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Questions tagged [ip-address]

IP address is a numerical label assigned to each device participating in a computer network that uses IP for communication.

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Can I see from an outside perspective if a IPv4 and IPv6 address are mapped to the same server?

I am using a shared webhosting, for which I have an IPv4 and IPv6 address pointing to the server. I am wondering, if any user can see from the outside that both addresses point to the same server? Are ...
flip's user avatar
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Better way to block IP Addresses with an Azure VM

I am using Azure for my virtual machines and it gives you a way to block IP addresses in the Network Security Group. However this IP list is getting quite long. Is there a better option to do than ...
Mike Flynn's user avatar
0 votes
1 answer
57 views

Domain name resolves to IP address

I wanted to get clarity on this issue (instead of the usual try-stuff-till-it's-fixed approach). As a developer and curious person I really want to understand what's going on here so I can ...
Jillian Hoenig's user avatar
0 votes
1 answer
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Creating a server with fixed IP that can be freely moved among networks

Given a public /24 prefix, announced via BGP, 192.0.2.0/24. I have split this prefix into various smaller networks. I would like to use 1-2 servers for the DNS server (forward and reverse) which needs ...
divB's user avatar
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5 votes
5 answers
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What does a CIDR mask mean in the context of "ip address add"?

I'm attempting to learn to set up Wireguard properly (not just by copy-pasting). I've come across this line on the quickstart page: ip address add dev wg0 192.168.2.1/24 Reading the man page for ip, ...
Clonkex's user avatar
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1 answer
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Is it possible to change the routing preference on an existing Azure public IP address?

When creating a public IP in Azure, you can set the Routing Preference to "Microsoft Network" or "Internet Routing". But looking at an existing public IP in the Azure Portal, that ...
tloflin's user avatar
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1 answer
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RTNETLINK answers: Cannot assign requested address

161: ovs_bond0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1 link/ether 00:11:32:xx:xx:xx brd ff:ff:ff:ff:ff:ff inet 192.168.0.20/24 brd 192.168....
Silver Lee's user avatar
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running systemd-run with some bpf-firewall rules as regular user does not work

I'm trying to run a program with restricted networking via systemd-run as root systemd-run -p IPAddressAllow=192.168.253.1 -p IPAddressDeny=any PROGRAM works nicely but as regular user none of the IP ...
Felipe Alvarez's user avatar
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1 answer
1k views

Is there a way to get the IP address of the interface on the other end of a wireguard tunnel?

Server 1 is the Wireguard server (listening). Its Wireguard interface wg0 interface IP is 10.100.100.1. Server 2 is a Wireguard client connecting via the Internet to server 1. Its Wireguard interface ...
fdmillion's user avatar
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ip address inet 127.0.0.1 changed unwillingly to 172.27.28.124 (Ubuntu 20.10 without netplan)

Below you can se the address 172.27.28.124 being used for lo. However the address was a few hours ago 127.0.0.1, this is the good value. This should not be changed. Could you please advice on how to ...
ATX's user avatar
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Accessing a REST API from behind a firewall: whitelist the API's outbound IP addresses?

We have two applications. One application exists behind an on-premise site's firewall. It communicates with our second application, a service app that operates a REST API in the Azure cloud. My ...
StinkySocks's user avatar
1 vote
1 answer
601 views

IIS 10 website with hostname served by Default Web Site

I have configured some websites in IIS on my Windows VPS. When I am accessing this subdomain installer.app-wards.com from the server, it's going to the wwwroot folder from Default Web site instead of ...
Peekyou's user avatar
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0 votes
1 answer
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If I change my router's IP address, why do all client devices assume it's at 192.168.1.1? [closed]

I've decided to set my router at some non "1.1" IP address. I have even created a QR code for connecting to the Wi-Fi. The problem is, it looks most devices assume that if the DNS address is ...
Ate Somebits's user avatar
0 votes
1 answer
714 views

Re-route all incoming traffic to my home computer over the wireguard interface

I have setup a server in AWS with WireGuard server installed on it. I configured the server and the client and the vpn connection is up and running. I am able to ping from my local computer to the ...
Tim B.'s user avatar
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1 answer
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Stop Nginx from listening on all loopback IPv4 addresses EXCEPT 127.0.0.1

