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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: 71,263
    01-11-2010 Go to last post
  1. Searching for suspicious files and dirs, it may take a while... long list

    os suse 10.1 I think the list is very long do i have security problems? linux:/etc/ssh # chkrootkit ROOTDIR is `/' Checking `amd'... not found...

    Started by brev, 05-10-2008
    • Replies: 1
    • Views: 1,073
    05-10-2008 Go to last post
  2. 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: 2,588
    05-08-2008 Go to last post
  3. 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: 5,505
    05-08-2008 Go to last post
  4. 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: 8,032
    05-08-2008 Go to last post
  5. 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, 05-07-2008
    • Replies: 0
    • Views: 1,879
    05-07-2008 Go to last post
  6. 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: 1,630
    05-05-2008 Go to last post
  7. 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: 5,076
    05-01-2008 Go to last post
  8. 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: 824
    04-29-2008 Go to last post
  9. 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: 1,969
    04-28-2008 Go to last post
  10. 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: 1,365
    04-27-2008 Go to last post
  11. 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: 1,126
    04-23-2008 Go to last post
  12. 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: 9,813
    04-22-2008 Go to last post
  13. 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: 3,140
    04-22-2008 Go to last post
  14. 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: 2,187
    04-17-2008 Go to last post
  15. 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: 1,898
    04-17-2008 Go to last post
  16. 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: 2,265
    04-17-2008 Go to last post
  17. 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: 1,345
    04-17-2008 Go to last post
  18. 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: 954
    04-12-2008 Go to last post
  19. 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: 766
    04-09-2008 Go to last post
  20. firewall

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

    Started by shyma, 04-08-2008
    • Replies: 2
    • Views: 862
    04-08-2008 Go to last post

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