Security in terms of "computer security", such as protection of information, protection from theft or data destruction.

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54
votes
2answers
120k views

What is 1e100.net and why do I have TCP ports open to it?

I see my PC has TCP connections open to 1e100.net. Looking at the content this seems to be a Chinese site and I immediately feared the worst re viruses/malware. Then I checked the whois record and ...
24
votes
8answers
13k views

Linux keylogger without root or sudo! Is it real?

Somebody on Youtube claims to have a keylogger on Ubuntu that was neither executed nor installed as root. The link below shows a demo of it working. http://www.youtube.com/watch?v=Y1fZAZTwyPQ ...
13
votes
4answers
5k views

How to hide Browser Plugin Details in firefox for more privacy?

I'm trying to trick the results in this page to have more privacy/anonymity: https://panopticlick.eff.org/index.php?action=log&js=yes So far the best I could do is change the user agent, with the ...
12
votes
2answers
32k views

What is the difference between a proxy and a VPN?

There are several service providers out there that allow a user to circumvent firewalls or anonymize their web access. Some of them use proxies, some use VPNs. Most people say that VPNs usually work ...
38
votes
4answers
16k views

Which of the Windows updates are really necessary?

I downloaded a lot of Windows updates in the automatic mode. Are they all necessary? Can I remove some of them? How do we know which ones are necessary?
33
votes
6answers
36k views

scp to remote server with sudo

I have a file on server A (which is behind a NAT so not directly addressable). The file needs to be copied to server B in a directory restricted to root. I have an account on server B with sudo ...
22
votes
3answers
2k views

Subverting the execute flag on Linux systems. Why is this possible?

Whilst reading this, I found the following exploit: % cp /usr/bin/id ~ % chmod -x ~/id % ls -al ~/id -rw-r--r-- 1 edd edd 22020 2012-08-01 15:06 /home/edd/id % ~/id zsh: permission denied: ...
11
votes
5answers
128k views

Access denied even though I'm an Administrator?

My user account on Windows 7 is part of the Administrators group which has a full control permissions on C:\inetpub\wwwroot: However, when I try to create a folder in it, I get the "access denied" ...
8
votes
2answers
4k views

How does the “Steam” platform work? Is it DRM? Can I trust “Steam”-powered software? [closed]

UPDATE: This question lives on at gaming.stackexchange.com. So – I just bought the new game Supreme Commander 2. This question is not about the game, but about the online software ...
4
votes
18answers
920 views

Is free security software as good as paid security software? [closed]

I mostly use free security solutions to protect my home PC, but I wonder if I would get better protection from a paid solution. I prefer the free software, since I can have multiple applications ...
22
votes
3answers
4k views

Is it possible to store arbitrary data in an image file?

Is it possible to store arbitrary data such as documents or a program in the form of an image file, such as a PNG image? My concern is that someone could encode data for use by malware into an image ...
11
votes
2answers
11k views

Finding the physical local path associated with a Share UNC folder

Let's say I am Admin on a server named "Server1" and a share exists using the following UNC path \\Server1\Share1 If I remote to Server 1 and log in as Admin, how do I find the physical drive ...
10
votes
7answers
291 views

How to browse safely?

Just curious. What are the best practices and tools you use for safe Internet browsing? How to stay away from spywares, adwares etc? Update: For my work, I use Internet Explorer on Windows and ...
10
votes
7answers
1k views

Browser for paranoid people?

Is there a web browser out there that is more suited for paranoid people? Why would you choose it/ What feature would your ideal paranoia browser have? For instance i would want one which Sends NO ...
8
votes
8answers
25k views

Firefox: This connection is untrusted + Behind corporate firewall

I've seen some similar issues strewn throughout Google's results about this, but none seem to be corporate-specific. I continually get the 'This connection is untrusted' screen every time I attempt ...
5
votes
3answers
21k views

Find out if a PC has a TPM chip installed?

I have several Windows XP laptops that I need to check to see if they will work with Bitlocker if I install Windows 7. If they have a Trusted Platform Module (TPM) chip then Bitlocker should work ...
5
votes
5answers
999 views

Stopping kids from using a machine for illegal activites?

