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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: 72,775
    01-11-2010 Go to last post
  1. 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: 1,783
    10-02-2012 Go to last post
  2. 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: 1,117
    09-30-2012 Go to last post
  3. 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: 709
    09-18-2012 Go to last post
  4. 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: 1,412
    09-17-2012 Go to last post
  5. [SOLVED] 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: 780
    09-15-2012 Go to last post
  6. 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: 1,092
    09-14-2012 Go to last post
  7. 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: 9,830
    08-31-2012 Go to last post
  8. 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: 7,643
    08-30-2012 Go to last post
  9. 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: 9,495
    08-28-2012 Go to last post
  10. 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: 2,430
    08-27-2012 Go to last post
  11. 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: 1,726
    08-26-2012 Go to last post
  12. 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: 1,165
    08-23-2012 Go to last post
  13. 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: 2,938
    08-22-2012 Go to last post
  14. 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: 1,197
    08-20-2012 Go to last post
  15. 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: 1,415
    08-20-2012 Go to last post
  16. 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: 1,289
    08-13-2012 Go to last post
  17. 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: 3,825
    07-27-2012 Go to last post
  18. How to secure a samba server on a domain

    We have a server for backups that runs Samba. Anyone on the domain can access it by going to \\backups. Is there a way I can restrict access through...

    Started by abefroman111, 07-26-2012
    • Replies: 1
    • Views: 1,030
    07-26-2012 Go to last post
  19. Question SELinux Policy Creation

    I've just recently gotten into the Linux world about six months ago in our RHEL5 environment. Most of our servers that were provisioned over 18...

    Started by Xeln, 06-22-2012
    • Replies: 2
    • Views: 917
    07-25-2012 Go to last post
  20. [SOLVED] fail2ban responding to attacks even though all hosts are blocked

    I recently checked my /etc/hosts.deny file and found there were hundreds of entries of the form ALL: <ip address> presumably added by fail2ban....

    Started by Xander314, 06-30-2012
    • Replies: 6
    • Views: 1,896
    07-24-2012 Go to last post

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