Network Security - securing network infrastructure and connections

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3
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1answer
339 views

How is a Tor hidden service immune to exit node attacks?

Let me explain with a nifty diagram: IP/RP <-> bunch of Tor clients/node (Tor circuit) <-> Tor hidden service Wouldn't the last Tor client in the circuit knows that the message is for the Tor ...
5
votes
3answers
4k views

with IPv6 do we need to use NAT any more ?

I'm wondering how to use NAT with IPv6 ...seems that you don't even need it any more. So what exactly is the concept behind firewall configurations in IPv6 environments?
0
votes
1answer
168 views

SIEM v/s Network Forensic

when SIEM is already implemented in a enterprise network; does it not do all tasks and report like network forensic investigation? Or can we do away with SIEM and have only Network Forensic tools ...
1
vote
1answer
228 views

Disabling Ping/ICMP Requests [duplicate]

Are there any benefits from disabling Ping/ICMP requests on servers? I've read where people say to do it but I can't seem to find any real benefits with it. Only more likely to cause more problems. ...
2
votes
2answers
456 views

What order is best for nesting VPNs?

if anyone is available to give me advice on a VPN situation I'd appreciate it. So the story is, I have one Swedish VPN which I trust not to log, and which I've connected to with my real IP, and I've ...
1
vote
2answers
151 views

Does this show the need for a two-factor authentication?

I need some help for my understanding while reading through this authentication scheme in WEP. In a WEP authentication scheme, the station first sends a request for authentication. However, this ...
0
votes
1answer
1k views

How to secure my network, laptop, ipad and email accounts which are possibly hacked?

Background Last month I noticed lots of failed emails in my inbox and after few minutes I lost my access to my Yahoo Mail. My friends informed me that they have received spam emails from me. So I ...
1
vote
3answers
301 views

Remote IP scan detected

I would appreciate if you take some time to go over issue I am facing. On my laptop I have windows 7 installed, I am using ESET Smart Security 5.2.9.1. As I work 9 hours day online I am seeing a ...
1
vote
1answer
726 views

Open source video conferencing software with encryption [closed]

A couple of friends and I are looking for an open source video conferencing software. We'd like to run the server on a Debian box, but the clients are Windows machines. Most importantly, it should ...
-1
votes
1answer
100 views

Benefit of having strict ACLs [closed]

My company uses strict ACLs for the connection between two boxes. What are the benefits of these?
1
vote
1answer
83 views

Set Gateway for our LAN

I am new to Networking. In our organization we try to setup gateway for security purpose so that we can block certain harmful websites. All I know is gateway is a device. What we have is the LAN ...
0
votes
1answer
129 views

TCP IN connection from another user in my home network. Is it safe?

I'm using Comodo Firewall and I noticed that sometimes I'm getting TCP IN connection from another IP address in my home network (only one router and few wireless users): TCP IN | 192.168.1.50 | ...
0
votes
2answers
258 views

Isolating host machine from external network

How to prevent a host machine from sending/receiving packets with the following network configuration: eth0 - physical NIC :: not configured; tun0 - virtual NIC for VM which role is the gateway for ...
8
votes
1answer
341 views

Is the system bios and network card protected by the OS firewall?

My question arises from trying to understand new types of spyware that target the system bios and/or network card. Is the system bios and ethernet card both protected by an OS firewall set to deny ...
-1
votes
1answer
223 views

What are the security concerns when connecting to a WiFi network? [duplicate]

I connected my phone to a protected Wifi network that is not my own. Can anyone accessing the same network be considered a threat on my mobile device? Is it easier for hackers connected to the same ...
10
votes
3answers
488 views

Should a hostname ever be considered a secret?

