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

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Linux: how to configure a secondary IP address upon boot-up?

Greetings experts, I've configured a nice little linux firewall machine here. It's got eth1 for the internal network (10.0.0.*), and eth2 for the external network (65.130.27.69/27). eth0 is not ...
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2answers
844 views

Some XP clients intermittently getting wrong IP for STATIC IP Server

We have a server with a static IP, let's say x.x.2.5. We have several WinXP (but not all) that will occasionally resolve the hostname to x.x.1.59 (x.x.1.x is the local subnet). The DHCP range in the ...
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4answers
91 views

Accessing networked computers by hostname?

I have computer with a host of DumbServer. When I try to connect to http://DumbServer or use DumbServer in Putty, it doesn't work. If I use the IP address, everything is fine. How do I set it up so ...
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2answers
2k views

Hosts file vs DNS for data center management

What are the cons and pros of using hosts files (updated via Puppet for example) vs DNS for data center machines management? I'm looking to switch from the tedious IP scheme, but concerned about ...
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3answers
181 views

interesting IP's?

I had seen a very interesting IP (something like 1.0.0.4) that was of some root DNS server and responded to pings, but I can't remember the exact IP. Anyone?
3
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3answers
381 views

only allow ip from australia

i want to only allow website visitors from australia. has anyone done this before?
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1answer
2k views

Duplicate IP address detection with multiple NICs

I am using arping -D to detect duplicate IP addresses within a network when setting up servers. (The network is controlled by someone else, and we have had many issues with IP allocation in the past.) ...
0
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1answer
2k views

angry ip scanner reports differnet hostname and computer name on a domain?

did a quick sweep of a network this morning and i am getting different hostname to computername in the list. this is a domain with a DC in there. it has active directory integrated dns. if you use ...
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6answers
33k views

Why was my ping answered by a different IP address than the one pinged?

While trying to setup a MSSQL clustering solution, I am running into a problem that is outside of my expertise that is related to networking. I was trying to find a free IP to used for my node. I ...
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2answers
12k views

How do I create a virtual IP address?

i am a student so i am pretty new at this but i am making a web cluster with two web servers so that if one server fails the website still stays up. my question is how do i assign a virtual IP address ...
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2answers
1k views

Public IP Routing over Private GRE tunnel

I have a GRE tunnel configured between two linux boxes. The tunnel works fine. I can ping from each host the other private ip. Head privateip: 10.0.0.1 publicip: 8.8.8.8 Tail privateip: 10.0.0.2 ...
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4answers
6k views

Apache 2: SetEnvIf “IP Range”

In my Apache config I want to set an environment variable if I see that the visitor comes from an specific IP range. Currently I do it this way: SetEnvIfNoCase Remote_Addr "^194\.8\.7[45]\." ...
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4answers
1k views

nslookup/dig differ from how a browser resolves a hostname

At my site, we just moved an important service, and made the appropriate DNS changes internally and externally to make it work. When you bring up the site in a browser, it works fine. (Works in ...
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5answers
107k views

How to route different traffic thru different network interfaces (in Windows)

I've searched for details on how to do this but I've been unsuccessful - I wondered if someone could offer up some advice. So, let's say I have 2 network cards (LAN and 3G in my instance), both ...
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2answers
148 views

How to ban a specific IP from my website?

I'm using Apache,hosted on Linux.
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2answers
484 views

DHCP IP address with a client specified DNS server? Is this against spec?

I have some embedded network devices that allow me to specify whether or not they use DHCP. Unfortunately, we have some clients that have less than stellar DNS servers in their networks and have ...
14
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4answers
22k views

How to make Postfix use another IP address?

I'm using the Postfix mail server and I have 6 IPs available. I'd like to use another IP for the Postfix mail server for sending mail than the web server uses. How can I do this? My postfix version ...
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3answers
8k views

NGINX how to redirect accesses by IP to access by host name instead?

Somehow, Google has indexed my site via IP address as well as by domain. E.g., 180.10.1.1/index.php as well as www.mysite.com/index.php I want to 301 all those ip address urls to the appropriate ...
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3answers
6k views

How to create a shortcut for a IP:port url?

I have a service running on a specific port on a given ip : 12.34.56.78:12345. The server at this IP address is all mine (but not the network, so no switch/router tweaking), and I also have a bunch of ...
1
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1answer
466 views

Sendmail Default IP

I'm wanting to set the default IP used by sendmail to send email. I've looked through sendmail.mc and through the options availible in webmin and just can't find the answer. Thanks.
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5answers
275 views

Cheapest hosting company that would give me lots of IPs [closed]

Any recommendation on hosting company that would give me lots of ips(/22,/23,/24,/25,/26) with a dedicated server and chopped it up into vps for me?
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3answers
1k views

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
480 views

How to get secondary nameserver

i was wondering how i can get a secondary nameserver with a different ip. I have a dedicated server, with already 2 IP adresses, but they are still on the same server. I need to have a IP adress on a ...
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3answers
127 views

Origin of Firefox traffic when running on a remote machine

When I connect to a remote host: desktop$ ssh -X user@remote and start firefox: remote$ firefox & I expect firefox to be run on remote and also all traffic should be sent to internet using ...
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5answers
46k views

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 ...
64
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6answers
495k views

How to determine the hostname from an IP address in a Windows network?

