Linux - Security This forum is for all security related questions.
Questions, tips, system compromises, firewalls, etc. are all included here. |
Notices |
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
Are you new to LinuxQuestions.org? Visit the following links:
Site Howto |
Site FAQ |
Sitemap |
Register Now
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
|
 |
02-10-2006, 06:31 PM
|
#1
|
LQ Newbie
Registered: Oct 2005
Posts: 10
Rep:
|
Locking down a neglected box
I have been running a Linux box for about half a year, and in thinking that it would always be just me using it, I've done some stupid security stuff with it. Yes, changing permissions of some files in /etc to 777. Now I need to give untrusted users access. Should I chown -R root /,chmod 700, then change what I need back to my user?
Also, are there any other steps that should be taken to prevent attacks from users?
|
|
|
02-10-2006, 07:31 PM
|
#2
|
LQ Guru
Registered: Jul 2003
Location: Los Angeles
Distribution: Ubuntu
Posts: 9,870
|
what distro?? what kernel??
what kinda access will the untrusted users have??
i'd say reinstall everything if possible, and then start the hardening process... you might wanna think about something like grsecurity, or selinux... you also might wanna install some kinda file integrity checker, like tripwire or whatever... set it to email you reports at least once a day, etc...
Last edited by win32sux; 02-10-2006 at 07:34 PM.
|
|
|
02-10-2006, 07:37 PM
|
#3
|
LQ Newbie
Registered: Oct 2005
Posts: 10
Original Poster
Rep:
|
Sorry I didn't include this, it's Debian testing/unstable with linux kernel 2.6.12
|
|
|
02-10-2006, 07:46 PM
|
#4
|
LQ Guru
Registered: Jul 2003
Location: Los Angeles
Distribution: Ubuntu
Posts: 9,870
|
Quote:
Originally Posted by bsmntbombdood
Sorry I didn't include this, it's Debian testing/unstable with linux kernel 2.6.12
|
well, the first thing i'd do if i was you is downgrade to STABLE...
a tripwire package is available... as for stable's kernel, i don't know if it is built with selinux support or not...
you might also wanna look into bastille, as it's a hardening tool which is also educational and stuff...
BTW, a nice tool for log file monitoring is logwatch...
Last edited by win32sux; 02-10-2006 at 07:56 PM.
|
|
|
02-11-2006, 04:09 AM
|
#5
|
Moderator
Registered: May 2001
Posts: 29,415
|
Since you run an ancient & vulnerable kernel and have fscked up the system I'd vote for reinstalling Debian STABLE from scratch. This way you have a more solid basis to start hardening from. Next to Win32sux' other advice please check out the LQ FAQ: Security references.
|
|
|
All times are GMT -5. The time now is 07:23 PM.
|
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.
|
Latest Threads
LQ News
|
|