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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Rationale behind hiding originating IP address in emails?

Gmail has been hiding originating IP addresses for quite some time now. Hotmail and Yahoo have started doing this too. Apart from obvious privacy implications of revealing the sender's IP address, is ...
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How can I stop an IP from trying to use my mail server?

I have recently set up my first email server, and I look at the logs in /var/logs/mail.log to see what is happening, I notice this one IP does this multiple times every day for the last so many weeks ...
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How to hack into a remote mysql database?

(Moved from Stack Overflow as other users said it was a security question) I have a mysql database sitting on a remote server. Nothing else, ie no web site using it, no server side scripts etc, ...
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Security benefits to have IP-filter in HttpModule instead of Page-Load in asp.net pipeline?

I'm working on implementing an IP-filter which blocks all requests by machines outside our IP-range. This is for an asp.net project (written in c#). I've read on multiple forums that the safest way ...
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I have been accused of sending porn to my fiance's ex [closed]

I have not, but she says that she has my IP addres, which I know can be spoofed and also can be found out by my email header. What can I do to combat this liar? I have a hotmail account and she has a ...
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1answer
51 views

How to fully mask my computer without using tor? [closed]

I want to mask myself and therefore I configured a proxy server. I use debian and squid 2.7. It actually works fine, however, I visited the site whatismyip.com and I can still see that I'm accessing ...
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Do search engines give searcher's IP address to sites that come up in search? [closed]

Ok so for example, I search "stackexchange" and a bunch of pages come up in the search result - of course most of them from this very site, and many other ones talking about stackexchange. Would this ...
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63 views

How to get directly to text versions of Google cached pages [closed]

http://navigators.com/cached.html According to the bottom of that site, it seems the easiest way to view websites without giving them your IP is: "Edit the heck out" of google URLs like this: ...
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IP over HTTP GET only

Consider the following scenario: There is a client behind a really strict firewall. There is nearly nothing available to 'connect to the internet'. Just DNS resolution and HTTP/HTTPS (some whitelisted ...
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IP address, iphone, Snapchat

My child is being accused of doing some improper things via Snapchat, but he swears that he did not do anything, and he is the type of person who probably would not. The only thing the police are ...
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51 views

ARP poisoning question

I'm writing a program that detects ARP poiosoning. My question is: How can I b sure my LAN hasn't been poisoned? Yes, I can use my settings and find the IP address of the default gateway and yes I ...
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46 views

NMAP Scan- Results Differ

I'm trying to determine a servers IP address via ping and open ports/services by running an NMAP scan. At work, when I ping my website/server, I get a response from 172.16.XX.X If I run an NMAP scan, ...
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212 views

How can I spoof source ip address while making a ping request from windows command prompt? [closed]

I am using ping command to test my website which is running on a local server at the moment.
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64 views

State Government website find an IP address?

I had someone use my email address and sign up on a State Government website and register as me. Made a complaint and the autoresponder of the .gov site replied to the email that I allegedly sent. ...
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1answer
49 views

Making a Judgement on a User's IP Usage

We have a click exchange-type web application that allows users to receive stats boosts within a game. Stats boosts are based off unique IP addresses which poses a problem for users who use proxies or ...
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1answer
124 views

Does Google hand over captcha IPs to webmasters?

Google gets to know a user's IP when someone enters a captcha even if they are using tor (see http://www.wired.com/2014/12/google-one-click-recaptcha/). So, If I go to a non-google website, such as ...
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Prevent location being exposed through VPN

I use the Astrill VPN service to access websites that my country has blocked. There is nothing sinister going on here. Sites like google and youtube have all been blocked. This VPN service offers ...
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171 views

Is blacklisting IP addresses a waste of time?

After months of logging, I have collated a list of rogue IP addresses trying to perform SSH brute-force logins, send SPAM, hack Wordpress admin logins, upload spammy links, etc: SSH logins SRC ...
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Using anonymous email as official email

Assuming I have created an email in hushmail through of tor, and if I use it as my official email in a site such as Github. Will it throw my anonymity away as I use github from a regular browser?
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Is there any reason to include the remote ip when using reCaptcha?

I am implementing Google's reCaptcha in my app. According to the documentation, my API request must include my secret key and the response, and optionally the user's remote ip. For what reasons would ...
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4answers
117 views

Is it safe to set up IP address to domain name redirection?

We recieved the following e-mail with from one of the UI developers When we browser site with IP: http://x.x.x.x/, it doesn’t redirect to http://www.our_website_name.com. This could cause ...
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1answer
136 views

Why does my web server receive so many TCP resets from some clients?

I run a web server and log connections that are dropped. Occasionally, I get a burst of TCP RST packets from some of my clients, like this: Feb 11 11:56:29 SRC=1.2.3.4 TTL=57 SPT=38383 DPT=80 ...
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5answers
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How to uniquely identify users with the same external IP address?

I have created a login module on my website. I was able to deal with simple brute force attacks since I can identify the user based on username/email and throttle their login based on failed login ...
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Are these SSH passwords of hacked servers?

