Network Security - securing network infrastructure and connections

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6
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2answers
3k views

Scanning my network with NMAP

Each computer is assigned one ip address on my network, and my ISP supplies one IP for my network. If I try to scan the ip supplied by my ISP what I got is the OS running on the router, running on the ...
6
votes
1answer
1k views

Security Operation Center (SOC)

I am looking for resources and details on establishing a security operation center (SoC) or network operation center (NoC) based on ITIL or any other applicable regulations. Where can I find good ...
5
votes
5answers
296 views

Does the method of Internet connection affect the security of your the network?

I was just visited by some door-to-door salesmen from a local ISP/TV/Phone provider. During our conversation, I raised some concerns about the fact that I knew their help desk techs had back-door ...
4
votes
1answer
264 views

Can I isolate a specific computer on my network?

My brother gets malware infections practically every week. Apparently he had a infection over the past 24 hours, I only noticed it because I checked the router logs and saw a massive amount of network ...
4
votes
0answers
36 views

How does BGP filtering work to prevent routing hijacking? [duplicate]

I've been reading for a while but yet do not properly understand how is BGP filtering used to prevent "attacks" such the recent Indosat's problem. Do not copy&paste Cisco's site, I have read all ...
4
votes
2answers
2k views

How do the root servers get updated with my name server? Is WhoIS information always in sync with the root?

I've never understood what happens behind the scenes when I go to my registrar and enter in my name server's information. Can someone elaborate on what happens when an update is made, and how it is ...
3
votes
5answers
1k views

Building my own Darkspace

I have searched through the internet about creating a darknet and there is a confusion. There are two definitions, the first one is network used for private p2p (like freenet) and another one that ...
3
votes
2answers
712 views

Reveal the True IP of a User

Is there any best practice method (and preferably documented) way of revealing the True IP of a user using a HTTP(S) connection? I.e.: To be able to uncover the true IP from transparent as well as ...
2
votes
2answers
2k views

how to identify p2p on network

Im trying to work out if the traffic in the below image is P2P file sharing? If you notice the source ports are all random but the time 17.24 from c.port 58338 runs for a good length maybe about 400 ...
2
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2answers
2k views

Is it possible to change the admin user/password remotely on a router without logging in?

Is it possible to change the admin user/password remotely on a router without logging in? If yes, how so?
1
vote
2answers
182 views

Isolating guest networks

I'm setting up a secondary guest wifi on my router and I want to make sure that it's impossible for clients connected to the guest wifi to access my primary network. Initially, I used IP filtering ...
19
votes
3answers
2k views

What are the risks of using a CDN to speed up my website? How do I avoid them?

Content Delivery Networks (CDNs) are well known to speed up the performance of a website, but they create the obvious security risks if someone were to change the code that resides on the CDN. What ...
10
votes
4answers
3k views

Is NTP vulnerable to DNS poisoning or spoofing attacks?

Scenario: Attacker somehow compromises the DNS lookup for the NTP server used by the victim (a web application) Victim sends DNS request for e.g. ntp.pool.org, which is responded to by attacker to ...
9
votes
2answers
514 views

How does the Copyright Alert System work? Who has implemented it?

Some ISPs are participating in a Copyright Alert System that notifies content authors of violations of their copyright. I'm concerned how this oversight relates to my private traffic, and what laws ...
8
votes
3answers
3k views

Security measures for a WiFi access point?

I am planning to purchase a program that comes with an App that allows you to control the program via phone. The developer told me that the connection will be done via an extra WIFI box connecting to ...
8
votes
3answers
1k views

Secure PXE network OS installation

How can one make sure that when PXE is being used to boot a remote operating system, that the data being sent is encrypted (or at the very least that integrity is maintained)? Would it be possible to ...
7
votes
6answers
246 views

Why shouldn't I run other applications on a Firewall?

If I want to use Ubuntu 11.04 as a Firewall in SOHO environment, then I just can't figure out what is the bad thing about installing GUI on it (e.g.: XFCE)? The only opened port to the world (wan ...
7
votes
3answers
430 views

Popularity of Anomaly based IDSes

I've been reading quite some time about anomaly/behavior based IDSes for Web servers. I understand the downsides: possible high false positives, learning phase, constant training. My question is how ...
6
votes
1answer
8k views

Are open ports dangerous?

I have forwarded port 80 to WAMPServer and 25565 to the MineCraft-server running Bukkit. (http://www.bukkit.org/) Am I vulnerable to attacks. Can hackers attack me if WAMP-server is running or if it ...
5
votes
3answers
512 views

How did the spammers get this address?

A few months ago I configured a test mail server on Amazon AWS, all legit. I used a new address to my catchall-domain (something similar to, but not exactly, ...
5
votes
2answers
960 views

How can I use nmap to distinguish between a normal linux machine and an android device?

According to this link: here, nmap 5.2 onwards is now supposed to detect android smartphones. I am using nmap 6.01 but it only identifies android devices as running a linux kernel.
5
votes
5answers
5k views

Preferred UAC configuration in Enterprises that use Login scripts to map drives

In Windows 7, Vista and newer OS's, UAC will prevent logon scripts from mapping hard drives so that the following logon script code won't work: Dim WshNetwork Set WshNetwork = ...
5
votes
1answer
2k views

Is indirect access to a computer as bad as direct?

I'm deploying a web-based ERP system for a customer, such that both the server and the client machines will be inside the customer's intranet. I was advised not to allow the server machine to connect ...
5
votes
4answers
464 views

Is there a way to identify the host of a malicious VM from across the network?

