IP - Internet Protocol, the most commonly-used set of rules for dispatching data across a large computer network.

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ip address scope parameter

In Linux, the command ip address add [...] has a scope argument. The man page says that the scope is "the scope of the area where this address is valid". Follows the list of legal scopes: global ...
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7answers
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Static IP Address assignment vs DHCP address assignment

I manage a small-ish network that consists of less than 70 nodes. The previous system administrators opted to have a dhcp server and manually set dhcp addess. I have opted to rather use dhcp ...
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Finding ALL currently used IP addresses of Website [closed]

What steps would you take to discover all (or close to all) IP addresses that are currently used by a website? How would you be as exhaustive as possible without calling a website admin and asking ...
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5answers
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Best way to use large IP blacklist to deny access to a web server?

Is there efficient and easy way to use IP blacklist (like this one, but perhaps 2-3 times larger, which can't be simplified to CIDRs much) to deny access to a web server (either lighttpd or Apache) ...
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1answer
1k views

Public and private hosts in the same BIND zone

For my particular setup, I've got control of a BIND 9 zone file for, say, example.com. There are several hosts in this zone, such as www.example.com and mail.example.com. I want the public internet ...
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2answers
949 views

Datacenter IP Addressing and DNS Management

We are setting up a small Datacenter, about 300 amps power and max 50 racks, I have studied networking mostly Microsoft and Windows based systems , but I do not understand the IP addressing, DNS ...
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2answers
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Nginx - How to redirect users with certain IP to special page

I run quite a big image gallery and there are 5 visitors that create an enormous amount of traffic by downloading the whole site every day using webcopiers. Those visitors have static IPs as it seems. ...
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3answers
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Changing netmask from /24 to /16 on a Windows 2003 domain

I have a Windows 2003 domain using 192.168.0.0/24 with all static addresses (no dhcp). I want to move to 192.168.0.0/16 because we need more addresses. I understand that we need to change netmask ...
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4answers
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Specifing ip address for outbound connections on a multi ip host

one of my servers (Debian 5.0.6) has two public ip-address on the same interface. This used to work well for months but suddenly it is using "the wrong" ip addresses for outgoing connections. This is ...
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3answers
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Routing WIFI and LAN for specific traffic

I have two network devices aboard my macbook pro: WIFI (en1): Used for general traffic. Connects to an ip of 192.168.19.* via DHCP LAN (en0): Used for specific traffic. Connects to an ip of ...
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2answers
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Cisco Router - Website Doesn't Work Locally Because Public IP Directs to Router Itself!

I have an RV220W but this issue may apply to other Cisco routers. My website is deployed at public IP address 123.45.67.89/MyWebsite/Default.htm. My web server has an internal IP to which port ...
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2answers
843 views

Xen host and guest sharing same IP

Is it possible for both Xen host and Xen guest to share same IP (albeit with different ports)? We have a single public IP, and want to have both the Xen host (as host only, no other role) and the Xen ...
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4answers
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openVPN and multiple external IP addresses

I currently have an openVPN server with multiple external IP addresses. I'd like to have all VPN connections (tun0 interface, and/or 10.19.88.xx IP range) to take the 2nd external IP address as ...
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4answers
3k views

Is a Network Switch IP-Aware?

I have some very trivial basic questions about networking, but I find varying information on that, so I just wanted to settle this. As far as I understand a Network Switch handles traffic ...
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5answers
3k views

hosting IP change, how much downtime to expect?

i'm moving my hosted site (same host) to a static IP, I understand there will be some downtime due to DNS caching - does anybody have any tips how to minimize this time and to avoid my users seeing ...
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2answers
471 views

OpenVPN: How to mitigate path MTU issues on a per-client basis?