I've been told in the past that you should never give out the host names of computers on your network. I can't think of any reason why this would be the case. Could someone tell me if they should be ...
1
vote
1answer
120 views

SSL on domain will affect un-secured sub-domain

I have a plan to buy a SSL certificate for my domain. I don't have much budget so I decided to buy standard SSL with no support for sub-domains. I have a WCF web-service that works on sub-domain. This ...
2
votes
1answer
139 views

Danger of peer to peer software [closed]

I wanted to ask what are the risks of using P2P software. I found a lot of information on-line regarding the danger of file sharing but not about the software by itself. I am writing a mobile ...
1
vote
1answer
294 views

Limit BitTorrent Sync connections to a specific network

Is it possible to limit BitTorrent Sync connections to a a specific network using the client software? Right now the closest I can come up with would be IP limitations imposed on each client using a ...
0
votes
3answers
164 views

Trace wireless connections in airplane mode

I was wondering if turning on Airplane Mode really disables all wireless connections. If so, anything you do on the phone locally can not be traced, seen, or viewed, hacked, etc. by anyone over a ...
1
vote
1answer
255 views

Sending a skype message by ip or mac addresses [closed]

If I know someone's ip, mac addresses and a computer name in a local wifi network, and also that there is skype running on their computer (and port), can send them a message through skype? Can I find ...
0
votes
1answer
65 views

How to modify data sending by application to the server?

Let's suppose that I have a simple application which is sending data to the server (placed not in my network), for example 0 1 2 3 4 5 (explicit data) in one second delay between each other. Is it ...
-1
votes
3answers
413 views

China CCTV System UDP protocol isn't working

My boss is trying to invest on a CCTV solution that he orders from China, his idea is to market it here after we fine tune the process and configuration and make a few tweaks of our own. It consists ...
2
votes
2answers
255 views

Using a virtual machine as a buffer between USB media and OS

I was directed here from the Unix & Linux site. I've gone through some of the related questions, but they seem to be more concerned about whether a guest OS can access the host OS in someway. ...
3
votes
1answer
360 views

Is it possible to detect host-machine of my virtual-machines?

So basically I need to know is there any way to find a connection (or relation) between packets sent by my VMs and my host machine. In my lab I have lots of workstations, each running a VirtualBox ...
0
votes
1answer
354 views

Hide a machine on LAN [closed]

Is there any way to hide a computer on LAN? For example maybe with a firewall, when someone is going to ping a machine, it won't answer. In other words the machine must answer to router only. I am ...
2
votes
3answers
1k views

Alternative to AirPcap for Linux?

I need to sniff WiFi packets, but according to AirPcap FAQ page, it just supports Microsoft Windows, not other platforms. Does any alternative of this product work in Linux? Please don't offer Alfa ...
1
vote
1answer
187 views

Security w/ Router Behind a Router?

I have a SMB (small-to-medium-business) router (router x) that my workstations run off of in my small business. I wanted to offer my customers wireless internet while they wait for service so I ...
2
votes
5answers
1k views

SYN flooding attack causing high CPU on hardware firewall

I have a ZyWall USG 200 firewall. A few days ago there was a SYN flooding attack on it causing 100% CPU load. After investigating it turns out this was attack from a single IP address and while the ...
0
votes
1answer
215 views

Can you sniff broadband connections? And how you secure that?

I know that you can sniff data which is transferred over wifi. Can you do that with broadband (wired)? And how can you secure the network, so nobody could sniff data both over wifi, and broadband?
-3
votes
1answer
2k views

Google Chrome is keylogger? [closed]

Hi i am a little bit worried that Google Chrome is logging my keystroke. One time ago i had situation with chrome that when i clicked some where in input box he was writting key by key(even backspace) ...
-4
votes
2answers
208 views

What kind of Wi-Fi security protocol does not use encryption?

I need to sniff HTTP packet over the WiFi network. What kind of WiFi security protocol does not use encryption? I mean if I capture the WiFi packets, no effort required to decrypt wireless packets and ...
2
votes
2answers
580 views

Running arp command on public wifi network

I accidentally ran this arp -a on a public wifi network(because it is in my terminal history). I killed the process almost immediately. I want to know if this would raise an alert for the network ...
1
vote
4answers
17k views

How to effectivily block torrents on my network?

