Network Security - securing network infrastructure and connections

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2answers
64 views

Security risk of a service that allows a user to test from connectivity from a server to a printer

What are the security risks in adding a feature to an application which allows users to test for connectivity from a server to a printer? I'm planning to add a feature to my application to allow ...
3
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1answer
87 views

VPN Authentication and Network Administrators

Is it possible for a network admin (or attacker) to monitor traffic sent to a VPN server during authentication and end up being able to decrypt the data as if they were the legitimate user? I don't ...
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0answers
149 views

Attackers on sc.imp.live.com [closed]

"Deceptive site ahead Attackers on sc.imp.live.com may trick you into doing something dangerous like installing software or revealing your personal information (for example, passwords, phone ...
3
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0answers
105 views

Different IPv4 numbers from different browsers, same computer

If I search on Google the words "my ip" using Firefox, Google returns a IP that belongs to my ISP: About 447,000,000 results (0.46 seconds) 200.x.x.x Your public IP address But, if I made the ...
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3answers
5k views

Running windows in virtual machine, should I bother with security?

I'm running Windows in a virtual machine on my mac (via Parallels). Should I bother installing antivirus, firewall and using other conventional wisdom practices (like don't open unknown .exe etc)? I ...
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3answers
160 views

Using more routers makes my PC safer?

I have a router and my ISP provided me a new router. Makes sense using the two as PC -> router1 -> router2(internet) or I'm just slowing (small, 1 or 2ms) my internet for nothing?
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1answer
56 views

How to add scripts in HTML file passing through network? [closed]

how to add JavaScript file to every HTML document that is passing through your network ?
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0answers
32 views

Is there an easier way to test suricata has enough resources to run without losing packets?

I'd like to see the effect of changing my Suricata hardware and software, and in particular make sure I can determine the rate above which I'll start to lose data. I'm running ESXi with 20 cores and ...
19
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4answers
2k views

Detect non HTTP packets using port 80

We are currently doing port whitelisting on our firewalls which is working well but this of course does not prevent the implementation of side channels or the misuse of these ports for other purposes. ...
1
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1answer
135 views

What are the advantages and disadvantages of installing an operating system through network? [duplicate]

Netboot is a technology that allows a computer to boot through the network, instead of starting on a hard drive, USB stick or DVD, it connects to a remote server to retrieve a disk image to start. It ...
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2answers
88 views

Determining Firewall settings (Ports, etc) for specific applications

How can we identify the network or network firewall requirements for a Desktop or Web application. Meaning what ports are required by the applications. How the Cloud and non Cloud networks communicate ...
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0answers
16 views

Where can i find information about Ipsec Xfrm framework?

I have searched online and found very little information about the ipsec xfrm framework, including the book Networking implementation and Theory.. Where can i get more information about xfrm ...
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2answers
150 views

A question about arpspoof command

The arpspoof command will spoof default_router_ip's MAC address on all victims in the subnet arpspoof -i <NIC> <default_router_ip> How does it fool the router about the MAC addresses ...
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1answer
78 views

is it possible to intercept network packets outside lan?

User A is in a different country than user B and they have different IP ranges and ISPs. Is it possible for A to intercept B's communication sent to a third party, without using techniques like ...
2
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1answer
46 views

Is a “standalone WPS server” possible?

Wi-Fi Protected Setup (WPS) is a network security standard to create a secure wireless home network. It aims at simplifying the enrollment of WiFi devices in a WiFi network (via a PIN, a ...
2
votes
1answer
73 views

Linux (!) Network Architecture for CTF-scenario [closed]

My boss recently enrolled me in an InfoSec training. I am part of the network team, but have limited experience in InfoSec. My first assignment is to draw a layout of a network that will be used ...
60
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4answers
6k views

Why should servers be placed outside of the corporate network?