How do I stop someone using my computer from going to adult websites or from opening any inappropriate material like adult videos or images which may may come via pen-drives or CD/DVD? Is there any ...
4
votes
5answers
1k views

On unencrypted public wifi, what kind of real danger am I in?

First, my setup Windows 7 Home Premium use the built-in firewall UAC on max in Windows' wireless network settings for public networks, besides the default settings, I have 1)set to block all media ...
3
votes
1answer
3k views

NTFS: prevent/deny directory delete in a otherwise “personal” folder

I have a directory shared via CIFS from a Windows 7 "server". No domain: just simple workgroup. My clients access this directory via LAN via "Standard User" (no "Administrator") accounts on the ...
16
votes
10answers
117k views

Is there a way I can password protect a dropbox directory on my work pc?

I use dropbox a lot, and I'd like to start using my Dropbox account on my work PC, however I want to prevent anyone else from being able to access the files in my dropbox folder other than me on my ...
11
votes
3answers
16k views

Windows 7 equivalent for ntrights.exe

What is an equivalent for ntrights.exe on Windows 7? I need it to be able to be run from the command line.
8
votes
2answers
32k views

How to get the real IP address of someone using a proxy?

I was researching digital goods and security when I stumbled upon this company. One of the services they provide is "Real IP". They claim to be able to get the real IP address of users even when ...
7
votes
7answers
2k views

Looking for a USB Thumbdrive / Flash drive encryption solution (not TrueCrypt) [closed]

I am looking for a USB Thumbdrive / Flash drive encryption solution. I have searched the net but I have never come accross a solution which meets the following: Must handle at least 4GB volume If ...
4
votes
2answers
1k views

If I write all zeroes or ones to a hard disk, does that effectively and securely wipe it?

If I wanted to completely and securely wipe a hard drive, could I simply write all ones or zeroes (or even just random zeroes and ones) over the entire disk to clean it? It'd probably take forever, ...
4
votes
3answers
26k views

How do I remove Folder Ownerships? (Windows 7 & Windows XP)

In our house we have about 5 PCs; no DHCP Server or DNS Server. We have a few portable backup drives (Western Digital WD1001FALS 1 TB drives) that we mount to Thermaltake SATA drive readers. Any ...
3
votes
2answers
13k views

What is the Windows 7 command-line to remove all remember passwords in Credential Manager?

We can remove remembered/cached passwords via Credential Manager as here and via a command cmdkey as here. I want to have one command that quickly clear all the passwords. How can we do that?
3
votes
4answers
3k views

How do I create a bootable USB Flash PcRepair Kit?

I do PC repair on the side and am looking to use a bootable flash drive as a PcRepair Kit. I'm also looking for anit-virus, anti-malware, Data-Recovery, Hardware testing. It would be great if it was ...
0
votes
2answers
1k views

XP Suddenly asking for password [duplicate]

Possible Duplicate: Remove administrator password? Is there any sane explanation for a client's Acer Aspire 1 netbook, running XP Home SP 2, suddenly starting to ask for a login password at ...
16
votes
5answers
2k views

Is it secure to give someone my laptop with my Dropbox folder saved on it?

My laptop contains my Dropbox folder (under my account). I want to give this laptop to my friend for some time, and he will be using another account. Is it possible that: He will be able to access ...
14
votes
1answer
678 views

Why shouldn't we open an image in an email?

Most email clients do not display an image by default in the content of an email. But I don't understand this yet. How can displaying image job attack the computer?
11
votes
5answers
12k views

Is it possible to encrypt home folder on windows 7?

Ubuntu and MaxOS has an ability to encrypt home folder in case laptop is stolen. Is it possible to do same thing on Windows 7? I need to encrypt home folder so it will be encrypted and decrypted ...
10
votes
3answers
1k views

Do end users need to do anything about the Heartbleed security bug? What?