I have been seeing persistent SSH connection attempts on my computer from a familiar IP address. I got curious and decided to do some Googling on the IP address. Turns out that someone from Indonesia ...
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How to retrieve the MAC address of a remote IP [closed]

I have an IP address, and I want to find the corresponding MAC address. The IP address is in the same city, so we're connecting to the same network. How do I find the corresponding MAC address?
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How to learn IP range from inside company

I'd like to block all users from inside Company X from visiting my website. However I don't work at Company X. Is there an efficient way to learn what the IP is when people inside Company X access the ...
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Security of HTTP proxies

If POST requests are being made to a website via a browser using an HTTP proxy from sslproxies.org, is it possible to trace the origin of those AJAX requests without having access to the proxy being ...
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135 views

Someone or something tried to login to my Gmail using IP address of my shared hosting

My Gmail told me someone tried to login with the correct password. But Gmail blocked it because the IP address used is different from my IP address. When I looked up the IP address that tried to login ...
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1answer
63 views

How safe are networking ACLs based on IP-address?

As far as I know, a determined attacker would have no major issues in hacking the IP address of the packets contained by his (web) request. Therefore, I cannot see how an Access Control List (such as ...
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Is it bad to have cameras using a static IP address?

I am about to move in a new house, and I would like to install some security cameras. The contractor told me that in order for me to check the videos recorded by the cameras in real time when I am ...
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6answers
5k views

An attacker has my IP address;So what? [duplicate]

There seems to be a general bad vibe for someone having your IP address, but what are the real dangers? After all, I give my IP every time I connect to a website, regardless of the legitimacy of said ...
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Does it add anything to restrict IP address?

I have an https website that is protected by a login form (username + password). Does it add anything, protection wise, if I put this website behind a firewall that only allow certain IP address?
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If you send a bitcoin payment to a seller, will they learn your IP address?

Since you send bitcoin payments through one of the Bitcoin clients, I assume it announces the payment to the network, so each computer it connects to in order to do so would know the IP address from ...
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Am I exposing my application to IP address forgery / ip spoofing?

Here is my setup: I will create two REST services that are run on Server B and should only be called from Server A. Both servers are on the same network and I am not able to configure a firewall to ...
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1answer
96 views

How do shared IP addresses work and do they give privacy?

I assume "shared IP addresses" work by NAT, because obviously two devices with the same IP address need someway to distinguish them. I've seen some privacy advocates boast they have "shared IP ...
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Is a SSL CA signed certificate necessary when connecting with IP Address?

I'm currently creating a socket server, and would like to encrypt communications. The thing is, the client will connect directly to the ip without any DNS. (Every user will know the Server's IP ...
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Would a VPN with changing configs do the same job as different VMs

I was reading this question. So my question: Would using a VPN and swapping out configuration files that change your IP address mask the same as using different VMs?
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Connecting to postgres with SSL

I need help understanding some basics about the postgres database server and SSL. I am developing a Windows desktop application that will connect to a postgres database, in single user mode, with both ...
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“What's my IP” shows a different result when running over https than over http [closed]

We had issues with one internet provider, and switched to another one. However, we received word that the new internet provider is somewhat affiliated with the previous. When running a "what's my ip" ...
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How can I block certain IP addresses from my router?

I have done some basic things protect my router like disabling wps setting strong passwords and stuff. However, I am using a virgin media superhub 2 where it does not seem to be possible to ssh into ...
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Do I have to hash users' IP addresses when I log them?

I have read a lot of users saying that you have to hash IP addresses - and a lot of others who say I don't have to because it is not private information. I use IP addresses for identifying users, ...
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346 views

Reporting an IP address

This morning while checking /var/log/secure to troubleshoot an issue with my Centos VPS, I found that there has been too many SSH bruteforce attempts from 54.93.174.60 for the past couple of days. I ...
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Is it possible that authorities can't block a certain website

I was watching a very recent TV show, the FBI agent told the police that there is no way for anybody to block a live stream of a pedophile torturing a kid nor to trace it. Even when it's being ...
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350 views

Masking IP address and port number for Web application [closed]

I have a Web application running on port 89 ( non-standard port) of a Windows 2012 R2 machine. The login page for this application needs to be accessible through a link on my website - let's call it ...
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Differences between using Tor browser and VPN

I can't quite figure out the differences between using the Tor browser and using a VPN (like concretely proXPN). From what I understand the idea is the same, that they both hide the IP address. The ...
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1answer
44 views

How to restore devices like IP phones to productive use after unexplained activity? [closed]

I'm trying to consider how to properly vet devices that have exhibited unexplained activity for future deployment. Let's just consider my current scenario as an example, but I am interested in this ...
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Facebook security

I check my security settings (from my Facebook acc.) from time to time, and sometimes I see there are IP addresses which logged into my account but don't belong to me. When I look in the web who is ...
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Is it safe to use IP Addresses as an identity?

I have a website where users can generate links. I'd like to limit 10 links to a user, but would also like to avoid requiring a login/email. I was thinking about using the IP Address as an identity ...
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Impossible to make connections through closed ports?

If you have closed all your ports on your internet protocol, you cannot make a connection to that internet protocol. So how do attackers (DoS or any other means that need a connection) make a ...
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Computer's IP address used by another in closed network?

I got an alert in the newest OSX (newest Macbook Air) and in Eduroam network that my IP address is used by another machine. This is my first time in life. I think I may have been attacked because I ...