Questions tagged [ip]

IP - Internet Protocol, the most commonly-used set of rules for dispatching data across a large computer network.

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IPv4 Addresses and AWS Elastic IP

So, the world is finally out of IPv4 addresses. It's been expected at least since I've been to college in 2004. But how is it that AWS have so much of this precious product, that they can give them ...
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Does a reverse proxy use subdomains to know which private IP to route to?

I know this is very basic, but I'm very new to the reverse proxy, network admin world. Could someone provide a high level overview how a reverse proxy knows which server/port to route traffic to? Does ...
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Do ports change for every request? Are Ip ports are different from system ports?

A typical ip address has >65k ports then again a system that runs localhost offline has port which sometimes face conflicts. Am very under-read in this area please give some light. Pardon my English. ...
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DNS propagation taking over two months

Two months ago I registered bunch of expired domains and set new nameservers to them just like I've done before. Never had any issues. For some reason the DNS propagation never finished with these ...
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List active sessions from tun interface

I'm running CentOS and have a tun interface with IP subnet 10.0.0.0/24 attached for "users". Is it possible to list current active sessions with netstat, ss or similar? Ex. netstat something: tun-...
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Why IP address overlapping occurs in IP forwarding table?

My understanding of an IP forwarding table is that they have a listing of different networks (identified by their IP ranges) and connects it to the next-hop router. However, I'm surprised why two ...
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1answer
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How to open google.com using curl with Host header (certificate does not match) [closed]

Since Google is using HTTPS/SSL I am unable to access it using the IP of Google.com and passing the Host header. I don't understand why this is not working. Here is what I have tried so far. I got ...
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VPN and Local Network IP Conflict

I'm running into an issue on my network. I have a local network that connects to a router with an address of 10.0.0.1. I also have a Router on the VPN that with the same IP of 10.0.0.1. ...
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What keeps IPs from being double claimed across the world?

When I connect to the internet, my provider assigns me an IP. If someone else does that at the exact same time in another country with a totally separate provider, what keeps them from getting the ...
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2answers
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AWS bring your own IP

I am a newbie to AWS. I understand there is a feature to move our own IP addresses onto AWS. So, any existing IP based restrictions don't have to change. I have a need for a new service to be deployed ...
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SNMP: How to find a computers IP and MAC-address? (Debian)

I'm playing around with Net-SNMP and I'm trying to find my computers IP and MAC-address but it's not working. This is the command I'm running: snmpget -v 2c -c public localhost 1.3.6.1.2.1.4 I'm ...
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How can I block all IPv6 Adresses starting like this 2a01:598:xxx in my .htaccess file?

How Can I block all IP Adresses that start like this 2a01:598: in my htaccess file? I tried: Deny from 2a01:598::/28 and i also tried it like this: Deny from 2a01:598:: But it doesnt work? What ...
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How to disable direct ip access for apache tomcat

So someone keeps ddosing me because I have a google banklink, I heard if you stop direct ip access you can prevent this, if this is possible can someone please help me, this is something really ...
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Azure: How to assign a Reserved IP to a new/existing machine?

What I am trying to do is configure my VM such that it doesn't lose the public IP between restarts. I have created a Reserved IP: I've tried this both with an existing VM and while create a new VM ...
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How to route to an interface (not VIA an interface)

I have defined a dummy0 interface: sudo ip link add dummy0 type dummy sudo ip addr add 200.200.200.0/24 dev dummy0 The interface is there alright: $ ip addr show dummy0 50: dummy0: <BROADCAST,...
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Using .0 ip on a routed /24 IPv4 subnet

After routing a full /24 subnet to a single server it's possible to configure the server to listen to any IP from the subnet without reserving IPs for the subnet itself or for the broadcast IP. ...
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How to buy on “owned by me” elastic ip address in aws? [closed]

I want to buy an own ip address which i can use for my aws server as elastic ip. How is this possible?
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1answer
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Buying an IP address from Morocco and assigning it to an AWS server? [closed]

