Network Security - securing network infrastructure and connections

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8
votes
1answer
482 views

Is it possible to recognise and prevent MitM attacks on devices which use self-signed SSL certs?

I use both Linux and Windows at work on a large enterprise LAN. The majority of the network configuration is out of my reach. Certain SaaS applications that are hosted locally on the enterprise LAN, ...
2
votes
3answers
200 views

How to manage known infected network

If you have large distributed network that is known as being infected with viruses and etc.. and you cannot format the computers becuase its large scale. What are the best ways to handle this ...
7
votes
1answer
369 views

different portscan tools give different results

I have different results as of my open TCP ports. When using nmap -sS 127.0.0.1, I get some 5 usual open ports, but when using osx built-in tool as stroke, I get those 5 ports plus 5 extra ports. How ...
0
votes
2answers
116 views

Allow or Deny Access to a Network Based on Client Hardware [duplicate]

We have to build a product that will have a network. Users will be able to connect to this network by downloading a client. However, before allowing them to access the network we want to check if ...
2
votes
1answer
2k views

How can I get the IP address for a ToR Hidden Service (HSP) with a .onion address?

I'd like to find out the IP address of a given .onion address. Is it possible for me to simply assign an exit node (that I control) to my client and just monitor it to determine what IP address ...
3
votes
1answer
5k views

House owner can see who's connected to WiFi; what more can he see?

I live in a rental house, and use the house-owner's wireless network to connect to the internet. The owner can see who is connected to his wireless network and I had a few questions regarding this ...
0
votes
2answers
2k views

What would a hacker do if he got your router password over the internet? [duplicate]

I was wondering!! I like configuring my router so that I can access it over the Internet even when am not home. What are the most critical risks if a hacker got my router password?
16
votes
2answers
993 views

Hosting an “IP Rental” address. Is this common, safe?

I have a supposed opportunity to get in with an individual with advertising and a side business of his, renting IP addresses. He has asked me to set a dedicated DSL account at my house. Is there any ...
1
vote
1answer
84 views

VM Guest network security with NAT?

Supposing I have an untrusted guest VM (e.g. I'm running a cloud data centre). If I set the network connection up to use NAT, the guest can still access the internet. But what's to stop them accessing ...
0
votes
1answer
528 views

Man-in-the-middle attack over an encrypted channel

I learned recently about man-in-the-middle attacks and came up with this question. Let's say we have two computers who try to communicate over the network. Each computer has an encryptor and a ...
2
votes
1answer
337 views

Protect an application that uses internet from packet sniffing

I developed a stand alone application such a way that, application use a remote service (using SOAP/REST) which available WWW. I am using HTTPS though out the application calls. It was perfectly ...
2
votes
3answers
8k views

Can viruses transfer from phone to computer over the network?

I don't know if this is the right place to ask but I heard that adult websites (porn) had viruses. I used to look up porn on my iPhone (I won't anymore) and I understand that there aren't viruses for ...
-3
votes
1answer
326 views

How to convert some packets in a readable format [closed]

I am looking for a tool for osx, that can convert this raw data in some readable format. Testing my wifi network, I began sniffing my packets, and ran tcpflow -i en1 -c I want to get the sniffed ...
1
vote
1answer
4k views

Totally different IP addresses assigned when using the same router

For some time I have observed a strange behaviour when connecting to the internet through my WLAN. Depending on the computer I use on my network, the ISP assigns me totally different external IP ...
2
votes
1answer
209 views

How are IaaS Virtual Machines Isolated?

I am currently examining Hypervisor firewalls for my graduate thesis, but I unfortunately don't have a lot of experience with IaaS environments. How are IaaS Virtual Machines network isolated from ...
4
votes
2answers
327 views

Can botnets be injected through open wifi to smartphones?

