-2
votes
1answer
26 views

Can I conclusively determine that a remote web server is denying access by blocking my IP address? [closed]

Let's say a web server administrator has configured his web server to deny traffic from my IP address or address range and throws an http 403 forbidden when I hit the site. (In this scenario I am ...
7
votes
7answers
840 views

Best choice of private addresses for a “device area network”

I'm building an appliance consisting of several subdevices connected by ethernet inside the appliance. The appliance will connect to the customer network. The customer network can be using private ...
1
vote
1answer
100 views

Access web service from external network

I'm trying to deploy a web service (wsdl) on a machine running Ubuntu 12.04 and access it service via external network, i.e. the internet. At first, I tested with apache2 by starting it and accessing ...
0
votes
0answers
49 views

netstat ? Huge buffer build-up

we are seeing the following: The netstat line which shows the buildup: 10:51:34|tcp 4294967258 0 192.20.1.228:53824 192.20.1.228:2500 ESTABLISHED The netstat command used to generate the ...
-4
votes
1answer
116 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
40 views

Move single ip address accross network or virtual machines

I'm currently trying to set up a small development cluster inside our enterprise network. We have a system to provision "disposable" virtual machines and move them to any of our 12 servers if needed. ...
0
votes
1answer
123 views

Can't obtain ip-addres from my DHCP server

I can't obtain a ip-addres from my dhcp-server and it's going trough a firewall (pfsense), The firewall(pfsense) and DHCP server are two virtual machines on my physical server(ESXI). As rules i use ...
-2
votes
1answer
265 views

Strange way to configure IP on Server with Hyper-V. We're doing something wrong?

Scenario (real with address/names altered): Windows Server 2008 R2 with Hyper-V installed. Originally, there were 2 machines let's call them FileServer and MainServer. The FileServer does a little ...
0
votes
1answer
48 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 ...
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 ...
1
vote
1answer
109 views

Why can't I associate a private EC2 IP with an Elastic IP from VPC

I have three entries in my /etc/network/interfaces with eth0:0... eth0:1... eth0:2... and the ips 10.0.0.210 10.0.0.211 10.0.0.212 ...they're all working fine. So I added a new entry, eth0:3, ...
-2
votes
2answers
259 views

What does IP Address quadrants reperesent? [closed]

If a IP address is 192.168.112.28 what does each quadrant represent in this IP address?
-2
votes
1answer
161 views

How do i set public ip address for office? [closed]

My assignment has this thing. Im given with the public ip address of 203.220.72.0/24. This is public ip address for router.The office got 20 hots and I need to give public ip address to those hosts, ...
-1
votes
1answer
124 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 ...
-2
votes
1answer
52 views

Windows Server 2003 not loading web pages by domain, but loads/pings by IP (Server not found) [closed]

It's really weird and randomly started happening.. Example: I open firefox or IE on the server and try to load "google.com". It doesn't load. Pinging it doesn't work either. However, if it use the ...
20
votes
4answers
1k views

Customer site is out of IP addresses, they want to go from /24 to /12 netmask… Bad idea?

One of my client sites called to ask me to change the subnet masks of the Linux servers I manage there while they re-IP/change the netmask of their network based on a 10.0.0.x scheme. "Can you change ...
0
votes
1answer
103 views

How do you initialize networking on a new Xen guest VM?

We have a Citrix XenServer setup, and while I personally lean more towards Dev than Ops, I've got an issue that's been bugging me. When you provision a new (Linux/Ubuntu) guest, how do you get it to ...
-2
votes
4answers
332 views

How do I say two IP address are in different network [closed]

This is very basic question but i really could not find how it will be.There are two network IP address are given 10.0.0.10/24, 30.0.0.10/24 .Would like to know are these two addresses in same network ...
0
votes
1answer
410 views

Reach pc in the same network but a different subnet

PC 1 in subnet - 192.168.1.x PC 2 in subnet - 192.168.2.x Is it possible to access one pc from the other by its IP address without special router config? related: How to reach a device on a ...
3
votes
1answer
159 views

Network Design and Implementation

I am currently designing the network in my office, which is relatively small now but it plans to grow very fast. The design is pretty much done, the problem is occurring during the implementation. So ...
2
votes
1answer
185 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
vote
1answer
501 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 ...
0
votes
1answer
249 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
2k views

How can I find my subnet mask?

The popular answer to the question " How does Subnetting Work? " does a nice job in explaining subnets. I remember learning about the network classes back in CCNA class but that answer mentions ...
1
vote
2answers
414 views

Does each domain have to be tied to a unique IP address when using SSL certs?

I have a Zimbra ZCS 7.1.3 server it running the OSE version. The server hosts 4 domains for email. Each of the email domains has its own SSL cert that is self generated. Something that has sort of ...
2
votes
3answers
2k 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 ...
2
votes
2answers
2k views

How to redirect all Internet traffic to OpenVPN Server

I have seen working solutions around the issue of forcing Internet traffic to go through the OpenVPN server but they are all done in Linux, all I want to know is how to add an entry to the route table ...
0
votes
2answers
167 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 ...
3
votes
3answers
217 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 ...
1
vote
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 ...
9
votes
3answers
609 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 ...
-4
votes
3answers
645 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?
7
votes
4answers
696 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 ...
2
votes
4answers
2k 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?
1
vote
1answer
46 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
votes
2answers
2k 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
votes
2answers
203 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 ...
1
vote
2answers
3k 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 ...
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 ...
0
votes
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 ...
4
votes
1answer
167 views

How do IP address to location services gather their information

My continued series of questions on IP addresses (ref Q1 and Q2). There are several IP address to location services. For instance: http://www.ip-adress.com/ip_tracer/ and ...
11
votes
5answers
480 views

Understand IP addresses and location

I risk posing an ill formed question here, but I'll give it a whirl. Does it generally stand to reason that the nearer IP address A is to IP address B numerically, then the nearer IP address A is ...
-1
votes
4answers
790 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
4answers
461 views

Why do I get different IP addresses when pinging the same host name multiple times?

I got three different IP addresses when trying to resolve a domain name three times. All three of these pings happened within seconds of one another. Is this normal? I wouldn't think DNS servers ...
4
votes
11answers
6k views

What is a good default IP address?

My company makes Ethernet devices. These devices have very little I/O. No keyboard, no video output. When the customer gets the device he must configure it for his network. I'd like to choose an ...
5
votes
4answers
614 views

MAC address spoofing - why doesn't this work?

So I'm in a new job, and they're pretty draconian about their network, hardware, and OS security. :-( I'm a web developer, but am forced to use IE7 for development simply because they don't want ...
-4
votes
4answers
293 views

Question related to Classful IP Addressing [closed]

Suppose we have two networks connected with each other by a router. One of them is using Class A prefix and the other one is using Class B prefix in IP address. The Question is how these two network ...
2
votes
2answers
1k views

Setting up a static IP address (public) in Ubuntu

I have a business class internet connection and need to setup a static ip address for a machine. I did a search online and only find how to setup static local ip addresses (like 192.168..). I tried ...
4
votes
2answers
648 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 ...
20
votes
10answers
18k views

Windows Server 2008: specifying the default IP address when NIC has multiple addresses

I have a Windows Server which has ~10 IP addresses statically bound. The problem is I don't know how to specify the default IP address. Sometimes when I assign a new address to the NIC, the default ...