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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: 66,486
    01-11-2010 Go to last post
  1. UPnP required, but can't set firewall rule since port keeps changing

    I just started using jitsi the other day. It is advertised as a more secure alternative to skype. Apparently it requires UPnP to be turned on in my...

    Started by nomadicME, 07-25-2012
    • Replies: 6
    • Views: 3,102
    07-27-2012 Go to last post
  2. How to secure a samba server on a domain

    We have a server for backups that runs Samba. Anyone on the domain can access it by going to \\backups. Is there a way I can restrict access through...

    Started by abefroman111, 07-26-2012
    • Replies: 1
    • Views: 867
    07-26-2012 Go to last post
  3. Question SELinux Policy Creation

    I've just recently gotten into the Linux world about six months ago in our RHEL5 environment. Most of our servers that were provisioned over 18...

    Started by Xeln, 06-22-2012
    • Replies: 2
    • Views: 838
    07-25-2012 Go to last post
  4. [SOLVED] fail2ban responding to attacks even though all hosts are blocked

    I recently checked my /etc/hosts.deny file and found there were hundreds of entries of the form ALL: <ip address> presumably added by fail2ban....

    Started by Xander314, 06-30-2012
    • Replies: 6
    • Views: 1,755
    07-24-2012 Go to last post
  5. Urgent Help: Need to Restrict Ftp on WAN Allow only on LAN

    Hi Friends, We are using Centos 6, in our system two Ethernet Cards are used one for LAN Access and another one for WAN internet. We are used for...

    Started by kavirajan, 12-22-2011
    • Replies: 4
    • Views: 1,665
    07-11-2012 Go to last post
  6. Tweaking SSL/TLS configuration

    Basically I am trying to use TLS to encrypt traffic for services on my own LAN. I created a "certificate authority" so that the TLS certificates...

    Started by bleedingsamurai, 07-02-2012
    • Replies: 1
    • Views: 710
    07-11-2012 Go to last post
  7. [SOLVED] Popular tools for file encryption

    I have some files and possibly directories that I would like to protect with encryption. I wasn't really looking for full disk encryption, but rather...

    Started by bleedingsamurai, 06-23-2012
    • Replies: 4
    • Views: 907
    07-01-2012 Go to last post
  8. DDoS Attack Help ( incl. PCAP file )

    hello guys, I really need help on my dedicated debian server ( not a webserver ) We're experiencing a DDoS attack which overloads our RAM and...

    Started by williebillie, 06-29-2012
    • Replies: 2
    • Views: 1,945
    06-29-2012 Go to last post
  9. 2 Questions!!

    Rkhunter issued warnings about hidden directory files in etc and dev; how do I find them please? Has anyone heard of the " classpath security "...

    Started by cousinlucky, 06-25-2012
    2 Pages
    1 2
    • Replies: 10
    • Views: 1,382
    06-26-2012 Go to last post
  10. Apache 2 Modules

    I am running Apache 2.4 on CentOS 6.0 and I'm trying to improve the performance and security of Apache. I noticed in the config file there are a...

    Started by LinuxAndy, 06-14-2012
    • Replies: 1
    • Views: 667
    06-17-2012 Go to last post
  11. Apache2 Config

    I have setup apache2 on a new VPS. The server has 1 IP address but I am hosting 2 websites from it. The websites work fine but when someone enters...

    Started by LinuxAndy, 06-14-2012
    • Replies: 3
    • Views: 799
    06-15-2012 Go to last post
  12. block ipcop outgoing ports

    hello, how i can block all outgoing ports on the main firewall of ipcop to enforce users to use proxy. do i need additional addon!!! Thank you

    Started by abdullah1, 06-03-2012
    • Replies: 1
    • Views: 1,309
    06-08-2012 Go to last post
  13. How to block ethernet card access to an user in RHEL

    Is there a possibility to block access to ethernet card (say eth0) to block network access for an user? And how it can be done? If above is not...

    Started by vnykr, 06-07-2012
    • Replies: 3
    • Views: 1,011
    06-07-2012 Go to last post
  14. [SOLVED] my root password

    I have forgot my root password on my Ubuntu system, does anyone have any ideas?

    Started by Garrett85, 06-02-2012
    • Replies: 2
    • Views: 960
    06-02-2012 Go to last post
  15. proxy on ipcop

    hello, how i can block all internet access for ipcop and force all users to use proxy in order to get access to internet. Thank you

    Started by abdullah1, 05-31-2012
    • Replies: 1
    • Views: 1,007
    06-01-2012 Go to last post
  16. Using portable drive with GPG

    I have a public/private key pair. I have the private key on a hardware AES encrypted USB drive. I can download the encrypted files on any computer,...

    Started by jordan4501, 05-29-2012
    • Replies: 3
    • Views: 1,106
    05-30-2012 Go to last post
  17. Exclamation iptables string icase syntax

    My system : CentOS 6.2 64bit and iptables-1.4.7-5.1 I want use iptables string module to block some http request . I want to block some...

    Started by robbtek, 05-21-2012
    • Replies: 0
    • Views: 1,212
    05-21-2012 Go to last post
  18. Angry DDOS from my server, 2nd time

    Hi, I have a CentOS 5 server running OpenVZ that has been used in an attack for the second time in the last month. Today is the second time the...

    Started by ThomasD, 04-30-2012
    2 Pages
    1 2
    • Replies: 10
    • Views: 3,726
    05-17-2012 Go to last post
  19. Question Mini Firewall Hardware

    I'm interested if anyone has come across or has implemented a 'mini' hardware firewall along the lines of the Raspberry Pi - a minimal board with 2...

    Started by Dharmaseals, 05-13-2012
    • Replies: 1
    • Views: 2,543
    05-14-2012 Go to last post
  20. OpenVPN makes other ports visible?

    I have a question about security, I'm wondering if anyone here knows. Recently I was experimenting with OpenVNP, and was running a VPN server off...

    Started by cclauson, 05-07-2012
    • Replies: 7
    • Views: 1,880
    05-08-2012 Go to last post

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