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

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If a port behind NAT sends a packet to a malicious host, can that host send packets to any open port, or only the port that sent the packet?

For example, a computer behind a NAT router uses Skype. Skype uses port 4000 to send packets to a server to establish indirect connections with other Skype clients. Since Skype had sent a packet to ...
0
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0answers
13 views

Unwanted Program Files [duplicate]

I have two different files that I have repeatedly tried to delete but it keeps telling me that I don't have the right to delete them from my own computer. The files are Between Lines and TV Wizzard. ...
1
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2answers
138 views

How do you unprotect the VBA macros for a macro-enabled workbook if you forgot the password?

I have heard myths about how easy it is to crack a VBA macro password, but haven't been able to figure out how to do it myself. We have an excel file at work where the VBA is password protected and ...
1
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1answer
25 views

What are the risks of creating a gnupg private key with no passphrase?

On a multi-user system (linux), I created a private key with no passphrase. I can now encrypt a file and decrypt it locally without supplyng a passphrase. This is very convenient and appears to be ...
0
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0answers
38 views

iptables TCP flags

I'm beginner with iptables and networking so please excuse me for such dump questions. I found in Internet part of filtering malformed packets: /usr/bin/sudo /sbin/iptables -A tcpchk -p tcp ...
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0answers
15 views

Response and prevention to malicious script incurring excessive usage on AWS S3/CloudFront

How does one respond to malicious script, that is continuously accessing the objects in S3/CloudFront on AWS? For example if I have a web page and using S3/CloudFront to deliver static files, the GET ...
0
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1answer
47 views

How do I catch a packet sniffer in local area network? [closed]

Actually I am a college student and in our hostel someone is regularly attempting attacks like ARP poisoning which leads to great loss of bandwidth.Please briefly explain the techniques which you ...
0
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1answer
181 views

Compromised DigitalOcean Droplet, doing DDoS attack, what is correct process to investigate cause? [closed]

I was informed by DigitalOcean today that my Droplet on there has been disconnected because it was doing a DDoS attack. They've asked me to investigate and find out what was causing it. This was ...
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0answers
17 views

Prevent computer from connecting to outside LAN networks

I'm looking for a solution like Restrict Computer from Connecting to Outside Wireless Networks that would also work with wired connections. We have a consultant in our company that sometimes works ...
0
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0answers
35 views

do i need security center enabled with mcafee livesafe?

Will windows firewall/defender conflict with my antivirus firewall/spyware and slow my shitty comp. I have disabled security center and it runs better but am I vulnerable?
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1answer
44 views

Bitlocker activated on win 8 with USB Key, want to switch to pin

I'm having trouble figuring out how to switch from USB key to pin unlock for my bitlocker protection on my tablet for work. Anybody have any ideas?
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0answers
11 views

KVM accessibility from host machine

We have a KVM Host machine running multiple VMs. I am now tasked to create an instance with very sensitive data. Setting firewall and other OS specific settings is not the problem. Question is: can, ...
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0answers
16 views

Do .AppleDouble files on web server pose a security threat?

I already had the AFP server set up my Ubuntu Server machine when I decided to also use it as an Apache web server. I got it set up, then started editing sites over AFP from my Mac. It's been up for a ...
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1answer
45 views

Linux Security (plugging gaping holes in old systems) [closed]

I have recently started a new position in a relatively small company and taken lead position on the Linux/UNIX side of things (and windows server/AD etc, but that is beside the point) in our company ...
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1answer
81 views

How to encrypt Google Drive on local machine

I'm a Google Apps customer and one of the things I'm using is the Google drive service to sync my files from my work PC to my home. This works fantastic but I have a concern about theft of the machine ...
0
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1answer
53 views

How to get browsing history for PC in same network [closed]

I have made a ticket booking recently without creating an account from my office network. After few days, I receive an email saying that my ticket has been cancelled. When I contacted the flight, they ...
1
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1answer
40 views

Not able to stream video from my Defender SN500-4CH security system [closed]

I have a Defender SN500-4CH v1.0 security system. For some reason I am not able to see the broadcast on it when I connect it to the world. It would ask me to login, so I put the correct user name and ...
0
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1answer
35 views

Accounts hijacked after open wifi network. What now?

