Line Rider – My Favorite Flash Game!

There are a lot of great games that have been developed with Flash. Tangerine Panic and Flight of the hamsters come to mind as some of the most entertaining web browser diversions to date. Until now that it! Last weekend we had some pretty serious upgrades to do at work and while we were waiting for all our servers to pull themselves together, we found Line Rider.

Line Rider is a game where you design a track upon which a little sledding figure rides. You can throw him, catch him and wreck him. If you get him going too fast and pull him too hard around a corner, his little sled will crush beneath his weight. The game is designed in such a way that you can return to design mode and make changes to your track as often as you like. You can even save your track and come back to edit it later.

My track involved a lot of air and catches, but others have done some pretty amazing things by incorporating an interesting track with amazing artwork. This video is just one example.

Disable SSH Root Logins on RHEL

For one reason or another RHEL does not disallow incoming ssh connections as root. This is, of course a glaring security problem which should be addressed for all systems that allow ssh connections to be made from any but the most restricted networks.

The best practice, of course, would be to make the initial ssh connection as an unprivileged user and then use the “su” command to promote yourself to root. This way, even if an attacker managed to get into the system, it would be as an unprivileged user and they would not able to do much harm. Allowing incoming ssh connections at root leaves you much more exposed to attack. Granted your root password is still protecting you, but it becomes your only layer of defense.

Ok, so how do we disallow incoming ssh connections as root on our RHEL box?

First, edit “/etc/ssh/sshd_config”

Find the section of the file that looks like this:

# Authentication:
#LoginGraceTime 2m
#PermitRootLogin yes
#StrictModes yes
#MaxAuthTries 6

Change this line:
#PermitRootLogin yes

To this:
PermitRootLogin no

Restart sshd:
/sbin/service sshd restart