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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Virtualbox Internal Network : Communication between 2 VMs not working

I set up two Kali Linux VMs, both are in the same internal network. I assigned them a static IP address : ip addr add 192.168.0.<VM number>/16 broadcast 192.168.255.255 dev eth1 Where eth1 ...
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17 views

How to get my router to forward IP address to web app?

My web server is behind a Microtik router v6.1. My web app is only able to see the router's IP when referencing "REMOTE_ADDR" or "HTTP_X_FORWARDED_FOR" (asp.net app). How do I enable "IP forwarding" ...
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77 views

Is a switch just a simple router?

A switch connects computers together. As an example we set up a switch to create a network. When computer A wants to speak to another computer B, it sends the packet to the switch (it has the ...
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2answers
23 views

access over different IP network over the same cable

I have two machines: A and B A and B are in the same Ethernet network divided only be a switch but they have different IP network. A is on 10.0.0.1/16 and B is on 172.17.1.1/24. I have access to A ...
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2answers
21 views

Acessing samba shares on different internal network with different IP range

As you can probably see from my topography, my Raspberry Pi is directly connected to the ISP modem/router with an IP of 192.168.1.2, whereas my PC is one network underneath with an IP of 10.0.0.4. ...
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8 views

CentOS 7 can't ping from server

I'm having a Strange issue with CentOS 7. I have my server setup with 2 NICs a private network and a public network. I'm able to ping the server on both the private and public IP. But I cannot ping ...
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3answers
46 views

Find a computer's hostname by IP address? ping/nbtstat/nslookup don't work

Note: Windows environment (servers & workstations): I'm having a small issue here at work where a server went down and the (not very smart) tech guys don't know which server was until we give them ...
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2answers
21 views

confused on my allotted static ip addresses and hope to get clarity

I was given this for my dedicated server: xxx.xxx.232.80/28 From what I gather, my ip range is xxx.xxx.232.80 - 95 (or 94?) I'm not sure since I really don't understand what a broadcast ip does for ...
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29 views

Different servers on the same port ipv4 / ipv6

Say I have two TCP servers A and B. A is an ipv4-only server listening on 127.0.0.1:10000. B is an ipv6-only server listening on ::1:10000. Can I start these on the same machine? That is, how are IP ...
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1answer
15 views

Custom entry in hosts file not directing to correct IP

I have an entry in my local hosts file pointing to: $my-server-ip development.$client-domain.com When I ping development.$client-domain.com, I get $server-ip, but when I visit it in a browser, I do ...
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2answers
57 views

Why do some domain names contain numbers and strange words?

Here are some examples which appear under the foreign address field when I run netstat (on Win7): lhr08s06-in-e11 edge-star-shw-12-erc3 Why don't these look like standard internet domain names (eg. ...
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3answers
37 views

Understanding IP addresses on Linux machines

When I read /etc/hosts on my Ubuntu machine, the first two lines are as follows: ipAddr1 localhost ipAddr2 nameOfMachine Are these IP addresses characteristic to my machine or are they related to ...
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1answer
44 views

What information can my ISP see from my router?

I installed a new router today and saw my IP address change because the new router has a different MAC address and I am just curious on what information my ISP can see from my network. I know they ...
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23 views

How can I connect to UNC path on an external server in Windows Explorer?

I am using Windows Explorer and would like to connect to a certain IP address. After that, I want to connect to a different IP address through the server. Ex: A -> B -> C A is my current computer. B ...
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2answers
38 views

Link Domain to home server

I've bought a domain (for i.e. www.mydomain.co.uk) and I've a home web server with nginx and PHP5. I want link the domain with my static home IP. What should I do? What I did: I tried to put in name ...
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29 views

Route IP traffic to different machines based on API call

I have a requirement to route IP traffic on public IP a.b.c.d:xyz to either e.f.g.h:xyz or e.f.g.i:xyz, based upon some known state of those machines (known to my app). The traffic itself would not ...
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1answer
17 views

Updated DNS zone can't be seen from my local network

I have updated a domain name DNS zone on 123-reg.co.uk where I bought the domain name. I have only updated blog A record to different hosting(IP) On my PC home (windows) or another PC in the same ...
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1answer
41 views

Understanding IP Information Results

Am trying to understand why some IPs like this one shows results in different country. This below output is from using IP Information function provided by DNSStuff.com. This was a key IP in ...
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1answer
43 views

windows 7: assign static IP address [duplicate]

I want to connect two laptops with a crossover Ethernet cable, in order to synchronize them with ntp. One laptop runs Windows 7, the other one Ubuntu. On Ubuntu, in order to assign a static IP ...
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1answer
40 views

Cisco gear - finding mac address of a device based on Ip address?

