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
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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 ...
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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 ...
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squid proxy - use ipv6 only for outgoing traffic
I want to set up a squid proxy to use ipv6 only for outgoing traffic.
I want the ip4 address to be totally invisible to the service I connecting to.
I don't care about fallback and lack of ipv6 ...
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Using 'netsh interface ip set address' to override another adapter's address?
I'm one of the developers of the OpenConnect VPN client.
We're trying to modernize and improve our support for Windows. We use a user-customizable JScript called vpnc-script-win.js to configure IPv4/...
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Kubernetes cluster not working after setting up IP forwarding
I am doing a research project and our end goal is to essentially construct a kubernetes cluster using several Raspberry Pis. I've included the fact that we are using Raspberry Pis for reference, but I ...
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Use network and boradcast IPv4 addresses for normal unicast traffic
Given the current exhaustion of IPv4 addresses, I would like to try to use the network and broadcast address of by /29 prefix.
Is this possible?
I am renting a /29 from Hetzner and assign the ...
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Debian Stretch IPv6 prioritization
I have a Debian Stretch system with both IPv4 and IPv6 addresses and default gateway. IPv4 and IPv6 addresses in the internet are reachable. When I start a ping to a domain which has an A and AAAA DNS ...
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Can i disable link local IPv4 address assignment in route table Ubuntu 16.04 permanently
I am having trouble with disabling link local IPv4 address getting added in my routing table.
So far i have uninstalled, avahi-daemon, commented out link-local 169.254.0.0 line in /etc/networks file ...
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IPv6 connectivity through IPv4 using OpenVPN
I've set up a Debian-based server at home, which handles dhcp and a bunch of other services. Unfortunately, even though the machine is capable of using IPv6, my ISP doesn't support it. I was wondering ...
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Adding IPv6 support in Client-server application. Is it common to have IPv4 stack disabled at OS level in "Pure IPv6" production servers?
OS in considerations : Windows Server 2008+
We are adding IPv6 support in a complex client-server network application. Server opens many ports for listening, and different types of clients connect ...
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cannot bind a port altough LISTEN
I'm new to this problem I'm using Ubuntu 12.04 LTS via VMware
My problem is to bind port 6703 i tried alot of commands to check if this port or open or not
Error Message is
Failed to bind to: 0....
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Dual Stack Kubernetes cluster assigning single stack IPs to pods & services
I am creating a dual stack Kubernetes cluster with kubeadm, and installing Calico. I am using the below configuration file for kubeadm:
apiVersion: kubeadm.k8s.io/v1beta3
kind: InitConfiguration
...
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Linux confusing MAC addresses for its IP addresses to Cisco switch?
I have multiple CentOS boxes (both Centos 7) with two different servers. These servers have 4 10GB interfaces each. They are connected to two Cisco Nexus switches. Each NIC has a different IP address, ...
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Are their public IP ranges which don't belong to any country?
I've been working on project and we use IP geo-location using an API to identify user's country. The legacy code has an edge case when there is no country information for a particular IP. I have been ...
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Get-NetIPInterface property 'Dhcp' is 'Enabled' after setting static IP configuration with netsh
The Question
Set a static IP configuration with netsh:
netsh interface ipv4 set address name="Ethernet1" static 192.168.0.20 255.255.255.0 192.168.0.1
netsh interface ipv4 set dns name="...
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Squid in dual stack ipv4 / ipv6 reaching out for services only served on ipv4 interface
I am running a dual stack network and am running a server there (Squid, Apache, DHCP, Mail,...). The network is working properly. However not all services running on that server provide a listener on ...
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Can't ping host with two interfaces
I am trying to figure out why a network interface is not pingable and is returning an ICMP type 3 code 1 response: Destination unreachable (host unreachable).
I am trying to ping from host1 to one of ...
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Routing Internet Traffic through VPN tunnel
I am relatively new to the topic, so please do not mind if I ask simple (or stupid) questions.
I own a Raspberry Pi 3B and installed and configured an OpenVPN server on it.
