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

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3
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2answers
3k views

VirtualBox - Guest Addons as a security risk to the Host PC?

I'm setting up a Windows virtual machine in VirtualBox with the intent of using it as a sandbox for testing unknown or potentially dangerous applications. My question: would installing the Guest ...
22
votes
4answers
57k views

SSH: The authenticity of host <host> can't be established

What does this message mean? Is this a potential problem? Is the channel not secure? Or is this simply a default message that is always displayed when connecting to a new server? I am used to ...
45
votes
9answers
36k views

How to fix warning about ECDSA host key

I'm trying to setup password-less SSH on an Ubuntu server with ssh-copy-id myuser@myserver, but I'm getting the error: Warning: the ECDSA host key for 'myserver' differs from the key for the IP ...
1
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2answers
148 views

Allowing Wireless Clients Access To Your Network

Allowing Wireless Clients Access To Your Network I have company coming over and I'd like to offer my Wi-Fi connection Using my Airport Express without giving them my network password. I have an ...
0
votes
1answer
552 views

How to protect sudosh logs against deletion?

I'm using sudosh to ensure, among other things, that vendors who are given ssh access to my server can be held accountable for operations they perform on the server. sudosh is recording the logs very ...
3
votes
3answers
2k views

Can traffic be inspected through WiFi?

Let's say I am browsing an HTTP accessible web site (i.e. NOT HTTPS). Is the traffic encrypted through the WiFi connection? In other words, is there "data privacy" functionality over WiFi - ...
4
votes
1answer
10k views

How to embed image into Windows Live Mail (Win 7) email signature?

I have tried doing the steps here: http://www.timeatlas.com/email/general/create_image_signatures_in_windows_mail_or_live_mail However I don't like having to uncheck the "Block images" box in the ...
1
vote
2answers
1k views

Is it safe to cover LEDs on my fans with electric tape?

Just wondering. Some of these LEDs on my Antec 1200 case are kind of annoying since the computer is in my bedroom. Is it safe to cover these LEDs with electric tape? I've already done so for awhile ...
0
votes
1answer
110 views

Does Thunderbird's Extension Webmail Encrypts Passwords?

I've just set up my Yahoo Mail account to be checked from Thunderbird using it's webmail extension http://webmail.mozdev.org/ , and my concern is about security. I'm not sure how does this extension ...
1
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2answers
404 views

Use 2 Hdds in one pc as 2 different computers?

I want to have 2 totally different computers in one pc. I would like this to happen maybe with dual boot? I dont want the files from the one HDD to be accessible to the other because the one HDD might ...
-2
votes
1answer
666 views

Password protect USB flashdrive

I have 16 GB USB flash drive and using it for multiple purposes: As bootable Windows & Linux installation packages carriage (with http://www.sarducd.it) As PortableApps carriage What I need ...
3
votes
1answer
5k views

How to quickly Enable/Disable Internet Traffic so that it ONLY goes to ONE program?

What Firewall program (preferably free) can I use to quickly enable/disable internet traffic so that it only goes to one program? For example, sometimes I need only one program (Program X) to be ...
0
votes
2answers
317 views

Nmap -oG output

I've read about the -oG and tried it out, but it seems to not to working for me... SO basically I'm trying to scan for a port range, lets say for example 2.8.0.0 – 2.15.255.255 and for a list of for ...
1
vote
0answers
346 views

USB mouse doesn't work after I installed Kaspersky

I have a problem with my USB mouse: it doesn't work. This happened after I installed Kaspersky. Do you know any possibility to activate again my mouse? I don't want to reinstall my XP system. Thank ...
0
votes
2answers
6k views

Can we get a virus by allowing an External Protocol Request in Chrome?

Is it safe to click Launch Application upon clicking a bittorrent "magnet link"? : Could I get a virus by doing so? How safe is this compared to manually downloading the .torrent file to harddisk ...
1
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1answer
282 views

Use of multiple keyfiles for TrueCrypt

As mentioned in documentation, TrueCrypt would use first 1024 kilobytes of any large file to create SHA-512 Hash which will be combined with password to get the final hash. E.g. ...
0
votes
0answers
204 views

Secure sync of TrueCrypt containers on Windows XP

Need to sync arbitrary files within two TrueCrypt containers; one container is a backup, the other the one actively used by me, both are local during the transaction. Current concern security wise ...
1
vote
1answer
794 views

Is there a way to lock folder and all files inside for specific time?

