Network Security - securing network infrastructure and connections

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Basic question about why it's useful to have VPN encrypt traffic

There may be a basic flaw in my understanding of how the internet works so sorry if this is a simple question. What type of attack does VPN protect against? For example if a local area network (let's ...
2
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3answers
38 views

Find the destination script of an inbound TCP connection on our shared webserver

We have a shared webserver which is being monitored constantly by our ZABBIX agent. On some hours of day we have unusual TCP traffic on port 80. Lets say we have over 400 connections from IP address ...
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0answers
16 views

Limit VirtualBox guests to one network interface [migrated]

I have one Linux (Ubuntu) box and inside two Virtualbox guests (guest1 + guest2). The host has two interfaces. (eth0 + eth1) I need to define: Host uses only eth0 Guest1 uses eth1 Guest2 uses eth0 ...
3
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4answers
189 views

How much of a risk to students is an open WiFi network on campus? EDIT: please read in full.

I've been battling bureaucracy at my community college for months on this issue; a few months ago, they changed security on the SSID for students; It used to use EAP, allowing students to enter their ...
9
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3answers
2k views

Is it possible that authorities can't block a certain website

I was watching a very recent TV show, the FBI agent told the police that there is no way for anybody to block a live stream of a pedophile torturing a kid nor to trace it. Even when it's being ...
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1answer
51 views

iptables intercept received packet with proxy and then forward to destination

Lets say I receive internet through my eth1 port and share it via hotspot to other devices (wlan0 port) [internet]----(eth1)[my computer](wlan0 hotspot) | ...
5
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3answers
790 views

What are the risks of making ether-wake available to all users?

The Linux ether-wake utility, which creates a magic packet to wake on lan another machine, requires root access: $ether-wake 12:34:56:78:9A:BC ether-wake: This program must be run as root. To give ...
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2answers
126 views

How to be sure that downloaded file is correct? [duplicate]

Last week I read a lot about security. I have a basic understanding how public keys or private keys works. But I still have a lot of questions I can't find an answer. Right now I'm interested in ...
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0answers
47 views

Spoof DNS in a Rogue AP [migrated]

I am using 2 interfaces on my computer, eth0 grants access to the outside world and wlan0 is where the Access Point is set up. My configuration is based on 2 networks 192.168.1.0 on eth0 and 10.0.0.0 ...
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2answers
60 views

How Secure are Virtual Networks [duplicate]

When using a Virtual Network, is it possible to infect the underlying Network infrastructure with malware from the Virtual Network. How safe is the use of Virtual Networks?
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0answers
93 views

What is my router listening for on ports 5555 and 3333? [closed]

I recently discovered nmap and pointed it at my router out of curiosity. It found that ports 3333 and 5555 are open but doesn't recognise either service. I investigated and found: I can successfully ...
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3answers
56 views

What security implications are there when sending video feed over unknown applications, and how can we protect ourselves?

This might sound broad -- but it has to be considering the details are truly unknown. Context: Our university (and many more) have begun rolling out mandatory webcam recording for certain portions of ...
2
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1answer
60 views

Local AP - Outside Router MitM Attack?

Let's say that we have our computer inside the local network. Our local network is connected to the Internet by AP+Router that connects to the router in other network which is connected to the ISP. ...
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0answers
10 views

I want to implement EAP TLS based authentication in my Java project how can I implement ? is there any API available in Java for using that protocol? [migrated]

I want to implement EAP TLS based authentication in my Java project how can I implement ? is there any API available in Java for using that protocol ?It will be great help for any reference .
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0answers
30 views

How to sniff [possibly encrypted] TDS protocol data from the host the client application is installed on?

Let's say, there is an .NET application on a windows 7 host where I have administrator's access rights. The application works with remote MS-SQL server which I don't control, it also seems that the ...
1
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1answer
90 views

Sticky keys on RDP

A recent report on page 18 states that: [black hats] have even leveraged [systems administration tools] as a means of maintaining additional persistence via setting “sticky keys” for RDP sessions. ...
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3answers
149 views

What is same site scripting and what are some exploit scenarios?