So I have been informed that I am sending spam email from my gmail account. I'm currently abroad and I have connected to several insecure connections. What should I do now to restore security to my ...
0
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1answer
31 views

What ports do I need to open for offshore to access our SQL Server db?

When using SSMS, for example, for connect to a SQL Server, I would specify the server name to which a wanted to connect as well as the Authentication method, in this case, Windows Authentication. If ...
2
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1answer
56 views

Network Security - Potential issue [closed]

I have to send a program over to China which accesses a server inside our network. This program updates SQL records and stores large amounts of data on the status of products beings tested, on this ...
4
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1answer
540 views

Weird test.txt files always popping up in dev folders

In literally thousands of folders and subfolders, I have files called "test.txt", which are always exactly 48 bytes, looking like this: 2 NUL 8 T 2 DLE 0 B 2 NUL 8 H 2 NUL 0 P Or in hex: ...
1
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1answer
67 views

Send packet (frame) with different 'Sender's MAC'?

I was just studying the Network+ book where it explains the contents of a Frame using blocks to represent a set of bits. Moving onward, it states that the first 'block' is the Recipient's MAC address. ...
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0answers
244 views

What is a TLS Lenovo Home automation controller?

I went to install a printer on my laptop and spotted the following: I have an HP laptop and am in the office and don't have anything Lenovo related hooked up to my machine, so what could this be?
1
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1answer
185 views

Filezilla can't connect with TLS on one domain name

I've two websites: one hosting by OVH, and I have no problems with connection with Filezilla (I can use FTP connexion with TLS) one another not hosting by OVH, and when I'm trying to connect with ...
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votes
2answers
67 views

Is my router secure from remote hackers if it uses NAT and has its built-in firewall enabled? [closed]

My router uses NAT, so it blocks unsolicited packets if I did not send a packet to the source of unsolicited packet first or my port is not forwarded. I understand that this is not meant to be a ...
0
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1answer
52 views

How to make Windows 7 ask for admin permission for all actions?

For example, Linux will ask permission for each and every action; e.g., for installing software and uninstalling software. Is it possible to configure Windows like that?
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2answers
415 views

In light of the discovered vulnerabilities in SSL/TLS, is legacy RDP encryption or SSL more secure? [duplicate]

Windows offers the option of using either RDP encryption or SSL (TLS 1.0) to secure a remote desktop connection. Which option is more secure? Given the recent discoveries, is TLS 1.0 still secure in ...
0
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2answers
68 views

How to make sure that repositories added to Linux Mint are safe and secure [closed]

I’m using the latest version of Linux mint which based on Ubuntu, I have installed many programs by adding a new repository to the list of checked repositories. Now I’m worried of how safe these ...
0
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2answers
27 views

Users and permissions on a Raspi which is both a home and an owncloud server

I'm a long time Linux desktop user but a total newbie in servers and security. Now I want to set up a Raspi (running Raspbian) to act as a CUPS print server, an NFS file server and backup storage, an ...
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0answers
46 views

How can I tell if my NAT Gateway is a Full-Cone NAT (one-to-one) or a Restricted-Cone NAT?

Since a Restricted-Cone NAT blocks incoming packets from sources which I did not sent a packet to first, I feel as if it is more secure, unlike a Full-Cone NAT. However, I am not sure what my NAT ...
2
votes
1answer
50 views

How to delete Wi-Fi password on shutdown?

I use a wireless network on my Windows 7 and 8. The problem is that I don't want to store the password I entered so I need to know if there is any method to delete saved passwords every time I ...
-1
votes
1answer
44 views

How does Chrome Remote Desktop manage the remote screen? Can this behaviour be altered?

Does Chrome Remote Desktop keep the remote screen off/locked, or will it show the active remote session? Is there any way this behaviour can be altered?
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2answers
32 views

Security level of a hard drive password

I’m about to get a new laptop. I’d like to have some basic security to prevent access to my data in case of getting lost or stolen. At some point I will replace the hard drive with a self-encrypting ...
34
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1answer
2k views

How to find source process of unknown popup in Windows 7

A random popup appears in Windows 7 titled as Information with a progress bar and a clock. The window sometimes says Please wait a moment..., and the progress bar moves very slowly and disappears. ...
0
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1answer
307 views

Server Admin has insufficient rights to add SYSTEM DSN. Why?

