The protection of computer systems and information from threats such as theft or data destruction.

learn more… | top users | synonyms (1)

9
votes
6answers
8k views

Port scan revealed port 1111 open. What is it?

I am new to systems administration and have a new server running a website with http (at port 80), https (at port 443) and ssh (at port 22). I did an nmap port scan using my personal laptop and other ...
8
votes
2answers
2k views

What does Trusteer Rapport do?

Recently, both of my banks have been trying to foist Trusteer Rapport on me when accessing their online banking services. I haven't downloaded it because I can't figure out what it actually does, and ...
6
votes
1answer
8k views

Run unsigned Java applets

Basiclly the same question as Allowing unsigned Java applications on all sites, but for Java 8, where I get the pleasure of seeing this screen: Unsurprisingly, this breaks things for me. Is there ...
6
votes
3answers
2k views

Block domain, website, without waiting for localhost (hosts)

There is a related question here. I can use Administrator, install extra software, whatever needs to be done. My problem is: I can't block websites entirely. Like in AdBlock Plus, you add a rule ...
6
votes
1answer
4k views

Using a decoy operating system, with another OS hidden by TrueCrypt?

TrueCrypt provides an option to use a hidden operating system. This works by having a decoy operating system residing on partition 1, and using partition 2 as (encrypted) data storage for the decoy OS....
5
votes
2answers
2k views

How can I prevent file copy in my usb stick?

I want to prevent other users of copying my files from my usb stick. Is there any method to do that?
5
votes
3answers
801 views

How Wifis and wifi security work?

I see tons of videos dealing with WEP cracking, but actaully none of them teach about how Wifis work. They are just a bunch of commands thrown at the screen. Where can I learn about the inner ...
5
votes
1answer
2k views

Easy way to transfer a private key to another machine?

ssh-copy-id makes it easy to transfer a public key to a remote machine. Is there any equivalent tool for moving a private key? update Don't do this! (see answer)
5
votes
2answers
4k views

Trusted Root certificates regularly disappear on Windows 7

I've installed several self-signed certificates on my Windows 7 Ultimate x64 machine for development purposes. One was installed into Trusted Root CAs and 2 were installed into My Certificates and ...
5
votes
2answers
1k views

I want to make Macintosh Security Settings Location-Aware and Automatic

I have a Macbook Pro that I take from home to work to coffee shops to hotels. When I am at home, I want it to not require a password except after 4 hours of inactivity. When I am traveling, I want it ...
5
votes
6answers
1k views

Secure setup of home wireless network

How to configure home wireless network to ensure that it is sufficiently secured and at the same time its usability is not restricted. EDIT Just to clarify by "usability is not restricted" I meant ...
5
votes
3answers
3k views

Can 'Switch User' in Windows 7 work with Active Directory?

In Windows 7 you can 'Switch User' to anyone who's been configured locally on the machine. Can this be extended to allow someone to switch to a user defined in Active Directory (the same directory ...
4
votes
1answer
8k views

Can I stop windows from “Blocking” zip files

When downloading a zip file from the internet, Windows "blocks" it. By that I mean I have to right click>Properties>and click unblock. Is there a way to stop windows from doing this?
4
votes
3answers
3k views

How long will Microsoft support Windows XP Professional?

I am using Windows XP Professional for some specific software programs. Now I read in the latest German CT-Magazin that Microsoft will fix big security problems until 2014. At microsoft.com is spoken ...
4
votes
2answers
75 views

Could merely visiting a web site push a root CA as trusted onto my PC?

This is a follow-up question to this other question, which is about Google decision to start distrusting a specific Symantec Root CA certificate. Microsoft on another hand has not made (yet) any ...
4
votes
2answers
1k views

Is it possible/good practice to use same private key for two servers for passwordless login from the same workstation/localserver?

