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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: 66,574
    01-11-2010 Go to last post
  1. Snort UpnP Alert on Ubuntu

    I am using Ubuntu 11.04 and have just started using Snort!. (I installed the latest version of Snort! a couple of months ago.) When I run the...

    Started by OtagoHarbour, 01-22-2013
    • Replies: 3
    • Views: 2,278
    01-23-2013 Go to last post
  2. Access to private web site without login/password - How to implement?

    I run a totally private website. Any visitor immediately gets login/password prompt, which is implemented at the webserver level (nginx). There's no...

    Started by latgarf, 01-18-2013
    • Replies: 4
    • Views: 3,609
    01-21-2013 Go to last post
  3. iptables; match and protocol question

    Below, what is the difference between using -m to specify a tcp match as well as -p to specify tcp protocol instead of just using -p to specify the...

    Started by quovadisnp, 12-21-2012
    • Replies: 4
    • Views: 867
    01-18-2013 Go to last post
  4. md5 checksum validation inconsistent

    Hi, I downloaded a Debian (Wheezy) installer iso image and burned it to a CD. After burning the CD I mounted it and ran the md5sum utility to verify...

    Started by OverBoard, 01-17-2013
    • Replies: 2
    • Views: 1,091
    01-18-2013 Go to last post
  5. selinux: domains and types

    I've been reading up on selinux and there is one thing I have thus far been unable to find out. I suspect I am not searching for the correct things....

    Started by elija, 01-15-2013
    • Replies: 2
    • Views: 723
    01-16-2013 Go to last post
  6. [SOLVED] iptables -- ip address range switch not working.

    I have the following in my iptables script: /sbin/iptables -A INPUT -p udp -m udp -s --dport 10000:20000 -j ACCEPT when I run it...

    Started by ajnabi, 01-07-2013
    • Replies: 1
    • Views: 2,397
    01-07-2013 Go to last post
  7. Winbind with Kerberos Woes

    I hope this is the right forum for this issue, but please move it if not. I've been given the task of integrating some Red Hat Enterprise...

    Started by YTee, 12-18-2012
    • Replies: 3
    • Views: 1,744
    01-03-2013 Go to last post
  8. how to change root permission directory....??

    how can i make that the root and user account cant access the some folder..?? even i set the user permission to lock the folder but the root still...

    Started by krool89, 10-20-2012
    • Replies: 3
    • Views: 950
    01-01-2013 Go to last post
  9. System Access best practices - Admin/Monitoring web apps imap etc

    Hi all - I'm looking for some best practices ideas - I have a Centos 5.5 system (soon to be upgraded to 6.3) It has a public IP on it, and...

    Started by treimers, 12-22-2012
    • Replies: 2
    • Views: 841
    12-22-2012 Go to last post
  10. Webscarab to debug remote proxy

    Hello ! I would like to know how to connect Webscarab to my remote test proxy. I'm testing a web app with some beta testers and I would like to start...

    Started by chroma, 12-19-2012
    • Replies: 0
    • Views: 618
    12-19-2012 Go to last post
  11. Having an admin account in Debian and Ubuntu

    Hi! I'm working in a research center that has no IT expert, so I'm trying to help out researchers with their computer problems, as I know a bit more...

    Started by Viandante, 12-07-2012
    • Replies: 6
    • Views: 1,084
    12-14-2012 Go to last post
  12. n00b iptables question.

    I am setting up a new squid daemon to run on my server. I want to make sure that everyone inside my network can access squid but I want to make sure...

    Started by AsherSevyn, 11-30-2012
    • Replies: 4
    • Views: 1,200
    12-10-2012 Go to last post
  13. Can't shut down systemd without going to root

    I am in the process of migrating my AntiX partition to systemd, which I used previously in Arch. I can boot with it but I can't shut down in my own...

    Started by hazel, 11-19-2012
    • Replies: 3
    • Views: 1,101
    12-08-2012 Go to last post
  14. Unhappy Bouncing spam sent 'from localhost' on my server (Qmail)

    Hi all, My server seems to be abused for a rather elaborate way of relaying spam despite being a closed-relay server. The trick is that messages...

    Started by maurits, 12-04-2012
    • Replies: 2
    • Views: 2,042
    12-04-2012 Go to last post
  15. Question How to stop Spam from my server? Please help

    Hi, I am a newbie and have run into a problem on my LAMP stack. The server is running Linux 2.6.18 with Plesk 10.3.1 I have looked everywhere...

    Started by maxs, 11-10-2012
    • Replies: 1
    • Views: 1,371
    11-11-2012 Go to last post
  16. Looking for information on iptables

    So I have my first CentOS server for a personal website and I wanted to block a certain IP address. I was wondering If I add the rule # iptables...

    Started by jwele, 11-02-2012
    • Replies: 5
    • Views: 944
    11-05-2012 Go to last post
  17. Userspace SPI without root privileges

    Hi all, My first post around here so please excuse me for all my wrongdoings against the forum etiquette in advance. I would have to create...

    Started by mjsv, 11-01-2012
    • Replies: 0
    • Views: 633
    11-01-2012 Go to last post
  18. Lightbulb [SOLVED] ICMP Port Numbers

    Hi, In my Ubuntu desktop I implemented Gufw 11.10.2 Firewall GUI. I have secured my firewall by DENYING all incoming and outgoing traffic and...

    Started by amithad, 10-11-2012
    2 Pages
    1 2
    • Replies: 10
    • Views: 4,270
    10-17-2012 Go to last post
  19. Lightbulb Network Outburst Monitoring

    Hi, Recently I was in troubled waters hence my network is under some kind of a flooding attack where the time value of ping went over 1024 for...

    Started by amithad, 10-16-2012
    • Replies: 0
    • Views: 583
    10-16-2012 Go to last post
  20. WHM server hacked, lost root access

    I have a huge problem. In a nut shell, 2 days ago I noted a strange process going on with httpd, something I never saw before. That then led to me...

    Started by linkandzelda, 10-10-2012
    • Replies: 5
    • Views: 1,538
    10-11-2012 Go to last post

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