I have read this paper, which is answers part of the question. It answers, 'open wifi will help increase the spread speed and impact' but what I want to know is, can you 'plant' an open wifi access ...
1
vote
2answers
6k views

How can I monitor traffic of devices on my WiFi? [closed]

I have my kids cell phones attached to my router. What can I install to view what they are browsing and the media they have? I want to make sure my kids are safe
2
votes
1answer
354 views

Reassemble sniffed packets [closed]

I am attempting to analyse my WiFi network with on Mac OS X, is there a tool to reassemble TCP stream from Wireshark capture. I would like to see the entire HTML pages that are passing through the ...
2
votes
2answers
1k views

hide dhcp/ip request, traffic under lan router

I have a question on the following scenario: Lets say, we have a normal LAN network with 192.168.1.1/24 gateway, DNS, DHCP servers all running on 192.168.1.1 ; There is only one client: ...
-3
votes
2answers
741 views

What is the better way to share files between a server in DMZ and a server in the internal network? [closed]

I have to implement a solution to share some xml files between a frontend server in a DMZ and his backend in an internal network. Both servers are Solaris 10 boxes. What is the better way regarding ...
1
vote
2answers
265 views

Bridge Exploit of Network Multi-function Print/Fax Devices

I performed a recent security audit and was wondering if anyone has heard or run across any known exploits against any commercial multi-function print/scan device whereby you can bridge the incoming ...
-2
votes
4answers
6k views

If a hacker is on the same Wifi Network as I am, what can he do? [duplicate]

Ok so when a hacker has the wifi network's password and gets on the network, he can do things like monitor traffic, catch passwords, even access PCs, etc. But what I'm interested of knowing is what ...
-6
votes
1answer
968 views

Hack a LAN with low security [closed]

In our university users have to use VPN to connect to internet.But for local works(like login to university website,checking their university accounts) VPN is not needed.And as I know we have ...
4
votes
4answers
1k views

Block unauthorized user from getting access to intranet

What's the common way to block users from accessing intranet? Right now, whoever plugs in a cable can access any intranet server freely. I want to change this behavior. But given that we run not only ...
4
votes
2answers
889 views

Security test lab setup [closed]

I want to setup a testing lab in my basement for penetration/vulnerability testing & offensive/defensive security skills. I believe I have all the equipment that I need, and if I'll need something ...
0
votes
1answer
464 views

Securing my firewall (both dedicated and iptables-based) [closed]

I have an ASA-5510, but I also intend to maintain strict IP tables on my server (Ubuntu 12.04.2), so that there are two layers of "protection". My iptables look like this: *filter # Allows all ...
-8
votes
1answer
4k views

How are IP addresses traced? [closed]

Let say I have done something harmful to some computer. I am on wifi at my hostel, so for that session I have some IP assigned. Now, since tomorrow I will connect again to wifi and get a new IP ...
5
votes
1answer
145 views

User Account Control and outside processes

I was using TeamViewer (a remote desktop client) to log in to a remote computer running Windows 7. While logged in, the Java updater prompted me for administrator access to run an update check. Out ...
10
votes
4answers
7k views

Why is WPA Enterprise more secure than WPA2?

In personal mode WPA2 is more secure than WPA. However, I have read that WPA Enterprise provides stronger security than WPA2 and I am unsure exactly how this is achieved.
3
votes
2answers
314 views

any reason not to run tmux/wemux on a bastion host?

Is there any reason to worry about running tmux/wemux on a bastion host? It seems to me that it would open up vectors to have your terminal sessions hijacked by some locally exploited account on the ...
1
vote
1answer
78 views

Securing Downloadable Files on Website Per User

I have an ASP.NET website serving up private PDF documents. The PDFs are stored unencrypted on a share on the internal network. The user logs in and navigates to the download page. The web server ...
2
votes
2answers
2k views

What's the difference between an application-level and circuit-level gateway?