Therefore I followed this ...
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uidrange iproute2 not working
I'm trying to setup routing based on uidrange, and I seem to keep hitting the same issue.
$ whoami
yawnt
$ id
uid=1000(yawnt)
$ ip rule list
0: from all lookup local
32765: from all uidrange 1000-1000 ...
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How to route a file to specific gateway?
I have Windows 8.1 Enterprise
I am connected to two internet connections on my PC with this gateways:
192.168.1.1 = my isp gateway
192.168.43.1 = my mobile usb tethering gateway
Now I want ...
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NFS/SMB - cluster phenomen (blade center / synology / multi nic)
I hope someone can help me as we have in the company a strange issue and not even our network experts have an idea.
The setup: We have a hyper-v cluster hosted on 16 blades in a HPE blade Center/...
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FreeSWITCH Dual Stack IPv4/IPv6
I'm currently trying to understand how I can enable my freeSWITCH to talk both IPv6 as well as IPv4. Currently, I thought it was going to be easiest to first create a set-up which works on IPv4 and ...
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What issues would arise if I decide to move my local network to IPv6?
I am managing a small corporate network, and actively investigate the possibility of getting rid of IPv4 entirely, at least on the LAN level. I intend to disable IPv4 DHCP and connect to each machine ...
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Squid IPv6 To IPV4 mapping
i just finished setting up my squid proxy server, i have lots of IPv6 and only two IPv4 on my interface. the way squid is working currently is to use specified IPv6 tcp_outgoing_address, but if ...
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Mikrotik port forwarding - no access to server
I need your help concerning port forwarding with Mikrotik's RouterOS!
I have executed this command :
/ip firewall nat add action=dst-nat chain=dstnat comment="Owncloud in NAT" dst-port=8079 in-...
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Access IPv6 server behind router with IPv4
An IPv4 client in Germany should access an IPv6 server in the USA. This server is in a private home with a common home-router.
If it was an IPv4 server, I would just configure NAT and port forwarding ...
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Unable to communicate over vpn after enabling IPv6 on tunnel for IPv4 or IPv6
I'm trying to enable IPv6 on my OpenVPN tunnels, but when I follow https://community.openvpn.net/openvpn/wiki/IPv6 and add
openvpn --version
OpenVPN 2.4.0 mipsel-unknown-linux-gnu [SSL (OpenSSL)] [...
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Add IP addresses on CentOS 6
I have a 12 IPv4 addresses that I need to add to a CentOS 6.3 machine however those 12 IPs are spread out among 3 different subnets. I know how to add additional IPs when they are on the same subnet, ...
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Netlink error while using IP queue
I seem to have an issue with IP queue.
I have a linux machine that I am using to run some experiments.
The linux machine is configured to be a router, having two NICs, connecting two other computers, ...
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Does TIME_WAIT affect dynamic ports?
I've read a bit about TIME_WAIT connections, and know they should be harmless to my server (connection closed, so no resource connected with this socket).
Recently, my server reached the magic ...
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Setting IPv4 address and domaine restrictions in IIS7
I have a couple of sites that I want to only allow access to specific IPs. I have added these IP addresses to IIS7 via the IPv4 Address and Domain Restrictions functionality, as per the link below:
...
user62975
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Use nftables to set up IPv6 NAT to IPv4
I am working on setting up a number of EC2 instances with IPv6-only networking.
A few of these servers require occasional access to IPv4-only resources controlled by third-parties.
Amazon has a blog ...
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iptables rules - Forward/Masquerade sevices using nat table
I need to complete an exercise with iptables on a network (docker containers) configured as follows:
A router host with 2 network interfaces (eth0 <- public 10.9.0.0/24; eth1 <- lan 192.168.60....
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IIS 10 - how to block an IP range
I'm trying to figure out how to block by range on MS IIS 10, but all I can find are partial range blocks (which maybe that's all IIS can do, but I'd like to know that rather than just guess that).
So, ...
