1
vote
0answers
30 views

How often does the geolocation associated to an ordinary IP address usually change?

Can anyone tell me how often should i expect a routable IP address (either v4 or v6) to have its associated geolocation (country + city level) changed, in average? I'm asking this because i'm ...
-4
votes
2answers
104 views

Exercise regarding public IP address and its “class C” [closed]

An exercise I am doing asks the following:- Identify what your public IP address is. Using public information sources, see what you can learn about your IP. If you don'ʹt find anything on your ...
0
votes
1answer
60 views

What happens when I run dev server on 0.0.0.0? [closed]

When working on web-apps I'll usually run a development server on my local machine at localhost / 127.0.0.1, and if I need to show a colleague something I will check my ip address with shell command ...
0
votes
2answers
39 views

How do proxy servers change their IPs? [closed]

A lot of proxy servers say that they change their outgoing IP addresses every X hours (many seem to do it twice daily). How they do this? Is it something that a hosting company would do, or an ISP?
-4
votes
1answer
49 views

NAT mode virtual machines shows same IP address [duplicate]

I have two virtual machine running on a virtual box. VM 1 and VM 2 The network is in the NAT mode (default). Both the machines have the same IP address.So I assume that they are in two different ...
0
votes
1answer
46 views

Can a router connect an IP network on one interface, and use one of the network's IP on the interface to the internet?

This is part of a question from a networking class. A router has IP 202.55.0.5 on the local network 202.55.0.0/21(through eth0), and uses IP address 202.55.0.6 to communicate with the internet ...
-1
votes
1answer
70 views

a special case about subnet mask calculation [duplicate]

I have an IP addresses 192.168.2.0 and a subnet 192.168.1.0/10 And I have two questions. (1) Is 192.168.1.0/10 legal? As the 9th least significant bit is not 0. And if (1) is true, does 192.168.2.0 ...
7
votes
2answers
1k views

How do I move static IP address from one ISP to another

We have a linux server pointing to a static IP address from one major ISP. We recently changed that ISP to a new ISP and I am wondering if there is a way we can move the static IP address to work ...
3
votes
3answers
173 views

What's the formal definition of the magic number of a network? [closed]

I know what the magic number of a network is. I know how to compute it - 2 ^ ((32 - n) % 8). I know what it's used for and how to use it. I don't how how to define it formally. In a recent interview ...
1
vote
1answer
198 views

CentOS network configuration doesn't work as expected

Maybe I'm doing a rookies mistake but I can't find out what I'm doing wrong. On a Centos Box, I want to put static ip on my server so edited /etc/sysconf/network-scripts/ifcfg-eth0 as follow: # Intel ...
-1
votes
1answer
54 views

Specify what network connection to use based on IP being accessed [closed]

Basically, we have a number of machines with two network cards. One is wireless, one is not. The wireless is connected to the internet, while the other one is connected to a route and a bunch of ...
-2
votes
1answer
802 views

How does one set a dedicated IP address to a minecraft server on Windows Server 2008 R2? [closed]

So I bought a dedicated server from staminus.net just for running a Minecraft server. On Minecraft, the default port is 25565. I am wondering how one makes it so that there is no port on the IP ...
-1
votes
1answer
119 views

need to figure out this subnet mask please is it correct? [duplicate]

Possible Duplicate: How does IPv4 Subnetting Work? The largest subnet has 300 hosts so I am trying to workout the number of host_id bits I require for the mask but I am confused as each ...
0
votes
0answers
68 views

Adding an IP range to SuSE 11

I'm looking to at a /22 to eth0 in addition to the address that is already bound to than interface. I'm familiar with using ifcfg-eth0-range0 in Redhat to accomplish something like this, but not how ...
1
vote
3answers
390 views

nginx as proxy using a specific source ip

I'm using nginx to serve static file and proxy other requests to some Tomcat instance. The problem is that I don't know how to choose which IP address will nginx use to connect to Tomcat. Each Tomcat ...
1
vote
1answer
972 views

Is it possible to connect 2 networks with same IP range?

