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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: 73,683
    01-11-2010 Go to last post
  1. iptables error

    I put this command in REDHAT 7.3 and iptables 1.3.0 #iptables -A OUTPUT -d -p tcp -j DENY it create the next error: ...

    Started by mrj, 03-11-2005
    • Replies: 1
    • Views: 1,450
    03-12-2005 Go to last post
  2. Two-factor authentication (aka, USB authentication in Linux)

    I would like to get/make a USB authentication program something like the one on:, but theirs is only for Windoze (AFAIK). Does anybody...

    Started by n0tt00elite, 11-29-2004
    • Replies: 2
    • Views: 5,055
    03-11-2005 Go to last post
  3. Help setting up a firewall

    Hi, I guess its time I set up a firewall! Kinda stupid for not doing it sooner.... Im runing slackware 10 (might be 10.1). I have iptables...

    Started by dark_lord_kodd, 03-08-2005
    • Replies: 1
    • Views: 1,479
    03-09-2005 Go to last post
  4. named information

    after 2 weeks activate snmpd & mrtg on my LAN server i have some curious message on my /var/log/messages here is part of the message Mar 2...

    Started by kamtono, 03-09-2005
    • Replies: 1
    • Views: 1,153
    03-09-2005 Go to last post
  5. wats the status of Packet Capture Mechanism in linux?

    Hi Wats the status of the paper "ncap: Wire-speed Packet capture and tranmission" ....what has been implemented in this till now? Sowmya

    Started by Sowmya, 03-09-2005
    • Replies: 0
    • Views: 1,500
    03-09-2005 Go to last post
  6. port related info

    Hi, I'm working on simulating a port scanner...... How do I open a port tht is previously shown closed? Also needed info on security...

    Started by anamikasoni, 03-06-2005
    • Replies: 0
    • Views: 1,246
    03-06-2005 Go to last post
  7. Starting guarddog

    Hello,To all Can someone here help me please after having a hard time trying to get G/D installed i think i did it but i have no idea how to run...

    Started by Dogit, 02-17-2005
    • Replies: 8
    • Views: 4,182
    03-04-2005 Go to last post
  8. password trouble

    i`ve installed SUSE 9.2 2 weeks ago,and today when i tried to log in..i typed my username,and my password,i know them for sure,and they were...

    Started by Tanya, 03-03-2005
    • Replies: 1
    • Views: 1,167
    03-03-2005 Go to last post
  9. help me to understand iptables logs

    Hello, My logs from iptables look like this: Feb 21 10:07:38 servername kernel: ***INPUT PACKETS***=>IN=eth0 OUT=...

    Started by ddaas, 02-23-2005
    • Replies: 3
    • Views: 3,917
    03-03-2005 Go to last post
  10. Restrict access to a Directory for a SINGLE user

    hi .. as the subject says, how do i do it ?? I'll explain my problem ... i am using vsftpd with LOCAL Login enabled. i hav two ftp dirs, : ...

    Started by prosen, 02-17-2005
    • Replies: 6
    • Views: 26,426
    02-28-2005 Go to last post
  11. How to check user rights ?

    Hi, Is there a tool/script that gives me a print of the total user information about there rights ? Like a blue-print of the total Linux security...

    Started by Birdy_the, 02-22-2005
    • Replies: 5
    • Views: 50,282
    02-25-2005 Go to last post
  12. method to authenticate devices

    Hi, I found out with great astonishment that a worker in the firm where I work as admin came with his personal Notebook and introduced it in the...

    Started by ddaas, 02-20-2005
    • Replies: 2
    • Views: 1,265
    02-25-2005 Go to last post
  13. Wireless Scanning in Linux

    People that use linux like to do their wireless network scanning passively by putting the card in "monitor" mode (aka rfmon). The problem is,...

    Started by Mord, 02-24-2005
    • Replies: 1
    • Views: 7,960
    02-25-2005 Go to last post
  14. Recover a previous version of a file

    Hi, I just spent ages building a new proxy server and getting ldap authentication to work against Novell Edirectory. I got it all sorted then...

    Started by NikTheGeek, 02-23-2005
    • Replies: 0
    • Views: 1,833
    02-23-2005 Go to last post
  15. what's the worst a regular user can do?

    I want someone to do some research on my server. So I give them permission via useradd, and then remove them later on. I never gave them super user...

    Started by samf, 12-13-2004
    • Replies: 4
    • Views: 1,553
    02-22-2005 Go to last post
  16. Open Ports

    so far i have managed to close all the other open ports, but how do i close these: PORT STATE SERVICE 111/tcp open rpcbind 631/tcp open ipp...

    Started by cvncpu, 02-20-2005
    • Replies: 2
    • Views: 2,728
    02-20-2005 Go to last post
  17. Legality of Encryption...

    i've just started playing with GnuPG and came across a reference that said certain 'levels' of encryption are illegal in some countries. i've tried...

    Started by PsypherPunk, 02-17-2005
    • Replies: 1
    • Views: 2,147
    02-17-2005 Go to last post
  18. Stealthy packet filter

    I want to set up a linux box to do some custom packet filtering. I would like to be able to plug it into existing networks, without the box needing...

    Started by ekiller200, 11-30-2004
    • Replies: 1
    • Views: 1,607
    02-13-2005 Go to last post
  19. How to stop arp response

    Im using redhat9 kernal 2.4.22 in a LAN, i want to stop arp request & response in my system. Any of you plz help... Regds VEnkatesh

    Started by aashikan, 12-03-2004
    • Replies: 5
    • Views: 7,553
    02-13-2005 Go to last post
  20. Control Program Access To Internet

    Is there are program/firewall that would allow me to control what programs/commands can access the internet? Sort of like ZoneAlarm for Windows. I...

    Started by helpmhost, 02-11-2005
    • Replies: 6
    • Views: 3,182
    02-13-2005 Go to last post

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