Say, I have some devices connected to cisco routers. I want to be able to query an api or something using an IP address of one of the devices, and receive back it's mac address. Is this possible? ...
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1answer
15 views

MediaWiki Availibility for Local and External

I'm currently hosting a MediaWiki site on my computer. I'm forwarding port 80 to my computer, and I'm able to access it from outside the network, as long as the $wgServer variable in ...
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0answers
53 views

*.org domain websites are not loading

The problem is that any page with *.org domain in not loading on my computer (Ubuntu 14.04). Any other domains like *.com, *.net are loading! This is very strange. I tried in different browsers, and ...
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5answers
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How does a server get notified about the HTTP request?

I have a basic understanding of how HTTP works. I understand the client (web browser) makes a request and server responds back to the request. However, the thing I don't understand is how does a web ...
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13 views

How to forward DHCP broadcast messages between two interfaces using ebtables?

I have two interfaces, WLAN and LAN, on my linux system. How can I "forward" DHCP broadcast messages received on WLAN to LAN using ebtalbes?
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3answers
54 views

How does a web server return an HTTP request?

I'm sorry if this is a really stupid question; my networking knowledge is pretty sparse. So, a user makes a HTTP request to some address. That request comes from an address on a local subnet, but the ...
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1answer
26 views

Blocked or masked IP

I had an email returned as blacklisted by AT&T and in searching for a remedy came across mxtools and whitelisted.org. Upon visiting both sites an IP in the UK was default loaded 88.208.246.34. It ...
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1answer
66 views

“DoS attack: Smurf” in router logs - should i worry?

Here is 2 day filtered log from my Netgear 6300 Router. It seems that I am constantly having SMURF attacks. Based on my router settings it seems that I am being protected. I have "Disable Port Scan ...
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2answers
32 views

how to unblock ip address with iptables command?

I get my own ip address (maybe 123.45.6.7). iptables -I INPUT -s 123.45.6.7 -j DROP Now i was blocked myself,when i login server with other pc ,how to write iptables command to unblock myself? I ...
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2answers
37 views

Quick way to calculate subnet IP and broadcast IP

I'm having trouble findind a quick/effective method to determine valid IP range based on given router IP and netmask I know how to calculate the subnet IP and the broadcast IP by converting all the ...
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2answers
50 views

Why does a router need to know the modem's static IP address?

Background: I just ordered a static IP address from my ISP. I now have to configure my router to use the static IP, but I'm not sure why. Why does the router need to know the public IP address if it ...
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52 views

I can enter my website using internal/public IP, but can't enter using my domain name

Couple days ago I bought another PC just for server purpose. I have already installed Ubuntu 14.04 LTS, LAMP, Mail Server SSH Server (or Service?), also PHPMyAdmin, Webmin and TeamSpeak 3 server. ...
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1answer
30 views

How to add addional IP addresses to an interface through batch file

I have assigned a IP address to my LAN interface through netsh int ip set address "LAN" static 192.168.0.99 255.255.255.0 192.168.0.1 Now I want to add 192.168.4.20 with gateway 192.168.4.1 to the ...
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1answer
48 views

How can I tell if my ip address is static or not (Mac OS X)?