Is there a way / tool to lock folder and all files inside for specific time to prevent any other program on PC to perform any actions? Something like anti-Unlocker tool for Windows. I use Windows ...
2
votes
1answer
6k views

How can I stop my computer from doing arp poisoning attacks?

I have a small LAN in my home about 4 - 5 computers. The problem is that when there are usually 3 or more pc's online we keep losing the Internet access randomly about every 2 minutes. So we took a ...
1
vote
1answer
259 views

Windows: How can I reproduce exactly the same blank-password security but with non-blank password?

Having read in Set a Blank Password in Windows XP To Protect the Computer from Internet Attacks : "Using a blank password (or no password at all) makes your computer more secure because Windows ...
1
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2answers
3k views

Are the losses of resetting a Windows password reversible?

In Windowses (XP SP3, Windows 7, et al), setting Windows' login/account/user password by: Run --> Compmgmt.msc --> Local Users and Groups --> Users --> Right Click on a user in right panel ...
0
votes
0answers
683 views

Disable Protected mode in Internet Explorer Security options

I need a small help to disable the protected mode in IE 8. Here is my scenario. I have admin rights on my machine, but I am not able to disable Protected mode. When I Run IE as Administrator also, I ...
0
votes
1answer
384 views

What are the security implications of doing “chmod a+rx ~/Documents”?

In order to get the Apache in Mac OS X Lion to work with symlinks, I had to follow the instructions on this page: https://discussions.apple.com/thread/1771399?threadID=1771399 One of the things I ...
0
votes
3answers
246 views

SSH passwordless authentication failure

I am trying to ssh two machines and I would prefer to use keys generated for authentication rather than password. This will enable me to automate port-forwarding and many other things. Note: My ...
2
votes
0answers
811 views

John the ripper - not showing cracked passwords

I am using jtr to perform an audit on our admin passwords. It's cracked a few which showed on the screen, however when I try and get them to show again with the --show command, it says it hasn't done ...
1
vote
2answers
511 views

Is there any benefit to full disk encryption if I always leave my PC on?

As I understand it, full disk encryption encrypts all data on a HDD and protects that data with a password. If I turn my PC off and it gets stolen, all my data, passwords etc. are protected. But I ...
2
votes
1answer
519 views

Why is it even possible to overwrite the boot sector

Why is it possible to overwrite the boot sector so trivially in Windows? I just had a little coding accident involving writing to a raw physical disk, and I messed up the arithmetic and ended up ...
1
vote
2answers
703 views

Was my MacBook hacked if I have PuTTY host keys in my home directory?

.putty/randomseed and .putty/sshhostkeys were found in my home directory of my MacBook Pro this morning. I'm running OS X Snow Leopard. I've never installed PuTTY on my machine. Does this mean my ...
1
vote
3answers
1k views

TrueCrypt Rescue disk - security hazard?

I wonder if TrueCrypt rescue disk even makes sense to keep. Lets assume for a second there is a corruption on the disk. Rescue disk will not help here, because the data is invalid anyway. But on the ...
3
votes
5answers
2k views

taskmgr.exe is asking permission to connect to 66.152.109.110

taskmgr.exe is asking permission to connect to 66.152.109.110. I am using windows 7. Is it normal? Is my machine infected with malware? Thank you!
1
vote
3answers
989 views

Prevent write access for root in home directories

Is there a Linux distribution that prevents root user from modifying/deleting files/directories in another user's home? I came across tools that allow the home directory to be encrypted. But I want ...
0
votes
1answer
383 views

Disable Profile Creation on Firefox

Is it possible to disable new profile creation in Firefox? Or password protect new profile creation? The problem is there is no point in installing say site blocking add-ons because anyone can create ...
2
votes
3answers
63 views

Terminal: login(1) or su(1)?

