Network Security - securing network infrastructure and connections

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11
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4answers
3k views

How to prevent network administrators from accessing USB drive

How can I prevent network administrators from accessing, mapping to etc. a USB drive that's in a PC on their network? I'm mainly concerned about files being edited or deleted.
2
votes
0answers
100 views

Performing an airport scan on my Mac for available WiFi networks pulls up multiple SSID with different mac address. What's going on?

I performed the following command to search for available WiFi networks in my apartment complex: /System/Library/PrivateFrameworks/Apple80211.framework/Versions/A/Resources/airport scan | grep OBC I ...
0
votes
1answer
41 views

Is it possible to bypass sniffing when using port mirroring?

INTERNET <-A-> ROUTER <-B-> PC Let's theoretically think we mirror the port on a ROUTER to a file. So the full network traffic on it. Question: is it possible to still have ...
1
vote
0answers
64 views

Why would home routers accept incoming DNS traffic?

I stumbled upon an interesting paper (PDF Link) where researchers found out that more than 58% of the DNS open resolvers that are blamed in DDoS attacks are in fact home routers distributed by ISPs to ...
0
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2answers
56 views

Place database in the DMZ and in the internal network

Is it sufficient to have single database inside the DMZ which the webservers in the DMZ receives their data from. Or if setup with two databases is a better solution, that would be to have a ...
1
vote
1answer
94 views

What precautions I can take to secure software against user?

I want to build a client that connects to my server and uses server API. You can consider this as a banking application because data security is the most important thing. Since the users or hackers ...
1
vote
2answers
128 views

Possible to detect an/or shut off CryptoLocker by limiting total network bytes transferred?

Since a virus infected PC has to download (encrypt) reupload the entire file (to a file server), and repeat the process for every network drive, is is possible to detect this unusually high bandwidth ...
2
votes
1answer
52 views

Ideas on how I can fragment captured network traffic?

I am trying to create a lab environment where I can analyze common IDS solutions (starting with Snort specifically) and their ability to reassemble fragmented IP trains. I have a collection of ...
0
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2answers
63 views

Is it possible to take back the control from an MITM in progress? [closed]

I heard that MITM also involves DNS poisoning, which basically tells the Net to take a different route than it was supposed to go.. (I'm not sure if my interpretation is correct..) Given there is an ...
-1
votes
3answers
187 views

Can workplace wifi track ip address to an employee's computer? [duplicate]

At my work there is secure WiFi for all the employees. If someone has sent harrassment / sexual harrassment emails to me through the company WiFi, is there a way for my company to trace the IP address ...
2
votes
2answers
148 views

Can changing a MAC address give an attacker more leverage in a network?

Security lessons force us to use limited users (Standard User) on Windows networks. I found that an administrator account can change his MAC address from Control Panel\Network and Internet\Network ...
3
votes
3answers
129 views

Such a thing as too much network segregation?

One of the biggest points of friction I see between networking teams, security teams, and users is around the idea of network segregation. For instance, the network team wants to isolate everyone ...
9
votes
1answer
361 views

Kaspersky Antivirus “secure connection scan” as broken as Superfish?

I've read a lot about Superfish (and similar ad-ware) lately and I basically understand the vulnerability to MITM attacks. But I'm actually wondering if the "secure connection scan" by Kaspersky ...
-4
votes
1answer
50 views

different IP addresses [closed]

I'm new in the Network world so I'm still trying to figure things out. I have a server with an IP address like 192.168.1 etc. There is other devices that communicate and share information with the ...
2
votes
1answer
56 views

Internal network security policy for development environment

What are the best practices for network security for an internal development environment. Besides adhering to updates, antivirus, and firewall. For instance, is it recommended to use an IDS/IPS like ...
2
votes
2answers
61 views

Expose the source code repository externally or allow VPN access?

To allow third party consultants, offshore developers and contractors working on the code, we can expose our Git repository externally. Or we can grant VPN access to the external parties and limit ...
2
votes
1answer
47 views

How to fuzz service with sending bad data?