On Ubuntu, Nginx apparently listens on all of the IPs in 127.0.0.0/8. How can I disable listening on 127.0.0.0 and 127.0.0.2–127.255.255.255? That is, the only IPv4 loopback address that I want Nginx ...
Ben Zelnick's user avatar
0 votes
1 answer
166 views

postfix restrict smtp sender based on ip address

I have a postfix server that I inherited many years ago. Originally it successfully controlled the sending of messages through authentication and IP addresses - if an authenticated user was sending ...
bithead's user avatar
1 vote
1 answer
55 views

How to connect to host in a different address range and VLAN

We have an industrial machine that has an intergrated web server we can connect to for changing parameters. The machine has an address in the 172.29.x.x range. My address is in the 192.168.x.x range. ...
SenseiRalph's user avatar
0 votes
1 answer
353 views

Firewalld Allow 1 ip address from a subnet and drop the rest

I am using firewalld to control access to my AlmaLinux 8 server. I have several subnets defined as sources in the DROP zone and it seems to work well. I am wondering if is easily possible to allow ...
El_Tel's user avatar
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0 answers
104 views

Website IP address doesn't match up with any EC2 instance IP addresses (AWS)

I've been asked to look at some non-technical friends' AWS account because they're worried about their costs, but I'm struggling to find where they're spending their money. In particular I'm getting ...
Harry Hudson's user avatar
-1 votes
1 answer
68 views

Windows folder share permissions

I suppose this is straightforward but can't get a solution for it. When i share a windows folder (server 2012) and set its permissions (share or ntfs) then if someone from the network writes "\\...
albuquerque's user avatar
0 votes
2 answers
880 views

Bind nginx to vpn address only [closed]

I am probably unnecessarily paranoid. But still also I think paranoid isn't too bad when it comes to security. I have a web server running on a VPS. I run zerotier on all my VPS and my home machines. ...
unsafe_where_true's user avatar
2 votes
1 answer
648 views

How to make systemd journal remote use hostname instead of IP address?

I do have one log server which runs systemd journal remote software to receive journal entries from remote hosts via systemd journal upload. This works fine. The only trouble that I have is that the ...
antonio's user avatar
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0 answers
224 views

Map IP Address (NGINX running) in cloudflare

I have an IP address 65.1.106.XXX. In this instance, Nginx is running and I can able to see the nginx status page through this IP address. Now I'm trying to map the subdomain to this instance IP ...
ram's user avatar
  • 101
0 votes
1 answer
450 views

Debian server changing ip address

I had set up a Debian server with an ip address that was assigned to another device by accident. I forced the server to connect through /etc/network/interfaces but am still finding it switches to the ...
Amar172's user avatar
  • 11
3 votes
1 answer
2k views

apache 2.4.54 (httpd) require not ip not blocking ip addresses

So I am running apache 2.4.54 on a redhat centos 7 machine. I am using the below configuration to run my django application with mod_wsgi: # create new #LoadModule wsgi_module modules/mod_wsgi.so ...
Shmack's user avatar
  • 141
0 votes
2 answers
145 views

All IPv6 prefixes that should be routed by a public router

I need a list of IPv6 prefixes that that cover the public internet with the fewest possible entries. I´ve found the answer for IPv4 here: IPv4 CIDR Ranges for Everything except RFC1918 The problem is ...
Patrick's user avatar
  • 11
0 votes
1 answer
2k views

Nginx change default IP form 0.0.0.0 to pecific IP

I have nginx running as a web server. The virtual host have the IP specific configuration with IP addresses listed, however whtn I check netstat Nginx is litening on 0.0.0.0:80. I would like to change ...
Tibby's user avatar
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0 votes
6 answers
9k views

How can I get the IP address IPV4/IPV6 on linux

I don't have much knowledge to network layer, I know the basic command to get ip address. Have one requirement where I need to read ip address and it should work for any linux or unix system. I am ...
Ravat Tailor's user avatar
0 votes
0 answers
60 views

Tentative of shh->rsync to wrong IP; potential security risk?

I have set up a little RPI backup 'server' (with rpi OS) on my LAN. I use it to create a backup of my main personal machine data using rsync, and I reach it from outside my network through SSH (key-...
maxechstack's user avatar
0 votes
1 answer
353 views

Should I create reverse zone in bind9 if I don't have authority over the ip address?

But I don't manage the ip address blocks... I have 2 dedicated servers each in different data centers the first provider offers me a panel to configure the reverse zones myself, in this case if they ...
Andrés Alvarez's user avatar
1 vote
0 answers
849 views

How can I make TPROXY option in iptables work when the destination proxy address is a non-local one?

