Network Security - securing network infrastructure and connections

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Limiting account access based upon NIC used to connect on Linux

I have a server which has multiple NICs (ignoring redundant pairs): 'inward' facing production (connects to other servers); 'outward' external facing production (connects out to the internet via a ...
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3answers
89 views

Blocking access to social media on Windows

I would like to block websites like Facebook, YouTube and other social sites as part of my job and would need your advice on how to manage that. There are about 120 PCs in the building. Is something ...
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i am using college lan. What can i do to ensure maximum lan security? [on hold]

What softwares should i use? What are the best 5 methods to implement lan network security?
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1answer
120 views

De-auth attack Reason codes and possible reaction

I am learning about Deauth attacks and how they work. I see that the Deauth frame has a reason code which indicates the reason for the deauth. I have tested the attack with aircrack-ng and this reason ...
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2answers
1k views

IIS IP Address Restriction - can I rely on it online?

I've been told that I might have more luck posting here than on Stack Exchange, so here goes: I'm looking for a way to lock down a 3rd party application in IIS. It's a web service, so there's no ...
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2answers
358 views

How can you (anybody) find out the IP address of a single computer inside college

How can you find out the IP address of a single computer inside a college network. Every computer has the same public IP address on the network. How is it possible, after discovering that the IP is ...
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6answers
8k views

Using Python for security

I love using Python for the scripts I need and for work. But I really want to learn Python for network security since I will start a NS course next year. My question would be how would it be the best ...
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1answer
71 views

How to configure Kismet to redetect same BSSIDs in a loop?

So I am working on a tool to detect any wifi device using Kismet. When I use Kismet, it works fine, but my problem is, it detects a device once, and until the MAC changes, it wont detect it again. ...
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1answer
108 views

What is the risk that Windows 8's loopback protection feature protects me from?

Windows 8 requires Fiddler to set up an exemption when sending traffic to localhost. Since this is a default setting (and affects many computers): What security benefit does this provide How can I ...
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6k views

How much can someone see from my iPhone by connecting to my wifi

How much can someone see from my iPhone by connecting to my wifi and can they copy my messages files documents etc
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33 views

internal proxy server vs DMZ proxy server

What would be reason for placing a proxy server in a Demilitarized Zone (DMZ)? I understand that a DMZ is a separate network to your internal network (lies inbetween internal network and firewall). I ...
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1answer
85 views

is UPnP / NAT-PMP really necessary today?

The possibility to enable port forwards for any hosts inside the LAN has of course security implications. The problem from my point of view is not that there are bad users, but bad hosts/programs and ...
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4answers
625 views

Are custom protocols insecure?

So, I know rolling your own security is ill-advised, but for simplistic things like communicating with a home server, say, updating a grocery list, is a custom protocol fine? It won't be doing ...
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1answer
94 views

When does one require netbios?

I've heard others talk of disabling netbios, but over the years I have never understood exactly when this protocol is required. The wikipedia page explains very abstractly what it is, but not which ...
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1answer
43 views

Identifying attacks by network activity

Is it posible (and how) to tell from a network dump if there is a buffer overflow attack, DoS or brute force attack? A DDoS would be more obvious to identify, but those attacks mentioned above I think ...
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2answers
119 views

What prevents this session hijacking from occurring? (SMB/CIFS example)

SMB/CIFS (file sharing, Windows environment) I understand when a client connects to a server there is a challenge/response system in place. However, once the client is connected that "connection" is ...
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3answers
970 views

Is there any solution for block the HTTPS traffic using URL filtering?

The URL filtering can block the HTTP traffic but not the HTTPS traffic in Internet Explorer. For example, the website http://www.facebook.com is blocked by the URL filtering while the ...
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1answer
25 views

Analyzing UPnP entries from home router

I'm using a tplink router for my home LAN and just noticed that in the UPnP section in its control panel there are two entries with App description: Teredo of tipe: UDP and ports: 55566 and 49868 How ...
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2answers
91 views

Is scraping this website legal? [closed]

I'm thinking of developing a third-party client for Quora in Windows Phone. There are a few but they just run Quora in a mobile browser. The problem is there is no public or open APIs of Quora. And ...
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1answer
35 views

Throttle network based on OS [closed]

What do I need to learn/know to throttle a clients network based on his/her operating system. For example: Someone in my network using Kali Linux... I would like to throttle their traffic to ...
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1answer
47 views

how to trace or get evidence you've been hacked [closed]

my devices and my network have been compromised. I foolishly left my router unprotected and they were able to gain access to all my apple devices and then install some sort of software that will take ...
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2answers
151 views

What kind of attacks can happen on port 80

I am a novice to network security domain. For one of our clients, we are trying propose a network model where an Apache proxy/web-server which will be the only one that is exposed into the ...
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0answers
35 views

Traffic anonymization through routing - software and algorithms

I stumbled upon an interview with "the grugq" in which he is talking about how hackers anonymize their traffic, i.e. hide their original ip address (- this is also what I will mean by "anonymizing" in ...
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1answer
206 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 ...
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1answer
38 views

Can we build network topology using passive fingerprinting?