Hie, As per my network policy, we have to block all torrent traffic from network. To do this, I used to block all ports above 1024 on my firewall/proxy devices. But due to this, many other ...
0
votes
3answers
135 views

Can a computer's contents be downloaded wirelessly?

So my calculus teacher, who also teaches computer science, claims that a computer's entire filesystem can be downloaded wirelessly by anyone on the same network? As a Ruby on Rails professional, ...
1
vote
1answer
120 views

What are the hardwares used to protect against a DDoS attack on Network layer

What hardware is used to prevent a DDoS attack on a network layer? This question is for my project which I am doing. I have a game server and I need to simulate an attack - an SYN flood. So what ...
3
votes
3answers
826 views

What risks are involved in exposing our home computers over the public internet?

I'm currently running a webserver from home accessible on the public internet via a static IP. Exactly what kind of risk is there in doing so? From what I understand, the setup will not allow ...
10
votes
4answers
2k views

Is my network being sniffed?

Is there any way to find out if someone who is connected to my network is sniffing packets? There is a way with nmap if his card is in promiscuous mode but what if it is passive?
2
votes
3answers
182 views

Do we need to use separate IP ?

I want to open and forward SSH port to one of our internal computers. Problem is - it will use the same IP address as PCI-DSS environment (where the HTTPS payment gatway is running) Basically ...
0
votes
1answer
184 views

How do I map all active wireless devices inbound?

In any residential building, there is a multitude of WPA2-protected wireless access points. Yesterday I was at a friend's and attempted to launch aircrack-ng against their AP (with permission). I ...
3
votes
1answer
376 views

I recently discovered that dsniff had been installed on my computer. What do I do?

I have recently discovered that a co-worker (who has sudo privileges on my machine) has installed dsniff, and it has been there for a while. I have no idea when they ran it (if at all), the only ...
1
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0answers
88 views

IT Security Internship [closed]

I am a student and working in the field of IT Security for 1 and a half year . I want to know about the best IT security companies for Internships and their general requirements in an intern ?
2
votes
1answer
375 views

Does Metasploit's packet sniffing run in promiscuous mode?

I'm doing an educational pen test exercise and I'm trying to sniff traffic from a compromised Windows machine. I've been using the post-exploitation sniffer and packetrecorder Meterpreter modules, ...
-2
votes
2answers
148 views

What does capture filter means in wireshark? [closed]

What does capture filter means in wireshark? Is it same as display filter?
2
votes
2answers
204 views

Physically Blocking All PC Ports?

I've got a laptop that is currently 'Air Gapped' that I want to further secure by locking down the USB ports and NIC. I've disabled the NIC from the BIOS, removed the WiFi and bluetooth modules. But I ...
1
vote
1answer
350 views

Wireshark detecting suspicious messages through jabber protocol, It says it is from my website, no idea what it is

I was doing a network scan on my computer with Wireshark and came up with something very suspicious: I found a stream with the jabber protocol. I do not have a jabber server set up nor do I have any ...
0
votes
2answers
863 views

Windows user: Is having many active TCP connections normal?

Is this normal? Can any ports be "dangerous"? I have 9 tcp's in a listening state, 4 in a close_wait state, and 4 in an established state. Some of them route to odd procceses using PID such as ...
19
votes
5answers
2k views

419 Nigerian scam problem

I fell in a scamming trap. It took me a while to figure it out. Blinded like an idiot. But it is what it is. I can only do as much as I can now. Tell me if there is anything else I should do. After ...
5
votes
5answers
489 views

Can hardware firewalls be infected?

If a computer is directly connected to the internet, it is vulnerable to attacks. So we attach a hardware firewall between the computer and the internet. But doesn't this new setup mean that now our ...
6
votes
8answers
14k views

How to block some websites and torrent usage in a small office?

In my office there are approaximately 25 systems are connected through network and all having internet accessibility.but some people are missusing this facilities like downloading films from torrent ...