Questions tagged [ipv4]
Refers to the 4th revision of the Internet Protocol, where addresses are usually displayed in the form: 192.0.2.235
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IPv4 failing, link-local IPv6 works
For some reason, I can't reach my laptop by SSH over WiFi on its IPv4 address, as it always just times out. However, connecting to it via link-local IPv6 works just fine.
Pinging the laptop over its ...
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How can i connect to my home server that runs on a network using DS-Lite from a Ipv4 network?
I over the past year tryed to put up a home server and beeing able to conect to it from other networks, aspceially to host game servers for me and friends. Yet we always ran into the issue that some ...
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Security risks for Users using separate logins versus one generic login for the same database
We have several test databases that our support staff need to use. These systems have actual production data. For security reasons what is the proper and concise argument for each user having their ...
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ssh access denied via ipv4 but normal access via ipv6
I'm running Ubuntu 19 or 20 (both scenarios same)
I can ping and ssh over ipv4 to my server.
When i ssh it over ip4 it even asks for the username and password but denies access and shows "access ...
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What's my public IP address
I ran this command in Windows: ipconfig. And it gave me this:
Windows IP Configuration
Ethernet adapter vEthernet (Default Switch):
Connection-specific DNS Suffix . :
Link-local IPv6 Address ....
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Two public IPs from a single interface to two routers
My ISP provides me with two static public IP addresses which come in on the same ethernet wire. I want to use two routers (running OpenWrt) with one public IP per router. To achieve this, I have a ...
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Windows 11 loses IPv4 address one hour after boot
Problem Description
The problem I am observing is that I will lose connectivity with all non-local IPv4 hosts one hour after Windows 11 boots up. This would normally manifest as getting disconnected ...
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Public IPv4 and IPv6 addresses are located in different countries while using VPN
I am currently physically located in Mainland China, so I use a VPN by a European university. With this VPN, I can normally access censored sites and many websites appear to locate me in Europe, but ...
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Translating a domain name into a IP Address
Suppose we have a website with a domain name of "www.youtube.com".Is it possible for us humans to translate this directly into a IP Address(IPv4) just by looking at which is after the last ...
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Define route that is preferred "always"
I'm currently implementing an IPv6 only service. Since it should also be consumed using IPv4, I'm implementing a translator.
In the translator server, I need to add a route to a different netns to be ...
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Is IPv4 APIPA indeterministic?
Japanese Wikipedia article page for link-local address mentions that the creation of link-local address is almost always indeterministic (非決定論的 in Japanese). The corresponding English page does not ...
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How to set different dynamic IP address for each QEMU VM?
(Warning, предупреждение, попередження, avertissement (and whatever your language is): English is not my primary language. I wrote this through a translator).
I need to run about 7 virtual machines ...
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Do common OSes provide guarantees for IP fragment reassembly?
When sending UDP packets that exceed the PMTU, I'm told that the receiver will receive the packets in fragments. Does the network interface or OS of the receiver typically re-assemble the packets ...
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linux ipv4 forwarding limited throughput
My symptom is that client PCs on my LAN connecting through the WG tunnel to the remote host would max out around 250 Mbps, but it could be anywhere between 150 and 300 Mbps (i.e. lots of variability ...
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What is the easiest way for me to access my IPv6 server from IPV4?
I have a Nextcloud server that works fine, but I noticed that I cannot access it from certain places. What all of these have in common is that they seem to use IPv4.
This would make sense, as IPv4 is ...
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How to configure a static IP address in the local network for a Ubuntu VM?
I am using a Windows 10 laptop connected to the internet via Wifi. On it I run a VirtualBox with Ubuntu 20.04.5.
As I want to connect to the internet AND to the local network I plan to configure two ...
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ssh and ping work in one direction but not in the other
Two machines, say, old and new, are in the same local network and connected via WiFi to the same router (Speedport). Both old and new run Debian stable, have openssh-client and openssh-server (but not ...
