Feb 28 2005
There are several worms which attempt to exploit vulnerable SSH servers, by logging in to a host with a collection of usernames and passwords such as “admin/admin”, “test/test”, “root/root”, etc. These shouldn’t be of much concern if you’re keeping good passwords, but there are simple ways to prevent them regardless.
Continua”Keeping SSH access secure”
Feb 28 2005
If you’re running a stable server and are worried about an intruder modifying your system binaries to install new corrupted versions you should be using a filesystem integrity checker.
Continua”Monitoring your filesystem for unauthorised change Integrity”
Feb 28 2005
Small companies and homes are setup to use a dedicated Linux machine to act as a gateway, their bridge to the internet outside. Having a computer do the routing allows a lot more flexability than using a dedicated hardware router - for example the ability to join the network to another companies, or allow remote workers via a VPN solution.
Continua”Joining Networks with OpenVPN”
Feb 28 2005
NIS is a system which is designed to allow people to use the same username and password on a group of machines. (In NIS terms this group of machines is called a domain). This small introduction will guide you through setting up a central NIS server to centralise your logins, and a client to use it.
Continua”Sharing logins on multiple machines using NIS”
Feb 28 2005
When you are trying to reboot the system remotely after a kernel upgrade it’s a good idea to have a rescue net. Using lilo allows you just such a thing, automatic rebooting if the machine panics or hangs.
Continua”Remotely rebooting Debian GNU/Linux machines”
Feb 28 2005
It’s very useful to be able to view the statistics of websites, to see how visitors are finding your sites, which pages are the most popular, etc. Debian contains several packages for presenting this information to you, and here we’ll look at two of them.
Continua”Producing and using website statistics”
Feb 28 2005
HOW TO KEEP YOUR BOX MORE SECURE
When you have a large number of machines to look after it can be hard to keep track of changes in the network services you are running upon them. This brief article introduces a few tools and scripts which might make tracking changes easier.
Continua”Detecting changes to your network services”
Feb 28 2005
Apache is probably the most popular webserver for the Linux platform, and despite being very powerful and extensible it is very well documented. In spite of this documentation many people seem to struggle with hosting multiple sites with Apache.
Continua”Hosting multiple sites with Apache”
Feb 28 2005
This HOW-TO makes some bold assumptions. First it assumes that you are a somewhat competent system administrator. If you’re not, you still stand a decent chance of making it through but no guarantees. Second, it assumes you run BSDI 4.1 and are patched up. PAY ATTENTION to versions of software as listed below. Many of the software packages evolve and you’ll need to tweak the configure scripts to make them match the way I’ve got them set here. Read the changelog files on newer packages and see what’s changed before whining because something doesn’t work.
Continua”Qmail + vpopmail + CourierIMAP + sqwebmail for BSDI 4.1 Tutorial (v1.0)”
