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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: 69,951
    01-11-2010 Go to last post
  1. Sticky Bits

    I noticed a few files in /usr/bin have the a stickybit set sudo sudoedit newgrp passwd mtr gpasswd are they supposed to have a stickybit...

    Started by xilus, 09-29-2010
    • Replies: 1
    • Views: 937
    09-30-2010 Go to last post
  2. How to control folder access both via ftp and ssh?

    Dear Scortto, What I would like do first to add new user and allow new user to both actually ftp and ssh to my server. The...

    Started by newbie14, 09-29-2010
    • Replies: 0
    • Views: 1,066
    09-29-2010 Go to last post
  3. Odd UDP Traffic - VoIP Server

    Not sure what's going on here, but I can't seem to figure out which process is generating this traffic. Couple of questions: 1. How do I trace...

    Started by deftx, 09-20-2010
    • Replies: 3
    • Views: 2,423
    09-29-2010 Go to last post
  4. [auditd] when killed then kauditd logs to the console tty (?)

    Hello, I've watched that when auditd is killed, every log message is then copied to the console tty. Is it normal and is it any way to change this...

    Started by flatplane, 09-27-2010
    • Replies: 5
    • Views: 6,562
    09-28-2010 Go to last post
  5. What does this Firestarter log mean?

    Firestarter's log this morning... (Ubuntu 910)... Time:Sep 21 07:02:15 Direction: Unknown In:eth0 Out: Port:445 Source: Destination:...

    Started by cosmicbrat, 09-21-2010
    • Replies: 0
    • Views: 1,329
    09-21-2010 Go to last post
  6. [Debian Testing] Iptables makes system slow

    Hi, I configured an iptables and I don't dare to make it permanent because when I activate it my system becomes very slow. For example when I...

    Started by Keessince1988, 09-15-2010
    • Replies: 6
    • Views: 5,367
    09-17-2010 Go to last post
  7. Issue with pf > iptables rule translation

    Hi, Following a migration of my network from FreeBSD to Linux, I'm attempting to translate some PF rules into iptables syntax. The following...

    Started by enderwiggin, 09-15-2010
    • Replies: 0
    • Views: 1,270
    09-15-2010 Go to last post
  8. Remotely decrypting a server

    Hi folks, I have a tricky one here where i need to find a way to securely authenticate a decryption mechanism of some sort where the...

    Started by Phier, 09-12-2010
    • Replies: 1
    • Views: 664
    09-14-2010 Go to last post
  9. Guarddog Iptables help reading logs please

    Hey guys, please can you tell me what the following means? ABORTED IN=eth0 OUT= MAC=00:1b:24:af:dc:a4:00:30:bd:6d:58:aa:08:00 SRC=

    Started by Chris1989, 08-15-2010
    • Replies: 1
    • Views: 1,852
    09-13-2010 Go to last post
  10. Smile block an ip permanent do illegal ssh on my server

    how to block an IP do illegal ssh on my server? some one do brute shh to login my root.. I read old posted in this forum use this method: or ...

    Started by wempiebre, 09-07-2010
    • Replies: 3
    • Views: 1,255
    09-07-2010 Go to last post
  11. issue in denyhost

    Hi, i am using denyhost software my OS is redhat linux 4.2 and python version i amusing is 2.4.1.i was installed the denyhosts...

    Started by rmnaidu, 09-02-2010
    • Replies: 0
    • Views: 774
    09-02-2010 Go to last post
  12. Iptables and SYN-FLOOD attack

    Dear all, I've 2 problem with my new network infrastructure (I think!) I show you a basic plan of my network. First problem: Sometimes I lost...

    Started by Mouglou, 08-16-2010
    2 Pages
    1 2
    • Replies: 17
    • Views: 13,857
    08-31-2010 Go to last post
  13. Am I under attack?

    I've recently installed Firestarter Firewall on my Ubuntu Desktop and Laptop. Since then I have noticed that on my desktop the events page of...

    Started by Jonny87, 08-28-2010
    • Replies: 4
    • Views: 1,022
    08-29-2010 Go to last post
  14. how to log all the commands executed by root

    Hi I want to get a of log all the commands executed by the root user with the following details : incoming ip username (thru which su was...

    Started by me_spearhead, 08-11-2010
    • Replies: 5
    • Views: 4,678
    08-20-2010 Go to last post
  15. Iptables internet access problem

    I have a problem with a iptables firewall, if I use this file below I have limited internet access. ie I can't use or as a...

    Started by codge, 08-18-2010
    • Replies: 5
    • Views: 5,689
    08-20-2010 Go to last post
  16. block particular web site form multiple site hosted web server and allow others

    Dear All, I am having a web server (apache) hosted with 3 web sites, named as, and I need to restrict...

    Started by all2dark, 08-17-2010
    • Replies: 2
    • Views: 1,120
    08-17-2010 Go to last post
  17. Rkhunter log - loads of warnngs

    I have only just re-installed my copy of Ubunutu and wanted to tighten up on security so i got Rkhunter and here is the output log of my first run. ...

    Started by Chris1989, 08-15-2010
    • Replies: 4
    • Views: 4,859
    08-17-2010 Go to last post
  18. Every port is open!

    ok, so I just port scanned this server, and it is showing that just about every port is open. Are all these ports really open? or is this some kind...

    Started by xilus, 08-16-2010
    • Replies: 5
    • Views: 9,092
    08-16-2010 Go to last post
  19. Iptables Configuration Problem

    Hey everybody I've read this forum for a while now, but never here goes post #1. I am trying to create a simple iptables configuration...

    Started by parihar, 08-03-2010
    2 Pages
    1 2
    • Replies: 11
    • Views: 2,551
    08-16-2010 Go to last post
  20. Issues with selinux

    Hello, I have very strange things with selinux. My post may be will bit disordered, because I'm not completely understand what is going on. Before...

    Started by rodnower, 08-09-2010
    • Replies: 1
    • Views: 1,792
    08-14-2010 Go to last post

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