By default, changes in Binaries and Libraries directories are checked. Read through the file to acquaint yourself with aide. Open up /etc/default/aide with your favourite editor to change who to send its reports to: To install aide on a debian based system: The snapshot is periodically checked against the current hash of the file and any variations alerted on.įor some " aide vs tripwire" notes, see Linux applications: Intrusion detection, and for an example install of tripwire on a server, see Linux server security: Installing intrusion detection. FIAs usually take a hash of all files to be monitored using an algorithm like MD5. If it detects changes to those files, then it alerts the administrator that an unauthorised access or change has taken place. A FIA monitors the integrity and state of the files and objects on your machine. To detect changes like that in your system, you can set up intrusion detection with for example aide or tripwire.Īide and tripwire are both File Integrity Agents (FIAs). For example, ls can be replaced with an ls version that won't show the files they created, netstat will not show connections that are used by the intruder, and ps will hide processes the intruder runs. To do so, they are most likely to replace some common binaries such as ls, netstat or ps with versions that will not make their presence visible. ![]() When intruders penetrate your system there is a great chance that they will want to make their presence as quiet as possible. You can use a firewall, keep your system softwares up to date, stop all unrequired services, use long and difficult passwords and password managers, and more (see below), there is still a chance that some intruder might get into your system. Choose "I think I'll configure my account later.": The wizard of icedove (thunderbird) does not allow directly for setting up local mail adresses. Next is setting up an account in a mail client. If you don't like exim, install postfix (if you install the one, the other is uninstalled). Developers fix most security issues quickly, but because it has the most number of users, it is still the biggest target for hackers.ĭebian with MATE comes with the exim mailserver installed. ![]() It is easy to configure but had the most security loopholes, partly because it was designed long before hackers started attacking email systems.
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