Network Security - securing network infrastructure and connections

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-2
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2answers
99 views

What if I've been hacked and my IP is static? [closed]

My computer has a rootkit of some sort and the attacker can see everything that I do on it. I need it to do something related to banking, so I have to secure my computer first. I have a CD of windows ...
1
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1answer
46 views

How to configure Kismet to redetect same BSSIDs in a loop?

So I am working on a tool to detect any wifi device using Kismet. When I use Kismet, it works fine, but my problem is, it detects a device once, and until the MAC changes, it wont detect it again. ...
2
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0answers
40 views

What causes wifi network connections to timeout? [closed]

i was wondering what actually causes wifi network connections to timeout. for instance, say my laptop is connected to my wifi and i yank the battery out such that my laptop can't send any proper ...
2
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1answer
45 views

How to calculate CVSS of an attack so that it matches those in CVEs?

I have drawn an attack graph for a file-sharing application (eg. Dropbox) where a database stores details of virtual machines Eg. memory space left, etc. I've listed some possible attacks: The ...
1
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3answers
40 views

Splitting IP suite?

Is it possible to split the TCP/IP suite layers? I mean to get the original data packet with its all headers & trailers out of the Link Layer before delivering them to the physical medium, and ...
0
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2answers
114 views

What could be the reason for the high traffic on the local network? [closed]

In our small company we have very high traffic outbound from local network to server which is getting blocked, and slow downs our server respond time. Especially at night. I am not security ...
1
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1answer
117 views

How should IPSec be configured to provide a protection at least as good as my current Stunnel configuration?

In private network (as in using a private IP address space) at a cloud provider, other customers have access to the same private network. I have secured the communication between many hosts and ...
1
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3answers
174 views

Detecting(and locating) rogue DHCP server on a local area network

How would we detect and locate a rogue DHCP server on our local area network?
0
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1answer
133 views

How CDN operator will decide content fo me if i am using google public DNS [closed]

As i saw most of the internet is being load balanced even at DNS . And DNS load balancers takes decision on behalf of client's DNS . So I Am just curious to know if i will use 8.8.8.8 as nameserver in ...
1
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1answer
85 views

Internet monitoring and DNS encryption

If someone hides their DNS traffic by encrypting it with a service such as OpenDNS's DNSCrypt, would you still be able to see which URLs they're viewing? Also, if that person uses HTTPS 100% of the ...
0
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3answers
132 views

Malware stole an executable file on my computer? Seems unlikely

If you don't want to read all of the details, skip to the bottom; I'll make a summary. I created a computer program as a proof of concept (I threw it together in 12 hours, so I wrote it in Visual ...
0
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1answer
90 views

Do the Linux binary blobs contain any intentional security holes?

This question covers the risks of accepting Binary blobs in one's distribution. This may be a very paranoid conspiracy question. But considering all the topics regarding the NSA in 2013 one cannot ...
1
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1answer
86 views

How are ACK storms created and what's a good mitigation strategy for them?

The context is network based load balancers. It would be nice if someone could explain how TCP ACK storms are generated in real life and practical mitigation strategies for them. Edit: Clarification ...
1
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2answers
74 views

Why do client certificates not protected against improper server certificate validation

I understand the question of client certs and MITM attacks has been asked several times, but I don't believe this specific scenario has been answered. It was my (seemingly incorrect) assumption, that ...
0
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1answer
82 views

Securely transmit sensitive data

I am creating a java application which is dependent on a server. On startup the application will transmit sensitive information (passwords and emails) which will be sent to the server and from there ...
0
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3answers
125 views

How to safely mirror network traffic for audit reasons?

We have an internet connection that we need to audit: INTERNET ->> ROUTER ->> CLIENTS our idea would be to put a (enough big) HUB before the router (router, that logs in via pppoe to ...
3
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2answers
292 views

Why do multiple IP Addresses in my local network point to the same computer?

I'm new to linux and nmap, and I am attempting to do a scan of my local network. Using nmap I find that there are 4 hosts on my network (10.0.2.2, 10.0.2.3, 10.0.2.4, 10.0.2.15). I am using VirtualBox ...
13
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6answers
1k views

Defamatory post - obtaining evidence tracing perpetrator right to his laptop

A month ago, someone posted an ad with my personal details, including my home address, my phone number and my photo on an ad with very a very defamatory write up. What followed was a week of calls ...
0
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1answer
46 views

Industry standards for threat names

One of the security appliances we own reports a so-called "Industry Name" for the threats it detects on the network. I wanted to know if there is really such a standard and where I can find ...
0
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1answer
121 views

Cryptic threat names

I have logs from a security appliance from Damballa which has cryptic names for threats observed in a network which I am trying to make sense of. Some examples of these threats are "RedTreeBruisers" , ...
0
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1answer
251 views

Protecting MYSQL with Fail2Ban? [closed]

I have a bunch Raspberry Pis collecting data from behind client firewalls. I want to start sending this data to MYSQL server. Because the Raspberry Pis do not have static IP addresses, I obviously ...
5
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3answers
391 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, ...
1
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1answer
65 views

What features boost security for a home edge router?

I want to hide my home network behind a router and not worry about firewalls on internet-facing devices. Furthermore, one PC is going to be hosting some services, so I guess I need port forwarding as ...
1
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2answers
207 views

Why are Windows computers open to network file access by default?

I'm on a work network, and I had some files I wanted to give to a collegue. I set up a shared folder and directed him to my computer name to open the shared folder. Then I remembered from a long time ...
4
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2answers
470 views

Has there been any documented cases where hackers have hijacked the phone number to a business?