My LAN has 50 Windows hosts. At the Windows command line I try ping to get the IP address of a running Windows machine. The question is how to get hostname of a specific IP address in the same ...
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2answers
1k views

I need an outside ip address on a device inside my network

I'm working with a company with the following network - AT&T DSL internet access through a Netopia 3347NWG router serving DHCP to about 25 workstations; 192.168.1.0/24. They're getting a ...
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2answers
133 views

How to map something to an IP?

For starter, let me say that servers and stuff like that are really not my strong point, so I'll try to explain myself as I can because I forgot the name of the thing I'm trying to do. Let's say in ...
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6answers
2k views

1000 ip addresses

I need to get 1000 ip addresses and run virtual server per each ip address, what are the best options of getting so many ip addresses? Edit: I am currently located in US. One option is to buy VPS ...
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4answers
486 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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2answers
1k views

How do I setup a router to forward packets (to/from) a specific IP to a specific _hardware port_?

I would like to route all traffic to 192.168.1.10 to hardware port 1 on my router and all traffic to 192.168.1.11 to hardware port 2 on my router. The issue here is that I have a network attached ...
20
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3answers
31k views

How do I block specific IPs and IP ranges in IIS7?

I'm trying to block various IP addresses from every site that I have hosted from an server running Windows 2008 and IIS7. I've found various information about how to do this using Deny rules from ...
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2answers
196 views

How to assign IP to physical machines?

Excuse my ignorance, I want to know if its possible to setup untangle in ESXI such that it will be able to assign IPs to physical machines outside the ESXI box. Here is my setup: 1) Management ...
0
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1answer
331 views

What's a typical turn-around / response-time for this query/reply scenario?

I'm doing a feasibility study on a proposed wireless/wired network topology for a coming project of ours. A rough description of its use is "like an industrial sensor system". It looks something like ...
0
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1answer
558 views

Changing default openVPN IP in linux server

The problem is that we have a public OpenVPN service. Pay €9.95 and you get an OpenVPN account at currently half a dozen of servers for a month. This means there are always and will always be some ...
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3answers
62 views

Do services exist to offer relaying to and from long-term fixed IPs?

I have a number of Linux servers (dedicated and VPS) with their own fixed IP addresses. I would like to be able to acquire a set of long-lived IP addresses that could then be assigned to the servers ...
0
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1answer
1k views

Any way to filter IP's when logging queries? (BIND 9.3)

I would like to record queries to my DNS from a particular ip. Is this possible? Right now I have this: channel query_log { file "/var/named/data/queries.log" versions 2 size 1G; ...
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2answers
7k views

Can the same wildcard SSL certificate be used on different IP addresses and/or boxes?

Example: Wildcard SSL certificate for *.example.com installed on two different boxes. hostEU.example.com A 60.70.80.90 hostUS.example.com A 200.210.220.240 I assume this is a perfectly valid ...
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2answers
578 views

Restrict destination IPs from a WiFi connection?

I'm a developer and not a sysadmin, so I'm going to ask this question the best I can. I am working on a web application for mobile devices. Since it is in development, it is only available on our ...
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4answers
3k views

Make a process listen on 0.0.0.0 (or not 127.0.0.1)

Both boxes in question are RHEL5. I have a python RPC server running on localhost port 8000. When a client running on the same machine tries to connect, everything works great. When a remote client ...
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3answers
90 views

Changing web host

right now we host our website in an ISP which is also registers our domain. the company now is entering a mobile operator business which requires that the website to be moved to our internal network ...
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4answers
7k views

Workaround for blocking SIP port (5060) by ISP

I found out my ISP is blocking outgoing SIP port (5060) at home. I have a remote Linux server that I can use to listen on different port than 5060 and do the forwarding for the traffic. Not sure what ...
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3answers
850 views

Serve multiple servers from same ip address

I saw other questions about this that were similar, but not exact. So, my issue is, I have a home server that hosts my website and uses my outside ip. Well, rather my domain name directs to that ip. ...
138
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4answers
137k views

What's the difference between ip address 0.0.0.0 and 127.0.0.1?

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 what's 0.0.0.0? It ...
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4answers
5k views

How does a host route IP packets if it gets two IP addresses?

To clarify my question... I am wondering how does the Linux kernel route packets on a multi-home host? With 'multi-home', I mean the host has multiple NICs to send packets, for example my Debian in ...
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4answers
782 views

How to make website inaccessible by ip?

My site can be accessed from both www.mysite.com/ http://my.ip.add.res/ I would prefer only the first method. Can I prevent my website from being accessed by IP ? I am using Litespeed and I can ...
4
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3answers
10k views

How do I configure a subdomain to point to a different IP from GoDaddy

Simailar to this question, I want to configure DNS hosted with GoDaddy to have a subdomain on a different IP from the root site. The issue I am having is that GoDaddy uses a GUI and does not grant ...
1
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1answer
64 views

How to prevent access to a single file based on IP using .htaccess?

I asked this question at stackoverflow but I didn't recvie any solutions so I think the good people at serverfault may be able to help. All the resources I've read explains how to prevent access to ...
2
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3answers
355 views

how can i add another new ip to my ubuntu server?

i got a new IP for my server from my host. the server is already hosting one site. i got a range of IP. like 23.23.23.23~23.23.23.27 how can i add these ?
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2answers
1k views

How to get an IP un-blocked from the MTA spam lists !

We are trying to shift our corporate email server from our ISP to the rackspace cloud. Looks like who ever used the IP (that my virtual server was assigned) before has abused it for sending a lot of ...