I know it is an issue with how DNS is configured , but is it really dangerous if the attacker couldn't access your network?
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1answer
138 views

Browser gives access to root directory through “/” [closed]

If I put a '/' on my browser I have full access of my root directory. I have tried the same thing on another computer and it didn't work. So, I'm trying not to be paranoid but this is too strange. I ...
10
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1answer
967 views

Is it even possible to hack a television channel?

In spite of all the hacking news in the recent few years I never heard of someone who managed to hack a TV channel. What makes them so secure?
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2answers
45 views

Shared Database and PCI Compliance

Say we have a cloud based web application which is SaaS. This application is to be made PCI compliant as a service provider, as client card data passes through the application. This application uses a ...
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4answers
67 views

Does access to a BISmark router mean access my network?

Project BISmark aims to measure broadband service by recording and reporting on service using OpenWRT-based router firmware (software licensing unclear, no LICENSE or COPYING files in the repos) with ...
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4answers
248 views

Anonymity through Tor over VPN [closed]

I want to do some research on network anonymity. Assume that I am careful enough not to disclose any personal information while connected to an anonymous network. If I run a system that uses TOR ...
3
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1answer
129 views

If I connect to VPN through proxy, who can see what?

I try to understand what happens when I use an HTTP(S) proxy in my OpenVPN client configuration. What's the advantage of an HTTPS proxy over plain HTTP? In any case the encryption takes place on the ...
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1answer
62 views

Communication between two open endpoints, is this secure enough?

I'm building a (very simple) tool to communicate between two servers. I started by asking if there was a better alternative than making a home made scripts and we came to the conclusion that for ...
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2answers
79 views

Facebook security

I check my security settings (from my Facebook acc.) from time to time, and sometimes I see there are IP addresses which logged into my account but don't belong to me. When I look in the web who is ...
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2answers
126 views

Is it dangerous to use hamachi

In the Minecraft community people are firing up hamachi with Minecraft servers, but over all is a public hamachi dangerous for the host and all the users using it?
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2answers
154 views

Fake phone call

I have a problem, getting call from known numbers and when he lifts it, no one is speaking from other side! Well, the awkward part is, the call is from known numbers only, but if I ask the person ...
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2answers
108 views

Nmap scan list of domains and provide boolean if up/down

I have a newline separated list of domains that I would like to perform an arbitrary nmap scan on (e.g. aggressive, syn) and I would like to output a boolean that indicates whether or not any ports ...
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2answers
103 views

Advice - When just starting your career, what are the best certifications to eyeball? [closed]

Im just starting out in school to study Network and Info Security. I know this is the field I want to invest my time and study into. Well over 200k security jobs went unfulfilled last year. My ...
0
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1answer
164 views

My computer hacked? tcpdump show a connection to an ALLOCATED UNSPECIFIED ip address

13:06:05.345111 IP 192.168.1.101.36218 > 157.55.130.174.40033: Flags [.], ack 162, win 237, options [nop,nop,TS val 688796 ecr 596714815], length 0 This IP address is Allocated Unspecified on ...
3
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0answers
83 views

Is it possible to retrieve SSH v2 credentials in a username/password authentication scheme?

I'm currently analysing a compromised network(root access has been gained to a workstation and logs show that it has been used for port scanning and service brute forcing attacks on the remaining ...
0
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1answer
45 views

How to test for zone transfer? [duplicate]

I heard that it is possible to test for zone transfer attacks on a web application using host and dig commands in Linux. How it is done?
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1answer
76 views

Shellshock vulnerability for pc inside LAN

A common pc running bash inside a home LAN network (with a router/gateway providing internet access to the LAN) does not have any contact with the external internet, except browser navigation and the ...
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3answers
237 views

Understanding the security of my home network

With so many devices that have internet connectivity, I really want to put something in place that can alert me if any application or device is communicating insecurely. How would I use something like ...
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1answer
45 views

How strong exactly is a 3gbps booter?