My Logon ID is in the Administrator Group for a server. Yet, when I run bring up the ODBC Data Source Administrator by launching it as the Administrator and navigate to the SYSTEM Data Source tab, I ...
7
votes
2answers
2k views

How long would it take to break a 1024 bit OpenPGP encrypted email?

For WPA, there are calculators to determine the time needed to crack a passphrase, but I have found nothing for OpenPGP. How long would it take to break a 1024 bit OpenPGP encrypted email (depending ...
3
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0answers
173 views

How to configure linux to enforce new users to change their password on first login

I'm trying to configure users password policy on RHEL 6.6 and I want system to ask newly created users to change initial password on first login. Note, that I tried to set EXPIRE variable to 0 and ...
22
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4answers
2k views

What functionality would I lose if I disable browser-based Java?

I am reading that disabling Java—not JavaScript—will make my computer safer form malicious software attacks. All indications are that it will indeed make it safer, but there are no real reasons out ...
2
votes
1answer
35 views

How can using a Tor Hidden service for SSH improve security?

I recently read some blogs posts about how to use Tor Hidden Services to access an SSH server. They argued it can increase security, but I don't understand why this should apply. As far as I ...
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0answers
65 views

SecurePoint is not allowing https access through OpenVPN, why not?

How can I get https access from Windows through OpenVPN to apps running on a remote CentOS 7 server? I am trying to use the SecurePoint OpenVPN client for Windows, but need some better instructions. ...
1
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1answer
67 views

Unknown Contact has full access to folder?

Is anyone able to take any educated guess(es) about what this "Unknown Contact" is, which has access to a few shared folders on my computer? The concerned machine is connected to another via a ...
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0answers
14 views

How can I save / access credentials in credential manager from a remote machine? [duplicate]

I have to save credentials using a service account onto a remote machine and also should be able to access the credentials from remote machine using the service credentials. I have tried using ...
2
votes
0answers
69 views

Configure Java 8 Exceptions list for all users on a computer?

I need to add several sites to the Java exemption site list in Java 8. The problem is that Java's security settings are done on a per user basis and not on a per system basis. This means that when I ...
0
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1answer
51 views

How to stop a DDoS attack using the CSF firewall?

I have a local CentOS server used for web hosting. There are a lot of attacks that come in from many different IP addresses that try to hack into a Joomla 2.5 based website. This causes my Apache ...
1
vote
1answer
28 views

NTFS Security Settings Authenticated Users not in list

Working on securing permissions on network shares in the office and I wanted to use "Authenticated Users" group instead of one I already had called "public fileshare users". They serve me the same ...
2
votes
0answers
83 views

“Windows Security” alert when moving files in My Documents/Desktop (local disk)

Every time I try to move a file to a different location in My Documents or on the Desktop by dragging it I get a "Windows Security" alert telling me "These files might be harmful to your computer". I ...
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0answers
27 views

Is Windows 8+ Reset the same as performing a clean install from a MSFT .iso or an OEM .iso?

Windows 8 and newer versions have a "Windows Reset" feature that reinstalls windows. The question is, does it perform the same kind of clean install that you would achieve with a MSFT .iso, or does it ...
1
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1answer
37 views

Password policy using pam_cracklib is not enforced for root in gui

I'm on Red Hat 6.6 now, trying to enforce password policy for root user. My /etc/pam.d/system-auth file contains following lines: #%PAM-1.0 # This file is auto-generated. # User changes will be ...
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0answers
27 views

bash Segfault by infinite recursion

I just noticed that the bash I'm using (4.2.25(1)) isn't protected against infinite function recursion. In such a case a Segfault happens (and the bash process terminates). To check this on your ...
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votes
1answer
39 views

Is it possible I would get hacked by using DNS service? [closed]

I heard some people say, it’s possible that some hackers can access PCs while using public DNS service because they’ll be vulnerable to them. However, paid DNS service requires credentials, so it’s ...