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Can't add second IP adress via Netplan on Ubuntu
So I have a dedicated server for which I need a second IP adress. After ordering the adress the hoster just told me that i can now use the ip (giving me the IP, gateway and netmask). OS: Ubuntu 20.04....
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Windows Server 2016 unpredictable static routes
I am configuring routes on a Windows Server 2016 machine.
I've already set up a Lan to Lan VPN as follows on a DrayTek router:
Local network: 10.23.42.96/29
Remote networks: 10.41.73.0/24, 10.41.86....
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How can i access ipv4 on ipv6 server having nat ip4 with blocked ipv4 access?
I have a nat vps, there are some restrictions set by hosting company because of many abuses, they provide nat ipv4 and dedicated ipv6 on a server, before the server was working normal like i can ping ...
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How to prevent NetScan on a dedicated server?
we have a dedicated server from Hetzner, we are using it to provie nat vps to users, the problem we are facing is that users (which we don't know how to trace) is attempting netscan due to which our ...
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Split /24 IPv4 subnet into multiple /28
I would like to know if it is possible that a subnet /24 that I assigned to a dedicated server (via BGP session) can be divided into smaller subnets without the intervention of those who have access ...
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Centos7 server that has no IPV6 assigned to it, can't read IPV6 ips in access log
I'm using CentOS7, nginx as a reverse proxy and apache web server. This server doesn't have IPv6 assigned to it, therefore there is no IPV6 in the NIC. This server hosts several websites.
When I check ...
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IPv4 fragmentation and high speed data
Please excuse me if this has been answered before, but I couldn't easily find an answer.
My company creates high-speed measurement equipment, that produces roughly 0.7 Gigabit/second of UDP data. Each ...
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Service bound to ipv6 on linux machine - Can I disable IPV6 and access service on my IPV4 address?
I am attempting to install Tableau Server on Ubuntu 18.04 and have the management service running on port 8850. I am unable to access the service at that port on my IPV4 address as it seems to be on ...
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Force DHCP client to use only IPv4
I have Linux client (running systemd-networkd, version 244), and I want to configure it's network only with IPv4. However, the DHCP server offers both v4 and v6. Is it possible to limit the client to ...
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How to proxy ftp connection between IPV4 server to an IPV6 client and vice versa
We have a gateway solution which connects legacy RADIO's having ftp server running with IPV4 interface to DU's running with IPV4 ftp clients to do file upload and download operations.
And currently we ...
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Cannot ping two computers with each other on the same switch. (Newbie)
I am an absolute 0 in network science and I would like to understand it a little bit.
We have an offline machine connected to a switch, which is also connected to a series of other hardware that ...
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How to blacklist the "prefix" of IPv6
With IPv4 it is pretty easy to blacklist IPs since it's not cheap to get new IPs and they are limited. However, with IPv6 it's pretty easy/free to generate a huge amount of unique IPs and it's pretty ...
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Link-local IPv4 network scope on Windows
We have an embedded PC that initially starts off life with a link-local IPv4 address, typically 169.254.0.1. It broadcasts its existence using Zeroconf using the python-zeroconf library. These ...
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iptables -> ip6tables (convert)
I have the following iptables (ipv4) and need the same on ip6tables (ipv6) for an openVPN-Server:
# Flushing all rules
iptables -F FORWARD
iptables -F INPUT
iptables -F OUTPUT
iptables -X
# Setting ...
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Are there issues if you run a IPv6 private network with IPv4 values and an empty prefix?
So i recently found out that the last 32 bits of an IPv6 can be addressed by their decimal value (not universally, busybox ping doesn't).
So your IPv4 network is 10.0.0.0/8 and your IPv6 is ::10.0.0.0/...
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Azure: Difference between IPv4 and IPv6 single IPs versus bundle
I want to assign public IPs to my services (IPv4 and IPv6 are needed) but I can choose to either:
Assign a dedicated IPv4 Address
Assign a dedicated IPv6 Address
Assign a bundle - of an IPv4 and IPv6 ...