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Ethernet communication between FPGA(Arty a7) and PC (Python)
I am new to this forum and I hope that topic fits the rules. I am a user of electronics-exchange and stack-overflow.
Intro
I am using Digilents development board Arty A7 and I try to communicati with ...
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Determine LAN and WAN IP address
Is there a simple way to determine the LAN and WAN IP address of a connected device?
I frequently need to check the local and external IP addresses of devices, especially mobile devices, but I tend to ...
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Can I access IPv4 DNS resolver from IPv6-only network?
Everyone knows that it is not possible to run nslookup command through an ipv6 resolver with ipv4-only host. For instance the following command will result error on ipv4 host:
nslookup facebook.com ...
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Can I proxy mumble traffic from IPv4 to IPv6 with socat?
I have an IPv6-only Mumble server at home (because I have no public IPv4). I want to make it accessible to IPv4-only users with a small VPN.
The VPN has a public IPv4 that I can ping
The VPN has IPv6 ...
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How can I get another IPv6 address on every port on 3proxy
I don't know much things in networking. I hope I can describe my problem...
My main IPv6 address is: 2a03:XXXX:X:XX::XXX:2
I want to bind 1000 port to 2a03:XXXX:X:XX::XXX:1
I want to bind 1001 port to ...
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Trying to change subnet of "static only" net-adapters from list of computer hostnames. Script runs but no change in subnet mask
I need to change the subnet mask of several machines at once from 255.255.255.0 to 255.255.0.0.
The goal is for the script to only do this on net-adapters that have static ipv4 addresses, and for it ...
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Can I get inadyn to dynamically update no-ip.com with both my IPv6 and IPv6 address?
My ISP provides my (well, my router) with both an IPv4 and an IPv6 address. However, it seems inadyn client - only registers my IPv4 address with my dynamic DNS provider, no-ip.com. Is it possible to ...
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How can I use the WAN interface IP address(es) in NFTables config?
Background
I'm attempting to write an NFTables configuration that would allow me to keep IPv4 and IPv6 forwarding rules in the same table.
I'm hosting some web services behind a reverse proxy and want ...
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Port forward on a new Huawei - HG8247W5 router
I searched the internet for a solution, however no-one seem to have this particular problem trying to port forward on a HG8247W5 Huawei router.
This is how I tried to setup the port mapping:
enter ...
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Is IP forwarding collectable in ubuntu?
I am using a VPS just to forwarding packets to a server that I have not access directly to it by running some linux commands like:
apt update
sudo sysctl net.ipv4.ip_forward=1
iptables -t nat -A ...
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Network eth0 down and won't obtain IP address after most recent 'apt updgrade'
Recently, one of my headless ubuntu 20.04 systems started displaying "System restart required" at login. As such, I did apt upgrade & apt update (not dist update). I did not regain ssh ...
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Missing ports on macOS in ipv6
I would like to understand how it is possible to have a number of different ports between my local ip v4 and v6.
I have a NodeJS service running on port 57110 but I can't see it on my IP v6. How is ...
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Need clarification about ipv6 multicast and ipv4 broadcast
I’m studying IPv6 and I’m traying to better understand how it works in deep.
So far, I know that there are essentially three types of addresses, based on the type of communication:
unicast: one to ...
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Some apps in WSL are inaccessible from the host OS while others are accessible on the same ports
I've got Ubuntu in WSL 2 running on Windows 10 (Version 10.0.19044 Build 19044) host OS.
Windows Defender Firewall is fully disabled.
What does work
A very basic Express app index.js:
const express = ...
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Subnet masking to get 2 subnets each with 126 host
Suppose we have a subnet mask of value 255.255.255.128. May I know please why this would split the network into 2 subnets each with 126 hosts?
From my understanding, if the subnet mask was 255.255.255....
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Static IP configuration with ip command in Linux gives Destination Host Unreachable
I am a total newbie when it comes to network configuration. I would like to configure my Ubuntu 18.04 PC so that it connects to a device.
I use USB to Ethernet converter and connect the ethernet jack ...