I have two websites. One website is a clone of the other website. When I checked the sshd_config file in both the sites they are exactly similar, except one uses authorized_keys as the identification ...
4
votes
2answers
942 views

My Mac trying to connect to a possible intruder's machine, that is not in the network anymore

I just asked a question I think someone else has access to my wireless network. What next?. I have changed wireless security to WPA2, changed the password, disabled file sharing etc as =suggested in ...
4
votes
4answers
680 views

How to hide a code from myself until a specified time?

Essentially, what I need is some way to generate and store a random string (20 characters long, say) for some period of time, such that there is no way for me to recover the string until the end of ...
4
votes
2answers
650 views

Are WiFi transmissions over an open network encrypted?

By "open" I mean the router does not require a password to connect.
4
votes
2answers
1k views

How to set the default file permissions on ALL newly created files in linux

My question is similar to this: http://stackoverflow.com/questions/228534/linux-default-file-permission but there is no scp/ftp client involved and that question looks abandoned. Simply put: I want ...
4
votes
1answer
533 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 ...
3
votes
2answers
4k views

Windows Vista: Open file - security warning on local exe: “Unblock” does *not* work - why?

I use Process Explorer on a Windows Vista (Business 32bit) box. I have extracted the files from the zip file to C:\Program Files\Process Explorer. Every time I open the executable (procexp.exe) I get ...
3
votes
2answers
10k views

Encrypting a user's directory in Windows 7

I'm running Windows 7 Professional. Is there any way to make a user's directory (anything under C:\Users\Foo) encrypted? I'm looking for something like Apple's FileVault feature. When I login as an ...
3
votes
2answers
918 views

Copy-proof flash drive

I'm looking for a solution that make it possible to make a flash drive which protects the data from being copied so that the data is data could be "played" only The main aim for the flash drive is to ...
3
votes
2answers
3k views

How to split two networks for one Internet connection

I have a single Internet connection and I'd like to create two networks to access it. Network #1: WiFi accessible Network #2: Wired, not accessible from Network #1, but can still get to the Internet ...
3
votes
1answer
142 views

Removing previously type commands at a remote server

I am ssh'ing into a remote server and then su'ing to root. The problem is that sometimes, I have not paid enough attention to the console message, and I have accidentally typed in the root password ...
3
votes
1answer
491 views

Is it possible to change the background behind the OS X login box screen saver unlock?

I have my Mac configured to require a password when it goes to sleep or when the screen saver comes on. When I wake it up I'm presented with a login box and the screen behind it is flat black. I would ...
3
votes
2answers
11k views

Event 4797 “An attempt was made to query the existence of a blank password for an account”

On my Windows 8.1 desktop, I see a lot of messages like this from lsass.exe in the Event Viewer's audit log: An attempt was made to query the existence of a blank password for an account. Subject: ...
3
votes
1answer
3k views

found a bunch of DO_NOT_TRUST_FiddlerRoot personal certificates installed on my system

I was looking at my personal certificates in Google Chrome and found a bunch of DO_NOT_TRUST_FiddlerRoot certs there. I don't know how these got there. Should I be concerned?
3
votes
1answer
80 views

Password management at an organization [closed]

In my company we have a largish number of secure logins, currently all stored in a single KeePass database which some of us share the keys to. We'd like to have a more fine-grained, identity-based ...
3
votes
1answer
440 views

How does SSL work? Isn't there a hole?

I was reading this article, specifically the "SSL in action" part. It says: When Client connects to company.com on its SSL-secured port, the company sends back its public key (and some other ...
3
votes
2answers
3k views

How can I run an EXE from a Network Share?

