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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: 73,501
    01-11-2010 Go to last post
  1. Exclamation Has my hosting provider been compromised?

    Hi, My virtual server hosted by a large and well known hosting company is behaving very oddly, even after re-imaging. Symptom: When logged...

    Started by variant, 06-29-2011
    • Replies: 1
    • Views: 1,200
    06-29-2011 Go to last post
  2. transfer pgp public and private keys to new server running gpg

    Hiya all, For all my googling, I am unable to work through the haze that is gpg. I understand the principles, but cannot translate this to a...

    Started by Hotchips, 06-22-2011
    • Replies: 0
    • Views: 1,915
    06-22-2011 Go to last post
  3. How to enable passphrase for access via ssh

    Hello, How can I enable passphrase along with the password for login via ssh ? In that whenever I login from server A to server B via ssh, it...

    Started by me_spearhead, 04-21-2011
    • Replies: 3
    • Views: 1,964
    06-20-2011 Go to last post
  4. Grub Bootloader authentication

    Hi I am a newbie. I am trying to get MBR shadow working. I have 2 physical memories in my system. i.e. I have the MBR/grub with password enabled...

    Started by odomae, 06-15-2011
    • Replies: 1
    • Views: 1,256
    06-15-2011 Go to last post
  5. Lightbulb Modify UNLINK system call so that it is a WIPE and then UNLINK?

    Hello all! Closed source applications used on our server use the unlink system call to delete files. My goal is to make it so unlink system...

    Started by s1sw, 04-28-2011
    • Replies: 4
    • Views: 2,133
    06-13-2011 Go to last post
  6. Giving console permissions

    Hi, I wanted to know if there is a way to give console permissions? What I need this for is: I have a script that I start as root that would...

    Started by jreptak, 06-10-2011
    • Replies: 4
    • Views: 1,120
    06-10-2011 Go to last post
  7. Question Newbie question about user bin,daemon, etc

    Hi everyone! I have a newbie doubt, checking the /etc/passwd file from my server (SuSE 10 SP1), there are various system users like bin, daaemon,...

    Started by keita_mog, 06-09-2011
    • Replies: 1
    • Views: 1,412
    06-09-2011 Go to last post
  8. shorewwall forwad public vip to private vip on same box

    hi, I am having problems forwarding from public vip to private vip and back configuration files interfaces ...

    Started by shorif2000, 06-08-2011
    • Replies: 0
    • Views: 1,311
    06-08-2011 Go to last post
  9. Ssh and SFTP access control

    Dear All, I have allowed remote user to log into the server via these two (SSH and SFTP) method. The problem now I have read on the net...

    Started by newbie14, 05-31-2011
    2 Pages
    1 2
    • Replies: 12
    • Views: 19,322
    06-06-2011 Go to last post
  10. Post Configuring firewall pci dss

    Following are security policies for PCI DSS - FTP services are not allowed from External zone to PCI zone. TFTP services are not allowed from...

    Started by gattaca, 06-04-2011
    • Replies: 0
    • Views: 2,370
    06-04-2011 Go to last post
  11. SOB...concerned I've been breached

    Hi All, I'm concerned my security has been breached but I don't know how to check it. I noticed at least yesterday (could have been before) that...

    Started by jmadero, 04-12-2011
    3 Pages
    1 2 3
    • Replies: 29
    • Views: 3,134
    06-04-2011 Go to last post
  12. Port monitoring or real time netstat

    The Setup: I have a CentOS server I just inherited and we don't have adequate documentation for how it was configured. The problem: My security...

    Started by lostowl, 04-27-2011
    • Replies: 1
    • Views: 3,928
    06-02-2011 Go to last post
  13. fail2ban and vsftp

    Hi, I've setup fail2ban to try and block some ftp login failures. I've changed the fail slightly to: enabled = true filter = vsftpd

    Started by adrianmarsh, 03-30-2011
    • Replies: 1
    • Views: 5,658
    05-25-2011 Go to last post
  14. DDoS Flood IPtables Rules/Script

    I've looked through this site as well as many others. I know little to nothing about Linux and I put Ubuntu on my server computer because we kept...

    Started by Adeya, 05-18-2011
    • Replies: 1
    • Views: 2,980
    05-18-2011 Go to last post
  15. Random logins from an unknown server?

    Im getting a few random on my server logins and it looks like they have messed with a few things and to say the least im not very happy. Rather then...

    Started by georanson, 05-12-2011
    • Replies: 5
    • Views: 1,490
    05-15-2011 Go to last post
  16. Question how to cross compile firestarter firewall

    Hi, I am a new bee in linux security ,I want cross compile the firestarter firewall for montavista linux power pc ,I have downloaded the...

    Started by deepmala8, 05-10-2011
    • Replies: 2
    • Views: 1,783
    05-12-2011 Go to last post
  17. [SOLVED] Shorewall Problem NAT

    Hello Linux Community :) I am trying to use a PC as Gateway/Router. I installed Debian Sqeeze and Shorewall and configured all. This is a Testing...

    Started by mrd23, 05-06-2011
    • Replies: 0
    • Views: 2,469
    05-06-2011 Go to last post
  18. sftp on OpenSSH - change date modified, second is missing

    Hi, how to get the built-in sftp on openssh to set the date modified of uploaded file properly? I use FileZilla client and saw the log file uses...

    Started by callmelann, 05-03-2011
    • Replies: 2
    • Views: 2,629
    05-05-2011 Go to last post

    Hello, I have been experiencing phishing attack for few days on my server(Cent0S), the subdomains created by itself and I found...

    Started by smaj84, 05-01-2011
    • Replies: 1
    • Views: 833
    05-04-2011 Go to last post
  20. My computer was compromised. How?

    I would like some advice on how to find out how someone accessed my Fedora 14 machine a couple of days ago. Someone used VNC to run some commands,...

    Started by Hammer842, 04-29-2011
    • Replies: 2
    • Views: 1,375
    04-29-2011 Go to last post

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