The Internet Protocol (IP) is the main protocol for sending packets accross the internet. It belongs to the internet layer in the internet protocol suite with the variants IPv4 and IPv6.

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Surveillance cameras go offline every 30 minutes or so

I'm setting up a 4 camera security system with an Anran Digital Video Recorder (Model NVR6008T), and keep having the cameras go offline approximately every 25-30 minutes. They stay offline for ...
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16 views

IP authetication, usage stats and bad house-keeping [on hold]

If a content publisher using IP authentication stores overlapping or duplicated IP ranges in its access management systems are accesses, clicks, etc. counted multiple times?
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52 views

Why doesn't my IP change on manual router turn off/on? [on hold]

Basically the title. I remember that when still having IPv4 addresses, my IP changed after the router turn off/on. This doesn't seem to be the case with IPv6. Since there are almost 10^40 addresses ...
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2answers
43 views

Can someone Hack my phone personal data using my IP address? [closed]

There is "My wifi router" Installed in one of my office PC's. I once connected my nokia lumia 925 to it. That software "my wifi router" Shows our IP when we get connected. Is there any possibility ...
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1answer
36 views

Windows Firewall: Restricted RDP to 1 IP, but still see login attempts from other IPs

I restricted the Firewall rules for RDP incoming restricting the Scope to 1 Remote IP address (Local IP Address section is empty). This was done for both Public & Private/Domain Rules. I did not ...
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1k views

RDP Attempts From Unknown IPs, How to Protect?

I'm running Windows Server2008 R2, and seeing the following error multiple times with various IPs in the event log: The Terminal Server security layer detected an error in the protocol stream ...
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2answers
57 views

Does a domain name ever leave my local system if the matching IP is defined in my hosts file?

Given the domain website.org and an a corresponding webserver with the IP 1.2.3.4. If a client defines the IP with the domain name in its host file like: $ cat /etc/hosts [...] 1.2.3.4 website....
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2answers
39 views

How do Malware Analysts detect spoofed information?

Although I am fairly new to the industry (3rd internship at a financial institution), I am sure most people have heard and understand the concept of spoofing information, like a sender IP, or MAC ...
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70 views

Best approach to get user's IP

There is two approaches: First approach: if (isset($_SERVER['HTTP_CLIENT_IP'])) $user_ip = $_SERVER['HTTP_CLIENT_IP']; else if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])) $user_ip = $_SERVER['...
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53 views

How can I track IPs to block malicious users?

TL;DR: I want to know should I store both REMOTE-ADDRESS and X-FORWARDED-FOR or either REMOTE-ADDRESS or X-FORWARDED-FOR? Details... Here is a few theories to get user's IP Theory1: If you don't ...
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3answers
58 views

When is IP blocking OSI level 7 only and what is the purpose of doing so on multiple locations?

Let's say there is an application that has IP whitelisting, all other IP's are denied. This check takes place on three different locations: iptables, .htaccess, PHP script. Now in what OSI layers ...
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38 views

Browser change the IP addesses of the POST requests

On my work PC i have web server working on localhost for development purpose, i use vhosts to access the projects - example: mycompany.dev -> 127.0.0.1 In this project there is a protection against ...
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1answer
42 views

Public IP from my UVerse router [closed]

Please keep in mind that I don't know much so use small words and talk slowly when helping me out. At work we have our network set up in the following way: Our internet comes from AT&T U-verse ...
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1answer
213 views

Should I worry about GitHub using IP addresses that are described as having an unknown host?

Today, I got a message while doing a git push, saying Warning: Permanently added the RSA host key for IP address '192.30.253.112' to the list of known hosts. It seems as if it's consistent with ...
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1answer
59 views

How come domain resolves to another IP?

I tried to ping http://crashsafari.com in my CMD: Right there, it resolves http://crashsafari.com to 54.231.48.170 which is http://s3-website-us-east-1.amazonaws.com. But, http://crashsafari.com ...
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2answers
92 views

Trace person from an old Facebook chat? [closed]

I spoke with someone in January in the Facebook chat. The very next day he deleted his account. The only thing I have is my copy of the conversation stored in my account. Is there a way to trace his ...
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1answer
139 views

Why not just blacklist every IP except yours?

