The IP (internet protocol) is a protocol for transmitting data over packets ("datagrams"). It is the primary protocol of the Internet. "IP" may also refer to an IP address, the numerical address assigned to an IP-capable device.

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3answers
53 views

What are the best Subnet IDs for maximum number of hosts?

I need help with this problem. I know it must be either A or D since subnet mask 255.255.255.224 has the most amount of hosts. I'm confused on subnet IDs could anyone clarify why subnet ID 224 would ...
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2answers
42 views

47 networks on class b ip address to provide the maximum number of nodes per network? [closed]

Haven't been able to solve this question this entire day. Which network is the best and why?!? You are the network administrator for a new call center management company. The firm has 47 offices in ...
0
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0answers
32 views

Running peer block lowers the CPU usage - Am I being hacked?

Why is it when I start peer block my CPU usage goes down 20%? I've been using peer block not because IO'm file sharing but because I just want to better secure my computer. I use its default p2p ...
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1answer
50 views

3 computers - 3 networks - 1 IP ADRESS possible? [closed]

So here's the thing. There is a certain website that me and a few other friends would like to use with the same account. The problem is that this website allows only one user to use it. So that means ...
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1answer
45 views

Can two users have same public IP?

I want to detect unique user for my site. For this purpose I plan to use user's 1. Public IP and 2.Cookie But user can clear cookie(or even may not have enabled cookie). Then IP address will be ...
0
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0answers
24 views

Find/change noname IP camera IP address

Is there some way to find the current IP address of an IP camera, with it connected to the PC by the ethernet port? Couldn't find any information about this specific model online, and the camera is so ...
0
votes
0answers
78 views

Bridging Wi-fI Network to Raspberry Pi Zero over Ethernet, need to find IP address of Pi

I have used Windows 10's bridged networking feature to allow my Raspberry Pi Zero to connect to my home wi-fi via an Ethernet connection to my laptop. I am able to find the Zero's local IP address ...
0
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2answers
32 views

What is the correct formula for calculating the number of subnets or hosts you can create with a given number of bits represented by x?

I'm pretty sure it is 2x-2 but want to make sure I am correct. Anyone have a say and why? x2 + 2 2x + 2 2x – 2 x2 – 2
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1answer
68 views

DD-WRT Force New WAN IP Address

Is there a way to force a new WAN IP Address with DD-WRT? I know there was a way before that would require temporarily setting a new Local IP or Modifying the WAN but I do not remember.
0
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1answer
43 views

Why does Google use the IP address of local DNS servers to locate me?

Assuming that Google can figure out where a machine (with its given IP address) is roughly located, why doesn't Google use the IP address of a machine versus using the IP address of a local DNS server ...
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1answer
53 views

My Public IP address

So I found out I can easily get my Public IP address from my work. I can ping it i can even log in to my router from work. How do i defend myself from this? what are ways someone can get into my home ...
0
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1answer
27 views

DOS attacks using cmd and protection against them

After finding someones ip you can easily send pings to them to make DOS attacks. Me and my friend tried to make a defense against them and wanted to know how a low level attacker can send this DOS ...
0
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0answers
24 views

Facebook URL timeout but ip works

This is a really weird case I came across and I was wondering if somebody could explain to me how and why this happened. Suddenly last night Facebook stopped being accessible. When I tried to access ...
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votes
1answer
49 views

1 WAN ways to switch between different routers to change IP address

I have 1 ethernet cable from my ISP, when I plug that cable to a different router and the IP address will be changed (IP wont change when I re-plug into the same router). So now I have bought lots of ...
0
votes
2answers
26 views

SMTP Inbound and Outbound Proxy, does it or even the concept exist?

I am a developer, and have a home lab. On it, I have a fully functional exchange server, and I would like to build apps where I can test its integration. A long story short, I am unable to send or ...
0
votes
2answers
25 views

Understanding the RFC1918 IP address range

Short version, what does it exactly mean, 192.168.1.0/24, or 192.168.0.0/16? Long version, I want to restrict my Squid server's Web Access By IP Address, and the article shows two ways, acl ...
0
votes
1answer
79 views

What is the exact use of a limited broadcast address?

