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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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ICMP replies - ingress or egress interface (e.g. from a traceroute)

When a traceroute is initiated and receives an ICMP reply from the nodes, which interface should the be replying be from according to RFC 1812. they are actually replying from ingress (where they receive the packet) or egress (where the packet…
leviu
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nginx won't listen ipv6

I'm running a nginx server (1.8.0) and I want to listen both in ipv4 and ipv6. But even with the right listen statement (and a restart of nginx of course) a netstat -tlp | grep nginx return tcp 0 0 *:http *:* …
Dysosmus
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Force use of IPv6 address over IPv4 address

I'm attempting to serve a website from a machine that only has an IPv6 address. I have purchased a domain name and changed the AAAA record of the DNS resource record to my IPv6 address, and have verified that this change has been updated using…
user14717
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EC2 multiple outbound IP addresses setup

I've looked everywhere and haven't found a good solution to the following problem: I'd like to set up an ec2 instance with 2 public ip addresses, with 2 rails servers each using one IP address. They would accept incoming requests on their own…
Albert Peng
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Powershell - Sort-Objects, list of IP Addresses

I've got a /20 network and I want to know all used IP Addresses and their attributes like the MAC, the name and the description plus all free addresses between the used ones so that I got a long list where I can see if the address is taken or not.…
mushr00mer1990
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IPv6 servers and IPv4 client base

As IPv4 addresses are running out rapidly, a time will come when there will not be even single IPv4 address available for allocation. But, huge number of devices will still be running on IPv4. However, if someone wants to launch server in that time,…
Atul
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Logging the outgoing port for IPV4

I need to become an IPV4 and IPV6 expert in a couple of hours. Our company is being bullied by the internet legislator in our country to move fast to offer the site in IPV6 only (we are just content providers, not a ISP or the like) The demand that…
Draconar
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Should we accomodate a customer asking us to NAT servers behind new PUBLIC IPs within a VPN?

We're a SaaS provider, setting up a IPSec VPN between our data center and a customer's site so they can directly access their hosted database server from their LAN. Instead of exposing our internal LAN range to the customer, our 'reference design'…
doza
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Dell VRTX get ip address of server attached to chassis

I wanted to know if there is any racadm command to get the ip address of the attached server's in a dell VRTX chassis. racadm getslotname will give the Host Name of the server but not the ip address. Thanks in advance.
ayush
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IPv4 header vs IPv6 header size

Just wondering from looking at that picture if Total Length = Payload Length and the IPv6 header is bigger, does that mean IPv4 packets can contain more data?
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CentOS, ifdown on virtual interface removes IPv6 addresses on physical interface

In CentOS 6.4, when using 'ifdown' on a virtual interface, the IPv6 addresses configured on the physical interface are also removed. I expect only the virtual interface to be changed. How can I prevent 'ifdown' on a virtual interface from affecting…
stephen.z
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FreeBSD Nic Setup - Dual NICs with lagg

I have a server running FreeBSD 9.0. It has two NICs using the igb network drivers. I was given a range of IPs, for example's sake I'm just going to make up some IP addresses, so let's say 192.168.0.24/29 with a broadcast ip of 192.168.0.31. The…
Drazion
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How can I get unique IPv4 and IPv6 visitor counts on nginx access.log in shell?

How do I get some stats on unique IPv4 and IPv6 visitors by looking at a nginx access.log with UNIX CLI? I use the standard combined pre-defined format for access_log.
cnst
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Routing not working with OpenVPN

I'm trying to setup an OpenVPN server on Debian 6.0.5 (installed via apt) but I'm stuck with routing problem. This my network configuration: Client <-> Router+Firewall <-> OVPN Server <-> Subnet A AND Subnet B 172.17.17.6 …
DJYod
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IPv6 very slow while IPv4 not on same server

I have a development and a production server, both running CentOS, on the same network with similar configurations. On one (the production server), when I do a curl, it attempts IPv6 first, but that times out after around 45 seconds and falls back…
Dave Shepard
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