Users that try and fail to log in to your system leave a record in the system logs. This is how to find out what time this was and which user they attempted to log in as. The /var/log/auth.log file is the one that contains the login records. All successful…
Read MoreInstalling and setting up SSH on Kali Linux 2019 is very easy. This enables an SSH connection from Bitvise SSH Client into a VMWare instance of Kali Linux. Firstly, install the SSH service. root@kali:~# apt install sshroot@kali:~# apt install ssh Then, once it is installed, start the SSH service on…
Read MoreUsing SSH is a very good way to connect to another computer that is running Linux, it is also possible to mount a folder on the remote machine over a network and access it on your local computer. This is a very good way to access remote files. Firstly, install…
Read MoreThere is an alternative to SSH for accessing a remote Linux machine, this is RSH. This works on machines that have SSH enabled, but the connection is not encrypted as it is with SSH. Connect to a remote server like this. The -p parameter defines the port used to connect…
Read MoreThe sftp utility for Linux allows copying files from a remote Linux machine, or sending them to one, this makes working with a machine over SSH very easy. Firstly, connect to the machine like this. deusexmachina:~ jason$ sftp [email protected] [email protected]’s password: Connected to 192.168.1.4.deusexmachina:~ jason$ sftp [email protected] [email protected]’s password: Connected…
Read MoreSSH is a great way to connect to a remote Linux server over a network. This is how to use SSH easily yourself. Firstly, install SSH on the remote machine to allow remote connections if it is a server you are setting up. sudo apt install sshsudo apt install ssh…
Read MoreHow to change your Ubuntu password as a normal user. jason@Yog-Sothoth:~$ passwd Changing password for jason. (current) UNIX password: Enter new UNIX password:jason@Yog-Sothoth:~$ passwd Changing password for jason. (current) UNIX password: Enter new UNIX password: Just enter you current password and then enter a new one twice. It is that…
Read MoreThis is how I get the IP information from a Ubiquity wireless Nanostation. XM.v5.5.3# ifconfig br0 br0 Link encap:Ethernet HWaddr DC:9F:DB:42:59:2B inet addr:192.168.1.20 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::de9f:dbff:fe42:592b/64 Scope:Link UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1 RX packets:921 errors:0 dropped:0 overruns:0 frame:0 TX packets:501 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0…
Read MoreIt is very simple to show a banner to your users, that explains the terms of use for an SSH connection upon the user reaching a login prompt. Firstly, create a file named info in the /etc/ssh directory. sudo touch /etc/ssh/infosudo touch /etc/ssh/info Then put this in it. *************************************************************************** NOTICE…
Read MoreYour Linux user account details may be seen with the finger command, i.e finger jason. But the user can add more information to this as well. Create a file in your home directory named .plan and put this into it. ***************************************************************************^M NOTICE TO USERS This computer system is…
Read MoreTo open an xterm window over the network from another computer, use this command. This will open an SSH connection to another machine. Once the password is given, it will open a rxvt window which will appear on your machine and enable you to issue commands. jason@Yog-Sothoth:~$ ssh -YC [email protected]…
Read MoreI used this command to crack a Linux SSH account with hydra. hydra -l trump -P rockyou.txt ssh://192.168.1.2hydra -l trump -P rockyou.txt ssh://192.168.1.2 And this is the output I got once I managed to crack the user account over SSH. This is why you have fail2ban and other protections against…
Read MoreTo setup an SSH login on your Linux machine that does not require a password and uses SSH host keys instead, follow this simple guide. Firstly, generate a set of keys for your SSH login. ubuntu ~/Documents $ ssh-keygen Generating public/private rsa key pair. Enter file in which to save…
Read MoreUseful Android SSH and terminal apps Juice SSH. This is a useful app for Android that allows connecting to Linux machines with SSH. Termux. This is a terminal emulator app for Android that is a fully featured Linux shell. Very good for practicing Linux shell commands on Android. There is…
Read MoreThis screenshot from a Mr Robot episode shows setup instructions for the nginx web server, the TOR browser and what appears to be an overall plan for hosting an onion website on the TOR network. There are instructions for installing the GPG keys for the TOR packages. But the root…
Read MoreCopying a file with sftp from one UNIX machine to another is very easy. The command below uses the SSH protocol and initiates a connection to the remote PC. ubuntu ~ $ sftp -P 443 [email protected] ~ $ sftp -P 443 [email protected] Press ENTER and type your password. The user…
Read MoreLinux command line in Mr Robot. This directory listing is showing a few files under the /opt/2/task/2/fd1info directory. The fsociety file is the one he was looking for. This file is only 4096 bytes in size, so does not contain too much juicy information. Or does it? The screenshot below,…
Read MoreThe hydra brute forcing program allows a user to attack a login trying many passwords until the correct login information is discovered. I have tried this on localhost and I managed to crack the password for my SSH login on my laptop. I used rockyou.txt downloaded from this website and…
Read MoreAmazon Web Services is a very powerful way to run a virtualized server in the cloud, but there are some tips that will help you greatly when deploying a server for the first time. SSH access is one. Changing the SSH port from 22 to 443 in the /etc/ssh/sshd_config file…
Read MoreThis is the sample command I am using to download my OpenVPN keys from a remote VPN server to allow me to setup a local connection. And to backup the keys safely. [1]homer@deusexmachina ~ $ scp -i Goku.pem -P 443 [email protected]:/home/ubuntu/easy-rsa/keys/*.* /home/homer/vpn/ 01.pem 100% 5589 5.5KB/s 00:00 ca.crt 100% 1736…
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