I am reading a post about fuzzer in Python, here is the code: # Import the required modulees the script will leverage # This lets us use the functions in the modules instead of writing the code from ...
3
votes
1answer
86 views

What's the interest for web proxy over transparent proxy

A network I'm working on has only a web proxy (http, https) to communicate outside (mostly used for cache purposes, not whitelist or blacklist support). This requires lot of configuration to all tools ...
0
votes
1answer
74 views

How does the DNS-spoofer know the original destination of the packet?

It's perhaps my lack of deeper knowledge of how the DNS, NAT or TCP works, but I have been thinking about the following scenario and can't figure out the following problem which arises in DNS-spoofing ...
4
votes
1answer
128 views

Why does my web server receive so many TCP resets from some clients?

I run a web server and log connections that are dropped. Occasionally, I get a burst of TCP RST packets from some of my clients, like this: Feb 11 11:56:29 SRC=1.2.3.4 TTL=57 SPT=38383 DPT=80 ...
3
votes
2answers
379 views

List of most common network vulnerabilities a la OWASP Top 10 [closed]

I am trying to find the most commonly used attack vectors/techniques on computer networks in the style of the owasp top 10, for my thesis work. The reports shouldn't be older than 2-3 years. Can you ...
0
votes
2answers
159 views

Prevent hacking with known IP address and router information on Ubuntu 14.04 LTS [closed]

I’ve had it! It is the second time that a “hacker” (A hacker or should I say thief) has had access to my Ubuntu 14.04 LTS system. The person that I suspect has had physical access to my pc because he ...
1
vote
1answer
91 views

Snort even though working properly does not report majority of rules

I have installed Snort 2.9.7.0 and it does not detect majority of attacks, such as nmap port scans, downloading exe files, opening documents containing keyword "root". I use Snort together with ...
2
votes
2answers
83 views

Determine if compressed or encrypted [closed]

I have a bunch of network data and I would like to determine if it is either 1) encrypted or 2) compressed. I doubt it is both, but the potential exists. If I am assuming that the traditional ...
2
votes
2answers
287 views

I've shared my WiFi with my neighbour. How can I ensure they're not downloading illegal content?

I want to ensure they're not downloading any illegal content (torrent websites in particular). If they're using a VPN or Tor, then I guess there's not much I can do, but if they're just connecting ...
1
vote
2answers
146 views

How to retrieve the MAC address of a remote IP [closed]

I have an IP address, and I want to find the corresponding MAC address. The IP address is in the same city, so we're connecting to the same network. How do I find the corresponding MAC address?
1
vote
1answer
65 views

How can the sybil attack be used on a P2P system that implements DHT?

I was reading about the sybil attack and am unclear on some details. After becoming part of the peer-to-peer network, the adversary may then overhear communications or act maliciously. By ...
1
vote
3answers
97 views

How to organize a CTF?

In the context of an IT event, my team would organize a CTF (Capture The Flag). About the challenges (we’re working on them). I want to have some references on the types and levels of difficulty that ...
9
votes
1answer
455 views

Checksums do not match when I download file over http

Just for the test I did the following: Downloaded a page from wikipedia via wget on remote server and named the file test.dat. Then I executed md5sum. I download the file via http and check it back ...
3
votes
1answer
172 views

What constitutes an exploit? I was able to compromise my common household router

Was setting up Wifi at home today (just using the default router Time Warner Cable provides) and was appalled at the minimal security that the web server provides. Default user name/password is ...
0
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3answers
126 views

Decrypting SSL over a Mobile Network

I work for a large company and we are trying to judge the safety of some proprietary information that is being sent and received in a new application we are developing. After our initial testing we ...
0
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0answers
53 views

Is WPA practically less secure than WPA2 only if QoS is enabled?

I've been looking into attacks that are effective against WPA-TKIP but not WPA2-AES (both using PSK). I've found Vanhoef & Piessens's paper that builds off an attack by Beck & Tews and can be ...
0
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1answer
43 views

Segregating network systems and functions [closed]

I want to segregate network systems and functions so that if an attacker hacks in one area, he can't necessarily reach others. What should be the recommendation when information from one network is a ...
14
votes
2answers
849 views

What's the diff between blocking a port with a firewall and not starting a service on that port in the first place?