Can we use the tools such as P0f, OSSIM and other passive fingerprinting tools to build a comprehensive network topology of how the devices are interconnected ? or is there a passive finger printing ...
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1answer
68 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 ...
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2answers
284 views

LTE networks and MITM

2G would leave you vulnerable to spoofed base stations. 3G tried to somewhat fix that using mutual authentication. Now, I tried to check how LTE handles this but I couldn’t find any usefull ...
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5answers
46k views

What is the difference between SSL vs SSH? Which is more secure?

What is the difference between SSH and SSL? Which one is more secure, if you can compare them together? Which has more potential vulnerabilities?
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2k 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 ...
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2answers
103 views

SSL Finished message contents

Hi everyone I'm little bit confused about contents of Finished Message used during Handshake Protocol.In particular this message (client/side) contains the connection-id originally sent from the ...
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1answer
7k views

How does pfsense block torrent traffic?

I know that pfsense is a very effective tool for restricting bit torrent traffic. I was wondering how it actually manages to do that ? There's not much information available on this. The more ...
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6answers
3k views

Can malware be dangerous even when quarantined?

I am reading a book on network security and when talking about user confusion it writes: "It is not uncommon for a user to be asked security questions such as Is it safe to quarantine this ...
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1answer
122 views

How to further analyze suspicious traffic

I've been monitoring my network traffic with Little Snitch, and today, when launching Chrome, just the default Chrome tab (shows most frequent sites), it alerted me Chrome was trying to connect over ...
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4answers
1k views

Ways to monitor someone's internet traffic

If some authority for whatever reason decides they want to monitor your traffic on a wired DSL connection, how would they do it besides exploiting your OS? What are the other ways assuming the OS is ...
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3answers
12k views

Should SSL be terminated at a load balancer?

When hosting a cluster of web application servers it’s common to have a reverse proxy (HAProxy, Nginx, F5, etc.) in between the cluster and the public internet to load balance traffic among app ...
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2answers
131 views

Will an IP packet to the own IP address ever leave the computer? [duplicate]

I am working on a system that consists of several applicaitons communicating with each other. Some of these applications will run on the same server and some will run on a different one. So there is ...
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1answer
59 views

What Does Putting Each Subscriber of ISP in One Subnet of His Own Mean?

I've noticed that I used to be assigned an external IPv4 from my ISP and a 24 bit mask (255.255.255.0), then it changed to 255.255.255.255, today I was studying IPv4 subnetting and I understand that ...
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4answers
169 views

Are computers on same network as honeypot safe?

If a computer is setup as a honeypot and is on the same LAN with other computers, could other computers be attacked? My thought is that if an attacker infects a honeypot with a worm, this worm would ...
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2answers
306 views

Is it possible to ping a LAN card through its MAC address? [duplicate]

As you can start a PC through its 'WAKE ON LAN' feature on private networks, can you trace someone's online status through their MAC address over the internet ?
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1answer
103 views

IT support and security concerns regarding local VM's

I started working at a large financial institution several weeks ago as a software engineer and despite every other aspect of this job being great, I am haunted by the constant restrictions that ...
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80 views

need network level security alternatives to a VPN

We have a set of servers hosted at a tier-1 provider, and they are currently behind a VPN running on a gateway machine and not accessible to the open internet. Due to VPN instability issues we've ...
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3answers
103 views

How does Network Discovery OFF protect my computer?

Yes, it seems that the computer will not respond to pinging. But any computer with a packet sniffer will be able to see my ip once I send any packet to the router. So basically, if I'm surfing the ...
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1answer
173 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 ...
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2answers
366 views

arp request to a ghost host

All the clients in my wireless network send continuously arp requests to a host that doesn't exist (I've checked its absence with nmap -PN [IP]). The clients use windows 7 and windows xp (here the ...
2
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1answer
138 views

How can I trace a user on my network?

I want to trace a user based on IP Address (or MAC Address) on a Network with about 10 L2 or L3 Switches. Is it possible to know that on exactly which switch and on which port a user with a specific ...
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3answers
7k views

What benefits does Nessus have over OpenVAS?

Nessus and OpenVAS appear to have fairly similar features. Why would you choose one over the other, besides the benefit of commercial support (which isn't available for Nessus Home Feed users ...
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1answer
116 views

How do you stop a hacker with no IP and a dot for their HOST

The entry below is from the visitors log in c-panel Host: . /specific legimate-wordpress-post/ Http Code: 503 Date: Jul 24 09:28:06 Http Version: HTTP/1.1 Size in Bytes: 1118 Referer: ...
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2answers
445 views

3G Femtocell at home: can anybody connect, and is all traffic encrypted?

At our office we have bad reception for 3G. We bought a Femtocell device that provides a 3G connection for one specific mobile provider. This device is connected to our network via ethernet. I cannot ...
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81 views

what type of attack does LOIC do? [closed]

I have used LOIC (Low Orbit Ion Cannon) earlier . Today i was reading on wikipedia that there are many types of dos attacks , namely SYN attacks , HTTP flooding ,UDP flooding ,etc and two questions ...
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208 views

Is it a bad idea to share the ssh host key in a diskless environment?

I am looking at this cluster of student work stations. They are diskless clients which boot from NFS. They also have sshd enabled. All of these machines share the same ssh host key (rsa,dsa,etc), ...