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Questions tagged [ipv4]

Refers to the 4th revision of the Internet Protocol, where addresses are usually displayed in the form of dotted decimals between 0-255. Ex: 169.254.0.1

The IP address of a device is its unique identifier on a network which allows communication with that device.

Given the fact that only 2^32 IPs are available, number which is already depleted, its successor (IPv6) has officially taken over on 6 June 2012.

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Docker will only bind forwarded ports to IPv6 interfaces

Is there a way I can tell docker to only bind forwarded ports to IPv4 interfaces? I have a machine running on Digital Ocean with IPv6 disabled: # echo '1' > /proc/sys/net/ipv6/conf/lo/disable_ipv6 # echo '1' >…
Mark L
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What determines whether the FQDN is interpreted as IPv6 or IPv4?

When I type a Fully Qualified Domain Name (FQDN) in my URL bar, the browser connects to some mapping table (where is this table stored? with the service provider?) that determines where the file requested is hosted. So, it depends on the service…
Lazer
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IPv4 Properties Settings for servers on an isolated network?

I have a question related to servers which will not have any outside internet connection. The topology is very simple : I have an example IP address of 10.10.10.10 for the server and the workstations which have IP addresses 10.10.10.30 and…
MFerguson
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American Users have wrong IP address geolocation

In order to display the right content for my users I get their country based on their IP address. I have been receiving several reports from American users saying that the content is being displayed incorrectly. I always check their IP address and…
fpg1503
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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 IP addresses. An address conflict with the…
proski
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Multicast hostname lookups on OSX

I have a problem with hostname lookups on my OSX computer. According to Apple's HK3473 document it says for v10.6: Host names that contain only one label in addition to local, for example "My-Computer.local", are resolved using Multicast DNS…
KARASZI István
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No IPv6 & DNSSEC support on cc-TLD? (practical implications)

I'm needing to register some domains that have country code domain extensions, but noticed that those TLDs do not officially support (A) IPv6 or (B) DNSSEC... What limitations or pitfalls should I expect to run into because of this? (A) No IPv6…
Old McStopher
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How to disable ipv6 support in Linux entirely?

We are currently setting up a some local network servers to run in a full ipv4 network. I can be sure, that this network don't have ipv6 support, and never will. Next to that, partially because of a command from higher organisational…
user266008
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Can a global IPv6 address be NAT'd to an internal IPv4 address at a firewall-level?

As an organisation we've just requested our first IPv6 allocation. At present we are a wholly IPv4 organisation with a global IPv4 address allocation configured on our edge router and used (predominately) to NAT via an edge firewall to internally…
Matthew
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IPv6 / IPv4 Third Form conversion?

I'm reading about how to configure IPv6 on Ubuntu, I've gotten to the section about Reading IPv6 Addresses and though the first two examples make sense to me, the last one escapes my grasp a bit, as it's been a few years since my last networking…
leeand00
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Networking Question - What is a VALID Subnet Address?

Possible Duplicate: How does IPv4 Subnetting Work? I am currently revising Networking for the Cisco CCNA1. One of the questions that I am struggling to answer is the following: Which of the following IPv4 addresses are vaild subnet…
Phil
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Can the network still work when DNS & DHCP go offline?

In my LAN I have a Windows server and a Synology NAS for storage, directly attached to the server and provided as storage to the clients through a VM. The server provides the domain controller, the DNS server for the main VLAN and the DHCP server…
aardbol
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Disable IPv4: What exactly does 'ifconfig eth0 0' do?

I'm experimenting with Linux and networks. What I'm trying to do is disable IPv4 for remote connections. It shouldn't be that complicated but I didn't find much about this topic. However, there is one solution which seems to work. I cannot remember…
j0ker
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IP Address keeps getting assigned that is already in use

I have an internal IP Address (192.168.0.57) that every couple of days will get assigned to a machine which will then periodically lose it's connection to the network throughout the day. The first machine that this happened to was running OSX and…
Kalamane
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IPv6: the end of NAT?

Possible Duplicate: Switch to IPv6 and get rid of NAT? Are you kidding? Is NAT going to disappear with IPv6? What about during the "transition" from IPv4-IPv6? How are we all going to access the internet then?
Arturo
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