Has there been any cases where hackers have taken over the phone number to a business, by creating a phone number in the same area code, setting up a virtual PBX / Asterisk system, routing all calls ...
1
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1answer
88 views

Indirectly relaying intranet server to outside world

I have an internal network of IP network cameras. The feeds from these cameras are ingested by a single server and presented from a unified web interface both internally and to the outside world (both ...
1
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2answers
133 views

Idea for hiding your mobile phones' location, and still be able to place and receive calls. Any suggestions?

The diagram below is a thought experiment that could provide a certain level of privacy to mobile (smart)phone users, beyond what they currently have. Some of it is purely theoretical, but it should ...
2
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2answers
232 views

Basic Security Knowledge [closed]

Perhaps I am being both naive and overly ambitious in my first post but I have a huge interest in learning about network and system security and am at a loss as to where to begin. I realize that stack ...
-8
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1answer
103 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?
1
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1answer
107 views

Is a seperate server needed for remotely accesing accounting software?

Wishing you all a great 2014. I hope this is the right section. Basically we have a Dell Poweredge R520 server in our office, and we now want to install some accounting software that can be accessed ...
1
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1answer
137 views

Secure chat — is CTCP a good option?

Not sure if this is the proper forum for my question, but I've recently read over at Encrypt Everything that CTCP is a poor choice if you want to keep your chats secure. I'm beginning at security, so ...
0
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1answer
85 views

Spoofing and guest network security

I know a little bit about network security but it's only about enough to know there's a lot I don't know. My requirement is to add a 2nd wifi to my current setup (1 wifi emitted by a ...
1
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3answers
101 views

How to guarantee privacy on files that I store

I want to create an Android app where users from an office (typical use) can upload scanned documents to the app backend service for later use. e.g. A lawyer want to upload a sentence ...
0
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2answers
209 views

What information can be gained from an Email Header?

What information is present in an Email Header that can be used to track a sent mail? For example, are some of these present? Web Browser used? Operating system Type of Network (broadband/dial up)? ...
1
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3answers
169 views

How do i restrict network access to LAN for Visitors

How do i restrict network access to LAN for Visitors In my organization premises any outside visitor comes and connect to LAN ports in meeting rooms.We have seen that they are able to ping internal ...
1
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2answers
119 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 ...
0
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3answers
112 views

If someone has access to VPN and your computer, is there a point of using VPN?

If someone sniffs requests coming from my computer and my VPN's computer, there's no point using VPN, right? Because they can see the time when I made a request to my VPN and they can analyze all of ...
4
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2answers
202 views

Is setting up my own VPN more secure than buying from third party vendors?

When Googling for the most trusted VPN provider (for keeping your anonymity), some users say that the best way to go is to just setup your own (e.g., OpenVPN) using a dedicated server. How is this ...
0
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1answer
75 views

What is the best approach to protect against BYOD? [closed]

I would like to know briefly what are the best practice to protect corporate network from BYOD challenges nowadays? Thanks a lot!
0
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2answers
136 views

Getting detailed information about an infected website

I have a set of bad URL's. I want to know the nature of infections affecting these URL's . Running an online scanner such as VirusTotal gives me some basic information from various engines about the ...
6
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1answer
412 views

Using skype for an attack

I am curious about something; let's say someone randomly added me to Skype and tried to initiate a chat with me and I want to know more about them but I am worried if they can do some damage. My ...
1
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5answers
179 views

“Safe” public WiFi [duplicate]

Is there any danger of any of my computer's files being read or changed (mainly - infected by malware) in the following scenario (I'm using Windows 7): I have file sharing turned off (in "advanced ...
1
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3answers
204 views

Why P2P need portforwarding when behind NAT? [closed]

Correct me if I'm wrong, but for a node to participate in peer-to-peer, if it's behind a NAT, it most port forward to be able to connect. Why is the port forwarding necessary? I know there's ...
1
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2answers
349 views

Is there any solution for block the HTTPS traffic using URL filtering?

The URL filtering can block the HTTP traffic but not the HTTPS traffic in Internet Explorer. For example, the website http://www.facebook.com is blocked by the URL filtering while the ...
0
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1answer
258 views

Netgear WNDR4000 open port 53

Why is port 53 open on the WAN side of the router? And more importantly how do I close it? Port 53 is not one of my forwarded ports. Discovered by doing nmap -pT:1-64 <my-external-IP> -Pn ...
1
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1answer
122 views

Separating Apache and MySQL over Tor for security, performance, and reliability

I'm trying to set up a hidden web service over the Tor network, and I was thinking of making a configuration where my Apache server and my database server are located on different networks. I know ...
2
votes
2answers
146 views

How can I be sure my former employer no longer has access to my computer? [closed]

How can I be sure now that I no longer work for a certain company that they are not accessing my computer from their side. Strange things happen ( someone remove a certain set of my friends on ...
0
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1answer
1k 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
19
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2answers
1k views

Do Simple Linux Servers Really Need a Non-Root User For Security Reasons?

Playing devil's advocate, Let's assume I purchase a Linux server from a hosting provider. I am given a password for the root user and am told I may login using SSH. The only purpose this server has ...
1
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2answers
207 views

arp request to a ghost host

All the clients in my wireless network send continuously arp requests to a host that doesn't exist (I've checked its absence with nmap -PN [IP]). The clients use windows 7 and windows xp (here the ...