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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: 73,486
    01-11-2010 Go to last post
  1. 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: 1,786
    09-24-2011 Go to last post
  2. 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: 2,796
    09-24-2011 Go to last post
  3. 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: 3,420
    09-24-2011 Go to last post
  4. 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: 4,285
    09-18-2011 Go to last post
  5. 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: 1,843
    09-17-2011 Go to last post
  6. 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: 1,413
    09-17-2011 Go to last post
  7. 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: 2,728
    09-16-2011 Go to last post
  8. 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: 1,667
    09-13-2011 Go to last post
  9. 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: 5,087
    09-06-2011 Go to last post
  10. 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: 20,623
    08-30-2011 Go to last post
  11. 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: 1,809
    08-18-2011 Go to last post
  12. 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: 1,647
    08-17-2011 Go to last post
  13. 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: 3,233
    08-16-2011 Go to last post
  14. 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: 1,496
    08-09-2011 Go to last post
  15. 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: 1,894
    07-31-2011 Go to last post
  16. 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: 1,660
    07-20-2011 Go to last post
  17. 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: 2,224
    07-20-2011 Go to last post
  18. Smile ssh connections

    I am connecting through a ssh/sftp connection to a server from a win7 PC through bitwise tunneller software. I would like to know how safe is...

    Started by schamarthi1, 07-08-2011
    • Replies: 5
    • Views: 2,163
    07-13-2011 Go to last post
  19. Email Anti-virus

    Hi, I was trying to secure Email box integrating Postfix with clamsmtp to filter virus as shown www dot debian-administration dot org...

    Started by gopi219, 07-12-2011
    • Replies: 0
    • Views: 1,028
    07-12-2011 Go to last post
  20. to firewall or not to firewall?

    Hello, We had a small conflict today at work whether or not there is any major advantage to setup a firewall to a relatively small web server box...

    Started by zflash78, 07-05-2011
    • Replies: 2
    • Views: 1,147
    07-06-2011 Go to last post

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