disallow pseudo terminal in ssh

Some Oracle documentation wants you to setup ssh with no password and no passphrase. Configuring ssh This is not really something your security admin will like. First, using DSA, which is deprecated and disabled by default in OpenSSH 7.0, is a pretty dump instruction OpenSSH 7.0 and greater similarly disable the ssh-dss (DSA) public key […]

This system is for the use of authorized users only.

How to bypass the login banners? There is actually more than one banner to bypass. One of the them is the message of the day banner, commonly located in /etc/motd. Typically friendly, example in AIX **************************************************************************** * * * * * Welcome to AIX Version 6.1! * * * * * * Please see the […]

to ftp or to sftp

Ftp is seen as an old-time unsecure protocol. Many shops nowadays have switched or are switching to sftp. I will try to point out some differences : Compatibility: none. the protocol is completly different. Multiple graphical clients however do support both mode. But the basic “ftp” client will not work with sftp. Ascii mode: only […]