Network Security - securing network infrastructure and connections

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2
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1answer
49 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
88 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
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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 ...
28
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7answers
3k views

Is having Steam installed a security risk?

Speaking to one of our security administrators at work, he insists that Steam is a well understood security risk and it shouldn't be installed on work machines. Saying it's not work related I ...
3
votes
2answers
387 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
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2answers
163 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
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3answers
587 views

How do I restrict network access to LAN for visitors

How do I restrict network access to LAN for visitors? In my organization's premises any outside visitor can come and connect to the LAN ports in our meeting rooms. We have seen that they are able to ...
1
vote
1answer
269 views

Packet-filtering firewall evasion (Scanning)

Context I'm very familiar with different applications of scanning tools (. . . and you can use -mtu to specify the size of the fragments in nmap . . .) but every piece of information I read about ...
0
votes
1answer
597 views

My WIFI (with my own password) is connected to our office network. Is it secure? More details

Is there a possibility that they can see my browsing history, media transfers, Skype sessions and even FaceTime? Please tell me.
1
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2answers
94 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
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 ...
1
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4answers
220 views

untangle server at work place privacy

When I am browsing in an environment where Untangle server is installed, can the network admin track everything I do? for example: Skype chat messages Personal emails (Gmail, Yahoo)
2
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2answers
293 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
66 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 ...
4
votes
3answers
6k 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 ...
22
votes
4answers
6k views

Are popular porn sites more likely to be infected with malware?

I'm trying to help my friend understand this because he believes that since a site is very popular, that it's less likely to infect its viewers because of its security! Is a popular site less likely ...
22
votes
6answers
20k views

Security risk of PING?

I have been told that PING presents a security risk, and it's a good idea to disable/block it on production web servers. Some research tells me that there are indeed security risks. Is it common ...
0
votes
1answer
897 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 ...
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 ...
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
127 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
55 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 ...
14
votes
2answers
867 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 ...
0
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1answer
45 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 ...
3
votes
1answer
135 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 ...
45
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6answers
16k views

What techniques do advanced firewalls use to protect againt DoS/DDoS?

It is hard to protect a server against Denial of Service attacks, DoS/DDoS. The two simple ways I can think of is to use a server with much resources (e.g. CPU and memory), and to build the server ...
1
vote
1answer
187 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 ...
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
131 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 ...
1
vote
0answers
71 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
1answer
68 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 ...
0
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3answers
96 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 ...
71
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6answers
69k 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?
0
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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 ...
2
votes
2answers
2k 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: ...
8
votes
1answer
646 views

What are the main issues and best practice security controls when exposing SIP and H.323 to the Internet?

What are the main issues and recommended controls when exposing SIP and H.323 to the Internet (could be for voice, video, and instant messaging traffic or all three)? Specifically I'm looking for ...
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 ...
0
votes
1answer
99 views

Puzzle: network intrusion or OpenDNS/Disconnect.me collision?

My home / home-office network uses OpenDNS as a content filter. As the OpenDNS admin, I received a "User wants access to..." email indicating that someone tried to access a blocked site and requested ...
-1
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1answer
9k views

How to get a Network's WIFI Password through CMD? [closed]

I found that Wifi's Password can be retrived using the network and sharing wizard in Windows, And Technicaly theres no way to store Passwords/collection of bytes in the memory after switching/shutting ...
1
vote
2answers
97 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 ...
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 ...
0
votes
1answer
89 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 ...
1
vote
2answers
171 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 ...
13
votes
5answers
14k 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.
7
votes
4answers
1k views

Verify Mac firmware is not hacked…how to do?

I have a late model Mac computer. I allowed someone to plug in a USB drive, and my network activity changed afterwards. Normally, Little Snitch will report every app that uses the internet. Every ...
3
votes
1answer
250 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. ...
1
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3answers
67 views

What Mechanisms Keep Network Processes (and Applications) Sandboxed

This question stems from my other question, sorry if it is too similar. Now I would like to know what mechanism is used to sandbox network processes and (if relevant) individual programs, if at all? ...
1
vote
3answers
93 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 ...