IP address is a numerical label assigned to each device participating in a computer network that uses IP for communication.

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How to retrieve the IP Address Assigned to the machine by ISP

my question is regarding the IP Address assigned to a machine, whenever we go to any site which reveal our IP Address, they display a number which is assigned to the machine through which we are ...
7
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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 ...
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3answers
265 views

Email Marketing and Whitelisted IP Addresses - 100% Certain of Delivery

Not positive this is the proper forum in which to ask so please excuse if I should be looking elsewhere... Have a client I am email marketing for. My send IP Addresses have been whitelisted by the ...
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2answers
118 views

Inaccessible server after DNS server change [closed]

After configuring a domain name to use the name server of the new server, the new server had become inaccessible (even if using the IP address). Is this normal?
29
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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
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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 ...
7
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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"?
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3answers
104 views

How to enable my clients use a custom domain name

I want people to be able to use a custom domain name to access an application I have hosted on my server. From what I have read, people can do this by changing the A Record of their accounts to my IP ...
-1
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1answer
67 views

Which Class B address can not be used as host addresses? [duplicate]

Possible Duplicates: How does Subnetting Work? Is X.Y.Z.0 a valid IP address? I am a beginner in the field of Networking. Can 172.30.1.0 be used as hostID? If not, why? Please give me ...
0
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0answers
41 views

How to enable my clients use a custom domain name

I want people to be able to use a custom domain name to access an application I have hosted on my server. From what I have read, people can do this by changing the A Record of their accounts to my IP ...
0
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2answers
128 views

Should I ever configure a host with a public IP address to accept traffic from a private IP address?

I connect the 'net with a public static IP (my router's IP address for NAT) and a /29 subnet (for machines behind the router). On my router, I have: #sh ip route | inc x.x x.x.0.0/16 is ...
6
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2answers
2k views

DMZ subnet: to NAT or not to NAT?

I'm looking at setting up a DMZ behind a Cisco ASA that will contain a large number of HTTP front-end load balancers and SSL offload services - over 100 IPs, concentrated on a smaller number of hosts. ...
2
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5answers
1k views

Is there a way I can block people from a certain countries from visiting my website but allow certain IP addresses from those countries to visit it?

I want to prevent people from certain countries from visiting my website - but I want to allow some defined IP addresses from those countries to be able to access it. Is it possible? If yes, how?
3
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2answers
740 views

Deny Static IP Assignments

I am currently using a SonicWall Pro 2040 with DHCP enabled, but only with static IPs mapped to specific MAC addresses. There is no dynamic IP scope being used. Currently, no DHCP request will resolve ...
1
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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 ...
0
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1answer
433 views

Multiple internal IP's running on one external IP?

My ISP has given me 1 static IP address, however, I need to run multiple internal IP addresses (from VPS's) under that 1 public IP address. I have enough network connections to my router, but not ...
0
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2answers
156 views

Problem trying to access local website (settings in hosts file) on Host PC (Win XP SP3) from Guest PC (VM Win 7)

Host PC : Windows XP SP3 Guest PC : Virtual Machine running Windows 7 SP1 Host PC IP Address : 172.16.5.55 Guest PC IP Address : 172.16.6.62 On my Guest PC I'm trying to access a ...
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3answers
439 views

I have two public sites on my Ubuntu Server (Apache2). How would you distinguish the two when requesting them?

Sorry if the question is unclear. I have two sites which I would like to set up in Apache2 on Ubuntu Server. Both of them should be open to the public. I would like to set up a separate IP for each of ...
0
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1answer
93 views

Sending email from IP as domain Ubuntu

I want to install a mail server on an Ubuntu server, however I don't want to hook any domains up to it. Is it possible to configure it as an IP address, so my email address will be: me@ipAddress ...
1
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1answer
190 views

IP address resolution in Cassandra MultiDC setup

We have a scenario for which we are considering using apache Cassandra for deployment for our data storage needs.The setup is to be spread across multiple data centers in different regions(physical ...
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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 ...
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2answers
121 views

Adding More IPs to a Netcard on Linux

How do I add more IP addresses to a network card on Linux? Do I use the route command? It's Ubuntu Server 10.04 LTS.
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1answer
365 views

Allow website access from specific subnet, otherwise ask for credentials

How can I configure IIS 6 to allow access to a sub folder from our intranet without any authentication (well, the IP address needs to be checked but that's already working) from the internet only ...
-1
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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 ...
2
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4answers
1k views

Having public IP addresses for computers in private network

In one of the previous organizations I worked, all of our ip addresses were in public IP range. So, is there any advantage of having public ip addresses for private network?
3
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4answers
857 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?
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1answer
45 views

Connecting to a service from outside the network

I seek to run a server on the 8000 port on my machine. My computer is part of a wireless home network which is connected to the Internet by a Linksys router. In this scenario, how would a host outside ...
0
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2answers
1k views

Windows 7 DHCP client not working on Wired but works on Wireless

I've got a 1 year old Dell laptop running Windows 7 Pro 32 bit. Last week, the PC started refusing to obtain an IP address via DHCP, but this only happens on the Wired Ethernet connection. The PC is ...
0
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2answers
667 views

How to assign different ip address on devices connected to router?

