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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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how to 2 ip virtual in public dan private with forward to different destination

Here my case, Server 1 public IP in 1 box (eth0) -> 203.x.x.55/28 and 57/28 gw 203.x.x.49 private IP (eth1) -> 10.10.8.1 Server 2 private IP in 1 box (eth0) -> 10.10.8.5/24 and 7/24 gw 10.10.8.1 Iptables -A PREROUTING -d 203.x.x.55 -i eth0 -p tcp…
Pathic
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Cannot browse ipv4 websites (OpenVPN )

I have set up an openVPN tunnel on my VPS (OpenVZ - Ubuntu 12.04). The problem is when I'm connected to the vpn, I can only browse websites which support ipv6 like google. Ipv4 sites aren't loading (no error, just waiting…
jitowix
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Setup IPv4 local on IPv6 VPS

I have a dedicated server running multiple IPv6 only OpenVZ containers. I want them to be able to communicate with the IPv4 internet, but I realized that isn't going to be possible with IPv6 only. So they need to have an IPv4 address as well, not…
Nik Barres
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IP testing tool similar to wireshark website

I am looking to implement a tool similar to the one linked below on my personal server/website what are the steps I would need to get started? http://www.wireshark.org/tools/v46status.html I understand that I will need two seperate domains for…
hinekyle
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Apache2: Dual Stack mode IPV6 / IPV4 for existing IPV4 hostings

I'm planning to run my hostings in the IPV4/IPV6 dual stack mode for a lot of hostings / IPs. Short Apache example: ports.conf Listen 199.192.201.82:80 NameVirtualHost 199.192.201.82:80 Listen [2607:ff50:0:21::2]:80 NameVirtualHost…
Kevin Häfeli
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How many possible IP ways to interpret 1 IPv4 address (including masks)?

Considering subnet masks, how many ways can 1 IPv4 address be interpreted?
T. Webster
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SMTP - Remove IPv6?

We're doing a "try-out" of SmarterTools SmarterTrack (help desk) software. We can't get it to send email. We showed someone at SmarterTools our log - SmarterTrack keeps its own SMTP log - and they said it's because we're using IPv6, which…
Julie
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Is there an Infinite Number of QR Codes?

QR Codes seemingly are becoming more commonplace in the world today. I, myself, am probably one of 3 people worldwide without a smartphone thus unable to use a QR reader. The convenient possibilities in QR codes seem endless as I've seen them on so…
Christopher Chipps
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What are my usable IPs?

I bought the IP address block 216.231.128.32/27 and the machine has the Default Gateways already setup as 64.79.102.162 and 64.79.102.193
Aidan Knight
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Sorting IPv4 Addresses

So I've run into a quandary on sorting IPv4 addresses, and didn't know if there was a set rule in some obscure networking document. Do I do a straight sort on the raw address only (such as converting the IP address to a 32bit number and then…
Kumba
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Route iptable traffic to ip6table

I have 2 servers, server A which users connect to using IPv4, server B which server A tunnels all traffic to server B using ipv6. The question is how to forward all ipv4's incoming traffic on server A through IPv6 tunnel to server B? In…
xtg
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Internet reachable from the first subnet, not from the second, on same NIC

Hi (I hope this a the right place) I'm working on ubuntu 18.04 with ifupdown (/etc/network/interfaces etc.), not netplan. I'm trying for several days on this difficulty. one PC (A) with 2 cards : enp4s0 linked to my FAI (Internet 192.168.100.254)…
romaillard
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How can I disable IP forwarding from IPv6 toIPv4

I have IPv4 and ipv6 addresses on my network card, when I send a request with curl I want only the respective IPv4 or IPv6 to be used and no fallback e.g. When IPv6 to IPv4 takes place. curl --interface XXXX: c020: XXXX: e601: XXXX: 596c: XXXX: db97…
Myra Sewitz
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Is the network part of an IPv4 address unique?

I get that an IPv4 address can be subdivided into two parts, the network part and the host part. In my private home network, is the network part publicly unique?, i.e., may other people have the same ipv4 address as me?
Duarte Arribas
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Banning an IP address

I banned an IP on my server, but I'd also like to ban using the CIDR method, e.g. IP/24. My questions are: How do I find the CIDR range of the IP address. When banning the range, if the user has a dynamic IP given to them by their ISP. They would…
Usernamehere
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