We have dozens of embedded devices installed at customers, all calling home to our OpenVPN service. That works fine in general, but a few of our customers have severe path MTU issues. Our influence on ...
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1answer
775 views

iptables preroute localhost

I would like to forward all incoming traffic from a certain port to another one using iptables. The problem is that prerouting doesn't work for traffic from localhost. This topic suggests a solution: ...
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2answers
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IP Range for internal private IP of Amazon ELB

I'm trying to find out the range of IP addresses that an Elastic Load Balancer could have from an EC2 instance which is behind it. This is so I can configure the HttpRealIpModule of nginx correctly. ...
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4answers
423 views

IP addresses and geographical locations

A colleague of mine asked whether IP addresses could be "approximated" to physical location. As with most IT questions, "it depends" was a response I used frequently. Is there a service or program ...
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5answers
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How to extend IP Range from 192.168.1.1 to 192.168.2.254

Here's my question. I currently have a network setup to have Static IP manually assigned between 192.168.1.1 and 192.168.1.99 and the rest (192.168.1.100 through 192.168.1.254) assigned automatically ...
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votes
3answers
1k views

Resolve the same DNS name to different IPs depending on client IP network

Is it possible to setup DNS server (Win2k8) thus the same DNS name (an A record) is being resolved to different IPs depending on some option. E.g. example.com for clients from 192.168.0.0 to ...
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3answers
10k views

Adding a second IP to Debian Server

I was given a second IP by my server provider. I am running Debian 5.0. I thought I knew how to add the IP to the system and configure with apache, but I have not yet been able to. The primary IP ...
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2answers
3k views

Getting VirtualBox+Windows XP to view my Mac's localhost while offline

I'm running Windows XP via VirtualBox on my Mac. I want to load up sites on my Mac's localhost while offline. I know that I can append my IP and a nice domain name to the host file in ...
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1answer
3k views

Setting the IP address that the SMTP service uses in Windows Server 2008

My ASP.NET application running in IIS7 on Windows Server 2008 needs to send email. I added the SMTP feature to Windows Server 2008. The problem is that my server has multiple IP addresses and I ...
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2answers
2k views

Dig vs Whois on Nameserver Update and Reference to Unknown FQDN?

After running a dig on an old domain name moved from an old server to a new one, completely different IP and provider, I ran a dig and found that the listed nameserver does not match the one in the ...
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3answers
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D-Link Router “Virtual Servers” with 0.0.0.0 IPs [closed]

I recently erased all of the Virtual Server rules from a D-Link router and added just the ones that I needed (for example I don’t need DNS or NetMeeting, etc.) You can see the defaults on the ...
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2answers
394 views

Embedded device configured with bad IP address, can I still connect?

We have an embedded device running Linux (2.6.?) that can no longer be accessed over Ethernet. Someone in the field gave this device the following bad settings to its ethernet interface: IP: ...
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1answer
1k views

max number virtual IP addresses per NIC

How many virtual IP addresses are allowed to be added per network card? I am running a Linux OS.
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3answers
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Windows Server 2008 Ignores Persistent Route With Lower Metric

I have three Windows Web Server 2008 SP2 machines on a 10.100.20/24 subnet. I need to setup a persistent routing rule so that outgoing traffic to the same subnet goes through a hardware load balancing ...
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2answers
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Redirecting to the IP of an amazon EC2 instance

As you know amazon EC2 instances get an address like: ec2-72-44-40-153.z-2.compute-1.amazonaws.com If I have the domain example.com, is there any way that I can make bob.example.com or preferably ...
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3answers
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Are there simpler ways to do traffic shaping in linux besides tc?

I read lartc but I don't feel I need such a complicated solution for simple needs. One of such simple use cases is to limit a specific process' available bandwidth, upstream or downstream. How can I ...
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1answer
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Heartbeat Pacemaker 3 node/ip failover

I have setup two node active/active ip failover with heartbeat and pacemaker following the link at zivtech on the two load balancers for the backend web servers. Two LBs has public ip each which is ...
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1answer
419 views

Does ESXi 5 have a “routed IP” feature like Xen?