I have the network share \server\me mounted as H: There are executable in directories there. I try to run them in cmd.exe H:\somedir>program Access is denied. I've read that it is possibly ...
3
votes
4answers
1k views

How to properly secure a wireless home network

I'm soon going to be setting up a wireless network for me and some buddies and (hopefully) making it secure. I have some questions and concerns regarding this and figured someone here could give me a ...
2
votes
1answer
3k views

BitLocker vs. Encrypting File System (EFS) on Windows 7

So BitLocker encrypts the entire hard drive, while EFS encrypts individual files. Is there any difference in the way that they implement the encryption? Do they both use your user account password as ...
2
votes
2answers
2k views

Unexpected Access Denied error while accessing EFS encrypted file

I am getting Access Denied error when I try to access some files. ACL is OK, all ACE's all intherited, I have full access to these files and I am the owner of these files. ACE's are exactly same as ...
2
votes
10answers
7k views

Make some content on USB drive read only

I am having a 8GB pen drive, I need to put a PowerPoint into that and make it read only. Rest of the space should be usable for the user. Assuming the user will be using Windows only, what are my ...
2
votes
3answers
3k views

Does compression on a TrueCrypt drive compromise the security?

I choose “Compress drive to save disc space” under drive properties.
2
votes
1answer
1k views

Very Slow DSL (ethernet) speed [New Interesting Update]

Very Interesting and Important Update: Due to some reason I just thought to do a complete new setup and this time I decided to again have openSUSE plus Ubuntu. So I first reinstall Lubuntu and then I ...
2
votes
1answer
377 views

Is content routed through Tor encrypted?

Are usernames and passwords that I type in while using Tor encrypted from the nodes? For example, I want to use facebook, but I'm not sure if my login information is protected while I use Tor.
2
votes
1answer
4k views

Can TrueCrypt be configured to dismount volumes when you hibernate?

TrueCrypt can be configured to dismount volumes upon logoff but is it possible to dismount volumes when you hibernate windows?
2
votes
4answers
407 views

How to secure your home WiFi connection

Like many others I have a WiFi router which all my devices (XBOX, Smartphones, Laptop etc.) use to access the internet. Now I am looking at securing my connection to prevent any unauthorized access. ...
2
votes
1answer
899 views

Is it safe to use the miredo-client?

This is how I can surf websites behind IPv6 networks under Fedora 14 before: ping6 ipv6.google.com connect: Network is unreachable solution: with root just: yum install -y miredo-client sed -i "s/...
2
votes
1answer
3k views

Creating limited user account on Windows 7

I'm sharing my PC (Win 7 x64 Home Premium) with a friend, and I wanna create a guest user for her. I don't want her to reach my files, Windows settings, program adjustments etc. She should just surf ...
2
votes
1answer
852 views

Secure alternatives to VPN?

I need a way to access my home network (well, specifically just one server on the network) from anywhere. Usually I would use Himachi (free VPN client, made things very easy) but it has since become ...
2
votes
2answers
1k views

Safety precautions to take while shifting your computer

What are the different safety precautions to be taken when shifting your assembled or disassembled computer. Do I need safety precautions if the computer is to be shifted over a small distance ?
2
votes
1answer
2k views

If someone steals my chromebook while it's off, will him be able to see my cached data?

Does Chrome OS encrypts everything under my account? Does it save unencrypted data to the disk?
2
votes
2answers
138 views

How easy is it to recover a password stored in an application?

For the sake of easy use, I let the application to store my passwords. Several important passwords related to my hosting accounts are stored in Opera, Putty and Filezilla. I guess this might be an ...
2
votes
1answer
6k views

Alert when someone connects to my PC

I'm sharing various folders on my Windows 7 PC. When I go to the Computer Management section, I can see if there are any open sessions in my shared folder. When I connect to the PC from another ...
2
votes
1answer
8k views

How to deny delete/modify permission to a file?

I want to deny myself the ability to modify or delete an executable. When .NET Reflector asks you if you want to update: and you choose No it spontaneously deletes itself as retribution:...
1
vote
3answers
2k views

Secure email sending with Thunderbird?

In the Thunderbird 3 SMTP configuration dialog, there's a security section: If I want to send email without naughty hackers intercepting it, what should I choose? The "Connection security" options ...