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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: 77,084
    01-11-2010 Go to last post
  1. Centos or LPS on VMware? For sites that might be infected with virus.

    1) Sometimes i might want to check a website here and there that might be dodgy, and worry they can be infected with virus, malware etc. Also...

    Started by itrelated, 05-24-2019
    • Replies: 0
    • Views: 8,597
    05-24-2019 Go to last post
  2. Block third party initiated connections while allowing outgoing?

    Hello, file sharing application is unable to connect third party servers via internet after i iptables blocked INPUT from all ips except mine IPs (by...

    Started by postcd, 04-30-2019
    • Replies: 0
    • Views: 1,522
    04-30-2019 Go to last post
  3. site filtering http - https

    Hello, I am a teacher in an HS IT class. I take care of the network for my lab in full with a live IP for our class web site. I have been...

    Started by Kumado, 11-27-2018
    • Replies: 0
    • Views: 4,898
    11-27-2018 Go to last post
  4. is working on no-sudo-account more secure

    On windows I was afraid of keyloggers and although I was the only PC user and only myself had physical access to my PC, I always created second user...

    Started by kenpo, 07-27-2018
    • Replies: 1
    • Views: 3,712
    11-10-2018 Go to last post
  5. Top CVEs exploited

    Hey folks, I'm try to get a list of the latest top cves exploited in the wild (active)? Any ideas where can I find this information? Thanks!

    Started by sh4ka, 08-31-2018
    • Replies: 1
    • Views: 3,707
    08-31-2018 Go to last post
  6. How to block multiple ports in iptables, ipset?

    Hello, on CentOS 6, iptables 1.4.7 i can use rule to block IPs in my IPSet from accessing one port, example SSH: -A INPUT -p tcp --dport 22...

    Started by postcd, 01-15-2018
    • Replies: 8
    • Views: 9,243
    01-24-2018 Go to last post
  7. ssh: starting different application instead of bash - secure?

    Hi, not sure if that's the right category here. I have the following setup: We are using a text based application (written in C), which...

    Started by tjareson, 09-29-2014
    • Replies: 5
    • Views: 5,079
    12-13-2017 Go to last post
  8. Server Flooded. With what? At What?

    The IP hit us with 2TB of data in under 5 minutes. To stop the flood, we have been forced to null route the server. was...

    Started by Rob-0, 12-01-2017
    • Replies: 0
    • Views: 2,660
    12-01-2017 Go to last post
  9. selinux and iptables

    Hello, i would like to have more idea about my setup i have this server for apache (had wordpress) and another, for mysql. i set them up...

    Started by fles, 11-26-2017
    • Replies: 0
    • Views: 2,043
    11-26-2017 Go to last post
  10. SELinux access to file

    Hello everyone, I recently started to work with SELinux and its permissions and have encountered a problem. I want to open and write the...

    Started by Patrick-IT, 11-22-2017
    • Replies: 0
    • Views: 1,830
    11-22-2017 Go to last post
  11. 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: 6,597
    11-14-2017 Go to last post
  12. 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, 11-01-2017
    • Replies: 1
    • Views: 2,340
    11-01-2017 Go to last post
  13. 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: 2,123
    10-25-2017 Go to last post
  14. 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, 10-23-2017
    • Replies: 2
    • Views: 2,062
    10-24-2017 Go to last post
  15. 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: 2,380
    10-17-2017 Go to last post
  16. 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: 2,526
    10-08-2017 Go to last post
  17. 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: 1,941
    09-29-2017 Go to last post
  18. 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: 3,211
    09-19-2017 Go to last post
  19. 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: 2,044
    09-11-2017 Go to last post
  20. 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: 7,968
    08-03-2017 Go to last post

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