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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: 52,003
    01-11-2010 Go to last post
  1. How to block a particular website to the clients?

    Hi, I have a proxy server configured on RHEL 5. My boss wants me to block Orkut and other social sites to few client machines. I am not sure how to...

    Started by lilchakki, 01-05-2010
    • Replies: 4
    • Views: 3,379
    01-08-2010 Go to last post
  2. Spam Filtering

    Hello; I have a mail server installed postfix and spamassin. I am receiving fake spam mails sender contains my domain. How can i reject them. I...

    Started by gocebe, 06-17-2009
    • Replies: 1
    • Views: 721
    01-08-2010 Go to last post
  3. my machine is on risk?

    1) I found in auth.log, What is that mean, I didn't do su at that time, 2) Why there has a lot of session opened & closed?

    Started by sf433, 09-03-2005
    • Replies: 3
    • Views: 15,137
    01-08-2010 Go to last post
  4. please help me ddclient

    i installl ddclient and work perfect ubuntu 9.04 the problem that ddclient.conf is not protected anyone use my pc can access to ddclient.conf and...

    Started by alimo, 01-06-2010
    • Replies: 0
    • Views: 546
    01-06-2010 Go to last post
  5. Firewall help

    hi there i have recently bought and old laptop to help me with linux at college (put ubuntu on it and impressed so far), unfotunately i missed a few...

    Started by pinguroolz, 11-26-2009
    • Replies: 5
    • Views: 740
    01-06-2010 Go to last post
  6. Quaratine module

    Hi everybody! I need to find some kernel quaratine module or source code. I found clamav but i don't found exactly quaratine module in the...

    Started by stork, 01-03-2010
    • Replies: 6
    • Views: 701
    01-05-2010 Go to last post
  7. Lost Control of Linux Virtual Machine

    Hi Everyone, I have a unique issue. I am sure it is an easy fix but I am stumped due to my relatively inexperience to Virtual machines and linux....

    Started by gh0pp3r, 01-03-2010
    • Replies: 3
    • Views: 1,187
    01-04-2010 Go to last post
  8. [SOLVED] spyware scanners

    yes i know linux is not as vulnerable to such things. (^_^) but i'm building somewhat of a bootable disk to service windows installs and was...

    Started by itachisxeyes, 12-28-2009
    • Replies: 4
    • Views: 722
    01-02-2010 Go to last post
  9. Restricted ssh

    Hi all, I search an efficient way to restrict ssh connections to only run a specific command. It is intended to be used automaticaly. Say the user...

    Started by Meneth, 12-24-2009
    • Replies: 1
    • Views: 909
    12-28-2009 Go to last post
  10. Cool Firefox and Tor? Forget about it!!

    With mounting security problems I'm finally saying, "Firefox and Tor? Forget about it!!" I want something less bloated like Dillo: I haven't...

    Started by zsexdr, 12-21-2009
    • Replies: 3
    • Views: 1,856
    12-28-2009 Go to last post
  11. Gtkrc file browse in GDM manager (gdmsetup) overrides ALL permissions!!

    I was surprised to find this when accessing the gdm login windows preferences manager. When i click on the general tab and tick the "Gtkrc file"...

    Started by Ganz, 12-24-2009
    • Replies: 0
    • Views: 1,590
    12-24-2009 Go to last post
  12. Enable USB

    Hi All, How to enable a USB in Redhat9 system. I am having a root password for the OS, but i guess it is disabled through BIOS. Is there any...

    Started by, 12-08-2009
    • Replies: 5
    • Views: 746
    12-21-2009 Go to last post
  13. 2.6.31 iptables ignores reply pkt at interface SNAT+VLAN

    Hi, I have a bit complex iptables+nat+mangle+vlan's setup within my box working perfectly with 2.6.30 and previous kernel versions. However, If I...

    Started by luispa, 11-07-2009
    • Replies: 2
    • Views: 2,480
    12-18-2009 Go to last post
  14. virus or trojan?

    In linux binaries, in any linux distro, I've discovered the same strings which I believe may be due to a virus or trojan. Yet, clamav, rkhunter,...

    Started by zsexdr, 12-12-2009
    • Replies: 1
    • Views: 797
    12-12-2009 Go to last post
  15. Question ip filtering and Port filtering

    ip filtering : - filter ip packets based on protocol { UDP ,TCP } , ports , src ip ,dest ip , packet type . Port filtering : - filter ip...

    Started by karana, 12-09-2009
    • Replies: 1
    • Views: 1,763
    12-09-2009 Go to last post
  16. External Authentication via RadiusNT

    I have radiusNT server , i want to authenticate my CentOS machines via radiusNT server i have six machines and one centralized radius server, i want...

    Started by codered0001, 11-25-2009
    • Replies: 1
    • Views: 874
    12-07-2009 Go to last post
  17. SElinux context login problem

    Hello ! I have installed SElinux (included SElinux kernel options) on my openSUSE 11.1 with kernel I`m using the "refpolicy-2.20091117"...

    Started by Bit-Devil, 12-05-2009
    • Replies: 0
    • Views: 1,930
    12-05-2009 Go to last post
  18. Pages are being modified?

    Hello, I noticed that my pages are being modified, Javascript is added that calls a script on an off-site server that will load a PDF file without...

    Started by higgenkreuz, 11-29-2009
    • Replies: 2
    • Views: 621
    12-02-2009 Go to last post
  19. Question Related to cryptography

    Can anyone tell me, how can I know the type of cryptographic algorithm by just manually looking at the cipher text or through which algorithm that is...

    Started by anujchadha, 11-27-2009
    • Replies: 0
    • Views: 571
    11-27-2009 Go to last post
  20. Client-side authentiation

    Dear linux fans! My topic is not strictly related to linux, but I still turn to this forum in hope to get some insight. I know they say in...

    Started by kristianlm, 11-23-2009
    • Replies: 4
    • Views: 586
    11-24-2009 Go to last post

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