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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 linuxforums.org 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: 71,850
    01-11-2010 Go to last post
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  1. How to block flooding?

    During last 4 days, my machine's is under flooding. Today i install ntop. I make SS (in attachments) Right now i have 8 pages of that. Few hours ago...

    Started by AngelDeaD, 08-13-2012
    2 Pages
    1 2
    • Replies: 10
    • Views: 2,224
    08-27-2012 Go to last post
  2. IPTables configuration possibly causing trouble

    Hi, For one of my customers I'm running a web application on a RHEL 5 server. To protect against any intruders, I'm running iptables on this...

    Started by Lister432, 08-23-2012
    • Replies: 6
    • Views: 1,667
    08-26-2012 Go to last post
  3. Anti-virus scanning for T-bird

    Is there any way to get an addon built for T-bird that will scan emails and attachments and either get them Marked or Tagged if they're infected? I'm...

    Started by blaineclrk, 08-19-2012
    • Replies: 7
    • Views: 1,147
    08-23-2012 Go to last post
  4. Question How do I harden Ubuntu server?

    I'm using (nearly current releases of) Ubuntu Server (32bit and 64bit) although I might swap Ubuntu for a BSD later. The machines listen on an...

    Started by stormbind, 06-07-2012
    • Replies: 3
    • Views: 2,881
    08-22-2012 Go to last post
  5. Lightbulb Open Source Firewall with Four or More Red Interfaces

    Hi, I want to implement a Open Source firewall with four red interfaces (outside interfaces). The following firewalls comes to my mind 1....

    Started by amithad, 08-18-2012
    • Replies: 3
    • Views: 1,180
    08-20-2012 Go to last post
  6. Probably got hacked

    Hello, I have a machine running CentOS 5.3. There are many bad things happening on it, and I hope that someone can suggest me a solution. 1) I...

    Started by robycentos, 08-07-2012
    • Replies: 6
    • Views: 1,380
    08-20-2012 Go to last post
  7. What kind of programs use ICEauthority?

    I ask because I don't have a ~/.ICEauthority file in either of my two minimalist systems and so far none of my apps has complained about the lack of...

    Started by hazel, 08-12-2012
    • Replies: 3
    • Views: 1,266
    08-13-2012 Go to last post
  8. 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: 3,697
    07-27-2012 Go to last post
  9. 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: 993
    07-26-2012 Go to last post
  10. 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: 903
    07-25-2012 Go to last post
  11. [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: 1,863
    07-24-2012 Go to last post
  12. 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: 1,774
    07-11-2012 Go to last post
  13. 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: 768
    07-11-2012 Go to last post
  14. [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: 991
    07-01-2012 Go to last post
  15. 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: 2,321
    06-29-2012 Go to last post
  16. 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: 1,468
    06-26-2012 Go to last post
  17. 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: 731
    06-17-2012 Go to last post
  18. 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: 870
    06-15-2012 Go to last post
  19. 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: 1,526
    06-08-2012 Go to last post
  20. 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: 1,155
    06-07-2012 Go to last post

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