Due to some restrictions of a service, I can only login from a Morrocan IP address. Is it possible to get a Morrocan IP address and assign it to a VPN proxy that I created on AWS using an elastic IP ...
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Multiple virtual interfaces on top of GRE tunnel

I have a GRE tunnel defined on an interface: $ ip tunnel add ap2gre mode gre remote 10.1.0.1 local 192.168.1.2 ttl 255 $ ip tunnel ap2gre: gre/ip remote 10.1.0.1 local 192.168.1.2 ttl 255 $ ip ...
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Router sharing same IP address between parent and subnetwork

Suppose this hypothetical scenario: I have a parent network 192.168.0.0/16 and a subnetwork 192.168.42.0/24. I have a router with two network interfaces in between, whose address in the subnetwork is ...
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Accesing device in another subnet through router OpenWRT

I'm trying to setup communication between device1 and PC. The network diagram: https://i.stack.imgur.com/OdbTJ.jpg What I need is an acces to Device1 from PC in network configured as shown above (...
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Creating multiple socks5 proxies using a single server with multiple assigned IP addresses

I have a linux server at a webhost, from whom I have also purchased 9 additional IP addresses. In total, my server has 10 IP addresses. I want to set all of them up as SOCKS5 proxies. How do I go ...
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Static Ip Management with moving pcs

So i have a question which has been answered but i thought my situation is a little specif. i need to manage 350+ static ips (One Large Workgroup) but the hurdles i have are: 1: they all the the ...
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Webserver, and Exchange Server on single IP

Is there a way to run both a web server IIS10 and exchange server using only one IP? They are two separate server but due to only having one IP, I only have a single 443 port.
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What does modern DDoS prevention look like from a networking perspective? [closed]

I understand that there are network and IP-level mitigations for DDoS attacks, but I'm not clear on how they work in practice. My hope is that this question and answer will help to frame how the core ...
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Configuring wildcard A record correctly for Gitlab server to use Gitlab pages

I have a private Gitlab instance and I want to set up gitlab pages with it. I have problems configuring my A record. According to the gl doc https://docs.gitlab.com/ee/administration/pages/ I need ...
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Will a root domain with an A record pointing to a private IP address be publicly visible? (Gitlab)

I have private Gitlab instance running on a private IP. I want to host a website with Gitlab pages that is only visible inside my network and not accessible from the outside. Also I need my private ...
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62 views

Route traffic through floating ip

I have a (kubernetes) cluster (3 servers, ips 172.20.10.[10,11,12]), and between them their is 1 floating ip (172.20.10.20). My provider has an 1:1 NAT for an dedicated public ip to the floating ip. ...
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Does VPS server have a static IP?

I am switching from shared hosting to VPS on a different host. I was thinking just to type in the IP into DNS records, but a popup text about floating IPs got me confused. I'm not sure now if: this ...
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KVM how to create ip overlapping virtual network with NAT access to LAN

for some test scenarios i need to isolate VM from the LAN itself (by NAT), but using still a LAN IP addreess. I then need to access those VM via some dedicated ports via portforwarding. Example. KVM ...
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VXLAN with different group but same vxlan id on ubuntu

I'm playing with vxlans on ubuntu 18.04 right now and I just found something strange. I have 2 servers with 4 containers on each. Containers are connected to bridges br1 - br4. There are vx1 - vx4 ...
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Docker swarm and cloudflare dns

I have a docker-swarm set up in digital ocean. For now there's only 1 master node but more will be added soon. I use cloudflare dns for this one, and provided the master node's IP as A record IP. It ...
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Guest VM can't reach physical LAN

I've created an Ubuntu VM on hyper-v and I need it to communicate with the physical LAN and the host machine. Since I can't just simply get an IP address from the physical LAN (because of office ...
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2answers
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How do you have multiple websites on one ip address with no dns(raw ip address)?

I have two private websites that are running on different devices, that I want to use but aren't using a DNS, so the web pages that I am using are on the same Ip-Address. How can I get the contents ...
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1answer
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systemd: Why “ens3: Could not set route: Network is unreachable” when default route is valid?