Scenario: Someone is attacking your network. However, they're not exactly using their machine to do it - they're using a VM running on their system. The VM's network adapter is configured in ...
4
votes
2answers
829 views

Securing remotely accessible IP cameras that do not support HTTPS

I have some IP cameras set up on my home network, which is WPA2 protected. These cameras are setup to be accessible from the Internet thru my router's DDNS address, and port number. So for example, ...
4
votes
3answers
2k views

Opensource NetFlow generator

Cisco routers are able to generate NetFlow flows that can be captured and then analyzed in order to manage what is going on on your network. Unfortunately, I don't have a Cisco router in my toolbox so ...
4
votes
2answers
2k views

incoming packets in server

I have enabled iptables logging for packets coming from the outside -A INPUT ! -s 192.168.218.0/24 -j LOG Now i am seeing lots of incoming packets from unknown addresses Jun 5 14:54:56 localhost ...
3
votes
1answer
553 views

What is known about the sirefef/zeroaccess malware/botnet?

There appears to be an increase in p2p communication among botnets that has been attributed to the sirefef/zeroaccess malware botnet. What is known on this particular threat?
3
votes
2answers
437 views

1 PIX firewall, 2 routers, 2 switches. Please answer a couple questions about hack lab

I bought a bunch of cisco equipment for a project and I got 1 PIX firewall 2 switches and 2 routers This is my plan for a topology but I am new at this so I need help. I am basing this off the ...
3
votes
2answers
2k views

What is more secure: ISDN, Cable Modem, DSL, T1, etc…?

This discussion came after showing a friend this Security.SE post regarding DNS attacks, and after reading about a Cable Modem MITM attack. Given the current options available to consumers, what ...
3
votes
4answers
290 views

What does a switched network protect us from? What does it not protect us from?

There seems to be some misconceptions regarding what a switched network will protect us from, and what technologies/precautions a secure environment requires when segmenting trusted users from hostile ...
2
votes
3answers
1k views

Identify a process that uploads data

I am using the tool "Internet Traffic Agent" to monitor my in- and outbound traffic. It shows me clearly that over a period of approx. an hour, some process on my machine is uploading data, about ...
2
votes
2answers
12k views

Router admin password was changed, how did this happen and how to prevent [closed]

Internet was extremely spotty for about a week. I was on/off cycling the cable model and router almost daily, before I tried to sign into my router (198.162.1.1). When I did I was presented with a ...
2
votes
4answers
477 views

Detecting and filtering data over AC power lines?

Given that it's possible for the average consumer to send covert signals over normal AC lines how can an IT department identify and filter out this communication? I'm not sure how difficult this is ...
2
votes
3answers
1k views

DDoS on LAN: How to Defend?

DDos on a wired network has to be extremely rare, since the intruder has to be physically connected to the network. However, let's say that it still managed to happen. How would you be able to defend ...
2
votes
3answers
409 views

Repudiation in Copyright Infringement (BitTorrent)

Seeing this question : How can alleged illegal downloading be detected? sparked a question I have had for a long time. How does repudiation/non-repudiation work in such cases ? Argument: It is known ...
2
votes
1answer
4k views

What are SSDP notify requests and where can I find out exactly what this traffic is?

What is a SSDP protocol request with notify http/1.1 ? How can I find out what this network traffic is?
2
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2answers
193 views

Which private-key encryption should I use for server to server communication?

I am tempted to write my own which covers: Checksum to ensure data is not tampered with. Long and multiple rotating keys so that it is (practically) impossible to decrypt. Will use /dev/random for ...
1
vote
3answers
239 views

Could a neighbour see my traffic when we have cable Internet?

Is it possible that a neighbour could see my traffic (*), when we both have cable Internet? Or: Under which conditions might this be possible? I would assume, "Never!", but after reading these two ...
1
vote
1answer
7k 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
1
vote
4answers
276 views

Learn about network and security for securing a server

I'm setting up an OpenBSD server that I want to connect to the Internet (it's going to be used to host a site - so, with Apache, SQLite and the like). I want it to be as secure as possible. Social ...
1
vote
1answer
187 views

Maximum protection on a computer network?

I would like to secure as much as possible a computer I am using to sync sensitive data files from work to my home pc. The syncronisation is being done by only 1 software is there a firewall to allow ...
1
vote
1answer
201 views

Can accounts still be logged onto if Password Caching is not enabled?

This is kind of an extension of my other question.. If you were not storing any of the passwords locally (caching disabled), would a user some how still be able to circumvent around this security ...
0
votes
1answer
160 views

Hacking Gmail with 92 Percent Success - Does popular GUI framework designs reveal UI state change ?

The media has been claiming for the last 2 days that GMail can be hacked . http://www.cnet.com/news/researchers-find-way-to-hack-gmail-with-92-percent-success-rate/ They have based their ...
0
votes
3answers
351 views

Why there are uninvited incoming packets to my ADSL connection?

To verify this, I boot my PC from Kali Linux live distro. Before establishing ADSL/PPP connection, I start Wireshark and listen on any pseudo device. Then I create the connection to ISP network. ...
0
votes
1answer
332 views

Is using a local DNS cache server more secure than using a DNS server from a router?

Is using a local DNS cache server imore secure than using a DNS server from a router?
-8
votes
1answer
148 views

Viable way to ruin a milk corporation? [closed]

Hack into their system and change the "Sell by" date so that it is immediately bad. How long do you think until they notice, if you pull it off?