I am on OSX. Can use both login(1) or su(1) to login as any user. But, two binaries to make the same job?? Which one consumes less system resources? Which one is less prone to security risks? ...
0
votes
1answer
108 views

Am I safe on Windows if I continue like this? [closed]

Of all the available tons of anti-malware software for Windows all over the internet, I've never used any paid solution(I am a student, I have no money). Since the last 10 years, my computers running ...
12
votes
4answers
2k views

Encrypted WiFi with no password?

Is there any standard that allows a WiFi connection to be encrypted, but not require a password? i know that (old, weak) WEP, and newer WPA/WPA2 require a password (i.e. shared secret). Meanwhile my ...
4
votes
1answer
432 views

is it possible to monitor and log “read from Windows clipboard” events?

processes like Notepad or browser have legit reasons for accessing clipboard in short bursts, typically associated with keyboard and mouse activity. The vast majority of processes have no business ...
4
votes
3answers
22k views

How to block incoming connections from one IP address?

I have found out that one IP address is trying to RDP to a machine. I would now like to get XP to block all incoming connections from this IP address, and I am finding it very frustrating how ...
0
votes
1answer
1k views

Simple way to set up port knocking on Linux?

There are well known benefits of Port Knocking utilities when utilized in combination with firewall IP table modification. Port Knocking is best used to provide an additional layer of security over ...
0
votes
1answer
266 views

Checking for keylogger/trojan/spyware on OS X

I have enabled hidden files, ran netstat to observe active connections, and I am running Clamxav. Anybody know any other tricks or ideas to find anything hiding? This is a client's machine. It ppears ...
2
votes
5answers
4k views

Most secure way to access my home Linux server while I am on the road? Specialized solution wanted

I think many people may be in my situation. I travel on business with a laptop. And I need secure access to files from the office (which in my case is my home). The short version of my question: ...
0
votes
1answer
630 views

Signed Binaries in Windows

Is there a way to prevent Windows from ever running an unsigned binary? I realize that this would be a major pain from a user's perspective, but is there such of a mechanism in windows that would hold ...
2
votes
1answer
2k views

Windows 7: Open File - Security Warning box appears for every app on the desktop

Whenever I double-click to open an executable on the desktop (.exe, .bat, etc.), or a shortcut on the desktop that points to an executable, the "Security Warning" pops up and asks me "Are you really ...
3
votes
1answer
532 views

Security risks with autocomplete

I've heard of websites that have autocomplete fields that aren't visible, so extra information is captured when a user uses autocomplete (ex. a hidden address field, that is only filled in with ...
1
vote
1answer
79 views

From Security Perspective, Windows 7 with MSE is equal with Windows 8 with Windows Defender?

I just install an ubuntu in my laptop, but for some reason, I need to use windows sometimes. I am wondering that I should buy a windows 7 right now or waiting for the windows 8 which would be released ...
1
vote
2answers
92 views

what constitutes out-of-band access to a server?

The first time I access my server with a new installation of Filezilla or Putty, I will get prompted that I should continue only if the RSA key shown to me is correct. The cloud provider has advice ...
1
vote
1answer
30 views

Is it possible to change content of a file residing on other server using HTTP 1.1 features?

Let's say we have a file on server which have all permissions 777. Is it possible to make a script, situated on other server than the file to modify. The script uses HTTP 1.1 protocol features only to ...
2
votes
1answer
1k views

How Secure is MMS Messaging [closed]

I recieved a few MMS messages from a friend containging confidential documents as he didnt have internet access where he stayed for a project. How secure is it? can anyone in the IT department of the ...
3
votes
4answers
43k views

Google chrome not accepting any security certificates

I've recently developed a problem with Google Chrome that's really annoying. I'm using Firefox at the moment with no problems whatsoever and it's the same with IE, so it's safe to say this problem is ...
3
votes
1answer
550 views

Is there a utility to verify the checksums of every Windows file?

I would like to know if there is a utility to verify the checksums of every Windows file on my Windows 7 Ultimate system. It seems on the surface such an obvious utility but I don't ever remember ...
2
votes
2answers
400 views

OSX - Update “Java for OS X 2012-002” is not mentioned on support.apple.com, is this ok?

Straight after installing "Java for OS X 2012-001" Software Update asks me to install "Java for OS X 2012-002", which has the exact same size (66.6 MB) and description (including the same two links: ...