upstream commit

Add a ProxyJump ssh_config(5) option and corresponding -J
ssh(1) command-line flag to allow simplified indirection through a SSH
bastion or "jump host".

These options construct a proxy command that connects to the
specified jump host(s) (more than one may be specified) and uses
port-forwarding to establish a connection to the next destination.

This codifies the safest way of indirecting connections through SSH
servers and makes it easy to use.

ok markus@

Upstream-ID: fa899cb8b26d889da8f142eb9774c1ea36b04397
7 files changed
tree: 855230b944a0fc2eebdaa4c037f911e28ff21e17
  1. .skipped-commit-ids
  2. CREDITS
  3. INSTALL
  4. LICENCE
  5. Makefile.in
  6. OVERVIEW
  7. PROTOCOL
  8. PROTOCOL.agent
  9. PROTOCOL.certkeys
  10. PROTOCOL.chacha20poly1305
  11. PROTOCOL.key
  12. PROTOCOL.krl
  13. PROTOCOL.mux
  14. README
  15. README.dns
  16. README.platform
  17. README.privsep
  18. README.tun
  19. TODO
  20. aclocal.m4
  21. addrmatch.c
  22. atomicio.c
  23. atomicio.h
  24. audit-bsm.c
  25. audit-linux.c
  26. audit.c
  27. audit.h
  28. auth-bsdauth.c
  29. auth-chall.c
  30. auth-krb5.c
  31. auth-options.c
  32. auth-options.h
  33. auth-pam.c
  34. auth-pam.h
  35. auth-passwd.c
  36. auth-rh-rsa.c
  37. auth-rhosts.c
  38. auth-rsa.c
  39. auth-shadow.c
  40. auth-sia.c
  41. auth-sia.h
  42. auth-skey.c
  43. auth.c
  44. auth.h
  45. auth1.c
  46. auth2-chall.c
  47. auth2-gss.c
  48. auth2-hostbased.c
  49. auth2-kbdint.c
  50. auth2-none.c
  51. auth2-passwd.c
  52. auth2-pubkey.c
  53. auth2.c
  54. authfd.c
  55. authfd.h
  56. authfile.c
  57. authfile.h
  58. bitmap.c
  59. bitmap.h
  60. blocks.c
  61. bufaux.c
  62. bufbn.c
  63. bufec.c
  64. buffer.c
  65. buffer.h
  66. buildpkg.sh.in
  67. canohost.c
  68. canohost.h
  69. chacha.c
  70. chacha.h
  71. channels.c
  72. channels.h
  73. cipher-3des1.c
  74. cipher-aes.c
  75. cipher-aesctr.c
  76. cipher-aesctr.h
  77. cipher-bf1.c
  78. cipher-chachapoly.c
  79. cipher-chachapoly.h
  80. cipher-ctr.c
  81. cipher.c
  82. cipher.h
  83. cleanup.c
  84. clientloop.c
  85. clientloop.h
  86. compat.c
  87. compat.h
  88. config.guess
  89. config.sub
  90. configure.ac
  91. contrib/
  92. crc32.c
  93. crc32.h
  94. crypto_api.h
  95. deattack.c
  96. deattack.h
  97. defines.h
  98. dh.c
  99. dh.h
  100. digest-libc.c
  101. digest-openssl.c
  102. digest.h
  103. dispatch.c
  104. dispatch.h
  105. dns.c
  106. dns.h
  107. ed25519.c
  108. entropy.c
  109. entropy.h
  110. fatal.c
  111. fe25519.c
  112. fe25519.h
  113. fixalgorithms
  114. fixpaths
  115. fixprogs
  116. ge25519.c
  117. ge25519.h
  118. ge25519_base.data
  119. groupaccess.c
  120. groupaccess.h
  121. gss-genr.c
  122. gss-serv-krb5.c
  123. gss-serv.c
  124. hash.c
  125. hmac.c
  126. hmac.h
  127. hostfile.c
  128. hostfile.h
  129. includes.h
  130. install-sh
  131. kex.c
  132. kex.h
  133. kexc25519.c
  134. kexc25519c.c
  135. kexc25519s.c
  136. kexdh.c
  137. kexdhc.c
  138. kexdhs.c
  139. kexecdh.c
