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

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4answers
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multiple MAC addresses on one physical network interface (linux)

Simple question: How can I setup multiple MAC addresses on one physical network interface (linux)? Why? My ISP is checking ip<->mac on GW and I d like to route traffic through my "linuxbox" and ...
2
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1answer
5k 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: ...
2
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1answer
259 views

Intranet web site; sometimes using computer name works, othertimes the IP works..exclusively and alternating

I have created a web application hosted in IIS 7. When I deploy my web app to customers it can be reached via the computer name most of the time, however sometimes it will suddenly stop working. The ...
1
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1answer
647 views

How to change the network adapter bind order in Linux

The SNMP trap always uses the first IP address as displayed in the network adapter binding order on the computer. For example, assume that the computer has the following binding order: LAN ...
2
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2answers
833 views

Rewrite URL Domain Name when IP address used

My apache home server listens for HTTP requests on an alternate port (port 8080), but I would like to let users type my domain name (example.com) without having to specify the port. So far I've ...
1
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1answer
4k views

Permanently change IP address on SuSE 10

I am trying to change IP address of a SuSE 10 machine that is running Tomcat. I need to create a shell script to do this so could not use YaST. As some sites suggested on my Google search, I edited ...
0
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4answers
385 views

IP Address blocking best way to do this (in terms of security)?

I have had a user trying to hack into my server and muieblackcat pops up on my server, quite a few times. I just wanted to get some advice as to the best way to protect against this ie should i ...
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3answers
3k views

how find datacenter using a ip address related to that datacenter? [closed]

I have a vds and it's really good! I have some problems with my reseller of that server because of their support. I want to buy a server from that datacenter directly. How can I find that datacenter ...
0
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3answers
96 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
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1answer
69 views

How do I access a server from a specific IP?

I have a two systems on a private network 192.168.0.0/16. SysA has an IP of 192.168.0.30 SysB has two subinterfaces in linux, ETH0:0 with IPs of 192.168.200.213 and ETH0:1 192.168.90.20. If I'm on ...
0
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2answers
1k views

Restrict access to website in IIS to a range of IP addresses

I'm configuring a website in IIS6 to restrict access to a customer's IP address range. I've been given their IP address (81.145.41.114) and an IP range (172.17) which I am meant to allow access to. I ...
0
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1answer
384 views

ipv6 max_addresses in sysctl.conf (Debian 6)

I'd like to assign any number of IPv6 addresses to a Debian 6 host, but I see the following setting, and want to know what are the consquences of setting higher, or does this setting approach limits ...
0
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1answer
769 views

proxying ip from nginx to jetty/gwt

Good morning! I have nginx setup in front of jetty 6, which is running a GWT application. I am trying to forward the ip address, and all the answers I find on the internet tell me to do this: ...
4
votes
3answers
180 views

IPv6: Can one use more than 64 bits for the network ID

Wikipedia states: Unicast and anycast addresses are typically composed of two logical parts: a 64-bit network prefix used for routing, and a 64-bit interface identifier used to identify a host's ...
2
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1answer
639 views

Giving Virtual Machines in Xen their own IP Addresses

Installed Xen on a server at home, recently moved it to a data center. Worked fine with DHCP behind my router, with each virtual server and the dom0 getting its own IP address. At the data center, ...
0
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2answers
210 views

Server reverts to DHCP from time to time

I have an Ubuntu 10.04 server with static IP address configuration: # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet static ...
2
votes
1answer
515 views

Managed switch port-based DHCP allocation - general case?

I saw a strange comment bagging IT departments (i.e. sysadmins) on Slashdot the other day: half the time they cant even do a simple thing like provide a jack with a set IP address for us Reading ...
2
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3answers
3k 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
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4answers
2k views

Resolving real IP address out of a dynamic dns address

I recently opened a dynamic dns user (at no-ip for that matter..) for my own personal needs and especially for ssh-ing my computer whenever I need to, without knowing it's static IP. My questions ...
0
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2answers
79 views

Changing IP address of current server [closed]

I have VM with IP address 10.10.10.99 how do I change the IP address to something else for e.g. 10.10.10.100 ? I have pinged to 10.10.10.100 and there is no such server in the network. Is there any ...
0
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1answer
284 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 ...
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votes
1answer
83 views

Use old server IP address to New server [closed]

Now we are going to use new server to host our website. We are going to use our old server IP address to new server. Can we replace our new server IP address by old server IP address? If possible, ...
3
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1answer
4k views

Can a DHCP reservation use an IP address in the exclusion range?

