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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How to Identify Class A, B and C IP addresses that look similar?

The question I had come up on my CompTIA test was Which of the following is a private Class B IP address? The choices were A 10.0.15.1, B 172.16.0.1, C 172.16.1.1, D 192.168.1.1 We know that within ...
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Ubuntu server as DHCP server for dual stack

I currently have an Ubuntu server on VirtualBox set up to give hosts on my GNS3 topology IPv4 addresses, and it is working without issues. However, I would like to have that same DHCP server give out ...
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4answers
76 views

What is the diference between IP subnet mask 255.255.254 .0 … or 255.255.255.0? [on hold]

What is the diference between IP subnet mask 255.255.254.0 and 255.255.255.0?
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52 views

Router IP address

I have a wifi router which connects to the internet. The local IP of this router (router A) is 192.168.0.1 Few years ago, I had connected another router (Router B) to router A via an ethernet cable ...
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1answer
29 views

Connecting two home routers and change to IP addresses

Netgear Cable Modem Router Connected to Internet IP 192.168.0.1 DHCP is ON D-Link Router This is my wireless router IP 192.168.100.0 DHCO is OFF I want to use the D-Link router as my primary router ...
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15 views

Can VPN IPs be learned?

So everyone is talking about this PIA thing. They say they have 200 servers in 18 countries, and I was wondering could the IPs of these servers be obtained by ...let's say the Chinese government? Do ...
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112 views

Agar.io, play with friend from same address [migrated]

Let's say that i am at a friend's house. It's possible to play agar.io together, at same IP? Thanks !
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0answers
40 views

How to dynamically change IP address repeatedly?

I'm working on a spam detection engine (early stages). I've deployed my spam detection engine on a web server and to test it I need to access the remote resource repeatedly with different client IP ...
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2answers
50 views

Static IPs through router

Don't know of it's even possible, or if it's the right place but here it goes. Facts: I have a router (on lease, can get something else if need be), TL-WR740N. My ISP gives me 3 external/global IPs ...
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3answers
52 views

Leading zeros in IPv4 address; is that a no-no by convention or standard?

I teach a class on a software product my company makes and I find that students frequently add leading zeros to a configuration page to have the software connect to our hardware. Leading zeros are ...
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1answer
29 views

How to block all IP addresses in a range?

In nginx, I know that to block all IPs in the range 5.121.66.xxx, one can use this directive: deny 5.121.66.0/24; Now, I'd like to know how a range like 5.121.yyy.xxx (where yyy in 1-255) can be ...
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1answer
27 views

Does DNS lookup change depending on the part of the site being requested?

DNS requests to different subdomains can be different. For example, example.com and subdomain.example.com can return different IP addresses. Does this logic extend to the parts of the domain after ...
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1answer
39 views

Loading a website using IP

As per my understanding DNS is used for resolving domain names into IP addresses. I am using Ubuntu. I did following. nslookup facebook.com gave me the IP of the website. I blocked DNS using firewall. ...
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0answers
24 views

Different IP for host and VM [duplicate]

When we practice , let's say Metasploit we need another IP address to test onto . So for practice i need another IP address. So does the host and the VM have the same IP ? Does 2 VM have different IP ...
2
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1answer
43 views

Adding an additional routable subnet to router

I have commercial cable modem running Tomato 1.28 by shibby. It currently has a static IP address assigned via DHCP and works fine. I was assigned some additional routable IPs but they are in a ...
2
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1answer
22 views

Hopping Gateways in a Multi-gateway Network?

I'm on a network that has multiple gateways, and it seems that my machine connects to a different gateway than what my phone does. I'm curious as to how I may switch to another gateway. I've tried ...
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2answers
83 views

Can't connect to ftp server - Connection refused by server

I'm new to this forum and ftp. When I try to connect to a ftp server using filezilla, It returns - Connection attempt failed with "ECONNREFUSED - Connection refused by server". I run the Network ...
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1answer
56 views

Why need subnet when public IP available?

