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Forum: Security

Post here for help with Linux security issues: antivirus, firewalls, encryption, vulnerabilities, etc

  1. Sticky Thread Sticky: A short guide to Linux security

    Here at we are often asked about the potential threat of a virus or malware attack. This short guide is designed to answer some of...

    Started by fingal, 02-25-2006
    • Replies: 1
    • Views: 52,427
    01-11-2010 Go to last post
  1. Question Unusual Network Activity Monitored

    Hi, I have just noticed an unusual continuous incoming netwok traffic in my Linux(Fedora 13) web server. But at that time, there were no outgoing...

    Started by amithad, 09-26-2011
    • Replies: 0
    • Views: 690
    09-26-2011 Go to last post
  2. Losing Connectivity

    I have a triple-boot machine with the following OS's: 1) RHEL 5.4 2) Vista SP2 3) RHEL 5.3 I am set up with static IP addresses all within the...

    Started by felton57, 09-26-2011
    • Replies: 0
    • Views: 515
    09-26-2011 Go to last post
  3. RKHunter Warnings?

    Hi, I just did a scan on two of my linux conputers with chkrootkit and Rkhunter. chkrootkit showed nothing on both. But rkhunter said otherwise, it...

    Started by jreidsma, 09-24-2011
    • Replies: 5
    • Views: 11,473
    09-24-2011 Go to last post
  4. SSH Tunnel Security

    Hi there, The fun police at work have blocked a number of previously accessible sites. Due to this, I am considering setting up and SSH Tunnel to...

    Started by not_the_messiah, 09-23-2011
    • Replies: 3
    • Views: 1,360
    09-24-2011 Go to last post
  5. Protecting Data From Cloning

    Hi, I'm wondering if anyone has suggestions as to how to protect a system from cloning? I understand it's near impossible to stop someone...

    Started by brandoo, 09-19-2011
    2 Pages
    1 2
    • Replies: 18
    • Views: 2,137
    09-24-2011 Go to last post
  6. Secure Storage based on login password

    Hi, having seeked for such a solution for a while, and haven't found anything, I would like to ask this here: Is anyone aware of any...

    Started by kommersz, 09-22-2011
    • Replies: 6
    • Views: 1,871
    09-24-2011 Go to last post
  7. Does this mean my machine was compromised?

    On some linux distros, the first time you use the "sudo" command, you get a little warning message about accepting the responsibility. I entered a...

    Started by hoopyfrood, 09-15-2011
    • Replies: 4
    • Views: 1,431
    09-18-2011 Go to last post
  8. A question for a linux security expert

    I'm hacked all the time by bullies and I've uploaded an ubuntu image to a file host. I'm quite sure it is compromised and would like to have it...

    Started by kingston, 02-02-2010
    • Replies: 6
    • Views: 1,566
    09-17-2011 Go to last post
  9. using portsentry to run zenmap against attacker on detected portscan

    Hi all. I'm trying to configure port sentry so that one someone port scans me. It runs zenmap and runs a scan against far I have made these...

    Started by waffer, 07-30-2011
    • Replies: 2
    • Views: 1,171
    09-17-2011 Go to last post
  10. Source files where the who and ls command?

    I very often want to know where their source files ,because i find the long time.

    Started by ibelieveme, 09-15-2011
    • Replies: 4
    • Views: 2,146
    09-16-2011 Go to last post
  11. Centralized Linux Root Password administration

    I hope this is posted in the right area! I am trying to investigate options for Admin access to hundreds of Linux and other UNIX systems. ...

    Started by cgross, 08-15-2011
    • Replies: 2
    • Views: 1,345
    09-14-2011 Go to last post
  12. Some security things

    Hi, I just installed ClamAV and Chkrootkit scanners and whenever I run ClamAV it says it is out of date and I need to update it. But I don't know...

    Started by jreidsma, 08-31-2011
    2 Pages
    1 2
    • Replies: 13
    • Views: 4,426
    09-06-2011 Go to last post
  13. How do I specify the source port in the ssh client?

    Hi all, I have an ssh server on FreeBSD, and on the firewall i have this rule: block all in pass in log proto tcp from any port 3333 to port...

    Started by Barakat, 08-24-2011
    • Replies: 8
    • Views: 8,481
    08-30-2011 Go to last post
  14. File permissions to restrict access (like Windows XP encryption)

    Hi, Is it possible to set the permissions (or use some utility) which : 1)Only allows files to only be accessed by a given user 2)which cannot...

    Started by artella, 08-17-2011
    • Replies: 7
    • Views: 1,351
    08-18-2011 Go to last post
  15. How https sites data works between Dansguardian, squid and external

    Hi, Lets say that I have a remote server with dansguardian working with squid. A computer client connects to the remote server to be filtered. If...

    Started by hrosa, 08-17-2011
    • Replies: 0
    • Views: 1,336
    08-17-2011 Go to last post
  16. how can i forward ssh to a internal ip using iptables?

    Hello! i have recently setup a debian server to manage my network, it uses ipv4 forwarding for the routing, iptables for the firewall and hostapd for...

    Started by lacrosse1991, 08-04-2011
    • Replies: 1
    • Views: 2,694
    08-16-2011 Go to last post
  17. Help with a logged packet

    Beefing up my firewall after reading some articles, I placed a rule to log and drop any packet coming in on my external interface with my IP as a...

    Started by dpatte, 08-07-2011
    • Replies: 4
    • Views: 1,186
    08-09-2011 Go to last post
  18. cryptsetup disk encryption problem

    Hi, I have a problem with my cryptsetup disk encryption. So I set up, installed it and everything. It works fine. The only thing is that I...

    Started by linuxext4, 07-29-2011
    • Replies: 6
    • Views: 1,511
    07-31-2011 Go to last post
  19. how to test apf firewall on network

    I have installed apf firewall in my system.can anyone tell me how test its features so that i can say my system is fully protected.i have tested...

    Started by deepmala8, 06-24-2011
    • Replies: 1
    • Views: 1,254
    07-20-2011 Go to last post
  20. John The Ripper

    Hi Community, I understand that John the Ripper is compatible with wordlists and that you can use rules to refine those lists, but is there a way...

    Started by chumponimys, 07-11-2011
    • Replies: 3
    • Views: 1,715
    07-20-2011 Go to last post

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