From Wikipedia, I understand that circuit level gateways look at TCP handshakes to filter illegitimate traffic and that application level gateways somehow filter application specific traffic. But I ...
2
votes
1answer
108 views

Eavesdropping a communication between a local application and the network

After some digging on the Internet, I've been unable to find a satisfying solution for my curiosity... Here's the thing : using a shell script, I've been able to obtain a list of IP addresses ...
1
vote
1answer
107 views

IPSec, hubs, crypto maps

I thought hubs were layer 1 devices, and so would have no active role in IPSec. I am reading to understand crypto maps, Dynamic crypto map policies are used in site-to-site VPNs when an unknown ...
3
votes
3answers
3k views

Securing a network attached storage on the internet

I recently purchased a network attached storage for personal file storage and would like my family members to store files on the device from their computers as a remote backup. I'd like to secure ...
10
votes
6answers
1k views

Alternative to VPN

We have a network that is completely closed to the outside world. It needs to be. Problem is we need to remote into a server on this network once in a blue moon for diagnostics. We've discussed ways ...
2
votes
1answer
3k views

Snort/IDS detect and alert on possible DoS/DDoS attack?

As per the title, I'm attempting to configure Snort to detect and alert on a incoming Denial of Service attack. Looking at the rulesets, which are primarily signature based rules, I can't see a ...
4
votes
4answers
864 views

How to make sandbox-only internet access?

How can I set up my Windows PC and/or network, so that none of the programs on my actual PC have internet access, but i have a sandbox/VM, with a browser, which has internet access, but has no access ...
1
vote
2answers
1k views

Open DNS Dynamic and Static IP

I want to block adult sites not torrents and other. Currently i am using "OpenDNS Home free". i set those free DNS 208.67.222.222 and 208.67.220.220 in router DNS fields and also i have "OpenDNS ...
3
votes
5answers
332 views

Blocking network access to host(s) at the kernel level in Linux?

Getting it out of the way: Not iptables! What I'd like to do is block network access to certain IPs, subnets, and/or hostnames at the Linux kernel level, such that no user, including root, could ...
1
vote
2answers
336 views

Is IP Forwarding a risk by itself?

A coworker claims that merely enabling IP_forwarding on a single homed Linux machine poses a security risk as he says it could then be used as a proxy. I can't think of how this would work, except ...
2
votes
4answers
2k views

How to remote monitor a computer network traffic?

I would like to know if it is possible to remote monitor the incoming and outcoming network traffic of a specific IP from my network. I need to log the time, ip numbers and port that contact the ...
2
votes
0answers
91 views

Is the GTK or MIC in the unencrypted portion of a WPA protected frame?

In order to decrypt traffic you must have all 4 portions of the WPA Handshake. In WPA protected data frames, is there an unencrypted portion of that frame that has some sort of identifiable value to ...
3
votes
5answers
1k views

How can I find the source of traffic allegedly originating from my IP address?

I have a problem that has been going on for at least 6 weeks. I have Time Warner for my Internet provider and some websites hosted at GoDaddy. From what GoDaddy tells me the reason I can not view ...
0
votes
1answer
69 views

How to specify a Snort rule connection duration?

Is it even possible to specify into a snort rule the duration of a connection? For example: in this format Hour, Minute, Second H, M, S = 0, 2, 1 If a connection that has the duration of 2 minutes ...
2
votes
1answer
518 views

How to add wildcards to snort rule ip address?

Is it possible to add wildcards or something that would function like them to a snort rule IP address? For example: If I'd like to detect source-ip of: 192.168.*.9 Where the third octet can be ...
2
votes
1answer
736 views

IPSec AH + ESP used together

When ESP and AH are used together (ESP transport, AH transport) on the same packet does ESP encrypt the AH's hash, or is the hash left in the clear? If the hash isn't encrypted, there are obviously ...
-1
votes
3answers
404 views

How to Block a url not a website [closed]

I want to block a single url. I am using OpenDNS now and it is working fine with website blocking on my network but the problem is that i want to block a url like ...
5
votes
3answers
388 views

Organization like OWASP for network security?

Is there something like OWASP for Network Security ? Or have anyone of you come across a testing guide for network security, as to how to start an audit and then the minimum number of tests to run ...
7
votes
1answer
195 views

Using / finding covert channels in inter-process communication

I've got a class exercise that involves a virtual game of Werewolves/Mafia. We're not really taught how to do anything in this class, which makes it hard for everyone to do the labs. The idea is that ...