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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: 69,994
    01-11-2010 Go to last post
  1. Nmap

    Hi, What I'm trying to do is avoid the detection of nmap. So when I run some of this : nmap -PN nmap -v -f ...

    Started by Blackzer, 07-12-2010
    • Replies: 2
    • Views: 1,023
    08-13-2010 Go to last post
  2. Question Snort Important Rules

    hello all, Iíve installed fwsnort on a linux server it uses snort rules and include them to the iptables. I can use fwsnort to load specific...

    Started by george87, 08-08-2010
    • Replies: 1
    • Views: 2,846
    08-09-2010 Go to last post
  3. How one gets infected with a rootkit, virus, trojan, etc, on linux?

    Can something like that happen just by browsing, like bypassing those warnings by google? Most of windows viruses I know (well, I don't even know...

    Started by the dsc, 08-02-2010
    • Replies: 4
    • Views: 4,579
    08-09-2010 Go to last post
  4. Linux Firewall (IPTABLES)

    HI! I have worked a lot at iptables and deployed it in my office working environment. I have no issue in deployment and configuration. Anybody...

    Started by fnregister, 08-03-2010
    • Replies: 1
    • Views: 892
    08-05-2010 Go to last post
  5. User account locking not working in Pam

    Hi I am facing another problem while configuring the system-auth file for setting user account locking after 3 fail attempts. But this...

    Started by cj_cheema, 07-25-2010
    • Replies: 7
    • Views: 12,993
    08-03-2010 Go to last post
  6. How do you do bock spoofing attack, invalid packets and other?

    How do you do bock spoofing attack, invalid packets and other? Please, post you code for iptables.

    Started by wertum, 07-27-2010
    • Replies: 1
    • Views: 964
    08-03-2010 Go to last post
  7. Server infected with scanssh, pscan2, ./sshf. Urgent Help Required

    HI Gurus, I am facing a security issue on my server. I can see many process like pscan2, scanssh and ./sshf processing on 'top'. The owner of...

    Started by Xaeem, 07-31-2010
    • Replies: 2
    • Views: 6,751
    08-02-2010 Go to last post
  8. Running services as specific users

    Hi guys, I'm not new to Linux but no expert by any means and currently I'm running Gentoo. Something I've always wondered about is how you go about...

    Started by FunkyMcBain, 08-01-2010
    • Replies: 4
    • Views: 1,308
    08-02-2010 Go to last post
  9. Linux and malware

    Hi! I am completly new to Linux, and this is my first thread on this forum. We have a network at my job that needs to be completly offline due...

    Started by hovmedia, 07-30-2010
    • Replies: 1
    • Views: 890
    07-30-2010 Go to last post
  10. Write Permisson Denied

    I created a user "CATUSER" and using the usermod command I had set the secondary group of the "CATUSER" to "beagrp". usermod -a -G beagrp CATUSER...

    Started by balamuruganmurthy, 07-28-2010
    • Replies: 2
    • Views: 1,085
    07-29-2010 Go to last post
  11. Bastille on Debian 5.0

    Hallo I habe Problem to applay my instruction on my Debian lenny 5.0. here ist the error-log ich habe versuche Bastille zu installalieren es...

    Started by Angela1, 07-27-2010
    • Replies: 2
    • Views: 1,586
    07-28-2010 Go to last post
  12. create ssl cert with owner info

    if i go to, for example, https firefox will tell me that the owner is unknown, whereas if i go to https their ssl cert provides...

    Started by spezticle, 06-29-2010
    • Replies: 1
    • Views: 1,515
    07-26-2010 Go to last post
  13. [SOLVED] CBL Keeps Listing

    Hi all, I am using the latest version of Plesk with my CentOS server. For some reason, CBL keeps listing my server's IP address. I made the open...

    Started by telmessos, 07-22-2010
    • Replies: 1
    • Views: 2,148
    07-26-2010 Go to last post
  14. Can't Run BitDefender Antivirus on Ubuntu 10.04?

    I downloaded BitDefender off their website, and tried running the program. After download, a window pop up that said "An error occured while loading...

    Started by Alvina, 07-22-2010
    • Replies: 3
    • Views: 3,766
    07-23-2010 Go to last post
  15. syslogger query

    I'm using a security audit tool which gives the following requirement for mail logging: mail.* /var/log/maillog mail.none /var/log/maillog...

    Started by matonb, 07-20-2010
    • Replies: 0
    • Views: 600
    07-20-2010 Go to last post
  16. Encrypt my data on a multi-boot computer

    Hi, To gain some privacy (and stuff like this), I would like to encrypt my data. I'm not looking for the absolute best secure method in the world...

    Started by martvefun, 07-19-2010
    • Replies: 0
    • Views: 1,253
    07-19-2010 Go to last post
  17. Question about files in /tmp folder

    In my /tmp folder, i have two items which are locked: orbit-gdm pulse-PKdhtXMmr18n Is this normal/safe? If not, is it safe to delete these?

    Started by Ocifer, 07-18-2010
    • Replies: 1
    • Views: 10,006
    07-18-2010 Go to last post
  18. Paranoia

    Ok, so one day My machine went crazy. The mail server stopped working, and I had to completely re-install it and it took forever. So I was...

    Started by xilus, 07-07-2010
    • Replies: 4
    • Views: 1,149
    07-17-2010 Go to last post
  19. Question problem with script

    Hi every one I have started to deal with Linux from nearly time I have network can prevent any one to log in if he/she don't register the MAC...

    Started by blaly, 07-11-2010
    • Replies: 3
    • Views: 903
    07-15-2010 Go to last post
  20. Question are linux have virus?

    hi all are os linux can be infect with virus or Trojan? please any information help me regard vip

    Started by vipser, 07-10-2010
    • Replies: 4
    • Views: 1,085
    07-13-2010 Go to last post

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