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

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30 views

How to get list of all the hostname / DNS of the Linux box

I have a Linux box and I know I can get the list of IP addresses assigned to that box using following command /sbin/ifconfig -a but how to I get the list of hostnames / DNS for that Linux box using ...
1
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1answer
1k views

XenServer - VMs to access Internet, but should not be visible from the Internet

I have installed XenServer on my server at the Hetzner datacenter. I have bought an additional /29 subnet containing 6 usable IP addresses from them. I want to install more than 10 VMs on this server....
0
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3answers
42 views

Connecting my domain name to my droplet [closed]

I setup an Apache static website on a DigitalOcean droplet. The company that hosts my domain name (webhostingpad) provides an "Advanced DNS Zone Editor" which I used to setup a (redirect/forward?) to ...
0
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1answer
35 views

Possible to announce IPs through AWS?

I'd like to have additional IPs with my EC2 instances so I'd like to lease IPs from a 3rd party since Elastic IPs seem to be far more expensive. This would require me to announce the IPs. Is it ...
7
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7answers
49k views

Why does a VLAN have an IP address?

A dumb question for the majority, but I am interested to know "why does a VLAN have an IP address?" Is this address different from the default gateway? Or is this address, same as broadcast address ...
0
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1answer
28 views

Trying to figure out why nslookup is giving me two different IP addresses

I'm pretty new to the world of computer science and ran into something that I'm having trouble understanding: I have this homework assignment asking me to list the IP address produced by using the ...
4
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5answers
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 /etc/...
0
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2answers
2k views

Interface IP address is removed automatically on CentOs running inside VirtualBox

I have CentOS 6.4 on which i am running virtual box. Inside virtualBox i have CentOS based VM which works perfectly fine. The NAT and HostOnly interface have assinged IP Addresses through DHCP and ...
3
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1answer
2k views

DNS errors after changing nameservers for Cloudflare

I don't know if this is the right place for my question, but I have a problem with my DNS/nameservers after changing the nameservers. I'm not sure if it is a problem at my side or at my webhost. I ...
1
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0answers
34 views

linux missing /etc/network/interfaces path/file [closed]

I need to change my ip address.. but it seems the path /etc/network/interfaces is not on my system.. can somebody help me on this? /etc/network/interfaces: No such file or directory
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1answer
20 views

Can ip address and gateway be the same and can number of clients be increased by changing the subnet mask? [closed]

So I am a newbie just learning networking and was wondering if gateway can be same as the allocated IP address. Also, if I have to increase the number of users that connect to my router (having ...
1
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1answer
86 views

Output IPaddress of VM using ARM template

Have a ARM template (https://github.com/jmspring/arm-template-neo4j-docker/blob/master/azuredeploy.json) which will launch a instance and assign a public IP. here i need to print the IP address as ...
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2answers
212 views

How to assign a static IP address to windows 10 machine at boot time? [closed]

I want to assign a static ip address to a windows 10 virtual machine at booting time. How can I do it? For example, as in linux we can modify /etc/network/interfaces file so is there any similar way ...
4
votes
3answers
642 views

Can only some machines on a network have a public IP addresses?

Is it possible for some computers on a network to have their own public IP addresses and serve content over the internet while other computers on the same network only have private IP addresses but ...
0
votes
1answer
57 views

Looking for IPs by page visited in apache log (awk?)

I have a bunch of apache access log files and I want to know which IP addresses visited my /contacts folder. How can I collect them from all log files with shell command?
7
votes
4answers
29k views

Can I use nmap to discover IPs and mac addresses?

When I need to locate the IPs of devices by their mac address on a Windows system, I normally use Advanced IP Scanner (from radmin.com) to scan the network, then I use arp -a to list the mac addresses....
17
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17answers
63k views

Shell Command for Getting IP Address?

