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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: 72,374
    01-11-2010 Go to last post
  1. File system granularity levels

    Is there a way to give permission levels go beyond READ. WRITE and EXECUTE. for example, if i want to restrict copy certain files to usb drives, it...

    Started by djpexhibit, 05-16-2017
    • Replies: 9
    • Views: 2,710
    6 Days Ago Go to last post
  2. How do you verify signatures?

    For context, I need to verify Qubes-OS. Link: I've been using Linux for 2 years now but I...

    Started by Alire, 2 Weeks Ago
    • Replies: 1
    • Views: 456
    2 Weeks Ago Go to last post
  3. Unauthorized USB uploads...whats the name of the program?

    I just did a fresh install of Fedora 26 on my laptop. I had previously installed an app that prevents unauthorized persons from sticking a...

    Started by Raafi, 07-21-2017
    • Replies: 1
    • Views: 422
    3 Weeks Ago Go to last post
  4. Intercept executed command and validate

    I need to know is it possible to intercept user executed command in loadable kernel module. I know that system calls can be intercepted such as...

    Started by djpexhibit, 4 Weeks Ago
    • Replies: 2
    • Views: 261
    3 Weeks Ago Go to last post
  5. Got Centos. Do i need LPS Linux for some tasks?

    Hi, I've got Centos installed on VMware. Sometimes i want to check a dodgy link, do some online banking or secure related operations on it...

    Started by itrelated, 10-16-2017
    • Replies: 2
    • Views: 389
    4 Weeks Ago Go to last post
  6. Is the Linux OS drive fully encrypted or can i do more?

    Hello, when i do "sudo lsblk" on Ubuntu 16.04.3 LTS cryptsetup 1.6.6, i see: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT...

    Started by postcd, 10-07-2017
    • Replies: 2
    • Views: 556
    10-08-2017 Go to last post
  7. iptables question, how fatal it is if it can not find IP Set?

    Hello, i am on CentOS 6, 2.6.32 kernel. and i installed "ipset" package. Now i created new ip set and populated it with IPs, i activated...

    Started by postcd, 09-29-2017
    • Replies: 0
    • Views: 407
    09-29-2017 Go to last post
  8. SELinux implementation with virtual machines

    I am working with SELinux for my final year project.My objective is to show how to prevent zero day exploits with SELinux.I am planning to use...

    Started by nengo, 10-08-2007
    • Replies: 3
    • Views: 1,293
    09-19-2017 Go to last post
  9. Firewall rules to drop all traffic on port 80 and 443 but allow wget .

    Hello all, I have a interesting situation here. My current situation is: I have a Linux server which acts as a gateway for several other Linux...

    Started by terrywhitejr2000, 09-11-2017
    • Replies: 0
    • Views: 555
    09-11-2017 Go to last post
  10. How can i redirect to other IP without "iptables -t NAT" ?

    Hello, i was curious which other method/s i can use to redirect incoming connection to different IP? Beside using "iptables -t NAT" kind of rule? ...

    Started by postcd, 07-29-2017
    2 Pages
    1 2
    • Replies: 15
    • Views: 2,437
    08-03-2017 Go to last post
  11. Top Reasons Why Linux Server Needs 2FA

    What are the process to secure linux servers?

    Started by reve-secure, 07-09-2017
    • Replies: 2
    • Views: 2,207
    07-27-2017 Go to last post
  12. System logging vs Auditing

    Hi all. I've got Oracle Linux 7 and I need to log events related to users logons, processes start\stop and some other in order to be in compliance...

    Started by Olegg, 07-21-2017
    • Replies: 2
    • Views: 1,212
    07-24-2017 Go to last post
  13. Post How can i iptables block hostname instead of IP and on partial match?

    Hello, how can i on Linux (CentOS 6 in my case) block all incoming connections (maybe better to say deny forwarding of the network connection...

    Started by postcd, 06-25-2017
    • Replies: 3
    • Views: 2,907
    07-04-2017 Go to last post
  14. SNORT rule does not work!

    hello I have a problem. I do these steps of snort for adjusting rule. 1. cd /etc/snort/rules 2. sudo nano twitter.rules 3. reject tcp any...

    Started by pink-hat, 06-22-2017
    • Replies: 0
    • Views: 760
    06-22-2017 Go to last post
  15. [SOLVED] decryption issue

    Hi there. When i installed my os, majaro, i chose to encrypt all the partitions. at the first boot i immidiately noticed it took a very long time to...

    Started by nicocasa, 06-07-2017
    • Replies: 1
    • Views: 2,232
    06-09-2017 Go to last post
  16. Secure my servers

    I have a small company with at least 5 workers. Well we have one server(FTP,mail,voip) and second server(PTGR, Cacti). We offer services to other...

    Started by victorzx, 06-06-2016
    • Replies: 4
    • Views: 6,744
    05-22-2017 Go to last post
  17. iptables rules

    when I apply the following rule iptables -A INPUT -i wlan0 -j REJECT iptables -A OUTPUT -o wlan0 -j REJECT am I rejecting all traffic on...

    Started by lgcs, 05-10-2017
    • Replies: 0
    • Views: 1,207
    05-10-2017 Go to last post
  18. Lightbulb Information on Linux GUI Based Trasperant Firewall

    Hi All, Could I know a good Linux firewall which is has GUI, QOS and Traffic control capabilities with good documentation? My requirement is as...

    Started by amithad, 05-04-2017
    • Replies: 0
    • Views: 1,280
    05-04-2017 Go to last post
  19. How do you set up locking out accounts after inactivity for 30 days?

    I've done some research but I've never done this with NIS. I'm wondering if what I describe here will work: On my NIS master, add to the...

    Started by edomingox, 04-27-2017
    • Replies: 2
    • Views: 1,753
    05-01-2017 Go to last post
  20. [SOLVED] What does this mean in iptables?

    I been having trouble figuring out what this means in one of my servers iptables. Maybe someone can explain it to me. Chain OUTPUT (policy...

    Started by edomingox, 03-31-2017
    • Replies: 2
    • Views: 4,577
    04-06-2017 Go to last post

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