I have two networks with the same IP addresses in use and I need to connect them. I have a third network between the two to connect them but I need to know : - is it possible to communicate iof the ...
2
votes
3answers
450 views

Find ISP/IP address by geographic location?

I'm trying to find an ISP or IP address by geographic location, Is this possible?
-3
votes
2answers
305 views

Why does ip address have a dash [closed]

Why does my ip address have a dash at the end of it? It was assigned to me by AT&T Uverse. 106.206.186.224-8
3
votes
6answers
2k views

How reliable are IP address-based firewall restrictions?

On some of my production systems that need to be accessible outside of the LAN I will sometimes add a firewall restriction at the edge to only permit traffic on, say, RDP from a specific origin IP ...
8
votes
2answers
222 views

How even is the distribution of digits in the last part of an IPv4 address?

I have a redirect script operating on a website I created. It sends 1/3 of visitors to site A, 1/3 of visitors to site B and 1/3 to site C. It works by dividing the last part of the users IPv4 ...
1
vote
1answer
2k views

nginx not serving requests to external IP address

I have nginx running on port 81. I can telnet using telnet 127.0.0.1 81 and everything is fine. But when I try to telnet to my machine from my Mac (an external IP address), I just get this error: ...
0
votes
1answer
240 views

How many assignable addresses are needed for a router-to-router connection?

I have an address zone (let's say 150.41.0.0/16) and I want to subnet it optimally using VLSM. I have a number of VLANs, each with a minimum number of needed addresses, and a couple of ...
1
vote
3answers
1k views

Are same IP address with different submask unique? [duplicate]

Possible Duplicate: How does Subnetting Work? In a same block of IPv4 addresses, can there be same IPs with different submasks? For example, can I have this: 180.70.65.140/26 ...
0
votes
3answers
4k views

Finding the first and last address of a block of IP addresses with subnet mask

I am not sure if this is the right place to make this question but I thought this is one of the most appropriate SE's site to make a question on networking. Please move it to other more appropriate ...
0
votes
3answers
2k views

A Way To Determine IP Range From CIDR? [duplicate]

Possible Duplicate: How does Subnetting Work? Is there a formula or a calculator for determining an IP address from CIDR that I was given: 38.103.17.160/27? I would like to know the ...
7
votes
4answers
643 views

CIDR Ranges for Everything except RFC1918

I'm looking for a list of CIDR blocks for "The Internet", i.e. everything from 0.0.0.0 to 223.255.255.255, excluding RFC1918 address space of 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 (yes, I know ...
29
votes
4answers
2k views

Is 0.1.2.3 a valid IP address?

Are IP addresses with all zeroes in the first octet valid? For example, can 0.1.2.0/24 be a valid subnet, with network address 0.1.2.0, broadcast address 0.1.2.255 and an usable address range from ...
33
votes
5answers
2k views

Is it valid to have part of an IPv4 address set to zero?

I am working on a change in a Java EE application that would authenticate based on the user's IP address using ServletRequest.getRemoteAddr. We store IP address ranges (FROM_IP and TO_IP) in a ...
1
vote
1answer
282 views

Unknown IP-address shows up in access.log

I am setting up a production environment on my VPS for a Rails app I'm working on. I have not registered a domain name yet, so what I did was just edit my local hosts-file manually. This works fine ...
3
votes
4answers
859 views

Is 0.0.0.0 a class A IP address? [closed]

Some sources say that class A IP addresses start at 1.0.0.0, and some say 0.0.0.0. I have also heard that 0.0.0.0 is a special kind of IP address. So is 0.0.0.0 a class A IP address or not?
-1
votes
2answers
2k views

DNS simulation for testing purposes?

I'm wishing to simulate DNS for testing purposes, having decided to learn about it for if I was to go into webhosting. I've considered BIND (and tried setting it up), but that wasn't suited to my ...
1
vote
1answer
1k views

nginx - serve static html if ip is not mine?

I'm trying to switch some stuff over to a domain running nginx. Is there a simple way to just put my ip address in the configuration for the subdomain and say "If ip is not mine, then just serve this ...
0
votes
4answers
234 views

Understanding IP Address Blocks [duplicate]

Possible Duplicate: How does Subnetting Work? I have a dedicated server rented from a company running Server 2008, and I just bought another block of IP addresses from them. They have ...
1
vote
4answers
800 views

Why is this China IP hitting my web site?

