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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Mystery IP address Hijack

I'm working on a customer's new website. To get things up and running quickly, we're maintaining his domain name service and hosting the website on another server. Customer bought the URL name years ...
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2answers
45 views

What IP address is a new email account associated with? [on hold]

If records are subpoenaed from google will they reveal internal IP or external IP addresses of a email account? For example if an email address is made and an email is sent using and iPad and home ...
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456 views

Can an attacker “simulate” a private IP address?

I have a SSH server with a rule that does not allow password connections outside the local network. So people already on the local network, either physically or via VPN, are allowed to connect with ...
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1answer
26 views

Ghost CMS abnormal access

I have a blog hosted with Ghost CMS. I created a new blog post (say "My New Blog") and correspondingly there was a url generated (mysite.com/mynewblog/) The weird part is that I saw an access to this ...
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20 views

Migration from TDM to All IP: any security issues?

My phone operator is slowly abandoning TDM (Time Division Multiplexing) to replace it with IP connections. What are the security risked related to this change? will all the phone line be like in a big ...
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1answer
29 views

How to handle a remote office and a client requiring IP Whitelisting?

.NET Developer here, out of my comfort zone on this one. My software company is going remote, where employees can work from home, Starbucks, a Regus office, Spain, anywhere really. One of our ...
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62 views

Is this a security flaw in tor? [duplicate]

I realize this question more belongs on the tor exchange (and i have indeed posted it there) so if you want to vote to close this question I completely understand. But I have noticed that this site it ...
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1answer
28 views

Risky Connection Blocked by McAfee

McAfee has been blocking a connection from a certain IP address (I found the IP Adress to be from Hong Kong). Should I be concerned? McAfee says the program is "SYSTEM". Also if I should be concerned ...
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1answer
47 views

Double/Chained VPN - Which IP will be vissible to the VPN providers?

I am currently using a company VPN and use Juniper Network Connect on OS X to connect to this network. I'm interested in using another VPN and set this up at my internet router at home, so all ...
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1answer
34 views

What are the risks associated with relying on Mutual SSL & IP Filtering?

We are thinking of implementing Mutual SSL combined with IP Filtering because we are unable to setup a vpn within our external client. What are the risks associated with using Mutual SSL combined with ...
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2answers
70 views

Faking IP address without being aware of returning response

I read different articles on the subject (Spoofing IP address), someone said: Spoofing an IP is usually better suited to "fire-an-forget" scenarios like DDoS. due to TCP two-way communication ...
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38 views

Does GRE Tunneling “really” hide your main IP?

As we all know, setting up a GRE Tunnel is nice to hide your main ip under a dedicated server. My question is, is it really hidden? Is there a way a malicious user could somehow find your main ip ...
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Is the method of hardening the creation of a Cryptographically Generated Address (CGA) called hash extension

CGAs are sha1 hashes truncated to a 59 bit value. Along with a 3 bit security parameter they form a IPv6 address (more precisely the interface identifier). from wikipedia: The Sec parameter ...
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44 views

Security implications of static IP? [duplicate]

I need a static IP for a remote shutdown utility with my phone. What are the security implications of setting IP to static? I feel the "attacker knows your IP won't change" argument may be a ...
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1answer
45 views

Does firewall count as a subnetwork? [closed]

I need to design a network based on IP 10.1.1.0/24. I have three different subnetworks and a firewall. Does firewall count as a subnetwork? Do I need to assign some IP values to it?
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4k views

Is someone able to hack my Facebook account knowing my Dynamic IP, PPPoE and mask?

I was using Facebook today and, after replying politely to someone about how stupid his comment on something was, Mr. John Doe, who I never met before, sent me this message: You wanna get hacked, ...
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0answers
60 views

How does detecting promiscuous mode using an ARP test work?

I have read that we can detect whether a system is running promiscuous mode by sending out an ARP request with a fake broadcast address e.g FF:FF:FF:FF:FF:FE.This will be blocked by all NIC's ...
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16 views

Elicit the IP of a black box [migrated]

Suppose an attacker connects their computer with an Ethernet cable to a black box computer, which supports both TCP and UDP, over IPv4, over Ethernet. Direct connection, no switches in the loop. The ...
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53 views

MITM sniffing packets

I fail to understand how a MITM attack sniffs packets and modifies them.In the case of ARP spoofing although the attacker has spoofed the MAC address of a host, how does he modify it as the IP layer ...
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180 views

What is the importance of an ISP maintaining IP-Assignment logs?

I was reading an article which explained that there is a growing movement to force ISP's to store IP-assignment logs for DHCP connections for longer periods of time in order to fight cyber-crime. ...
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3answers
50 views

Utility to build IP exclusion list? [closed]

Are there any utilities out there that can assist in building an IP exclusion list? Scenario: Recently suffered a brute force attack where 50000 failed login attempts came from a multitude of ...
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2answers
90 views

Is it safe to publish some internal IP of my company?

Sometimes when asking networking questions on StackExchange I want to publish some output where several internal IP adresses from my company appear (output of traceroute command for example). Since I ...
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2answers
90 views

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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4answers
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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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3answers
174 views

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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41 views

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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114 views

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
59 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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136 views

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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75 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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1answer
90 views

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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1answer
286 views

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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60 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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391 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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80 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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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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164 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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257 views

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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4answers
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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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2answers
206 views

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
150 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
146 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
3k views

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 ...
7
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1answer
239 views

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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186 views

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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80 views

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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2answers
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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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171 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 ...