Network Security - securing network infrastructure and connections

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37
votes
9answers
18k views

Are powerline ethernet adapters inherently secure?

I have 2 Zyxel PLA407 powerline adapters. Router is downstairs connected to one adapter, other adapter is upstairs about 30 feet away connected to a desktop. I have a house, not an apartment or ...
1
vote
2answers
504 views

When do I use IPsec tunnel mode or transport mode?

I basically understand how tunnel mode and transport mode works, but I don't know when I should use one instead of another. Among the two parties who want to communicate, if one computer B doesn't ...
4
votes
2answers
159 views

Is HTTPS redirecting to HTTP a vulnerability?

Let's say a user is authenticated, and the entire account authentication process happened under secure HTTPS. Upon successful login, the user is redirected back to the homepage. However, the homepage ...
2
votes
1answer
92 views

Does having a VPN service mean accessing my email etc. over public free open WiFi mean I have security/privacy? [duplicate]

Is my information secure over public WiFi if I use a VPN service? i.e. protection of emails and login details.
8
votes
5answers
1k views

What Man-made Physical Threat Could Pose Severe Danger to a Server Farm?

I am writing a novel in which a researcher attempts to work against a study he is a part of by purposely sabotaging operations on the research compound. I am wondering if the following is plausible. ...
37
votes
4answers
5k views

Can a neighbour who installed my router access it?

I have a bit of a security concern. I'm concerned that my neighbor sees everything on my computer, web sites I have visited, my passwords, etc. Background: He installed a Linksys router in my house ...
-2
votes
3answers
1k views

How to hide my ip and browsing history from others on my network?

I need to hide my activity and IP address from those I share this network with. I'm unsure if a VPN will serve my needs, because I'm not concerned about the sites I access tracking me. I'm concerned ...
1
vote
4answers
203 views

Strange device in routers client list

Due to a high number of clients connected to one of my routers I recently changed it's password and reboot it. I also disabled WPS. The router is a ZyXEL Prestige 660. After the reboot the client ...
0
votes
1answer
494 views

JUNIPER Junos Pulse - how to apply policy to device

We'd like to set up and use Juniper Junos Pulse on iphone and ipad for access to Corporate mail. We have juniper SA and have prepared the policy, but how do we apply the policy to the devices?
8
votes
3answers
160 views

What are the risks to a network if a single computer is compromised?

If I open up a dedicated server on my home network to accept incoming connections (HTTP, SSH, etc) and that machine is compromised by an outside attacker, what are the risks to other devices on the ...
9
votes
2answers
10k views

Is it possible to use the aircrack-ng tool to crack a WPA2 Enterprise network?

is this tool (aircrack-ng) capable of cracking into a WPA/WPA2 Enterprise network? This tool has major success cracking the passwords of WEP/WPA networks. If it can, how, but if not, is there another ...
2
votes
2answers
219 views

What are the advantages to using a VPN over secured/trusted wifi

It's often recommended that you should use a VPN when using unsecured or untrusted networks, such as open public wifi or secured wifi that you don't control. What are the advantages to using a VPN on ...
2
votes
1answer
81 views

Redeploying multiple Secure sites on a single server

This may not be a great site for this question. I basically have approximately 10 VPS instances running a secured website each, each with their own SSH connection to a hosted Database. What I'm ...
2
votes
3answers
963 views

How to know what others browse through the network?

My friend connected to WIFI and after 5 minutes he told me which sites I had actually been browsing, and who I chat with. My question is: how do I defend myself against this, and also how did he do ...
1
vote
1answer
546 views

Is there a way to block all TOR traffic incident on my public servers?

I don't want any connections coming from a tor network to be accepted by my servers.
0
votes
1answer
32 views

Unsecured Guest access on Macbook Pro

I am concerned that my personal, home based Macbook Pro guest network access may be being used by an outside source. Is there a way for me to identify user access, time logged in / out, etc?
0
votes
1answer
101 views

What's a least-privilege way to allow node.js to access network adapters on Linux?

Linux naturally restricts all but superuser from pulling traffic directly from network adapters. In the case of Wireshark/dumpcap, setuid root is used ONLY for dumpcap, restricting the privileges ...
1
vote
1answer
420 views

Attacking a server on port 80 while only port 22 is open on the firewall

There is a question bugging me a after reading on network security. Theoretical situation: there is a packet-filtering firewall, which only accepts tcp/ip communication with destination port 22 on a ...
0
votes
2answers
805 views

connecting a secure computer directly to the internet without a router

If you have a fairly secure computer how dangerous is it to connect to a modem directly without a router in between. Let's say the computer is running Debian as a host and Whonix in VirtualBox, a VPN ...
1
vote
1answer
98 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 ...
1
vote
3answers
735 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?
0
votes
4answers
171 views

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 ...
3
votes
4answers
264 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 ...
0
votes
1answer
930 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?
3
votes
1answer
361 views

Security of Openflow/SDN network

Openflow/SDN networks give a remote controller the ability to manage the behavior of network devices i.e. configurations. They can forward instruction sets to dynamically change network configuration. ...
9
votes
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 ...
0
votes
1answer
214 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) | ...
3
votes
4answers
4k views

Should I enable domain authentication in my DMZ

Traditionally at my place of work we have an internal subnet that is completely protected behind our firewall. No ports are allowed to be opened to direct connections from the public network. We also ...
7
votes
4answers
6k views

Is the US military secret network SIPRNet physically or cryptographicaly separated/secured?

I've read the Wikipedia articles on SIPRNet and NIPRNet (which are pretty light on details) and they are supposed to be considered separate. At the network level, are they technologically ...
2
votes
1answer
2k views

How to secure my network, laptop, ipad and email accounts which are possibly hacked?

Background Last month I noticed lots of failed emails in my inbox and after few minutes I lost my access to my Yahoo Mail. My friends informed me that they have received spam emails from me. So I ...
5
votes
3answers
988 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 ...
0
votes
2answers
156 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 ...
27
votes
2answers
3k views

Do simple Linux servers really need a non-root user for security reasons?

Playing devil's advocate, Let's assume I purchase a Linux server from a hosting provider. I am given a password for the root user and am told I may login using SSH. The only purpose this server has ...
1
vote
2answers
87 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?
3
votes
1answer
303 views

Can I perform WEP cracking from several laptops against 1 AP

I have successfully being able to perform WEP key cracking attack using aircrack tool. I want to allow my students to test this in a lab environment. They will be working fro their own laptops against ...
1
vote
0answers
580 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 ...
2
votes
1answer
243 views

DNS packets during ARP poisoning

I carried out an arp poisoning attack from my virtual machine to real machine with cain and able and collected data with wireshark from real machine. While I was investigating data with wireshark I ...
2
votes
1answer
141 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. ...
1
vote
1answer
180 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 ...
2
votes
2answers
250 views

Indirectly relaying intranet server to outside world

I have an internal network of IP network cameras. The feeds from these cameras are ingested by a single server and presented from a unified web interface both internally and to the outside world (both ...
1
vote
2answers
90 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 ...
0
votes
4answers
85 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 ...
0
votes
4answers
548 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 ...
1
vote
2answers
148 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 ...
1
vote
1answer
72 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 ...
3
votes
1answer
600 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 ...
0
votes
2answers
991 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?
1
vote
2answers
106 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 ...
0
votes
2answers
230 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 ...
30
votes
9answers
67k views

How secure is TeamViewer for simple remote support?

I'm deploying a web-based ERP system for a customer, such that both the server and the client machines will be inside the customer's intranet. I was advised in another question not to use TeamViewer ...