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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: 51,553
    01-11-2010 Go to last post
  1. 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: 13,627
    06-06-2011 Go to last post
  2. 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: 1,609
    06-04-2011 Go to last post
  3. 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: 2,186
    06-04-2011 Go to last post
  4. 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: 2,637
    06-02-2011 Go to last post
  5. 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: 3,721
    05-25-2011 Go to last post
  6. 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: 2,477
    05-18-2011 Go to last post
  7. 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: 1,114
    05-15-2011 Go to last post
  8. 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: 1,304
    05-12-2011 Go to last post
  9. [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: 1,560
    05-06-2011 Go to last post
  10. 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: 1,880
    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: 540
    05-04-2011 Go to last post
  12. 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: 998
    04-29-2011 Go to last post
  13. Openswan mutli profile problem

    Hi all, I am having an issue with Openswan on a Debian server. Many tunnels have been working for a while on it. Few days ago, I added a new...

    Started by duedos, 04-28-2011
    • Replies: 0
    • Views: 508
    04-28-2011 Go to last post
  14. Post SELinux Project

    Hi everybody, I would like to secure my site and I want to implement CAS for SSO, SELinux for the permission into my server and CODA, the last...

    Started by majepiga, 04-20-2011
    • Replies: 2
    • Views: 674
    04-21-2011 Go to last post
  15. cryptographic engine support on Linux

    Dear All, Can anybody throw some light on the following things? I would like to know if provisions for cryptographic algorithms, especially...

    Started by ninja123, 01-18-2011
    • Replies: 2
    • Views: 805
    04-20-2011 Go to last post
  16. Kernel Fingerprinting

    Hi All, I recently had a serious break-in on a mailserver I administer. The system had to be wiped and re-installed from scratch. On...

    Started by prsjm3qf, 04-09-2011
    • Replies: 6
    • Views: 862
    04-17-2011 Go to last post
  17. [SOLVED] My Server making SQL injection requests

    I have been told by my server provider that my IP has been reported as making SQL injection attacks in multiple different websites. I am trying to...

    Started by apot, 04-11-2011
    • Replies: 5
    • Views: 1,097
    04-12-2011 Go to last post
  18. reverse ssh blocked

    Hi Guys, This is my first post at this forum and hopefully the first of many. I am a final year student in college and as part of a project I...

    Started by mentaaal, 04-07-2011
    • Replies: 6
    • Views: 1,132
    04-09-2011 Go to last post
  19. SSH printing workaround

    Hi Everyone, Here's a bit of background which you can skip unless you want to know why I created this workaround: There is a printer on the...

    Started by measure, 04-02-2011
    • Replies: 0
    • Views: 567
    04-02-2011 Go to last post
  20. [SOLVED] Shorewall Help Needed Pls

    hi all there i have configured shorewall using webmin on ubuntu 10.10 with DSL with dynamic IP from ISP. Internet is working fine but Outlook mail...

    Started by mkhurram92, 03-24-2011
    • Replies: 1
    • Views: 1,063
    03-29-2011 Go to last post

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