Is there a bash command to find the IP address for an Ubuntu box? I need to find the IP address so I can ssh into the machine later.
1
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1answer
41 views

Block IP Address range on IIS 7.5

I have a Windows 2008R2 Server running IIS 7.5. It is getting bombarded with attempted hacks from similar IPs. How would I block the IP range with something like 51.255.65.*? Below is the UI ...
2
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1answer
143 views

Pinging Hostname results in reply from 2 different IP addresses

I have an odd behaviour on my Windows 2008 R2 server, when I ping a hostname of another system, my first reply has a different IP address then the following replies. For example, if I was to ping ...
3
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0answers
46 views

How to view the IP of the connecting client in Domino 9 IMAP server?

I am running an IBM Domino 9.0.1 (64-bit) server on a Windows Server 2008 R2. The problem is that the IMAP server task is not displaying the IP address of the connecting client in the console and log....
0
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1answer
49 views

Change one IP without disrupting connections to second?

I have a CentOS 6 box that has two IP Addresses on one physical interface - One the IP assigned to the interface via the netconfig scripts, and the second a "virtual" IP assigned to the same ...
6
votes
3answers
638 views

ntpd gets “connect: invalid argument” on 0.0.0.2

It appears the reply for pool.ntp.org changed recently. This is making my CentosOS 6 ntp servers unhappy. $ host pool.ntp.org pool.ntp.org has address 0.0.0.2 pool.ntp.org has address 83.209.8.142 ...
5
votes
3answers
20k views

SSL certificate for a public IP address?

I just tried buying a Comodo Positive SSL but it was rejected due to not supporting a public IP address, but instead they only support a domain name. Does anyone know any SSL certificate provider ...
5
votes
3answers
113 views

How does a router on the Internet know where to send a packet to next to get it towards its destination IP address? [closed]

I've been doing small-time freelance IT work (among other things) for about the last decade now. I've set-up or rebuilt more local network arrangements than I can care to count, and more recently I've ...
0
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0answers
27 views

Proxy for automated browsing on mobile networks

I am interested in building a website scanner which needs to act as if it is a user agent on a mobile network (e.g. Verizon LTE connection in the US, Movistar LTE connection in Spain, etc.) Aside ...
9
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1answer
27k views

How are cellphone IP addresses assigned?

When my cellphone accesses a website via the tower and its GPRS gateway, NAT ensures that the sites receive a public IP. Would all phones using a single tower have the same IP? If yes, then how can ...
4
votes
4answers
732 views

In Linux, how can I automatically assign an IPv6 address to an interface based upon its IPv4 address at boot time?

On a CentOS 6 machine, I have a server with 2 NICs, eth0 and eth1. eth0 has address 192.168.0.1. I would like to create a script that parses the IP address of eth0 and assigns a similar-looking IPv6 ...
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votes
1answer
30 views

What is the global attribute of a network interface?

I saw the following line of code in a code repo I work on: ip addr | grep 'inet .*global' | cut -f 6 -d ' ' | cut -f1 -d '/' | head -n 1 I want to understand what does the "global" attribute mean ...
1
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1answer
28 views

Use ip address for name server and have it dedicated to a single site

Ok so I think I have this setup right but I just want to be sure. I have 3 IP address: 1.1.1.1 also known as ns1 2.2.2.2 also known as ns2 3.3.3.3 also known as ns3 They are being used as ...
4
votes
3answers
4k views

Where can I find a list of IP addresses of hosting providers?

I am attempting to fend off a spam attack against a web api I run and would like to obtain a list of IP addresses of public web hosting providers from which spammers are launching their attacks. I'm ...
0
votes
1answer
149 views

DHCP in router with AD, DNS and DHCP in one Server

My Lan is working fine 5 switches connected to core switch and have a router, DHCP configured in the router, network 10.10.10.1, 10.10.11.254 -- Mask 255.255.254.0 -- d.g 10.10.10.1 (Router IP).DNS 8....
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4answers
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How does a computer obtain an IP address via DHCP?