Well everything is in the title really... :-) I want to exclude my IP from my GA account but there is no point in doing that unless what I get from http://whatismyipaddress.com/ for example, is a ...
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1answer
18 views

Adding virtual interfaces (not VLAN) in linux

for some software testing, I need 12 different IP addresses to contact, each one with a unique MAC address. I just set up an Arch Linux VM but I can't figure out, how to configure virtual network ...
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1answer
52 views

Wifi, VPN and IP addresses

I am connecting to a set of VPN servers using wifi on my Macbook Air. I am trying to understand the triangle of relationships between the wifi connection (provided by my ISP), the connections to the ...
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24 views

How to add 2 ip addresses to a LAN interface using batch file

How can I add 2 ip addresses to a single interface using CMD. So, I can run it as a batch file.
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1answer
44 views

Batch file for configuring the ip address and removing it

My pc has a network configuration IP- 192.168.0.99 192.168.4.20 Mask- 255.255.255.0 255.255.255.0 Gateway- 192.168.0.1 192.168.4.1 I am connecting to the internet through the ...
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29 views

Strange IP settings issue

Friend of mine is having a puzzling issue I've not come across before. Windows Vista box, logs into an SBS2003 domain controller @ 192.168.1.50. The first time the issue popped up (about two months ...
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2answers
42 views

IPv4 and IPv6 from different browsers on same computer

On my laptop, in Chrome, when I Google "What is my IP?", I get an IPv6 returned as my public IP address. On the same laptop, in Firefox, I Google the same thing, and get an IPv4 returned as my public ...
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1answer
67 views

How to Assign Public IP to a device plugged into the LAN port of a Wifi Router

I have these two public IPs from my ISP. As an example, let's say the two IPs are: XXX.XXX.XXX.180 and XXX.XXX.XXX.181. They are on the same range and right next to each other When I access the GUI ...
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0answers
45 views

Batch check if IP is within specific range

I'm trying to make a batch script to get local IP-address of active NIC (could be wireless or local). To get IP adress I have used following line: FOR /F "delims=[] tokens=2" %%a in ('ping -4 ...
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0answers
45 views

DNS issue between Subnets

I have the following NET Configuration: ROUTER: IP #1: 192.168.17.1 IP #2: 192.168.8.10 PDC-DNS-DHCP Server: OS: WS2008R2 IP: 192.168.17.2 NAME: M2SCDC01P Domain Name: test.local ...
2
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1answer
62 views

IPv6 Web Site, But Fails IPv6 Readiness Tests

This is driving me bonkers. I have a Windows Server 2012 R2 machine running IIS 8.5. IPv6 is working fine on this machine. All the IPv6 test sites I browse indicate this machine is indeed running ...
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1answer
55 views

How do I create subnets given these constraints?

I am trying to tackle the following subnetting problem: Prepare subnetting for an organization that requires 2000 hosts to be placed on the network. The maximum number of hosts on a subnetwork is 300. ...
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2answers
48 views

How can I get a list of IP addresses that connected to an Apache server? [closed]

I'm trying to get a list of IP addresses that have connected to the Apache server in the past week for port 80, port 22 (the port FTP uses?), and whatever the port ssh/ putty uses. What is the command ...
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1answer
16 views

Which criteria is used by the linux kernel to pick udp source ports?

They are all of course greater than 1024, but can we narrow this range a bit more? Via wireshark the lowest I've seen is 30XXX. Does the kernel specify it's criteria somewhere?
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21 views

Create Proxy Server using command line utility

Currently I am using Hola (https://hola.org/) an extension to Google Chrome. It works like charm and I can access any site and it mimics that it is from some other Country, just hiding my real Ip ...
2
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2answers
61 views

Is there a chance that my real IP can be traced if I surf through a VPN?

Is there a chance that my real IP can be traced if I surf through a VPN? Which IP is registered to any particular website I visit? What if I disconnect the VPN after browsing, can my real IP be ...
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1answer
29 views

How to access ADSL modem web-interface thru router?

I have 3 devices in my network: D-Link router (fixed IP 192.168.0.1, DHCP enabled) ADSL modem (fixed IP 192.168.0.2, DHCP disabled; bridging mode, PPPoE) PC (dynamic IP) If I connect the modem to ...
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3answers
31 views

Is there a downside to configuring a modem to use a dynamic IP when it has a static IP from the ISP?

I'm looking at the setup of a modem and noticed that it's been setup to take a dynamic IP, but actually it has a static IP. Is there any downside to doing this or a reason to change it? The internet ...