In an answer to How do you deal with massive port scans?, user tylerl said: ... And you, like a wise IT admin, run all your servers elsewhere on the internet, not inside your corp network, for a ...
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0answers
162 views

Isolating Computer on Home Network Using Multiple Routers

My goal is to isolate a computer on my home network. This computer (a rapsberry pi) should be considered untrusted and is accessible from the internet (port 22). I need a solution that will prevent ...
27
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4answers
4k views

How do you deal with massive port scans?

This morning I was looking through firewall logs and saw there were about 500 packets marked as port scan. The scanning range was from 1000-1200 5000-5200. The IP address is 85.25.217.47 which seems ...
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1answer
81 views

Would you typically want to monitor all ports for NIDS monitoring? If so, is span port or network tap the way to go?

We're setting up NIDS monitoring and the bosses want to monitor all the ports, but I'm wondering if this actually makes sense. The switch we're currently using can only mirror 4 source ports to one ...
3
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1answer
69 views

Can still ping from secure network?

I have a standard network and wanted to make a more secure one so I bought a second router and set it up as a separate network daisy chained so it can get internet. I managed to make the setup, with ...
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4answers
159 views

Which of the TLS/SSL and IPsec protocols is effective?

Which of those two protocols is the most effective for sending data from a client to a server on a local network (knowing that I aim to use it for FTP traffic)?
2
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1answer
123 views

Linux responds to ARP requests for other interfaces - could this be a security vulnerability?

Linux responds to ARP requests on all interfaces by default. To explain, say you have this setup: Client 1 ---> [eth1] server [eth0] <--- Client 2 And the server's eth1 IP is 192.168.1.1 and ...
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3answers
265 views

How can I find an unauthorized/unknown proxy on my home network?

I recently started receiving an error while trying to stream netflix that I'm using a proxy. Exactly this error code here: https://help.netflix.com/en/node/277?ba=GSButtonClick&q= My problem is ...
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4answers
351 views

Is it possible to hack a single computer without injecting a payload or a virus? [closed]

I know the ways to hack a computer or a mobile phone by injecting payload using some exploits with metasploit. We can inject a exe, or we can use pdf file, or docx file as I know. I wonder the ...
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0answers
26 views

airbase-ng: How to apply `iptables` rule to packets on `at0` tap-interface

airbase-ng: How to apply iptables rule to packets on at0 tap-interface Reading a tutorial on the net, I see this iptables command used with the tap-interface at0, created by airbase-ng. iptables ...
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2answers
170 views

Computer Security vs Privacy

Probably this is a redundent post but in fact I have been searching online about a precise clear distinction between computer security and privacy. I'd like to know the difference of between them ...
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2answers
153 views

Beginner > Medium > Advanced Books/Guides/Tutorials on TCP/IP [closed]

Long time web developer looking to get into infosec. Was hoping on guidance on material from a beginners stance on TCP/IP and hopefully "networks". I realise the massive generalisation I'm making but ...
3
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1answer
78 views

How can I view images in forwarded packets on (current) Mac OS X?

How can I view reassembled images on a Mac being used as a router? I'd like to do this as a demonstration of how HTTP doesn't provide privacy. I've done some research, and on Linux there's a tool ...
4
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3answers
267 views

How does a Man In the Middle attack happen in reality

I am trying to improve the MITM protection of an iOS app I am responsible for, so I want to understand exactly how it happens. I have set up Charles to act as a proxy which required setting the proxy ...
4
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1answer
216 views

Pros and cons of disabling TCP timestamps

So, lynis informs me that I should unset net.ipv4.tcp_timestamps. I know that's a bad thing because an attacker could figure out which updates that require restarting the machine I haven't applied, or ...
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0answers
38 views

Is the OS the exclusive “owner” of the network traffic?

I boot up a fresh OpenBSD on a notebook. The notebook has an ethernet port and a wireless card. Does all the traffic on the ethernet and wireless goes through the OS? So if I shut down the ...
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2answers
302 views

How to route all traffic through TOR?