I am just entering into CCNA and there is a subtle concept of subnetting that is not going through my mind. My issue is when we have a private IP address, why can't that do the job - why do we have ...
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1answer
43 views

Elicit the IP of a black box

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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0answers
10 views

Masking external ip address using cmd or script on windows

I am using Windows and I want to mask my external ip address(not the "local "). using command prompt or some script, as we do in orbot on Android by swiping up in the app. i know about Tor browser ...
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2answers
71 views

find IP address of a device

I have multiple devices connceted to HP 1910-48g. Three of them are fingerprint scanner devices. We use them for time attendance reports. Because of some problems I have to reinstall software but in ...
13
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5answers
2k views

Identify an unknown IP in our network

I have a network containing 20 clients. I assigned IP range 10.0.0.1 to 10.0.0.20 to them. When I do an IP scanning I see someone using 10.0.0.131 in VMware. How can I find out which IP is this IP ...
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1answer
50 views

How can I assign an external static IP to my machine?

I have recently moved ISP's and in this transition I acquired 4 static IP's. My plan was to move my 1U rack-mount server from the datacenter i use to my home as I do not need the redundancy, ...
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0answers
5 views

Assigning a static IP to Hamachi VPN that's outside of DHCP range [duplicate]

I'm trying to assign a static IP outside of a DHCP range. The range is from xxx.xxx.20.5 to xxx.xxx.20.85. I was trying to set it to xxx.xxx.20.216 and I know Hamachi doesn't have an option that ...
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18 views

Accessing Web UI with Spark1.3.1

I am currently building and deploying spark with standalone mode, including one master node and two worker nodes, on Google Container Cluster. For monitoring purpose (also connecting to master from ...
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1answer
31 views

Can't find one virtual machine whose network IPV4 is DHCP enabled

I had a virtual machine which I connect remotely from my windows machine. Virtual machines TCP/IPV4 property was assigned one static IP address by the network administrator. I have changed that from ...
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27 views

point multiple ip address to hosting

I have centos server, earlier it had 1 ip [ a.b.c.d ] (external ip , eg., 141.101.114.59). Now, I bought 2 additional ip [b.c.d.e , f.g.h.i] (external ip , e.g, 190.93.244.58 , 130.93.245.8 ). I have ...
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27 views

Remote WOL over CISCO/FW not Forwarding

I'm trying to accomplish a Wake-on-LAN by triggering the two servers' public IPs. Internally, the WOL works like a charm (by either the internal or external IP), externally however, it does not wake ...
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1answer
50 views

Windows Server - Bridge ip address of different subnets

My Windows Server 2008 R2 has two network cards which are connected to physically separated networks. The Adapters have the following IP settings: LAN1 IP: 192.168.2.1 (Netmask 255.255.255.0) LAN2 ...
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2answers
38 views

If two computers use the same VPN can they be targeted with local IP addresses and avoid port forwarding?

If I am using a VPN and my friend is using the same VPN and has some program listening on a specific port on his computer, can I access that computer and port with a local IP address instead of having ...
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2answers
154 views

What is the IPv6 equivalent of 192.168.xxx.xxx? [duplicate]

I have a server which responds differently to requests from the general internet as opposed to the intranet. For IPv4 I can simply check if the address begins with 192.168. This works for my needs. ...
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3answers
68 views

Pinging ip address on another interface than the one receiving the signal

I have PCa and PCb. PCa: $> ip addr && ip route 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default link/loopback 00:00:00:00:00:00 brd ...
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1answer
59 views

Can't ping from my office to my home PC

Usually, I used TeamViewer to control my home PC and my office iMac both ways. But TeamViewer doesn't work sometimes. In this case, from my home PC to my office iMac, I used UltraVnc (on home PC) to ...
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1answer
102 views

Does a bridge between 2 TAP interfaces need an IP address?

