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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: 73,273
    01-11-2010 Go to last post
  1. Change file permissions recursively (but not affecting directories)

    Hi Is it possible to change file permissions recursively (let's say to 600) without affecting permissions of the directories where the files are...

    Started by mpblue, 07-27-2005
    • Replies: 5
    • Views: 36,766
    05-27-2009 Go to last post
  2. Folder Permissions for Two Users

    I have a server running SLES 10.1 and using pure-ftpd. I need users to have access to specific folders. When the user connects via FTP to the server,...

    Started by zerowizard, 05-22-2009
    • Replies: 4
    • Views: 2,164
    05-26-2009 Go to last post
  3. iptables: No chain/target/match by that name

    Hi, I have a perl script which runs the iptables chain below everytime a UDP flood is detected originating from within the network. I want to...

    Started by billy_bass26, 05-26-2009
    • Replies: 1
    • Views: 9,060
    05-26-2009 Go to last post
  4. changing warning mesage or emailing it

    Hi friends I have a small problem I want to take you opinion in it, I did a password restriction for all users in my server using PAM modules...

    Started by reakyrok, 05-22-2009
    • Replies: 1
    • Views: 804
    05-22-2009 Go to last post
  5. Desperately Seeking Help Linux/Windows knowledge -- Sanity at Stake

    Hi. The above title is a little dramatic I realize, but it is nonetheless close to the truth. In fact, this is the second forum from which I have...

    Started by ConnorX, 05-19-2009
    2 Pages
    1 2
    • Replies: 15
    • Views: 2,947
    05-21-2009 Go to last post
  6. Exclamation bots or hackers ?

    From awstats of my website -- i can see someone (robot?) trying to access following links which i don't have. /m/ /wap/ /cgi-sys/India ...

    Started by Lakshmipathi, 03-19-2009
    2 Pages
    1 2
    • Replies: 17
    • Views: 6,043
    05-19-2009 Go to last post
  7. ebtable:BridgeFirewall that allowsSSH in, and allows http/https out, but nothing else

    I'm trying to make a bridge firewall that allows ssh in, and allows http/https out, but nothing else... ebtable ruleset isn't working :( This is...

    Started by debianfirewall, 05-18-2009
    • Replies: 0
    • Views: 4,355
    05-18-2009 Go to last post
  8. user login

    Hello, I am having 18 servers which 50 users are accessing,from some days we are facing issues such as somebody deleting few files from server.Is...

    Started by rishi_nandedkar, 05-15-2009
    • Replies: 1
    • Views: 1,087
    05-16-2009 Go to last post
  9. need some advice on Installing Tripwire

    Dear all, I'm totally new to Linux and start to learn more about Linux. Here i need some advice on Installing Tripwire. I have uploaded...

    Started by ChongAik, 04-30-2009
    • Replies: 2
    • Views: 1,407
    05-09-2009 Go to last post
  10. Question System Groups from Users and Groups

    I am not sure where this thread goes so I put it here. I have done a lot of research and keep coming up empty and this includes browsing books at...

    Started by measekite, 05-05-2009
    • Replies: 1
    • Views: 837
    05-09-2009 Go to last post
  11. Security breach: Display

    I have reason to believe a malicious user knows my IP address and is accessing my machine and its display remotely. Is there any way to check for...

    Started by cornhenge, 05-06-2009
    • Replies: 3
    • Views: 986
    05-09-2009 Go to last post
  12. To add and remove iptables rule

    Hi folks, Ubuntu 8.04 To input a rule whether run; $ sudo iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT Then run;

    Started by satimis, 05-03-2009
    • Replies: 5
    • Views: 17,352
    05-09-2009 Go to last post
  13. Iptable not rejecting IP

    the two IP I am rejecting are still getting thru what am I doing wrong? Centos 5 Chain RH-Firewall-1-INPUT (2 references) target prot opt...

    Started by bjfreeman, 05-05-2009
    • Replies: 6
    • Views: 1,292
    05-08-2009 Go to last post
  14. XFRM policy Update event for Inbound Policy

    Hi All, I am looking for Policy update notifications from the XFRM during the IPSec Re-keying. I look for the "XFRM_MSG_UPDPOLICY" event. The issue...

    Started by kjmurthy, 05-05-2009
    • Replies: 0
    • Views: 1,482
    05-05-2009 Go to last post
  15. Can I be comfortable with Linux Security

    Hello, I'm relatively new to the Linux scene and I'm in the process of setting up a webserver using Apache 2 on the latest release of Ubuntu 8.10....

    Started by brer, 04-15-2009
    • Replies: 6
    • Views: 1,175
    05-02-2009 Go to last post
  16. Set iptables rules from Kernel Module

    Hello, I am developing kernel that set the iptables rules based on some data detection by my kernel module. I could not figure out how to set...

    Started by schokshi99, 04-28-2009
    • Replies: 0
    • Views: 1,049
    04-28-2009 Go to last post
  17. Rootkit? - Chkrootkit Result

    I get this when I run chkrootkit: Checking `chkutmp'... The tty of the following user process(es) were not found in /var/run/utmp ! ! RUID ...

    Started by Greg988, 04-25-2009
    • Replies: 7
    • Views: 16,088
    04-28-2009 Go to last post
  18. time limit of parental control

    How to set the time limit for my little child on Centos 5.2? (the easiest way) Time limit per day/wk/mth ? (eg.1hr 25min/day, diff on Sat & Sun)...

    Started by sf433, 04-27-2009
    • Replies: 2
    • Views: 7,262
    04-27-2009 Go to last post
  19. iptables dyndns etc..

    any help please..... Linksys 54gl PPOE- dlink modem-bridge mode.One PC NIC static IP - eth1.PC is share server, ports are forward in router and are...

    Started by satrix, 04-26-2009
    • Replies: 0
    • Views: 936
    04-26-2009 Go to last post
  20. netstat -e and root

    Hi guys I got a little question about the output from netstat. I was looking through the man page when I came across the -e switch. I used it a...

    Started by the bassinvader, 04-15-2009
    • Replies: 2
    • Views: 2,537
    04-24-2009 Go to last post

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