Inspired as a continuation of this question: Is it practical to pre-blacklist certain GeoIP regions? Why would it not make sense to blacklist every single IP address that shouldn't have access to a ...
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1answer
111 views

How can all ports be closed? [closed]

I was faced that, there was an hacker attacking my gmail account. With the help of google service, I got the information about that hacker. Again next day he was attacking my pc. When I scanned ...
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3answers
5k views

Is it practical to pre-blacklist certain GeoIP regions?

In recent events, a server I've been managing with has been under a few attacks, a risk you take when hosting a web-server. The firewall has been set up properly to only allow connections through the ...
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24 views

CIPSO & CALIPSO implementation

Trying to understand how to implement security labels into IP packets. There is minimal documentation. Can anyone assist on how one can do this? Do you need raw sockets, or is there an API that UDP ...
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1answer
48 views

Can we send IP request to a user by knowing their mobile number?

i.e request/alert for a user in my contact list with the help of data services of service provider and Is there any chance of getting an acknowledgement from the specified user using the data ...
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45 views

VPN chain in one machine without VM natively

Is it any way to make VPN chain in one machine (MAC or WIN) without VM natively (L2TP/IPsec)? I need this for obtain an extra layer of security. For example - if one VPN turns off I still have ...
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2answers
98 views

IP leakage on Skype through VPN

Does anyone know how the traffic behaves if you configure a VPN natively through SSTP (WIN or MAC)? Because most applications use the TCP, but Skype uses UDP. I try to formulate more specific ...
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1answer
144 views

Is it safe to be showing my WAN and LAN IPs in my email headers?

I don't know how to hide my LAN IP from my email recipients. My LAN IP shows up next to my WAN IP in my outgoing email headers (sent to my other accounts and viewed by me). I have not seen emails sent ...
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2answers
254 views

Kali Linux/Metasploit in VirtualBox - Issue with ports

I've been attempting to get port 4444 to open these past couple of days. I finally figured I'd try to get it working on my Windows machine first and I finally got it. Now, no matter what I do in the ...
206
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15answers
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Tracing the location of a mobile IP from an email

I'm a TV scriptwriter - and not hugely tech-savvy, so please bear with me... If the police have an email, sent by a suspect over a 3G or 4G network, could they use the IP address (since they know ...
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1answer
140 views

ip address hack [closed]

I believe someone knows my IP through accessing public WiFi and accounts such as BT sport. Now I know I'm being monitored but not sure how. I believe this person is a hacker and that they know the ...
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3answers
5k views

How does IP address spoofing on the Internet work? Who can do it?

Someone recently told me that the NSA could impersonate pretty much anyone they want by using IP address spoofing on the Internet. But how would that work and to what extend is it true anyway? Could ...
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1answer
82 views

What prevents ISPs from tracking chain of proxies' (or Tor relays') IP addresses?

I searched all over the internet for the answer for my simple question, but couldn't find anything useful. I already know that police have to access PCs used as proxies or Tor relay nodes to read ...
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3answers
91 views

Security implications of WAF revealing internal IP addresses

What are the security implications of a web app firewall/load balancer revealing internal IPs of the web sites behind it to the outside world? A specific example is with F5 products: They use a ...
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1answer
64 views

Is it a good practice to forbid ip access to port 80?

I see some sites have blocked there port 80 (or 443) to be accessed by IP. When you access by IP, An Nginx forbidden page shows up (with there OS version). My question is does it affect any side of ...
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Does Windows 10 leak information about your IP address?

There are various reports of Windows 10 automatically sending out data when the user opens the start menu. Can that information or other information that Windows 10 automatically sends out to the ...
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37 views

Why is calculating the checksum of an IP Datagram header and then encrypting it not appropriate to provide Data Origin Authentication?

