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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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Drop fragmented packets in nftables

Using iptables is it possible to block fragmented packets with this rule: iptables -A INPUT -f -j DROP But there isn't a equivalent in nftables. There is any way to do it?
rfmoz
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Is it possible to configure HAProxy to listen on IPV4, but send the request using IPV6?

Trying to configure HAProxy to listen for requests on port ipv4(Port 80) but proxy the request through eth1 to a server using ipv6. The request must be show the ipv6 address for the request. We don't want to expose the ipv4 address. Is this possible…
Kladskull
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ping between ipv6 and ipv4 networks

I have 2 networks (one ipv4 and one ipv6) , I used ospf as routing protocol for both networks. I activate bgp between this 2 networks(R6 and R1) and now R6 can ping the full ipv6 network and R1 can ping the full ipv4 network. Now I want r7 to ping…
sara
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How to disable IPv4 use on OSX (Or disable Happy Eyeballs)

I have a OSX El Capitain (10.11.2) host that has only IPv6 connectivity. The network uses NAT64 and DNS64 to provide access to legacy IPv4 hosts on the internet. The problem is that when looking up a hostname most tools (at least Curl, and Ruby's…
Matt Hamilton
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Logstash - Graph IPv4 vs IPv6

I'm looking at starting to graph inbound connections to our various services (web, mail, dns etc) by IP version, ie IPv4 connections versus IPv6 connections. Currently the IPs are being stored in a single field. What's the best approach to…
Boden Garman
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How do I forward IPv6 to IPv4?

I am testing a LAN network that will be based on IPv6, but without IPv4 support, i cannot connect to other networks. Can I confirure a router to forward IPv6 requests from local network (LAN) to IPv4 network (WAN side). Also i would like to forward…
Marko Farkas
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End-to-Site VPN from IPv4 -Host to IPV6 (only) - Site

I want my IPv4 only Clients to my IPv6 only Site. I have a dualstack Server which I could use as a gateway. There is a Question somewhat related here: IPv6-only client to IPv6/IPv4 dual stack server tunnel? but was asked about 4 years ago. Is this…
Maximilian Kindshofer
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netsh command to add interface

I am working with Windows 2012 R2 Core and I having problems with setting up my NICs after they got reset. When I run "netsh int show int" it shows bother Interfaces as Enabled and Connected. When I run "netsh int ipv4 show config" it only shows…
Chris
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What interaction is required for a Windows server and Cisco router to setup and destroy a Multicast session?

I'm trying to understand how Multicast actually works, and have read numerous articles and Wiki pages, and have gathered this: A multicast address takes up state on the router of the membership, which is a scalability concern There are commands to…
makerofthings7
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How can I change metric of public network in route table

In my windows 8.1 ENT [64 bit] machine I have 3 network adapters. Ethernet 1 is connected to public network and other 2 ethernet adaptors are connected to different internal networks. The problem is in route table we have active routes like: Active…
Shruti Basu
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What constitutes valid justification for more IP addresses?

I host a small website with a well known VPS service. They provided me with one IPv4 address upon registering and said additional addresses would require justification. I requested one additional IPv4 address so as to have one for a production…
David
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Why doesn't this IPv6 listen directive also accept IPv4?

In my nginx (1.4.2) setup on Ubuntu 12.04, I have set up only one configuration file (I deleted/disabled the others): server { listen [::]:80 default_server; location / { root /home/lwood/websites/default/public; } } I have restarted…
lwood
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How to do dual stack IPv4/IPv6 with virtual hosts on nginx 1.4

I'm using nginx 1.4.1 (now, before it was 1.2.1) and would like to support dual stack (IPv4 and IPv6). I'm always getting duplicate listen options for xyz errors from nginx. server { listen 80 default_server; listen [::]:80 ipv6only=on…
burnersk
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Should I create a multicast route on RHEL/CentOS for a blind sender?

A CentOS 5 system does not appear to come out-of-the-box with a route for multicast traffic. What it does appear to do is use a default route, if configured. In other words, a routing table like this: # netstat -rn Kernel IP routing…
Mattie
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Server sending out packets bigger then MTU

I have a server that I am transferring data off of. We were having some problems that were traced back to the fact that the server is sending out jumbo size frames despite the fact that ifconfig is reporting that the MTU is 1500. How is this…
Gus E
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