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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: 52,847
    01-11-2010 Go to last post
  1. SSH tunnel server, no shell but still able to change pw?

    I have an SSH tunnel server that some people at work are using instead of a vpn since it's much nicer and simpler. I don't want to give the users...

    Started by humbletech99, 05-02-2008
    • Replies: 2
    • Views: 2,275
    05-08-2008 Go to last post
  2. Hidden process + zombie shell found on new install of ubuntu 8.04 - what do i do

    I upgraded to the latest ubuntu release, Hardy Heron 8.04, and noticed a shell process marked in the system monitor called 'sh Zombie'. It has a...

    Started by vermoos, 05-02-2008
    • Replies: 4
    • Views: 4,898
    05-08-2008 Go to last post
  3. Configuring tshark

    Hi guys I wanna collect the raw data to and from my server to cisco router. I googled and read up tshark, tried to find some simple guide for it...

    Started by ahs3ng, 05-06-2008
    • Replies: 4
    • Views: 7,507
    05-08-2008 Go to last post
  4. Can you really make XOR secure?

    I've been studying up XOR quite a bit, for various reasons. Mostly a trip back into the world of programming, but I've sort of been challenging...

    Started by SagaciousKJB, 05-08-2008
    • Replies: 0
    • Views: 1,684
    05-08-2008 Go to last post
  5. exec function

    i know that exec function in php used to execute commands , i have a problem:i try to use exec function to execute iptables command but i...

    Started by shyma, 04-30-2008
    • Replies: 7
    • Views: 1,330
    05-05-2008 Go to last post
  6. Pendrive affected by 'folder virus' and keeps remounting every two minutes or so.

    Hi all, I've a problem with my pendrive. I'm looking for some help. It sure is a windows virus but it has corrupted my pendrive and hence I'm...

    Started by svzard, 04-05-2008
    • Replies: 8
    • Views: 4,753
    05-01-2008 Go to last post
  7. apache server

    i want to find the port number of apache server. because i have problem: when i start the apache i can not connect to the internet.

    Started by shyma, 04-29-2008
    • Replies: 1
    • Views: 674
    04-29-2008 Go to last post
  8. SmartCard Authentication

    Hi, I'm in the process of setting up a laptop and I would like to secure the data on it with some kind of two-factor authentication. I have surfed...

    Started by Knaldgas, 04-23-2008
    • Replies: 4
    • Views: 1,433
    04-28-2008 Go to last post
  9. How secure are my files in Linux?

    Hi, How secure are my files in Linux? If lets say I want to keep certain documents hidden from others, is there a way to protect them better...

    Started by DJRepresent, 04-24-2008
    • Replies: 4
    • Views: 1,084
    04-27-2008 Go to last post
  10. iptables

    how i can execute this iptables command iptables -A FORWRD -p tcp --sport domain -j REJECT

    Started by shyma, 04-12-2008
    • Replies: 4
    • Views: 919
    04-23-2008 Go to last post
  11. passwd: Critical error - immediate abort

    I have just discovered a very unusual thing. Trying to change any password on my gentoo laptop is now not possible using the standard passwd utility....

    Started by humbletech99, 02-11-2007
    • Replies: 3
    • Views: 8,342
    04-22-2008 Go to last post
  12. Can I limit the IP access for user?

    I mean: can I prevent any access for some user else from a specified IP/IP's ? I know it can be for the whole server, but I need to set an IP access...

    Started by kdman, 04-12-2008
    • Replies: 8
    • Views: 2,515
    04-22-2008 Go to last post
  13. Centralized authorized_keys file

    I would like to configure ssh to use one local authorized_keys file that is populated with the rsa public keys of all my users. I tried setting the...

    Started by, 04-17-2008
    • Replies: 0
    • Views: 1,811
    04-17-2008 Go to last post
  14. Backup, Cron+file server+ Linux with Clonezilla?

    Hi, Im trying to figure out a nice backup system for my linux box. I have heard of , ( not tried, still waiting on the hardware peices for the...

    Started by peec, 04-17-2008
    • Replies: 0
    • Views: 1,660
    04-17-2008 Go to last post
  15. Port change with iptables?

    Hello, In our University-net is the SMTP-Port closed for conexions from outside. In our institut we used a firewall for security: linux 2 Nics...

    Started by ErnestoV, 04-17-2008
    • Replies: 0
    • Views: 2,118
    04-17-2008 Go to last post
  16. Backtrack 2 "live cd" trouble

    So maybe this is the wrong section, im sorry, but this is a tool to test security in a network. so i got the backtrack 2 final cd all burned to the...

    Started by feltes45, 04-16-2008
    • Replies: 2
    • Views: 1,193
    04-17-2008 Go to last post
  17. Anyone know where I can find forum-type help for openssh in Windows?

    I'm about to jump out of my Windows at this point, because the documentation is so appallingly bad for openssh... especially for Windows. Tried...

    Started by ineloquucius, 04-09-2008
    • Replies: 1
    • Views: 829
    04-12-2008 Go to last post
  18. Dns

    how i can reject domain name service (DNS) using iptables command and how i can log rejected and accepted packets in linux firewall

    Started by shyma, 04-09-2008
    • Replies: 0
    • Views: 649
    04-09-2008 Go to last post
  19. firewall

    how i can create my own firewall using iptables and create script file

    Started by shyma, 04-08-2008
    • Replies: 2
    • Views: 696
    04-08-2008 Go to last post
  20. Privacy question...

    If I am on a network and we go through a firewall and it logs traffic, is there a way to surf the web more discreetly. I can use a proxy right? ...

    Started by AboveNBeyond, 04-07-2008
    • Replies: 2
    • Views: 725
    04-07-2008 Go to last post

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