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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: 52,420
    01-11-2010 Go to last post
  1. using a hashed password file

    I'm looking for an encryption utility/software that will help me do the following: I have a script that runs periodically that will look at a file...

    Started by dpm7896, 10-08-2012
    • Replies: 2
    • Views: 532
    10-09-2012 Go to last post
  2. Question Hacked CentOS 5 server - possible rootkit installed?

    I am running CentOS 5.3 and here is the result of "chkrootkit": Possible t0rn v8 \(or variation\) rootkit installed Warning: Possible Showtee...

    Started by dand, 10-04-2012
    • Replies: 3
    • Views: 2,443
    10-05-2012 Go to last post
  3. Password Protected RSA keys for ssh

    Hey, I was just wondering if people opted to password protect their RSA keys, or if they just left them raw. For me, I like to hope that I maintain...

    Started by hobuscorpus, 10-03-2012
    • Replies: 2
    • Views: 801
    10-03-2012 Go to last post
  4. Exclamation My CSF is blocking me from webmin

    My CSF keeps blocking me from going to webmin and sometimes to me site and even SSH. I added my ip to whitelist but i have a dynamic ip so this is...

    Started by Website, 10-01-2012
    • Replies: 1
    • Views: 1,130
    10-02-2012 Go to last post
  5. security issue: same uuid used twice

    possible security issue in linux kernel: Imagine you have an public linux computer (e.g. internet cafe) and you don't want someone (that is...

    Started by aleks-berlin, 09-26-2012
    • Replies: 1
    • Views: 658
    09-30-2012 Go to last post
  6. iptables problem with FORWARD not doing anything

    I have started using iptable and have working examples with input and output and masquerading. However I do not understand how to get FORWARD to work...

    Started by rainbow3, 09-18-2012
    • Replies: 0
    • Views: 446
    09-18-2012 Go to last post
  7. Encrypted Video Requirement

    Hello all, First time poster so if I've inadvertantly broken any forum rules I apologise in advance. Basically I'm a newbie to linux, have...

    Started by mikec1987, 09-16-2012
    • Replies: 1
    • Views: 999
    09-17-2012 Go to last post
  8. How to disable certain commands for a user..??

    Hi All, Is there any way to disable a certain commands for a particular user..?? We are using Solaris 10 8/11. Thanks for your help. ...

    Started by shettyjayapal, 09-10-2012
    • Replies: 1
    • Views: 499
    09-15-2012 Go to last post
  9. Looking at a linux firewall?

    I've been looking at various linux based firewall's that will help me in a few area's; so far the ones I've came across is. Untangle IPCop...

    Started by SeanC, 09-12-2012
    • Replies: 1
    • Views: 769
    09-14-2012 Go to last post
  10. Exclamation How to find out firewall working or not?

    I am newbie to linux and last night i installed APF firewall in my server. Actually i dont know whether it is working or not. how to find out...

    Started by olddocks, 11-26-2007
    • Replies: 4
    • Views: 9,289
    08-31-2012 Go to last post
  11. hacked by Opyum Team

    Can somebody please tell me what to do if you have been hacked by this Opyum Team? Now they have full root privileges They have a cron job called f...

    Started by Website, 08-05-2012
    2 Pages
    1 2
    • Replies: 13
    • Views: 5,760
    08-30-2012 Go to last post
  12. PSAD is Giving a Firewall Setup Warning. But UFW Logging is enabled.

    I have setup PSAD on my server. It asks me to add the following iptables rules: iptables -A INPUT -j LOG iptables -A FORWARD -j LOG ip6tables -A...

    Started by THpubs, 08-26-2012
    2 Pages
    1 2
    • Replies: 11
    • Views: 5,187
    08-28-2012 Go to last post
  13. How to block flooding?

    During last 4 days, my machine's is under flooding. Today i install ntop. I make SS (in attachments) Right now i have 8 pages of that. Few hours ago...

    Started by AngelDeaD, 08-13-2012
    2 Pages
    1 2
    • Replies: 10
    • Views: 1,398
    08-27-2012 Go to last post
  14. IPTables configuration possibly causing trouble

    Hi, For one of my customers I'm running a web application on a RHEL 5 server. To protect against any intruders, I'm running iptables on this...

    Started by Lister432, 08-23-2012
    • Replies: 6
    • Views: 1,121
    08-26-2012 Go to last post
  15. Anti-virus scanning for T-bird

    Is there any way to get an addon built for T-bird that will scan emails and attachments and either get them Marked or Tagged if they're infected? I'm...

    Started by blaineclrk, 08-19-2012
    • Replies: 7
    • Views: 787
    08-23-2012 Go to last post
  16. Question How do I harden Ubuntu server?

    I'm using (nearly current releases of) Ubuntu Server (32bit and 64bit) although I might swap Ubuntu for a BSD later. The machines listen on an...

    Started by stormbind, 06-07-2012
    • Replies: 3
    • Views: 2,328
    08-22-2012 Go to last post
  17. Lightbulb Open Source Firewall with Four or More Red Interfaces

    Hi, I want to implement a Open Source firewall with four red interfaces (outside interfaces). The following firewalls comes to my mind 1....

    Started by amithad, 08-18-2012
    • Replies: 3
    • Views: 794
    08-20-2012 Go to last post
  18. Probably got hacked

    Hello, I have a machine running CentOS 5.3. There are many bad things happening on it, and I hope that someone can suggest me a solution. 1) I...

    Started by robycentos, 08-07-2012
    • Replies: 6
    • Views: 891
    08-20-2012 Go to last post
  19. What kind of programs use ICEauthority?

    I ask because I don't have a ~/.ICEauthority file in either of my two minimalist systems and so far none of my apps has complained about the lack of...

    Started by hazel, 08-12-2012
    • Replies: 3
    • Views: 829
    08-13-2012 Go to last post
  20. UPnP required, but can't set firewall rule since port keeps changing

    I just started using jitsi the other day. It is advertised as a more secure alternative to skype. Apparently it requires UPnP to be turned on in my...

    Started by nomadicME, 07-25-2012
    • Replies: 6
    • Views: 2,262
    07-27-2012 Go to last post

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