I see in the news about the “Heartbleed” security bug. As an end user, do I need to do anything about it?
7
votes
1answer
4k views

Automatically lock screen on lid close in Windows 7

I'm a longtime Linux user, and I just recently got a laptop that runs Windows 7. I recently stepped away from my workstation for a few minutes, and returned to find, to my horror, someone else sitting ...
7
votes
1answer
3k views

non-interactive ssh sudo… prompts for the password in plain text

I'm running some non-interactive ssh commands. The ssh authentication is taken care of fine through the ssh agent, but if I run a command that requires sudo then the password prompt in my terminal is ...
7
votes
5answers
4k views

can a virus execute by itself?

is there any type of viruses can execute by itself after download then on the HDD without clicking on it?? if there is ..... can you refer me to any sites about them?
5
votes
3answers
15k views

Is it safe to use my mobile headset on my PC?

Is it safe to use my mobile headset on my PC or laptop? Will it damage my audio chip or corrupt any driver? In this site it says computers 2 TRS connectors, one for speaker and another for ...
3
votes
2answers
215 views

Having no password on windows 7 log in physically, but with password through RDP

I am trying to make my main desktop be able to reboot right into the desktop without asking for a password, but I still want to be secure when I'm accessing it remotely. No one is ever going to ...
3
votes
4answers
660 views

How to shred already removed file on modern filesystem? (randomize free space, journal, tails, … securely)

Consider the following: mount | grep home ... type reiserfs ... rm -Rf /home/user/over_9000_little_and_big_super_secret_files/ # oops, I should have shredded it instead. How can I properly and ...
3
votes
6answers
2k views

a safer no password sudo?

Ok, here's my problem - Please don't yell at me for being insecure! :) This is on my host machine. I'm the only one using it so it's fairly safe, but I have a very complex password that is hard to ...
2
votes
3answers
3k views

difference between chmod 777 and chmod 007

What is the difference between chmod 777 and chmod 007? if 'others' means everyone, doesn't that strongly suggest the truth that chmod 777 = chmod 007?
2
votes
1answer
2k views

openSuse full disk encryption

I'm a proud Suser. I'm about to reinstall 12.2 on my ASUS N76VZ (UEFI x64 laptop). Since I'm very sensitive about laptop security against theft or unwanted inspection, I chose to use BitLocker with ...
2
votes
1answer
11k views

How can I disable the “Open File Security Warning” when I want to run downloaded executable files?

I would like to disable the "Open File Security Warning" that says "Do you want to run this file?" whenever I double click on an .exe I download. I have Windows 7 Home Premium, so I don't have the ...
2
votes
1answer
14k views

How can I get around “error 0x80070522” when creating files in the root of the C drive (C:\)?

One of our customers has just found a problem when trying to create a file on the root of the C Drive (C:\), on a Windows 7 Professional PC. I know they shouldn't be keeping files here, but there is ...
1
vote
2answers
701 views

How to properly wipe a hard drive prior to resale? [duplicate]

Possible Duplicates: Hard drive wiping? Erasing data before selling a computer I'm going to be selling a few old hard drives and was wondering what is the correct way to wipe these hard ...
0
votes
6answers
503 views

How do you setup your parent's computer? [duplicate]

Possible Duplicate: How can I make my mom’s Windows PC bullet-proof? How do you set up your parent's computer(s), if you're the on-call computer expert ? Do you recommend linux, ...
9
votes
4answers
759 views

Is it possible to safely contain a virus - not letting it spread?

I need to run a program, but I don't trust the author. I think it is infected with spyware or viruses, malicious files. I scanned it, did n't find anything, but still not feeling good about it. So I ...
9
votes
5answers
4k views

Are .docx or .pdf files potentially dangerous?

Just a general question of computer security - if I download a .pdf or .docx from an untrusted source, can it seriously harm my machine/give a malicious user access to my information? Or is it ...
7
votes
2answers
440 views

Prevent applications from opening browser

Is there a free application out there that will intercept requests from applications to open a URL and prompt me as to whether or not I want the URL to be opened? (For instance, after Adobe Reader ...
6
votes
3answers
4k views

Is there a way to secure a powerpoint presentation against edits?

I have a few powerpoint slideshows I need to distribute, but I would like the receivers to not be able to edit them. They still need to be able to launch embedded links though. It seems like this is ...
6
votes
3answers
2k views

Can a computer be infected by malware through web browser?

Can a computer be infected when it accesses a malicious web page? Why is not a web browser 100% safe? What web resources, such as Java Script, Flash or a HTTP connection, can infect a computer?