Recently my VPS hosted at OVH abrutly lost connectivity. Upon further inspection, systemd-networkd was failing to set default route: ens3: Could not set route: Network is unreachable. It isn't clear ...
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1answer
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Why this ip range is only showing * * *?

I've got a question. When I try to do this on GNU/Linux: traceroute -m 255 -I [the_ip] Then I get this: 192.0.0.1 (192.0.0.1) 6.788 ms 6.774 ms 6.781 ms 62.214.36.201 (62.214.36.201) 7.672 ms ...
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Ubuntu set default outgoing ipv6 address

On my ubuntu server I configured multiple ipv6 addresses as following with netplan: network: version: 2 renderer: networkd ethernets: eth0: addresses: - xx.xx.xx.xx/22 - ...
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google vm instances does not seem to be on correct region

I created one google vm machine engine instance in eu-west1-b region. In GCP Console seems to be in eu-west1-b region. However when I try to gelocate my ip's they seem to be in somewhere in China. The ...
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3answers
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In IPv4 Subnets - a /23 - How do we know which range to use? [duplicate]

Let's assume I don't know what my IP range is, or my default gateway, but I know my IP address is 192.168.5.38 and my CIDR Range is /23. How do I know what my IP range is? Is my range 192.168.4.0-...
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Different IP for same FQDN using different resolver

For my domain gobudgie.ml I get different IPs on different DNS resolver eg.: jasmich.ml@8.8.4.4 (Default): jasmich.ml. 964 IN A 31.17.211.88 jasmich.ml@1.1.1.1 (CloudFlare): jasmich.ml. ...
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why my Authoritative DNS Server on Ubuntu 18.04 not working after server ip changed? [closed]

I have an Ubuntu 18.04 VPS server that I ran both authoritative DNS and web server on it. I use BIND 9.11.3-1ubuntu1.9-Ubuntu for DNS system. Everything was just fine until for some reason I had to ...
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1answer
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cURL specify outbound IP - Windows

I have configured my Windows AWS instance to use two IP addresses and would like to be able to choose which of these two IPs are used for a HTTP GET request using curl (pycurl). I want it to appear ...
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33 views

OpenVPN on same server with proxy

I have OpenVPN server with clients with static IPs (192.168.1.0/24). When I access another device connected to VPN I get desired 192.168.1.2 static IP, however when I access proxy server on same ...
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i cannot login to IMAP/POP3 from different location

[Please read before marking as duplicate] I have installed Postfix and dovecot on Ubuntu (for virtual Users). So i can login into the mail server from home using cellphone(mail app) and even on ...
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Openvz containers each with public ip

I have a dedicated server (Centos7) with OpenVZ, Virtuozzo. The dedicated server has 6 usable public IPs. eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 8.8.30.228 netmask 255....
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How to solve the following error?

I have created one instance at Amazon Lightsail where Platform is Linux/Unix and choose Wordpress as an application. Using this Wordpress, I have designed one website and it is running using Lightsail ...
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How ro ping from IPMI interface

I am wondering if it is possible to ping an IP address from the IP address of IPMI board. I tried ipmitool and ipmicmd without success. Many thanks in advance for any kind of help.
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Coming Soon Page with Varnish : Exclude Redirection by IP

I've tried to install Varnish Cache with Magento 2. It seems to work OK (although I still have a no-cache to find and to delete apparently ...) but my .htaccess redirection for my "coming soon" page ...
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Can adding a fake arp entry send the traffic over a wire to an external interface?

I am trying to run a self test of a PMC card that has two interfaces. My operating system is Vxworks 5.5. I have read different solutions in this forum like use of network namespaces, use of fake ...
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How is name resolution happening?

I have a Windows Server 2008 R2 server we'll call server1. It is in domain A. Another machine, server2 is in domain B. If I try to do an nslookup on server1 with just the host name server2, as you'd ...