
271 | Specify the PKCS#11 shared library | 259 | Specify the PKCS#11 shared library |
272 | .Nm | 260 | .Nm |
@@ -481,6 +469,8 @@ For full details of the options listed below, and their possible values, see | |||
481 | .It SendEnv | 469 | .It SendEnv |
482 | .It ServerAliveInterval | 470 | .It ServerAliveInterval |
483 | .It ServerAliveCountMax | 471 | .It ServerAliveCountMax |
472 | .It StreamLocalBindMask | ||
473 | .It StreamLocalBindUnlink | ||
484 | .It StrictHostKeyChecking | 474 | .It StrictHostKeyChecking |
485 | .It TCPKeepAlive | 475 | .It TCPKeepAlive |
486 | .It Tunnel | 476 | .It Tunnel |
@@ -1472,7 +1462,6 @@ if an error occurred. | |||
1472 | .Xr ssh-keygen 1 , | 1462 | .Xr ssh-keygen 1 , |
1473 | .Xr ssh-keyscan 1 , | 1463 | .Xr ssh-keyscan 1 , |
1474 | .Xr tun 4 , | 1464 | .Xr tun 4 , |
1475 | .Xr hosts.equiv 5 , | ||
1476 | .Xr ssh_config 5 , | 1465 | .Xr ssh_config 5 , |
1477 | .Xr ssh-keysign 8 , | 1466 | .Xr ssh-keysign 8 , |
1478 | .Xr sshd 8 | 1467 | .Xr sshd 8 |