So assuming Alice and Bob have agreed to use a particular symmetric cryptosystem and share an appropriate key, they want to achieve data origin authentication by computing the header checksum of an IP ...
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2answers
58 views

AS number look up [closed]

I have a list of thousands of urls, for each host in these URLs I want to get their AS "Autonomous System" number. What is the best way to do that automatically? I have seen some websites that ...
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1answer
56 views

Multiple users sharing the same IP

I'm setting up a quite unusual proxy for a very specific niche case. I'm allocating (ip,port) addresses to users, from which they can send and receive UDP and TCP packets. e.g. say someone is ...
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4answers
578 views

How to design a home network for IoT devices?

I'm trying to work out how best to design a home network which contains (potentially hostile) devices. I'm running into my limits of networking knowledge! I have two challenges. Unsecure Devices ...
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2answers
313 views

Sophisticated DDOS attack

According to this article, ProtonMail was the victim of a very sophisticated DDOS attack. "At 2pm there was a dramatic escalation," said Yen. According to Yen and Gargula the attackers smacked 15 ...
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1answer
62 views

Can an ip be forced to connect? If so, how is it done, and how can I prevent it? [closed]

Can an IP be forced to receive data from another IP (specifically IPv6 for both)? If so how does this work, and how can I prevent this from happening to me? Does that have any way to be broken? If so ...
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What are the security risks of using public address schemes for the DHCP of your VPN'd Users?

At the company I work for we recently purchased a network scanning tool to help with asset inventory and overall PC network management. My supervisor, while looking at the different IP address ranges ...
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1answer
50 views

Does using the same mail and web server increase a risk of DDos due to IP exposure?

I use the same server for sending my emails and web hosting. I send user registration and support forum mails from my server and occasional marketing mails or newsletters. I read on a CloudFlare blog ...
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4answers
160 views

Is it possible to fake incoming IP?

I would like to whitelist an IP address on my smtp server so that non-authenticated emails on connections originating from that IP could be routed. I control that other IP, so I can make sure that ...
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2answers
110 views

Exposing IP address via img tags

As we all know, many forums allow users to set profile pictures, post images, or put images in signatures. Could a user create an img tag that points to their own site with a link that no one would ...
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1answer
50 views

Can the ip of a SMB file share be traced back to me? [closed]

The question is pretty much self explanitory
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1answer
500 views

T-Mobile WWAN IP address is DoD Network Information Center? [closed]

I wrote an app that grabs the IP address of my Wifi as well as the WWAN i.e. the data part of my Tmobile plan. I have an iPhone. Here is what my app prints. I use pretty standard code to obtain the ...
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30 views

Moving Target Defense implementation in context of SDN

I need to demonstrate MTD for a project in context of SDN by writing logic for the SDN controller. The logic could be as simple as creating a new Virtual IP every n seconds. However, i would like some ...
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2answers
95 views

public databases of IP addresses which are involved in illegal/gray-area activities

I just received a /24 IPv4 network from my ISP. This very same /24 network was previously used by some hosting provider and if I made a quick scan of those 256 IPv4 addresses agains some DNSBL ...
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1answer
69 views

Is it possible to Use someone public IP? [closed]

I am quite aware of the networking. But I have a confusion which I am searching over internet but did not come to any solution. Can we assign any specific IP to our PC or any device. Like I want to ...
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2answers
113 views

Why did I get a wrong IP and certificate for www.facebook.com just now? [closed]

I just navigated to www.facebook.com and my browser alerted me that an invalid certificate has been received. I checked the cert in question, and I was surprised to see that the Common Name on it was ...
6
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2answers
144 views

Malicious user inflicting XSS attacks appears to be on my own network

I have a live Django project where I'm using nginx as a reverse proxy with gunicorn as the application server. It's a fairly new project and isn't SSL enabled yet. There's a user on this project who's ...
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1answer
195 views

How restrict is an Asp .Net Web App with ipSecurity enabled?

The IT department of my company refused to host an ASP .Net Web App on our intranet. For security reasons that would be the best solution. Right now I'm considering other options. One of those is to ...