How does the computer know which device on the network to query? How does the default gateway factor into this? Pretty much, what is the chain of events that occurs when a computer tries to obtain an ...
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3answers
1k views

Bind an ip address to Postfix as outgoing ip

Is that possible to bind all available public IP addresses on a server to one Postfix instance as its outgoing IP address pool and let it choose a random IP address or specified IP address from the ...
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2answers
2k views

IIS6 is leaking IP address in header

We are working on obtaining PCI compliance for our e-commerce website with securitymetrics.com One last item that keeps coming up is as follows: Synopsis : This web server leaks a private IP ...
0
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1answer
81 views

What will happen in a network if multiple devices have the same MAC address? [closed]

What will happen in something like a wifi connection where different laptops are set with the same MAC address . To make it more interesting what will happen if there are multiple devices with same ...
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2answers
82 views

Difference between connecting from inside and outside a subnet [closed]

Let's say provider granted me IP addresses 10.20.30.1 - 10.20.30.254, so the subnet address is 10.20.30.0 and mask 255.255.255.0. I set my router to 10.20.30.1 and computers to 10.20.30.2 and higher. ...
0
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1answer
63 views

Prevent AWS load balancer serving on IP address

I've configured a Amazon Webservices Load Balancer for my site. It's all good the domain name resolves to the IP address of the Load Balancer Endpoint, and on the internal LAN it communicates with my ...
2
votes
2answers
1k 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, ...
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2answers
702 views

Multiple internal IP's running on one external IP?

My ISP has given me 1 static IP address, however, I need to run multiple internal IP addresses (from VPS's) under that 1 public IP address. I have enough network connections to my router, but not ...
4
votes
1answer
417 views

Caching DNS server returns invalid ip address for external lookups

I'm trying to resolve a DNS issue and am running short of ideas. Google doesn't seem to be helping, either. When I use my local caching name server to resolve external host names, it always returns ...
1
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2answers
228 views

How do I connect to my libvirt/qemu/guests ? (with no ip address)

I have inherited the administration of a trusty ubuntu server with several virtual servers, also ubuntu using libvirt and qemu. I have the problem I cannot connect to these virtual servers/guests. ...
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votes
1answer
34 views

Webmin - Disallow access by IP [closed]

I have installed a Webmin instance. I can access by both domain:port and ip:port. Is there any way to restrict access to an specific domain name and disallow direct access by IP?
1
vote
2answers
68 views

Why are 093/8 IP adresses in both US and Europe?

According to this page of the IANA website, the IP addresses 093/8 are allocated to RIPE NCC (European network). However, when I use websites to locate IP (like this one), they tell me that 93.184....
16
votes
2answers
2k views

In the output of `last`, what does suffix “.d” after an IP address mean?

In order to find out who was logged in recently on my server I am using the command: There were logins from very strange IP addresses e.g.: username@pc:/home/user$ last username pts/16 59.224....
4
votes
1answer
6k 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 192....
1
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1answer
967 views

LAN->LAN IP translation (for TortoiseSVN + Artifacts + Buffalo router)

Here's my scenario: I've got a VisualSVN server on my main dev box @ home. I'm also using Visual Studio 2010, TortoiseSVN, VisualSVN client (for source control), and Versioned 'Artifacts' (for bug ...
0
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1answer
38 views

request ip from dhcp

I'm automating a deployment on a vmware esxi host using some custom shell scripts and I would need to know in advance the IP this VM is going to get from a DHCP prior to it being installed. I know ...
1
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1answer
122 views

Windows Dual NIC - Will this setup cause an ip address conflict?

My company has three subnets total of which two subnets have the same set of ip addresses... 192.168.0.x. This has not been an issue before but we are going to establish a VPN connection between two ...
1
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1answer
126 views

How to get the internet facing IP address of a Windows VPN client?

We have a number of users VPNing into a Windows 2012 server. Using VPN provided by Routing and Remote access on Windows server. Mostly this works fine, but I have one or two users who sometimes ...
0
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0answers
24 views

Need Help Connecting Two VOIP Devices?

I have two Motorola XPR 8400 two way radio repeaters. These repeaters are capable of voice over ip. These two repeaters will be placed at two different sites with different ip addresses. I need to ...