06-18-2009
try this command:
sudo cat /var/log/authlog | grep Invalid
if you've had your server open for any length of time, a large number of attempted logins will scroll by. Here's how to protect against these attacks ever succeeding:
groupadd ssh
vi /etc/group (and add yourself to the ssh group)
vi /etc/ssh/sshd_config
AllowGroups: ssh
PasswordAuthentication no
now add your public key your ~/.ssh/authorized_keys file
restart the ssh server:
sudo su -
(hit return to accept the default terminal selection)
pkill sshd && /usr/sbin/sshd
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LEARN ABOUT DEBIAN
gesftpserver
gesftpserver(8) System Manager's Manual gesftpserver(8)
NAME
gesftpserver - Green End SFTP Server
SYNOPSIS
/usr/lib/gesftpserver [OPTIONS]
DESCRIPTION
gesftpserver implements the SFTP protocol. It is normally run as an SSH subsystem but can be run in other contexts if necessary.
CONFIGURING OPENSSH
By default, OpenSSH will use its native SFTP server in response to requests for the SFTP subsystem. To use gesftpserver instead, add a
suitable Subsystem command to sshd_config (and remove the existing one if present). For example:
Subsystem sftp /usr/lib/gesftpserver
IMPLEMENTATION DETAILS
gesftpserver supports up to version 6 of the SFTP protocol and the following extensions:
newline
Reports the server's newline convention to the client.
space-available
Equivalent to df(1).
supported
v5 capability details
supported2
v6 capability details
text-seek
Used for resuming text file downloads.
vendor-id
Reports server name and version to client. gesftpserver reports a vendor of "Green End" and a server name of "Green End SFTP
Server".
versions
Lists available versions.
version-select
Select version.
posix-rename@openssh.org
Provides POSIX rename semantics even in pre-v5 SFTP.
SEE ALSO
sshd_config(5)
gesftpserver(8)