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Unable to get access to router home page after disabling NAT
I have a private home network using a single NETGEAR cable router. I accidentally disabled NAT in the router's home page, and after that I cannot access the home page anymore.
The thing is that I was ...
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Directly Pinging a Device (IPV4)
Hello and thank you for taking time to read this.
So I have a device (FPGA with network attachment on it) that I can change the IP address on. Normally it is set to 192.168.xxx.xxx and I can change ...
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IPv4 address in AAAA DNS record not working
Background (feel free to skip reading)
I have a server running Wireguard, to which multiple Android devices connect using the Wireguard app. This server has 2 WAN connections - a faster line that has ...
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Static IP address over different wifi access points
I'm setting up a headless PC in order for it to be accessible using ssh (over wifi) only, it has LMDE5 (a Debian based flavor of Linux Mint).
On one hand, setting a static IP address will give me the ...
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Access WISP LAN Network From Access Point Wifi Network
I'm using TP-LINK TL-WR840N (master router) as a Access Point and TL-MR3020(slave router) as a WISP, from slave router LAN port I have connected a device. The WIFI IP is in 0 series and the LAN series ...
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Are the number of available web-domains limited?
If there is a finite number of IPv4-addresses does that mean that there is also a finite number of web-domains ?
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Internet (mostly) works but unable to ping - how to diagnose?
Found a couple similar questions (1, 2), but they don't exactly cover my issue and there are also no answers, so:
Dusted off an older laptop with linux (NixOS 21.11.337659.06db2e21974 (Porcupine)), ...
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Forwarding IPv4 to IPv6 in Linux
I am trying to forward IPv4 traffic to IPv6. I currently have two Ubuntu boxes, and I am trying to use socat and SSH dynamic port forwarding to accomplish IPv4 to IPv6 forwarding, but no luck so far.
...
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Windows 10 assigning static ip address cuts off internet
When I run ipconfig at the command prompt on my Windows 10 Home machine, I get the following output which shows my ip address is 192.168.166.135 and gateway is 192.168.166.70
I'm trying to change this ...
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Can't access default gateway hours after factory resetting router
I've gone through this cycle of events twice. Can't access default gateway 192.168.1.1, so I factory reset the router, which fixes the issue, until it mysteriously stops working again a few hours ...
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Is it OK to use mixed DNS servers (e.g., Google as primary and Quad9 as alternate)?
I used to use Google DNS servers, i.e. 8.8.8.8 and 8.8.4.4, but I couldn't access certain websites. Then I decided to use Quad9 DNS as my alternate DNS server:
Now those websites are accessible, but ...
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How can i find device type and name in linux terminal without install nmap and other similar tools from it ip address?
I'm looking for find a way to get device name and type like ESET Connected Home Monitor .
Eset :
Connected Home Monitor can help identify vulnerabilities in your home network such as open ports or a ...
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When I put the Static IP I lose internet connection [closed]
I'm facing a problem we have several places that work by vpn from cisco and I can ping from this place to another with my static IP but I lose the internet connection and when i put the automatic ...
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Create a VPC with specific network address
I was going to created a VPC but I'm confused with some questions.
The questions i asked is on the second point dot.
Scenario: You have a small business with a website that is hosted on an Amazon ...
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How to avoid using IPv6 `::1` when sending a syslog message via `logger` to `localhost`
When using logger -n localhost -port 12345 ... I realized that logger is using IPv6 when creating the socket.
Unfortunately my syslog server listens on IPv4 only.
The work-around I found was to use ...
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Create Network Tunnel
Currently, I host a server in my house and a VPS from OVH. Is there a way I could create a network tunnel that lets me use any extra IP addresses from the OVH VPS for the server I have at home?
If ...
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Given the IP address 22.181.0.0/21, create subnets starting from this address
Given the IP address, 22.181.0.0/21, subnet the network for the following offices, based on the number of devices for them (The first two columns are given. I've calculated third, fourth and fifth ...
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