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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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"Destination Port Unreachable" only on secondary IP of VM

An vmware VM is assigned two IPs. We can only ping one of the two IPs from VMs on the same network. 2: ens160: mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 00:50:56:98:87:db brd…
Vladimir
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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 localAPIEndpoint: advertiseAddress: 0.0.0.0 …
Eddie Aspden
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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 192.168.60.0/24; the router is the x.x.x.254 on both networks) and…
Giuseppe
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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, for example, the range 10.6.64.0 through…
Merennulli
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Tuning Amazon Linux for TCP Handshake, receiving 200-300KB response, and then closing connection

I have an application which regularly creates a new TCP connection, makes a request, and then gets a just under ~300KB response before closing down the connection. Assuming that I can't redesign this workload, and that the latency between my side…
Cory Kendall
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Set IP address from VPN service (not from internet service provider) as main IP for server

I’m currently trying to get 3-4 servers for our business, situed in our office, but the main problem for us is IPv4, as in Canada, ISP charge basically ~15$/month for a single IP. It not really a huuge problem as if that the only option, we will opt…
Wtrnd
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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 20.04.5 LTS x86_64 My issue is that I don't understand…
flololan
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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, 10.41.86.128/28 which is online and working. The network…
Hackjaku
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iperf3: error - unable to connect to server: No buffer space available

I am testing usb to ethernet adapters by using iperf. The product I am testing has 12 ports to test, and I have 12 usb to ethernet adapters each having their default ip address. I am using Test Stand to test these ports. My tests are stable and they…
Theta
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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 or download from webpages easily using ipv4, but…
Blohsh
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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 dedicated server is getting its ipv4 access to…
Blohsh
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Channeling IPv4 packets to IPv6 packets between interfaces

How do I route packets in my machine between interfaces (See yellow arrow). Eth0 receives IPv4 packets and I will like to channel it to Eth1 which will send IPv6 packets out.Image of dual stack machine with IPv4 and IPv6 interfaces
Mervyn Heng
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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 to physical equipment. What I would like to do is…
F.Hazi
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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 the access log, if a visitor has IPV6-only IP, I…
Stas Styler
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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 set of samples is about 2500 bytes long, which…
Roel Baardman
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