  140. kexecdhc.c
  141. kexecdhs.c
  142. kexgex.c
  143. kexgexc.c
  144. kexgexs.c
  145. key.c
  146. key.h
  147. krl.c
  148. krl.h
  149. log.c
  150. log.h
  151. loginrec.c
  152. loginrec.h
  153. logintest.c
  154. mac.c
  155. mac.h
  156. match.c
  157. match.h
  158. md-sha256.c
  159. md5crypt.c
  160. md5crypt.h
  161. mdoc2man.awk
  162. misc.c
  163. misc.h
  164. mkinstalldirs
  165. moduli
  166. moduli.5
  167. moduli.c
  168. monitor.c
  169. monitor.h
  170. monitor_fdpass.c
  171. monitor_fdpass.h
  172. monitor_mm.c
  173. monitor_mm.h
  174. monitor_wrap.c
  175. monitor_wrap.h
  176. msg.c
  177. msg.h
  178. mux.c
  179. myproposal.h
  180. nchan.c
  181. nchan.ms
  182. nchan2.ms
  183. opacket.c
  184. opacket.h
  185. openbsd-compat/
  186. openssh.xml.in
  187. opensshd.init.in
  188. packet.c
  189. packet.h
  190. pathnames.h
  191. pkcs11.h
  192. platform-pledge.c
  193. platform-tracing.c
  194. platform.c
  195. platform.h
  196. poly1305.c
  197. poly1305.h
  198. progressmeter.c
  199. progressmeter.h
  200. readconf.c
  201. readconf.h
  202. readpass.c
  203. regress/
  204. rijndael.c
  205. rijndael.h
  206. rsa.c
  207. rsa.h
  208. sandbox-capsicum.c
  209. sandbox-darwin.c
  210. sandbox-null.c
  211. sandbox-pledge.c
  212. sandbox-rlimit.c
  213. sandbox-seccomp-filter.c
  214. sandbox-solaris.c
  215. sandbox-systrace.c
  216. sc25519.c
  217. sc25519.h
  218. scp.1
  219. scp.c
  220. servconf.c
  221. servconf.h
  222. serverloop.c
  223. serverloop.h
  224. session.c
  225. session.h
  226. sftp-client.c
  227. sftp-client.h
  228. sftp-common.c
  229. sftp-common.h
  230. sftp-glob.c
  231. sftp-server-main.c
  232. sftp-server.8
  233. sftp-server.c
  234. sftp.1
  235. sftp.c
  236. sftp.h
  237. smult_curve25519_ref.c
  238. ssh-add.1
  239. ssh-add.c
  240. ssh-agent.1
  241. ssh-agent.c
  242. ssh-dss.c
  243. ssh-ecdsa.c
  244. ssh-ed25519.c
  245. ssh-gss.h
  246. ssh-keygen.1
  247. ssh-keygen.c
  248. ssh-keyscan.1
  249. ssh-keyscan.c
  250. ssh-keysign.8
  251. ssh-keysign.c
  252. ssh-pkcs11-client.c
  253. ssh-pkcs11-helper.8
  254. ssh-pkcs11-helper.c
  255. ssh-pkcs11.c
  256. ssh-pkcs11.h
  257. ssh-rsa.c
  258. ssh-sandbox.h
  259. ssh.1
  260. ssh.c
  261. ssh.h
  262. ssh1.h
  263. ssh2.h
  264. ssh_api.c
  265. ssh_api.h
  266. ssh_config
  267. ssh_config.5
  268. sshbuf-getput-basic.c
  269. sshbuf-getput-crypto.c
  270. sshbuf-misc.c
  271. sshbuf.c
  272. sshbuf.h
  273. sshconnect.c
  274. sshconnect.h
  275. sshconnect1.c
  276. sshconnect2.c
  277. sshd.8
  278. sshd.c
  279. sshd_config
  280. sshd_config.5
  281. ssherr.c
  282. ssherr.h
  283. sshkey.c
  284. sshkey.h
  285. sshlogin.c
  286. sshlogin.h
  287. sshpty.c
  288. sshpty.h
  289. sshtty.c
  290. survey.sh.in
  291. ttymodes.c
  292. ttymodes.h
  293. uidswap.c
  294. uidswap.h
  295. umac.c
  296. umac.h
  297. utf8.c
  298. utf8.h
  299. uuencode.c
  300. uuencode.h
  301. verify.c
  302. version.h
  303. xmalloc.c
  304. xmalloc.h