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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: 52,790
    01-11-2010 Go to last post
  1. vnc server connection refused and port appears closed

    I installed vncserver on my redhat, i installed same setup as i used on my last server where it worked. But now after start vncserver and trying...

    Started by postcd, 05-24-2014
    • Replies: 3
    • Views: 615
    05-25-2014 Go to last post
  2. Browser Hijack. Is there a way to block a domain?

    On hover, in Google Chrome, I am often redirected to other sites that display the attached screenshot telilng me to update my linux drivers. This is...

    Started by shyflower, 05-17-2014
    2 Pages
    1 2
    • Replies: 15
    • Views: 834
    05-22-2014 Go to last post
  3. How to be immune to basic UDP/any port attack flood?

    Hello, on server i have config server firewall and iptables. I would like server to be safe from basic UDP flood and any port attack flood....

    Started by postcd, 05-14-2014
    • Replies: 2
    • Views: 507
    05-22-2014 Go to last post
  4. How to allow only RELATED,ESTABLISHED TCP/UDP connections

    Hello, i got advice to Only allow RELATED,ESTABLISHED TCP/UDP connections for other ports such as 53 (DNS). so i want to ask what command i...

    Started by postcd, 05-15-2014
    • Replies: 4
    • Views: 502
    05-22-2014 Go to last post
  5. Fake browser plugins in live linux DVDs

    Firefox in PCLinuxOSFullMonty 2013.04 DVD, purchased from last year, has 12 plugins. Eleven of the plugins are fake. They are not in list...

    Started by BadBIOSVictim, 05-16-2014
    2 Pages
    1 2
    • Replies: 10
    • Views: 927
    05-20-2014 Go to last post
  6. New RFC to try and protect our privacy in the future.

    Started by docbop, 05-14-2014
    • Replies: 1
    • Views: 266
    05-14-2014 Go to last post
  7. HDD SMART value: Seek_Time_Performance - how to read?

    Hello, my HDD has this value when i do: smartctl -a /dev/sda I just want to ask how should i read this data, if my value is alarming or...

    Started by postcd, 04-28-2014
    • Replies: 3
    • Views: 543
    05-09-2014 Go to last post
  8. How long does it take RSA key generate? What my key then?

    Hello, i tried to generate key using linux command "gpg --gen-key". And it prompted my details about key, and after confirmed password, it started...

    Started by postcd, 05-04-2014
    • Replies: 5
    • Views: 592
    05-08-2014 Go to last post
  9. Modifying tar.gz / tar file to prevent extraction?

    Hello, im making backups of sensitive data to my VPS, i cant trust owner of the VPS node fully. So i got an idea on which i need Your comments. ...

    Started by postcd, 05-04-2014
    • Replies: 4
    • Views: 413
    05-07-2014 Go to last post
  10. Cloudflare malicious connections to my server?

    Hello, i thought cloudflare is used to serve content of webpage, but my website receiving connections like: As you can see these are quite...

    Started by postcd, 04-30-2014
    • Replies: 2
    • Views: 491
    05-03-2014 Go to last post
  11. Question Encrypted /root, /home, and swap mount at boot but not data LV shared?

    The following is how I have encrypted the /root, /home, and swap partitions on a disk already containing Windows 8.1 and only require a single...

    Started by dusf, 04-25-2014
    • Replies: 3
    • Views: 668
    04-27-2014 Go to last post
  12. enforcing iptables

    How do I enforce within iptables for the following rules.. Sudo iptables -A INPUT -p tcp --syn --dport 22 m connlimit --connlimit-above 2 -j DROP...

    Started by medeiom, 04-23-2014
    • Replies: 1
    • Views: 458
    04-24-2014 Go to last post
  13. Ssl certificate updation

    1) I am using a script to access a website that used an SSL cert to secure communication. 2) The site changed its certificate. 3) Now my script is...

    Started by Premsp1, 04-20-2014
    • Replies: 4
    • Views: 686
    04-24-2014 Go to last post
  14. How to set temporary IP ban in one command

    Hello, i want to deny an IP using iptables for 15 minutes. This must be one line command, because i want to use it in mod_deflate in...

    Started by postcd, 04-21-2014
    • Replies: 5
    • Views: 826
    04-22-2014 Go to last post
  15. fstab nodev option

    Hey guys (& girls), I'm having a really hard time trying to figure out what the "nodev" option in fstab actually does. I've read everywhere that...

    Started by XL-Reaper, 12-10-2010
    • Replies: 5
    • Views: 13,649
    04-19-2014 Go to last post
  16. problem to connect to the interface of pfsense

    hey, I installed pfsense 2.1.2 under Vmware and I configured 2 interfaces Lan and Wan! i give ip address lan of pfsense. I have also...

    Started by Henze, 04-16-2014
    • Replies: 0
    • Views: 782
    04-16-2014 Go to last post
  17. When i start CSF i cant connect VPS or download any data into it It a

    It appears i cant connect linux VPS server via SSH or i cant SCP any file to it and i cant wget any file TO it (from inside it) while CSF (Config...

    Started by postcd, 04-07-2014
    • Replies: 3
    • Views: 767
    04-14-2014 Go to last post
  18. NFS 4 with kerberos mount by principal

    Hello, Im trying to setup a multiuser environment booting from network. The system is self distro based on Ubuntu debootstrap I want to use nfs 4...

    Started by linuxmonster, 04-13-2014
    • Replies: 0
    • Views: 290
    04-13-2014 Go to last post
  19. Any Denial of Service test site with advice?

    Hi, please do you know any free or very cheap service which generates short time attacks on a remote webserver to test its security and ability to...

    Started by postcd, 03-31-2014
    • Replies: 2
    • Views: 412
    04-01-2014 Go to last post
  20. 3 steps to protect Webserver against DoS?

    Hi, there are 3 steps on how to protect against Denial of Service attack on a webserver: - limiting the number of requests that a server will...

    Started by postcd, 03-30-2014
    • Replies: 2
    • Views: 430
    03-30-2014 Go to last post

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