I read that limited broadcast addresses will be dropped by the router. So, it's not used in the layer-3 (Network layer), where IP addresses are meant to be used. So, where exactly is it used?
0
votes
1answer
34 views

Finding public ip when using VPN

I am using Sercuritykiss VPN in Kali linux by adding a new VPN and connecting to it. They are providing a Gateway which is the address of the server and i use server in France and it has an ip ...
0
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0answers
131 views

Different IP for each tab Firefox

I know there are some extensions that allow us to have different sessions in the same Browser, however they all are connected through the same IP address, I need to know if there is a way to change ...
0
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2answers
68 views

can anyone explain this completely random local IP address that appears on my network?

I have a DD-WRT router, and I am connected to a VPN. My routers local IP is 192.168.11.1. The VPN uses local address 10.10.0.6. However there is this strange IP address 10.16.128.1 that is always ...
4
votes
1answer
22 views

Batch file - splitting a default gate way in to it's component parts, adding a number then reconstituting

Basically, what I need to do is get the default gateway of a Win7 machine which I have accomplished with the below code: @echo off for /f "skip=1 delims={}, " %%A in ('wmic nicconfig get ...
3
votes
3answers
377 views

different IP's from ipconfig and whatismyipaddress.com

When I type in ipconfig in the Command Prompt, I'm getting 192.168.x.x as my IPv4, and if I go to a site like whatismyipaddress.com, im getting something with 80.50.x.x Why am I getting two different ...
0
votes
1answer
80 views

Raspberry Pi Keeps old IP and adds new static IP

Here is my /etc/network/interfaces: source-directory /etc/network/interfaces.d auto lo iface lo inet loopback iface eth0 inet manual auto wlan0 allow-hotplug wlan0 iface wlan0 inet static address ...
0
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0answers
137 views

OS X El Capitan can’t find network share

got a little problem with my OS X El Capitan Mac Mini Server. There are a few users in the network with a statical IP range vom xxx.xxx.xx.1–255 and you can access those clients via terminal or the ...
0
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1answer
27 views

How is an all 1's Broadcast in CIDR handled?

I'm confused how CIDR broadcasts work when using the all 1's address (255.255.255.255). From my early (Classful networking days), I recall that ping 255.255.255.255 from a machine on a Classful ...
0
votes
1answer
22 views

Capture only UDP traffic that cannot be identified as another protocol

I have applied the udp filter in order to just capture UDP traffic, as described in Wireshark Wiki: Show only the UDP based traffic: udp However, this does not only show UDP traffic. It shows ...
5
votes
6answers
546 views

Command to find network interface for IP

With ipconfig I can show the list of network adapters and their settings, e.g. the IP address. I'm looking for a reverse command that displays the name of the network adapter for a given IP address. ...
0
votes
1answer
40 views

IP Address last octed with “_” character

I have an IP address of 192.xxx.xx.208_3 the last octet has an _3 what does this mean? It is a printer that I cannot ping. I want to add it to other computers but it does not list as a selectable ...
0
votes
2answers
88 views

Find out all IP addresses of all Computers on Network

I want to list all IP addresses with their Computer's names (if my IP was 197.577.52.4: 197.577.52.4 - Luca's MacBook) through Mac Terminal or Mac Software. I tried many terminal commands, but it ...
2
votes
1answer
28 views

Setup DNS for my server which is using static IP that can be access from anywhere on the internet

I have setup a static IP from my internet provider so that any one on the internet can access content on my server. I want to setup domain's to redirect to my server and load web site from my server ...
0
votes
1answer
30 views

Ubuntu Network configuration setting and Windows

Suppose I have connected to a Network having Static IP after that connected to a Network having DHCP, When I go back to previos network having static one I find lost my setting (IPV4). Probably ...
1
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0answers
13 views

DNS zone files with more than one name pointing to the same IP

I have set up a local DNS and the forward zone file looks like this: $TTL 86400 @ IN SOA ns0.mylocal.loc. root.mylocal.loc. ( 2011071001 ;Serial 3600 ;Refresh 1800 ...
0
votes
1answer
29 views

Assigned static ip address doesn't retain

I changed my computer's dynamic ip address to static, but after reboot when I opened local area connection properties, then I saw IP address and subnet mask values have become empty. Then just to ...
1
vote
4answers
65 views