Is it possible to assign different ip address to the devices which connect to my router? When I visit cmyip.com from my psp and laptop, I see that they're the same. I need this because I'm working on ...
1
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1answer
230 views

Fixed IP on Linux boxes in DHCP router LAN

Folks, I am trying to use fixed IP on few Linux boxes in my LAN which uses DHCP right now. My ISP router is configured to use DHCP and there already are quite a few laptop users who would want to ...
0
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2answers
956 views

How to change the 'internal IP address' of a Juniper SRX210H

How do I change the 'internal IP address' (Not the WAN IP) (192.168.1.1) to something else via the 'Juniper Web Device Manager'? Thanks!
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2answers
197 views

Multiple IP addresses on Network Card Win2003 [closed]

When I add the additional addresses on a network interface in Windows 2003 Server Enterprise Edition, starting from 2800 addresses there are some problems: Icons do not create, delete or copy from ...
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3answers
183 views

Virtual IP address for internet access

Can I use this software without an internet connection? http://www.cn2u.co.uk/vlip/ http://www.archive.org/details/tucows_336154_Virtual_Local_IP And if I understood correctly the software ...
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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 ...
1
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1answer
80 views

Giving a static IP to a VM in Server 2008

I have a dedicated server in Las Vegas. Yesterday I learn the awesome things about VMWare Server and I got that installed on it. Then I placed a CentOS 5.5 in one of the VM and its running as it ...
3
votes
4answers
109 views

Only able to use the first IP in a range from ISP

Right now I have a subnet of 16 IPs. I want all of the ips to be "owned " by my firewall. I have a watchguard firewall statically configured with X.X.X.225 and has X.X.X.226 - 238 as Secondary IPs. ...
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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 ...
0
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2answers
206 views

Server is losing its static IP address

I have a Ubuntu server with the following in /etc/network/interfaces: auto eth0 iface eth0 inet static address a.b.c.d netmask 255.255.255.0 gateway a.b.c.254 When I run ...
0
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3answers
2k views

Ubuntu iptables allow certian IP addresses

I have a riak cluster that I need to only allow certain IP addresses access to the information. I am currently using, -A INPUT -s 192.168.10.200 -j ACCEPT, to allow this IP address and at the bottom ...
15
votes
3answers
4k views

why is loopback IP address from 127.0.0.1 to 127.255.255.254?

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 isn't 127.0.0.1 ...
13
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1answer
5k views

How to disable http basic auth in nginx for a specific ip range?

I'm developing an application with facebook login. So far it's not public and is protected by http basic auth in nginx. Is it possible to disable http auth for facebook's ip range so that we can have ...
0
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0answers
329 views

DD-WRT multiple static ip's

I have a linksys router with dd-wrt installed on it. I have tried script after script people have suggested to allow for multiple static ips from my ISP (small business internet). I can not find one ...
0
votes
1answer
517 views

How can I find out the next IPv6 address?

I have a /96 block of IPV6 addresses and i'm wondering how i could some how find the next address (Since ipv6 addresses can contain numbers and letters). I know the first address could be in numbers ...
1
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1answer
168 views

Setting up a failover cluster on the internet?

Is it possible to use VPS hosting services available to set up a Linux Failover cluster on the internet ? (I believe Amazon cloud services allow this.) VPS providers allow you to use multiple ip ...
3
votes
3answers
7k views

SSL certificate for a public IP address?

I just tried buying a Comodo Positive SSL but it was rejected due to not supporting a public IP address, but instead they only support a domain name. Does anyone know any SSL certificate provider ...
0
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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 ...
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2answers
222 views

How can I assign a dynamic IP address to subdomains?

How can I assign IP addresses dynamically to subdomains created on my domain?
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2answers
478 views

how to map domain name to dynamic ip address

I have registered a domain www.blah.com and I would like to point this domain to my home computer which it is using adsl with dynamic ip address. More info: My router has dyndns client and my ...
0
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1answer
205 views

How can I map multiple sub-domains with a single A-Record?

lets assume I have the subdomains: a.sheehan.com b.sheehan.com c.sheehan.com i want to map them respectively to haha.com lala.com baba.com How can I have a.sheehan.com map to haha.com ...
2
votes
4answers
249 views

Should I worry about my static IPs?

We currently have a range of 12 static IP addresses through our ISP that I believe are leased. Now that the IPv4 space is almost gone, should I be worried that our ISP (it's a Time Warner fiber ...