I am trying to setup openvpn on a machine so that I have 2 different tap interfaces (tap0 and tap1) and then a bridge connecting those interfaces. The openvpn is setup with a server-bridge ...
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3answers
59 views

Static IP without a static IP

I need my network to have an external facing IP address that is static. My ISP will not provide me with one. I know I can use use DDNS to achieve this in a way. I want to setup an Exchange server ...
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1answer
35 views

How may I host a website on my local IP? [closed]

I am trying to design a web page. I want to assign the URL for it of my machine's local ip,i.e., http://192.xxx.x.x. If any may kindly suggest how may I have to do it? I prefer to use Python2.7+, ...
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2answers
46 views

Is it possible to get a router’s IP address from a Wi-Fi signal?

Is it possible to get a router’s IP address from a Wi-Fi signal without having to connect in, given that it's broadcasting Wi-Fi, but requires a WPA password?
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47 views

Hyper-V, Subnet Masks, External IP Addresses, Hetzner

I am pretty new to this so I am going to try and explain this as best as I can. All Servers I have dealt with in the past have always had an internal IP address, the external access has always been at ...
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1answer
27 views

Getting list of connected devices and types to a network without connecting

I'm using kismet to get a list of networks nearby and all the devices that are connected to them. I can get the MAC address off these devices, but I was wondering if it was also possible to get the ...
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2answers
30 views

When is an IP replaced in routing?

If I have 2 networks, 192.168.1.0/24 and 192.168.2.0/24, and my IP is 192.168.1.2 with the following routes: Destination Gateway Genmask Flags Metric Ref Use Iface default ...
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2answers
40 views

How to restore my default DNS?

I hanged my DNS servers to 8.8.8.8 in order to fix my web browsing (it worked). My coworkers want me to change it back, but i didn't save it! Is there any way to restore my old dns settings? I'm ...
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1answer
24 views

What software can I use to invert txt list IP-ranges? (not a reverse DNS lookup)

This is a blocklist, but I want to have only IP in the list to be allowed. instead of: 1.2.3.5-1.2.10.20 2.2.3.5-3.2.100.20, i need: 0.0.0.0-1.2.3.4 1.2.10.21-2.2.3.4 3.2.100.21-255.255.255.255. ...
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0answers
52 views

static IP not saving in LAN properties

static ip is not saving int lan tcp/ip properties i.e once I enter a static address with subnet mask, default gateway Etc.. it accepts the details, but then I close the dialog and when I come back in ...
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1answer
54 views

Public ip address showing in Hong Kong

It seems that my range of ip address are all showing as if they are in HK. For example, when I use google search, I am stuck on the .hk search site and it is extremely annoying. I also host a email ...
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2answers
71 views

How do I permanently assign an IP address with DHCP?

I am wondering if there is anything (software or hardware) out there that can do something I think I may have made up, Dynamic Static IPs. The idea is that when a new device connects to the local ...
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3answers
34 views

Will home router retain dynamic IP?

The cable from my ISP is connected directly to my computer. Problem is I have a dynamic IP address that changes every time I disconnect and reconnect, otherwise it will not change by itself if I stay ...
10
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5answers
812 views

How to check public IP address availability

I have a few public IP addresses given by the ISP service provider. My question is how to check which IP addresses are already used up and which are still available to use for new servers? Because I ...
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1answer
48 views

How can I add some static IP address at IPv6 for Windows 2012 DHCP server?

I would like to add some static IP address to my Windows 2012 DHCP server. I have tried to pair the IP address with its MAC address. At IPv4 it works, but how can do it at IPv6? Could anybody link a ...
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1answer
36 views

How to change IP of VPN interface?

I have connected to a VPN on Ubuntu. and type ifconfig shows VPN interface has an IP of 10.10.0.11. Unfortunately, there is another computer in my lan whose ip is also 10.10.0.11 and they're ...
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4answers
114 views

How to prevent computer from taking some IP address

Imagine you got a network to which other users can connect with their PC's, you have set up some rules, for example there is a DHCP server that gives addresses 192.168.2.100 - .254 and first 100 ...