I heard some people talking about how they had a 3 gigabyte per second drddosser. That sounds all fine and dandy, but what can that actually do? Could it take down a website? To what extent?
2
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1answer
112 views

How secure is WiFi roaming if clients connect automatically to access points with the same SSID and security?

After reading a bit about WiFi roaming where multiple access points are set up with the same SSID and WPA/WPA2 shared key, I'm wondering how secure the concept of WiFi roaming is. If clients connect ...
1
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1answer
80 views

How can we represent SSL and Firewall in OSI Model? [closed]

I want to draw an architecture diagram for a general ERP application. In that I have come across a confusing point: where should I place the SSL and Firewall? I tried to figure out exactly where ...
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0answers
57 views

How to retrieve type of device starting from its public ip

Given a public ip, is there a way to retrieve what's lying behind? I mean if I use nmap -PO 159.149.xx.xxx I am able to know if the device is alive (responding to ping) and which ports are open. But ...
2
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2answers
141 views

Computer's IP address used by another in closed network?

I got an alert in the newest OSX (newest Macbook Air) and in Eduroam network that my IP address is used by another machine. This is my first time in life. I think I may have been attacked because I ...
1
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1answer
60 views

How can I implement a whitelist based on packet content?

At the moment I am looking for some way on Linux to have packet filter whitelisting done but based on fine-grained parameters such as packet content rather than more general parameters such as ...
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0answers
27 views

Using Team Foundation Server for Classified Projects

I work in a secure area on programs in which large portions of the code are federal government classified secret. We use Visual Studio so I would like to be able to use TFS for versioning control ...
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0answers
53 views

Tunneling Remote Desktop from DMZ Windows server to my Listening Linux Server. How to?

I have a situation in a penetration test where I got a meterpreter on an internal (DMZ) Windows box, and I want to connect via RDP to it, however the RDP port is blocked externally. The box I hacked ...
32
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4answers
5k views

Why does malware periodically check google.com

I'm looking at some malware PCAPs, e.g. http://malware-traffic-analysis.net/2014/05/27/index.html . One of the things I've been seeing frequently is requests to alexa top million sites (e.g. yandex, ...
4
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4answers
621 views

Server situated on two physical networks - Bad idea or not

The run down: Windows Server A (from here on referred to as 'the server') exists on the corporate network (ref as Corporate). A separate physical network exists for the Telecommunications Department ...
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1answer
50 views

What are lawful network interception tools? [closed]

I am looking for network interception tools, which involves sniffing external networks... this is regards to a forensic project.. Any help would be appreciated!
1
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1answer
99 views

Worst-case scenario OPEN URL REDIRECTION and why google not covering it in bug bounty

OPEN URL REDIRECTION as per in my opinion can be proved very dangerous by crafting attacks such as phishing. But it seems like google thinks it as a very low level bug and does not provide any ...
2
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0answers
35 views

Removing malware which is creating temp file and modifying network traffic [duplicate]

I am on OSX 10.9.2, please note I have included several URLs in my post, this is not spam this is due to the nature of the malware. I have just discovered I have malware on my computer after noticing ...
2
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1answer
54 views

Should reverse connections be used to bypass NATs?

I'm planning on doing a demonstration on how remote administrative tools work for my schools computer security club. I plan on writing a RAT in C++ and demonstrating/explaining how it works. I ran ...
3
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1answer
256 views

Closely spaced failed logins in auth.log

I have a raspberry-pi (running GNU/Linux) and I recently allowed my router to forward port 22 (ssh) to the raspberry-pi so that I could log in while away from home. I then noticed a bunch of ...
0
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1answer
357 views

Download Torrents on University network without detection [closed]

I am wanting to download some things using Bittorrent, but I have heard that they can detect when someone is downloading torrents. How can they detect this? And are there any precautions I can do to ...