I currently have 1 static IP registered on my server. I’d like to go ahead and register 4 other static addresses. I’m not sure of the syntax. Should I just do iface eth0:0 inet static? Here’s what I have now: auto lo iface lo inet loopbackauto eth0 iface eth0 inet static address xxx.xxx.xx.xx netmask xxx.xxx.xx.xx gateway xxx.xxx.xx.xx broadcast xxx.xxx.xx.xx auto eth0:0 iface eth0:0 inet static address xxx.xxx.xxx.xxx netmask xxx.xxx.xxx.xxx broadcast xxx.xxx.xxx.xxx Don’t add more gateway [...]

Our servers (all CentOS) are all restricted by IP but often i am out and about and stuck on a dynamic IP address. Using a DynDNS widget I have set this dynamic IP to always sync with a DynDNS hostname but how should i go about making this resolve to an IP in hosts.allow. For the moment i’ve written a cron script that runs every few minutes and checks the IP assigned to that hostname [...]

I’m using an elastic IP for one of my EC2 instances. I can reach the instance via the elastic IP from external machines, but from other machines in my EC2 configuration, I can ONLY reach the machine by its private IP. How can I fix this? I want my other EC2 instances to have a static reference to the machine with an elastic IP, so that if that private IP changes, I don’t have to [...]

I need to assign static ip address to a network with the following specification: There are 6 set(12 nos.) of sub-networks. Each set has a Primary and a Redundant network loops with Server having Win-2003 server and clients with Win-XP Now I need the best ip config for a connection that makes the communication in-between all 6 network clients and servers. Also I need to learn regarding what the 4 fields in ip are for, [...]

How can two hosts with different network-id communicate with each other? 10.17.101.16 /24 needs to communicate with 10.17.102.16 /24 I was able to make communication by changing them to same network-id by changing subnet mask. But is it the only way to make communication possible? If they’re on the same segment then changing the subnet will work but it brings the question of whether that segment was subnetted correctly in the first place. If they’re [...]

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 “page not found?” thanks in advance I’m assuming that you’re referring to The DNS record that resolves to your web site address. If that’s the case then here’s my answer. It’s slightly different from the answers [...]

I purchased a dedicated static IP address from my hosting company to host my domain name. The IP will point to me domain when I ping it. However, when I conduct reverse DNS lookup, my dedicated IP points to somewhere else – other domain. when I check with the tech support, they said that they are not able to change that because the domain belongs their data center. Are they telling me the truth? As [...]

I dont know if this is the correct place to ask this question but here goes .. (please note that I am pretty much a newbie in terms of networking and I work primarily on the windows platform) I have been working on accessing and consuming some web services in C#/ASP.Net, these web services that I consume are IP restricted. Currently they allow access only from my work network (we have a static ip set [...]

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 connection) will want to pull these back or in some other way charge us a lot of money to keep them? If so, what I can do right now to make sure we don’t have problems here [...]

I’m looking to get a cheap (low end) server to serve web pages (xHTML/PHP), but I also need to be able to set up PostGreSQL on the system too. Ideally the server would have low power consumption, run Linux (I prefer Mac OS X but a Mac Mini, although the size I’m looking for, is too much money!) and be around £100 (~$160US). EDIT: Just to make it clearer, I’m looking to purchase the server [...]