̾??

ssh-keyscan — ssh ????????????????

????

ssh-keyscan [-v46] [-p ?ݡ????ֹ?] [-T ?????ॢ?????ÿ?] [-t ???μ???] [-f ?ե?????̾] [?ۥ???̾ | ???ɥ쥹?ꥹ?? ?ۥ???̾?ꥹ??] [...]

????

ssh-keyscan ??ʣ???Υۥ??Ȥ??? ssh ?ѤΥۥ??ȸ??????????????뤿???? ?桼?ƥ????ƥ??Ǥ????????? ssh_known_hosts ?ե??????????ۤ??????ڤ????Τ???Ω?Ĥ褦???????Ƥ??ޤ??? ssh-keyscan ?ϥ????륹?????ץȤ??뤤?? perl ???????ץȤ????Ȥ??Τ?Ŭ?????? ?Ǿ??¤Υ??󥿥ե????????????Ƥ??ޤ???

ssh-keyscan ?ϥΥ??֥??å??󥰥????å? I/O ???Ȥ????ʤ??٤?¿???Υۥ??Ȥ? ?????˥??????????ޤ??????Τ??ᤳ?????????˸?ΨŪ?Ǥ??? 1000 ???ۤɤΥۥ??Ȥ????ʤ??ɥᥤ???θ????????äǽ????Ƥ??ޤ??ޤ??? ???Ȥ??????Ĥ??Υۥ??Ȥ? ssh ?????äƤ??ʤ??ä??ꡢ?ۥ??Ȥ??????󤷤Ƥ????ꤷ?Ƥ⡢?Ǥ??? ?????????Τ??????????ޥ????˥??????󤹤?ɬ?פϤ????ޤ??󡣤ޤ??? ???????󤹤??Ȥ??˰Ź????Ѥ???ɬ?פ⤢???ޤ?????

???ץ??????ϰʲ??ΤȤ????Ǥ? :

-p ?ݡ????ֹ?

??³???????⡼?ȥۥ??Ⱦ??Υݡ??Ȥ????ꤷ?ޤ???

-T

??³?׵᤬?????ॢ???Ȥ????ޤǤ??ÿ??????ꤷ?ޤ??? ?????ۥ??Ȥ???³?????ߤƤ??顢???뤤?ϺǸ??ˤ??Υۥ??Ȥ??鲿?? ???????Ƥ??? timeout ?ä??в᤹???Ȥ?????³???Ĥ????졢?????Υۥ??Ȥϻ?????ǽ?Ȥ??? ǧ???????ޤ????ǥե????ȤǤ? 5 ?äǤ???

-t ???μ???

?ۥ??Ȥ??????????븰?μ????????ꤷ?ޤ??? ?Ȥꤦ???ͤϡ??ץ??ȥ??? ?С??????? 1 ?? “rsa1” ?ȡ??ץ??ȥ??? ?С??????? 2 ?? “rsa” ???뤤?? “dsa” ?Ǥ??? ʣ?????ͤ????ꤹ???Ȥ??ϡ??????ޤǶ??ڤäƤ????????? ?ǥե????ȤǤϤ????? “rsa1” ?ˤʤäƤ??ޤ???

-f ?ե?????̾

???Υե????뤫?顢?ۥ???̾???뤤?? ???ɥ쥹?ꥹ?? ?ۥ???̾?ꥹ?? ???Ȥ??ɤ߹??ߤޤ????񼰤? 1??1???ܤǤ????????Ȥ??? - ?????ꤵ?줿???硢 ssh-keyscan ??ɸ?????Ϥ????ۥ???̾???뤤?? ???ɥ쥹?ꥹ?? ?ۥ???̾?ꥹ?? ???Ȥ??ɤ߹??ߤޤ???

-v

??Ĺɽ???⡼?ɡ? ssh-keyscan ???ʹ????ΥǥХå????å???????ɽ???????褦?ˤ??ޤ???

-4

ssh-keyscan ?? IPv4 ???ɥ쥹?Τߤ??Ȥ??褦???????ޤ???

-6

ssh-keyscan ?? IPv6 ???ɥ쥹?Τߤ??Ȥ??褦???????ޤ???

?????????ƥ?

ssh-keyscan ???Ĥ??äơ????򸡾ڤ????? ssh_known_hosts ?ե??????????ۤ??????硢 (?ʤꤹ?ޤ?) ???????Ф???̵?????ˤʤ??ޤ??? ???äݤ??????Ȥ??Υ????????ƥ????ǥ뤬???Τ褦?ʴ????? ?Ϥ????Ǥ??????硢???٤??????? ssh_known_hosts ?????äƤ??ޤ??С? ssh-keyscan ?Ϥ????ʸ??Ρ????⤵?줿???ե??????? man in the middle ?????? ???Τ????Τ˻Ȥ??ޤ???

??Ϣ?ե?????

???Ϸ???:

1.2.3.4,1.2.4.4 name.my.domain,name,n.my.domain,n,1.2.3.4,1.2.4.4

rsa1 ???ν??Ϸ???:

?ۥ??Ȥ??뤤?ϥۥ???̾?Υꥹ?? ?ӥåȿ? ?٤??ؿ? ????

rsa ?????? dsa ???ν??Ϸ???:

?ۥ??Ȥ??뤤?ϥۥ???̾?Υꥹ?? ???μ??? base64???󥳡??ɤ??줿??

keytype ???ͤ? “ssh-rsa” ???뤤?? “ssh-dss” ?Τɤ??餫?Ǥ???

/etc/ssh/ssh_known_hosts

??????

hostname ?ǻ??ꤵ?????ޥ????? rsa1 ?ۥ??ȸ???ɽ?????? :

$ ssh-keyscan hostname

?ե????? ssh_hosts ?ˤ????ۥ??ȤΤ????????????ۥ??ȡ????뤤?ϥ????Ȥ??줿 ssh_known_hosts ?ե??????ˤ??????Τȸ??????äƤ????ۥ??Ȥ򸫤Ĥ??? :

$ ssh-keyscan -t rsa,dsa -f ssh_hosts | \
	sort -u - ssh_known_hosts | diff ssh_known_hosts -

??Ϣ????

ssh(1), sshd(8)

????

David Mazieres ⟨dm@lcs.mit.edu⟩ ???ǽ??ΥС??????????񤭡? Wayne Davison ⟨wayned@users.sourceforge.net⟩ ???ץ??ȥ??? ?С??????? 2 ?Υ??ݡ??Ȥ??ɲä??ޤ?????

?Х?

??????¦?ΥС????????? 2.9 ?????Ť??ȡ? ???Υץ????????ϥ??????󤷤????٤ƤΥޥ????Υ??󥽡??????? "Connection closed by remote host" ?Υ??å????????Ĥ??ޤ??? ?????ϡ????Υץ??????ब ssh ?ѤΥݡ??Ȥ???³???????ȡ? ?????????ɤߤ????Ǥ???????³???ڤäƤ??ޤ??????Ǥ???

???ܸ???

???? ʹ?? (yusuke at cs . nyu . edu) 2003/4/17 (for 3.6.1p1)

???ޥ˥奢???ڡ????ϻ??Τ????դˤ??? FreeBSD ?????˽??????ä??? FreeBSD ???ܸ??ޥ˥奢???˼?Ͽ?????Ƥ????????Ƥ??ޤ??? ?????ˤĤ??ƤΤ??ո???????Ŧ???????ޤ????? FreeBSD jpman ?ץ????????? ⟨man-jp@jp.FreeBSD.org⟩ ?ޤ??Ͽ????? (yusuke at cs . nyu . edu) ?ޤǤ????꤯????????