I have TOR setup on my macbook and I configured my wifi connection to use TOR's SOCKS Proxy that is running on port 9050. When I check my connection it confirms I am browsing through TOR. However, ...
4
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1answer
126 views

Evil Twin attack: How to make client send WPA2-PSK password when asked for AP-password? [closed]

How can an Evil Twin attack be set up, so that the client will be prompted for a password and send it in plain text? Is the above even possible? I have already set up the fake AP, but it must be ...
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2answers
90 views

Defense in depth

How is defense in depth strategy different from network security policy? What is the need to name it a "Defense In Depth", although you may simply name it "Network security policy"? Secondly if DID ...
0
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1answer
59 views

Is it safe to host passwordless web applications/software with web GUI in Virtual Machines

I have a Linux Mint Virtual Machine which I use quite a lot with my Windows host. I have lots of Software installed there (mostly with web GUI so I can access them from host easily). So I am ...
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1answer
54 views

Eavesdropping and sniffing attacks [closed]

Assume we have two routers connected by a link. Speaking of eavesdropping and sniffing attacks, does it technically appear at link itself or at the routers? If at the routers, does it imply that these ...
3
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0answers
230 views

Security for Hospital IT

I'm developing a program in Java intended to be utilized in a hospital. The system uses RMI internally between workstations and the server program. The program would be installed on the hospital's ...
0
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1answer
95 views

Hiding using VPN

I have just connected to a vpn server in my University using Cisco AnyConnect. But when I check http://whatismyipaddress.com/, it still says that I'm in the same country as before I connected to the ...
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2answers
89 views

Understanding the behaviour of existing eavesdropping techniques

I am studying the behaviour of existing eavesdropping techniques (part of my research). I have a question through the following scenario: Suppose Bob lives in New York and wants to listen (i.e. ...
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1answer
119 views

Which method is the best for IDS : heuristic or signature based? [closed]

In signature based IDS: it maintains a database of the signatures that might signal a particular type of the attack. Problems: New attack that has been specifically constructed in order to not ...
-4
votes
1answer
47 views

Using stingray against police (idea) [closed]

This is focusing on UK mainly, where police radios are similar to mobile phones. Pretend it's possible to buy Stingray, the IMSI scanner. Pretend Jimmy is a criminal, waiting for a police raid at any ...
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0answers
16 views

Using Digital Signatures in isolated networks

Is it possible to use Digital signatures in isolated environments which do not have access to internet and work only on internal network. How does the certificate authentication happen in such case
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4answers
278 views

My email hacked

Someone has definitely gained access to two of my alternate emails. I know this by looking at the login activity. By looking at the email logs I discovered that the IP that is always gaining entry to ...
0
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1answer
140 views

A seemingly innocent program is attempting to connect online. Should I be worried?

OS: Windows 10 64-bit updated, usually used for development and Steam-CSGO. Straight to the point: Solitaire just tried to connect to the internet. Details: After tightening my firewall rules after ...
0
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0answers
22 views

What stops a man in the middle attack from intercepting SSL encrypted data and sending it with a spoofed ip address to the server? [duplicate]

Say you have a client that connects to a server using SSL. The server, upon receiving a certain command, launches a missile. Then say there's someone in the middle of the connection listening to the ...
0
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1answer
118 views

How to secure wireless (Wi-Fi) home network [closed]

What are the countermeasures to make home wireless network secure, which will both prevent others from stealing internet and will also prevent hackers from taking control of computers through your own ...
3
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1answer
63 views

Blocking all incoming traffic, will it still accept a response from a request I initiated?

I am a 'newbie' when it comes to firewalls, but I am trying to launch some machines that will connect to Facebook's Graphs API. I only want these machines to contact Facebook and nothing else. By this ...
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3answers
141 views

Why limit internet access while connected to a remote desktop?

I work in the nuclear industry, and sometimes we have some strange (but understandable) standards for information security. I have encountered one which seems odd and would like to know the potential ...
4
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1answer
106 views

Is it good idea to use a access point MAC address as wifi password?

I realized that one network I'm connecting with is using a MAC address of one of its interfaces. If an attacker would know that fact, could he somehow obtain the MAC address wirelessly and break ...