I have a web site that uses a couple hundred domain aliases, including franchise-dallas.info, franchise-delaware.info, and detroitfranchise.info (see more below). I have been getting ten to twenty ...
1
vote
3answers
2k views

What could prevent one Amazon EC2 instance from pinging another instance's Private IP?

I have multiple Amazon EC2 instances which need to communicate using private IPs. However, so far I've been unable to ping one instance's private IP from another instance. I can ping external ...
7
votes
3answers
3k views

Is there an “official” name to the 0.0.0.0 IP address?

As 127.0.0.1 is known as the loopback address, is there a shorter term to refer to 0.0.0.0 other than "the IP address who means all IP address on local machine"?
0
votes
1answer
117 views

class A addresses [closed]

Someone correct me please if I am wrong, I could have sworn I read somewhere that class A Ip address owners basically owned that space and IANA had no way to get them back and it was possibly that ...
3
votes
5answers
4k views

associate name with ip for ssh?

Let's say I just have an ip address for a server and I don't have a domain with it (it's just a database server, so it doesn't need a domain). I don't want to have to remember the ip address every ...
6
votes
3answers
5k views

How can I do traffic shaping in Linux by IP?

We have a transparent proxy setup. I tried looking for traffic shaping in Linux, and all I could find online was to limit traffic by interface (eth0/eth1...). I need to limit the bandwidth (never ...
1
vote
2answers
243 views

Best way to get thousands of IPs bound to a NIC in Windows 2008 and 2003?

I had setup a small application that uses WMI to setup a nic with multiple IPs. Does someone know of a better way of doing this once we start unsing thousands of IPs on a single nic? I amnot much of a ...
-1
votes
4answers
753 views

Ethernet interface number changed, and old one does not exist, but does not leave IP address

I have a virtual machine with Mandriva 2007.0 (yes, old - unfortunately we do not have a choice here). Anyway, the problem: Before reboot: active network interface = eth0. No other interfaces ...
0
votes
3answers
92 views

Two Websites, two directories, two domains, one IP

I am hosting two separate sites with two separate domain names on the same server. Without using some kind of NAT forwarding, how can I set up my apache server so that, depending on which domain is ...
1
vote
2answers
8k views

Can I use nmap be use to discover IPs and mac addresses?

When I need to locate the IPs of devices by their mac address on a Windows system, I normally use Advanced IP Scanner (from radmin.com) to scan the network, then I use arp -a to list the mac ...
0
votes
1answer
992 views

How can I reroute IP addresses for my router?

I want to do something similar to what the hosts file does. I just want to set it so that certain IP's always go to the IP I want it to go to... eg. Have... 158.204.281.222 always go to ...
4
votes
2answers
604 views

Rapidly changing public IP addresses on certain networks?

I run/develop an online game where many of our users are in southeast asia. I recently went to southeast asia and made an alarming discovery. Anywhere I got internet access, whether it was via 3G, a ...
2
votes
2answers
738 views

Why would I need more than 1 public IP address for a single dedicated host?

What is the point of having more than a single public IP address for a dedicated server with a single network interface? I see a lot of dedicated server hosting offers that show something like ...
2
votes
2answers
769 views

Funny IP address. Please help

So I have a computer on my network that will not connect to the internet. It says it's connecting on IP address 169.254.114.198 which is an unassigned address. None of my other computers are having ...
3
votes
3answers
262 views

only allow ip from australia

i want to only allow website visitors from australia. has anyone done this before?
2
votes
2answers
9k views

How do I create a virtual IP address?

i am a student so i am pretty new at this but i am making a web cluster with two web servers so that if one server fails the website still stays up. my question is how do i assign a virtual IP address ...
50
votes
4answers
49k views

What's the difference between ip address 0.0.0.0 and 127.0.0.1?

I do know that 127.0.0.1 ~ 127.255.255.254 are the loopback IP addresses for most modern operating systems and we could use these IP addresses to refer to our own computer. But what's 0.0.0.0? It ...