I was considering setting up a software firewall (pf) on my web server and did some research on them. Were I to do it, it'd involve basically blocking connections to all ports except 80, 443, and the ...
3
votes
1answer
134 views

Securing my network: unmasking spoofed mac possible?

In Kali you can: airmon-ng start wlan0 ifconfig mon0 down macchanger -r mon0 (-r changes mac id to a random number) ifconfig mon0 up This attack for example: aireplay-ng -0 2 -a [ap mac #] -c ...
1
vote
2answers
203 views

Persistent Connection Attempts By Akamai Technologies

I have seen this question asked in different places, but have never seen a satisfactory answer: On different computer builds, ASUS/GIGABYTE/MSI, I constantly have outgoing connections to ...
1
vote
1answer
56 views

How safe are networking ACLs based on IP-address?

As far as I know, a determined attacker would have no major issues in hacking the IP address of the packets contained by his (web) request. Therefore, I cannot see how an Access Control List (such as ...
1
vote
2answers
124 views

In detail, how does SSL offloading/acceleration/termination work?

What is the in-depth working mechanism of SSL offloading/termination? I could not find literature that would dive deep enough into the subject. Assume the following example, where a intends to ...
0
votes
1answer
67 views

Why do private networks use both X.509 and User/Password authentication

For example, the school network I am on requires both a name & password to log in along with having its X.509 certificate installed in my browser. Why does it need both? Shouldn't name and ...
1
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0answers
69 views

Two similar computeres on same network, different traceroutes (one slow - one fast) [closed]

My SO's computer has a very slow internet connection. So I compared her traceroute to xkcd.com with mine. We are on the same network, on both on os-x. It's a simple 4g home router. tracerouter ...
0
votes
3answers
95 views

Can the packets of a wireless network be sniffed by a user who is not present in that network?

1.If an user knows the frequency used by a wireless network, is he able to collect the packets from that network? Those packets may be encrypted, but can he collect those packets? 2.If the user has ...
1
vote
1answer
185 views

Security criteria for selecting a network switch?

I am looking to purchase a switch with 24+ ports. The set of security criteria that I should bear in mind when selecting a switch is not clear to me. I have tried to take other networking security ...
0
votes
1answer
88 views

Compromised submarine cables and the consequences to internet?

I recently read an article that Google wants to build a submarine cable connecting to my country supposedly to increase overall speed and while I hope my government will never allow this kind of thing ...
31
votes
3answers
4k views

What is the best home wireless network encryption algorithm to use?

What is the best home wireless network encryption algorithm to use? I realize the best answer will probably change over time, and hopefully people can provide updated answers as new standards come ...
1
vote
2answers
96 views

Am I exposing my application to IP address forgery / ip spoofing?

Here is my setup: I will create two REST services that are run on Server B and should only be called from Server A. Both servers are on the same network and I am not able to configure a firewall to ...
1
vote
1answer
47 views

How do you practically manage your never-use-personal-accounts-on-a-work-machine-ever double life, when your personal machine is a limited iOS device? [closed]

This is follow-up to Starting a new job after working at home for years. How to best protect data, secrets, and privacy in the workplace? The answer to that question is Follow company security ...
0
votes
1answer
88 views

Starting a new job after working at home for years. How to best protect data, secrets, and privacy in the workplace?

I have just started interviewing for new computer job after years of working from home. At home I feel very secure with how I protect myself from data loss and keeping my secrets secure. I backup ...
2
votes
3answers
153 views

Parallel systems, in case any of two has known exploits

As software becomes more and more complex it's harder and harder to keep it secure down the entire line. Discussing this problem with a friend we were opting some pretty extreme solutions and wondered ...
1
vote
2answers
167 views

Is a sensitive NAS behind a router safe?

I have four pcs connected to a switch connected to a router that gets connected directly to the internet. How safe is a NAS attached to the same router along with the switch plug? I'd like to have ...
2
votes
3answers
118 views

How can I set up DHCP so that domain devices get a certain block of IP addresses and other non-domain devices get a separate block?

Is there a way for me to set up DHCP so that only domain devices get an IP Address from a certain subnet, say 192.168.12.x, and other non-domain devices would be assigned to a different subnet? Edit: ...