I have a dedicated server that I would like to use ESXi 5 on. I previously had Xen and it worked great. Initial network configuration was a bit confusing. The problem I have is the hosting company ...
3
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3answers
131 views

DNS Nameserver forwarding?

We currently have a number of clients that are pointing their domains at our old nameservers, for this example they are: NS1.OLDDOMAIN.COM NS2.OLDDOMAIN.COM We have moved the server to a new ...
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2answers
929 views

Multiple IP addresses assigned to one KVM VM

System: OS: Debian 6.0 64-bit with KVM installed from packages KVM is managed with Cloudmin 6.4.kvm I have a /29 subnet from my host. The bridge is setup properly for each VM to have its own IP, ...
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3answers
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Ubuntu only allow incoming access from 192.168.0.0/8 or server IP address

How can I make it that only approved IP addresses have access to my Ubuntu server 12.04 I only just set it up.
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2answers
1k views

Does Varnish support IPv6?

Their specification draft says they should on section 3.2.1. Are we there yet? Has anyone used Varnish with IPv6?
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3answers
3k views

Multiple VPN Connections, One IP?

In my office, we are working off one IP address currently, and this lets us connect a single computer to one of our client's VPNs, which effectively locks out multiple people from working with that ...
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2answers
469 views

Extending a subnet

We currently have a private IP subnet using the 192.168.1.0/24 range. We are running out of IP addresses and would like to extend this subnet, to something like 192.168.0.0/21. Is it possible to do ...
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3answers
159 views

Webserver Hosting Location

We're entering into the european market and i have a question about hosting our .eu site. I know the IP address of the domain can affect SERPs, but I dont want to have a different server because it ...
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2answers
2k views

What are the differences between Floating IPs and Virtual IPs?

This might be a pedestrian question but what is the difference between a "Floating IP" address and a "Virtual IP" address? Are they synonyms?
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1answer
421 views

Passing Client IP across Multiple Proxies

I have a load balancer in front of an Apache httpd server, which in turn is in front of a server running Tomcat6. We're using Tomcat to running Shibboleth's IdP. The follow looks like this: Client ...
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1answer
981 views

Junos: find out each interface's ip

Sorry if my explanation is confusing. I need to get all the ip addresses of a Juniper Switch and Router (different models). On Cisco IOS I can get that with show ip interface brief | exclude ...
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2answers
258 views

Static Routes and the Routing Table

This is very much a learning question if someone would be happy to explain a couple of concepts. My question is - the default routing table that exists in, in my case, a default Windows 7 install, ...
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1answer
150 views

confronting other orgs using public ip's internally

A company that we deal with has their internal network numbered with 120.1.254.0/24, specifically a mail server. That IP range belongs in China, causing all of their mail to be flagged as suspicious ...
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4answers
368 views

Different Routes For The Same DNS

I don't know the right term for this concept. But basically, I just want to reroute internal traffic to go directly to a server within the network instead of going around the internet. The domain have ...
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1answer
618 views

How to add IPs to a CentOS Server?

I wanted to know how to add the Prefix, the usable range & the subnet mask. I'm a completely new to this field so I would need step-by-step instructions. Thanks in advance. Regards, Netizen P.S. ...
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3answers
247 views

Is there a way to have all virtual servers use the same SSL certificate without having multiple IPs?

Is there a way to have all virtual servers,in Apache, use the same SSL certificate without having multiple IPs? I know that you can use a certificate on one site, per port and per IP, but can I make ...
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1answer
885 views

One IP for multiple SSL sites? [duplicate]

Possible Duplicate: Multiple domains with SSL on same IP We are planning to host Magento websites in a dedicated server. Is it possible to host ~40 Magento websites per dedicated server. ...
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1answer
1k views

Connecting to a KVM guest OS in Ubuntu

I am lost on this. Basically I am trying to set up a Ubuntu Server 10.10 as a virtual machine by using KVM. Everything went smoothly and I can even sudo-apt get packages from the guest OS. Now, ...