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.

learn more… | top users | synonyms

0
votes
1answer
58 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 ...
-3
votes
0answers
18 views

Are Bouncers just for IRC? [migrated]

I got to know of a new type of software that allows you to hide your IP address. A Bouncer Now are bouncers just for the IRC network or can I channel all my internet traffic through it ? If so ...
-2
votes
2answers
85 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 ...
-3
votes
1answer
133 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 ...
0
votes
1answer
107 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 ...
26
votes
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 ...
0
votes
0answers
22 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 ...
0
votes
1answer
46 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 ...
1
vote
0answers
40 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 ...
0
votes
2answers
84 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 ...
0
votes
1answer
142 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 ...
1
vote
2answers
203 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
votes
15answers
10k views

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 ...
-9
votes
1answer
126 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 ...
30
votes
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 ...
0
votes
1answer
61 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 ...
3
votes
2answers
81 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 ...
2
votes
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 ...
7
votes
7answers
750 views

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 ...
0
votes
1answer
35 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 ...
1
vote
2answers
56 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 ...
1
vote
1answer
39 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 ...
9
votes
4answers
381 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 ...
9
votes
2answers
308 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 ...
-6
votes
1answer
60 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 ...
2
votes
0answers
29 views

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 ...
3
votes
1answer
48 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 ...
2
votes
4answers
138 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 ...
4
votes
2answers
104 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 ...
-5
votes
1answer
50 views

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

The question is pretty much self explanitory
2
votes
1answer
364 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 ...
1
vote
0answers
25 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 ...
1
vote
2answers
88 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 ...
-4
votes
1answer
65 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 ...
1
vote
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
votes
2answers
142 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 ...
0
votes
1answer
155 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 ...
6
votes
4answers
531 views

How to identify a company's public network address range?

Which tools or websites can I use to identify a company's public network address range(s)?
1
vote
1answer
88 views

How does add-on for the Firefox with a custom proxy server prevents info from Google?

I would like to know how does add-on for the Firefox web browser with a custom proxy server prevent Google from collecting information about your browsing? Does it prevent also from your internet ...
-5
votes
1answer
126 views

The problem I have with wikipedia showing IP addresses to the world? [closed]

I went on wikipedia, then went to the edit history of an articles I edited. To my surprise, my IP address, along with other people's IP addresses are on the articles edit history page. Why would ...
37
votes
10answers
12k views

While working from home, is it a bad idea to give the company you work for your IP address?

I work from home. Why would a company I am about to do some work for ask for my IP address? What would they need it for? Should I be worried? Thanks
2
votes
1answer
143 views

Linux responds to ARP requests for other interfaces - could this be a security vulnerability?

Linux responds to ARP requests on all interfaces by default. To explain, say you have this setup: Client 1 ---> [eth1] server [eth0] <--- Client 2 And the server's eth1 IP is 192.168.1.1 and ...
1
vote
3answers
319 views

How can I find an unauthorized/unknown proxy on my home network?

I recently started receiving an error while trying to stream netflix that I'm using a proxy. Exactly this error code here: https://help.netflix.com/en/node/277?ba=GSButtonClick&q= My problem is ...
1
vote
1answer
43 views

IPSec Host-to-Host VPN (RedHat) needs IP Forwarding?

We would like to build a Host-to-Host IPSec VPN (both RedHat Linux). Is it really mandatory to activate IP Forwarding, which is by default deactivated because of our security policy (/etc/sysctl.conf ...
1
vote
3answers
299 views

How to (further) ensure SSH security?

I set up my Linux Ubuntu machine as an SSH server through no-ip.com and it works great. Recently I discovered the command, sudo lastb -ad -F -w which outputs a log of the most recent failed SSH ...
0
votes
2answers
161 views

Beginner > Medium > Advanced Books/Guides/Tutorials on TCP/IP [closed]

Long time web developer looking to get into infosec. Was hoping on guidance on material from a beginners stance on TCP/IP and hopefully "networks". I realise the massive generalisation I'm making but ...
3
votes
1answer
76 views

What other attacks can be deployed using IP spoofing other than DoS(and DDoS) attacks ?

I want to know the other attacks which are associated with IP spoofing because, we're trying to implement Source Address Validation (SAVA) and wanted to where else can Source Address validation ...
-3
votes
1answer
81 views

IP Address Is A Guid-Like String [closed]

When I get my IP address from Google, in most cases, it's a number like NNN.NNN.NNN.NNN (sometimes fewer than 3 Ns). It always is in that format. I noticed on this new wifi that my IP address is a ...
12
votes
2answers
254 views

How was The Pirate Bay datacenter kept hidden?

How were The Pirate Bay's servers kept hidden for so long? You would think that it would be easy finding the servers that so many DNS servers are pointing to. Tracing the chain to the main datacenter ...
5
votes
2answers
443 views

Port forwarding with 0.0.0.0, any threat?

I set up on our company's firewall (fortigate100d) a port forwarding to one of our Internal services. As we don't have a static public IP I used 0.0.0.0 as an external IP so the remote users can ...