Subnetting, Switches, and Routers

I am new at this and want to figure out why my configurations are not working. I have two subnets each connected by a level 2 switch. I have changed my subnets to the following: Subnet 1 has 62 hosts ...
0
votes
2answers
118 views

How to find subnet mask only knowing the usable address

I'm studying for certification and during a simulation I stumbled in question that made me realize I wasn't so sure about calculating IPs and masks stuff. There it is: A company has a forest with 4 ...
1
vote
2answers
40 views

IPv4 changes by itself

My IPv4 address randomly changes by itself but I can't figure out why ? It changes from 192.168.0.10 to 192.168.0.13 and vice versa. That happens doesn't happen often but very randomly... Does ...
0
votes
1answer
53 views

connect to two networks simultaneously via single ethernet port?

Is it possible to create multiple connections with same port? Is it possible to connect through them simultaneously/combine them? P.S: I am on windows 10
2
votes
1answer
123 views

Linux netstat shows ipv4 mapped ipv6 address

Even after disabling ipv6 on my linux machine and restarting network services, and not having an ipv6 address assigned to an interface, one of my daemon (cassandra to be specific)is using an ipv4 ...
0
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0answers
28 views

How can I process traffic between 2 instances of NetCat?

I have an utility that make some data transformation between stdin and stdout in both directions (encode / decode), and I want to make a some kind of bi-directional proxy using two nc instances and ...
5
votes
1answer
768 views

What happens when we change Subnet mask of Private IP address

first of all, I know that private IP ranges are 192.168.0.0 - 192.168.255.255 (65,536 IP addresses) 172.16.0.0 - 172.31.255.255 (1,048,576 IP addresses) 10.0.0.0 - 10.255.255.255 (16,777,216 IP ...
0
votes
0answers
16 views

How to link Ip addresses when only using two for DNS servers and then the other three for SSL?

I have five IP addresses for the short term. I was wondering what would be the best set up for NAT on these servers. I will have a total of seven servers at my house. The IP addresses need to be split ...
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votes
4answers
207 views

Work Network Admin refuses to give me a 2nd IP address so I have to add extra router [closed]

At work I am given only a single IP address (198.168.10.106) to be used on a single computer on the network. Problem is that I want to use 2 computers at my office and share the only single given IP ...
0
votes
1answer
75 views

How does Starbucks wifi / etc “hijack” your internet connection?

I don't have a strong knowledge of DNS, but I do have a little bit, like I've done apropos dns and flicked through some of the mentioned man pages. When I sign onto what I'll call "corporate-free" ...
1
vote
2answers
98 views

How do computers on the internet locate each other using IP addresses?

Given an IP address, how do ISPs know how to find the node assigned that IP? Is there a central server, or several distributed servers, somewhere that hold information on all allocated IPs? After ...
1
vote
1answer
48 views

Difference between 127.0.0.1 and 0.0.0.0 in the context of the Firefox address bar

I need to configure a firefox extension to load a page that can never exist. It should be as fast as possible. The obvious choice is about:blank, but the catch is that the API used by the extension ...
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votes
1answer
43 views

Understanding Ports

Total laymen trying to get a grasp on my home network. I have noticed that my sons laptop is consistently running with port 445 "SMB directly over IP" and was wondering if someone could tell me if ...
0
votes
1answer
74 views

IP address from LAN side of client router appears in NAT table of primary router

I’m seeing what appears to be strange activity on my Primary router (the only router connected to the ISP modem) from one Android device. It could be that I’ve never seen it before as the day is ...
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votes
1answer
38 views

Change name and address of Local IP address

I'm now starting to build a simple webserver in Python and I'm wondering how the IP addresses work. On my computer I stated in my network center a specific static IP address and this address works ...
0
votes
0answers
27 views

Can't forward real static ip to virtual machine's local ip

I have installed Windows Server 2012 and IIS to virtual machine(NAT connection). I want to publish a web site with my static ip adress. I have a web site to publish and everything is working. My real ...
0
votes
1answer
35 views

Inter-network communications

I have an internet connection at my residence through my cable provider. Obviously it hooks into my cable modem which them hooks into my router where the signal is switched to the wireless access ...