Windows Server 2008 R2, running the DHCP service. DHCP Scope: 192.168.1.1 - 192.168.1.254 Exclusions: 192.168.1.1 - 192.168.1.99 If a reservation uses an IP address in the exclusion range (like ...
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1answer
274 views

HTTPS for server IP address shows as invalid certificate

I have a website, say www.foo.com with an IP address 1.2.3.4 I have an SSL certificate for www.foo.com and when I visit https://www.foo.com all is good. However if I visit https://1.2.3.4 it says the ...
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2answers
58 views

Synchronize information in same server with multiple ips [closed]

So i have a unix dedicated server and multiple ips. I am running a website on both ip address. 192.168.1.0 192.168.1.1 How do i make it so the files and folders on both ip addresses are ...
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3answers
139 views

What information can an outsider obtain from my system by knowing only the IP address?

If somehow an intruder becomes aware of the IP address of my system: What information can he obtain from my system or about my network? What type of harm he can do to my system remotely?
3
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3answers
226 views

Subnetting Challenges

I am trying to plan out a network with the following requirements and am having problems trying to complete a subnet plan for my network. The network consists of 3 routers that connect 3 different ...
2
votes
2answers
769 views

ISA 2006 does not allow traffic using FQDN

I experience an issue accessing Tomcat running over SSL with MS ISA 2006 in front. When I access using the internal IP address (e.g. https://10.0.42.136/...) everything works fine and ...
46
votes
7answers
3k views

How to take full ownership of an IP address?

My business is... troublesome. What I do is legal in every country on earth, but some people don't like it, and make it so tough on my poor ISPs that I am forced to go looking for new providers more ...
6
votes
2answers
776 views

Amazon EC2 multiple private IP addresses per instance

I have a scenario where an application requires multiple private IP addresses but does not require the resources of multiple instances. In this case, I would like to run multiple jboss instances on ...
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2answers
1k views

How to fetch new IP address under Ubuntu Server on VMware Workstation?

I have VMware Workstation 7 and Ubuntu Server 10.10 installed on it. When I copied my virtual hard drive to another PC it took same IP address. Is it possible to somehow receive another IP address ...
0
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1answer
4k views

unable to ping hostname, but \\hostname\c$ works?

I'm having a strange issue on my initial lab setup. Situation: Host with OS Server 2008 R2 64bit, on this host a Virtual Machine in Hyper-V with OS Server 2008 SP1 32bit. The virtual machine has a ...
0
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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 ...
0
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2answers
388 views

How can I make the most effective use of limited static IP addresses for a mail server?

I am running a Zimbra ZCS 7.1.2 server. The server is setup to host multiple domains, 3 at the moment. But I have a problem and I think I am over thinking the solution. The problem is I want every ...
3
votes
3answers
2k views

How to bind a non-local IPv6 address?

Is there an equivalent of net.ipv4.ip_nonlocal_bind for ipv6 ? Need to start my nginx on boot on such an IP... My Ubuntu doesn't have this IPv6 assigned on eth0 quickly enough despite this ...
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1answer
484 views

Setting up reverse DNS for a /25 block of IPs

I've currently got a block of IPs that go from xxx.xxx.xxx.128/25 Here's my current rDNS setup: $TTL 12h $ORIGIN 128/25.xxx.xxx.xxx.IN-ADDR.ARPA. @ IN SOA ns1.domain.com. ...
1
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1answer
80 views

Setting up internal and external IP [closed]

I am quite new at setting websites up to contain SSL certificates and allow them through a firewall. I am currently at step one and have been told that I need to set up an internal IP address on my ...
10
votes
3answers
801 views

Should I split my data network into 2 separate VLANs?

I am currently using 10.54.0.0 /19 for all my desktop clients and printers. We have approx 550 clients/printers. Besides bandwidth, which is barely being utilized, are there any other reason to ...
0
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2answers
1k views

Force DHCP server to give a new IP address

i connect to the web via LAN and IPs are assigned via the DHCP server. so a simple sudo dhclient -r sudo dhclient does not work. is there another way to get a new IP address from the DHCP server? ...
1
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3answers
417 views

DNS unavailable; IP address shared by 4 websites. How to extract numerical addresses of each website?

Preliminary note: our DNS service is down, and I have no access to the website settings; I am just a team member trying to help people who need the website right now. Four websites share the same IP ...
-4
votes
3answers
812 views

Why most local addresses are like 192.168.xxx.xxx? [closed]

Is it some standard/practice or technical requirement which force network engineers to use this IP address pattern?
1
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6answers
2k views

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 ...
1
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3answers
271 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
135 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?
7
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3answers
4k 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
118 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 ...
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votes
1answer
71 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
49 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
votes
2answers
135 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
votes
2answers
3k 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. ...