diff options
Diffstat (limited to 'ssh-keyscan.1')
| -rw-r--r-- | ssh-keyscan.1 | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/ssh-keyscan.1 b/ssh-keyscan.1 index 2f33ddf2..f6596c48 100644 --- a/ssh-keyscan.1 +++ b/ssh-keyscan.1 @@ -1,4 +1,4 @@ -.\" $OpenBSD: ssh-keyscan.1,v 1.14 2002/02/13 08:33:47 mpech Exp $ +.\" $OpenBSD: ssh-keyscan.1,v 1.15 2003/03/28 10:11:43 jmc Exp $ .\" .\" Copyright 1995, 1996 by David Mazieres <dm@lcs.mit.edu>. .\" @@ -14,6 +14,7 @@ .Nd gather ssh public keys .Sh SYNOPSIS .Nm ssh-keyscan +.Bk -words .Op Fl v46 .Op Fl p Ar port .Op Fl T Ar timeout @@ -21,10 +22,12 @@ .Op Fl f Ar file .Op Ar host | addrlist namelist .Op Ar ... +.Ek .Sh DESCRIPTION .Nm is a utility for gathering the public ssh host keys of a number of -hosts. It was designed to aid in building and verifying +hosts. +It was designed to aid in building and verifying .Pa ssh_known_hosts files. .Nm @@ -33,9 +36,11 @@ scripts. .Pp .Nm uses non-blocking socket I/O to contact as many hosts as possible in -parallel, so it is very efficient. The keys from a domain of 1,000 +parallel, so it is very efficient. +The keys from a domain of 1,000 hosts can be collected in tens of seconds, even when some of those -hosts are down or do not run ssh. For scanning, one does not need +hosts are down or do not run ssh. +For scanning, one does not need login access to the machines that are being scanned, nor does the scanning process involve any encryption. .Pp @@ -44,12 +49,13 @@ The options are as follows: .It Fl p Ar port Port to connect to on the remote host. .It Fl T Ar timeout -Set the timeout for connection attempts. If +Set the timeout for connection attempts. +If .Pa timeout seconds have elapsed since a connection was initiated to a host or since the last time anything was read from that host, then the connection is -closed and the host in question considered unavailable. Default is 5 -seconds. +closed and the host in question considered unavailable. +Default is 5 seconds. .It Fl t Ar type Specifies the type of the key to fetch from the scanned hosts. The possible values are |