If you change the SSH port keep the port number below 1024 as these are priviledged ports that can only be opened by root or processes running as root.
Don't fear the command line!
If you want to set up something to learn how it works, the journey is just as important as the destination.If you prefer a time synchronization method which does not hold open network ports, and you do not need nanosecond accuracy, then you may be interested in replacing NTPdate with Openntpd.Bear in mind that automatic updates apply only to packages sourced from repositories, not self-compiled applications.The /etc/nf file contain all the sysctl settings.Ipv4.icmp_echo_ignore_all 1 To reload sysctl with the latest changes, enter: sudo sysctl -p.The practicality of automatic updates is something you must judge for yourself because it comes down to what you do with your Linode.
This does not disable the protocol system-wide, it is only for the SSH daemon.
Note that youll need to update your firewall or EC2 security rules accordingly.
Finally, lets run these checkers weekly instead of daily, because daily is too annoying: mv /etc/cron.
Use the option: AddressFamily inet to listen only on IPv4.
Restrict Apache Information Leakage.Uninstall the Listening Services How to remove the offending packages will differ depending on your distributions package manager.To get the same report yourself, create a file called /etc/cron.Analyse system LOG files, logWatch, apparmor - Application Armor Audit your system security - Tiger and Tripwire Requirements: Ubuntu.04 LTS or later server with a standard lamp stack installed.This guide is intended as a relatively easy step by step guide to: Harden new digital age pdf the security on an Ubuntu.04 LTS server by installing and configuring the following: Install and configure, firewall - ufw, secure shared memory - fstab, sSH - Key based login, disable root.Protect su by limiting access only to admin group.It generally seems like a sensible idea to make sunday suspense all new episodes sure that only users in the sudo group are able to run the su command in order to act as (or become) root: dpkg-statoverride -update -add root sudo 4750 /bin/su.We have a library of documentation to assist you with a variety of topics ranging from migration from shared hosting to enabling two-factor authentication to hosting a website.Youll then be asked to assign the user a password: 1 adduser example_user, add the user to the sudo group so youll have administrative privileges: 1 adduser example_user sudo, after creating your limited user, disconnect from your Linode: 1 exit, log back in as your.Logwatch is a customizable log analysis system.