I installed a TPROXY server in my router that forwards the traffic to a SOCKS5 server. The router has the address 192.168.1.1 and my PC has the address 192.168.1.33. Also, I have a local bridge "...
phantomcraft's user avatar
-2 votes
1 answer
54 views

Specify different broadcast IPs for different Windows machines [closed]

I run some high-frequency trading software from home across multiple accounts. Sometimes during very volatile conditions, I run into issues with rate limits restricted by IP address. I was assuming I ...
Will Calderwood's user avatar
0 votes
0 answers
86 views

Script to reassign floating IP address to my other machine running Ubuntu

I have a floating IP(X.X.X.191) assigned to the machine (Y.Y.Y.106) currently running ubuntu. Now I want the same floating IP to be assigned to my other droplet(Z.Z.Z.252). On digital ocean I can do ...
Himanshuman's user avatar
1 vote
1 answer
902 views

403 Forbidden on initial load after installing NextCloudPi

I am making this post mostly for awareness in case anyone else is having a similar issue. Story I am running nextcloudpi (nextcloudpi.ownyourbits.com) on a Raspberry Pi 4 8GB using the Debian Buster ...
Aaron Welborn's user avatar
0 votes
3 answers
620 views

Why would you use 192.168.0.0/16 over 10.0.0.0/8 [closed]

Most home networks use 192.168.x.0/24. I wonder why this range even exists. You could as well use 10.x.x.0/24 or something like that. So why did they waste the entire 192.168 range for private ...
Niwla23's user avatar
  • 17
0 votes
1 answer
2k views

Assigning a Public IPv4 automatically to every KVM VM thats being created?

Im wondering how would i go on about assigning a public ipv4 to each vm thats being created. Setup : Host Server with 3 IPs on CentOS8 using libvirt and kvm to virtualize Bridge br0 using eth0 as ...
Keith's user avatar
  • 3
0 votes
1 answer
360 views

Prevent Windows Server 2019 with static IP from detecting new networks?

we've got some Windows Server 2019 VMs running on XCP-NG. They are configured with static IP addresses. We have two VM hosts: a primary site and a backup site. Our network admin has created a VLAN ...
zevgeny's user avatar
  • 21
0 votes
2 answers
62 views

Do routers need to have assigne IP from given VLAN to foward VLAN packages?

(sorry for my basic question but I had noone to ask) Does routers/smart-switches that foward/pass vlan packets inside same network need to have assign IP from that given VLAN that they foward packets (...
Va_ni_tas's user avatar
0 votes
0 answers
1k views

I Could not ping or curl master node flannel interface

I have 3 nodes in the cluster, one is the master node and two are the worker nodes. I use CNI flannel for the Kubernetes cluster. I run an Nginx ingress in my cluster for the load balancer and the ...
newcomers's user avatar
1 vote
2 answers
3k views

Nginx - If IP then proxy_pass else return 403

I am trying to proxy_pass users with certain IPs to http://server1 and certain other users to http://server2. I'd like to return 403 if the user doesn't match any IP. Here's what I have: geo $...
dmuensterer's user avatar
-2 votes
1 answer
285 views

Discover IP address of the device knowing only MAC address

While "wiresharking" the network, You may come across packets that looks like THIS eth.src to eth.dst (mainly colored white).. sometimes Wireshark recognize protocol LLC, NDP etc.. but ...
apech zzz's user avatar
0 votes
2 answers
660 views

Best way to route traffic based on logged in user via specific redundant route?

I have an Ubuntu 20.04 machine with 2 ethernet interfaces with 2 IP addresses each. It's an AWS EC2 instance and each of the 4 IP addresses has an EIP attached to it via NAT. Both interfaces connect ...
MoWo's user avatar
  • 583
1 vote
1 answer
352 views

Managing Firewall Rules for Azure Analysis Services

My customer (a legal firm) has an Azure Analysis Services database. Access to the model is tightly controlled to prevent leakage of confidential data. Employees who need to access the model whilst ...
Jazza's user avatar
  • 135
0 votes
0 answers
1k views

Server changes Domain Name to IP in address bar

I'm no server guru so looking for some assistance. I am hosting a laravel project on a digital ocean droplet, and pointing a subdomain registered at godaddy to said droplet. The address bar is ...
Kyle R's user avatar
  • 1
-1 votes
1 answer
1k views

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 --...
Myra Sewitz's user avatar
0 votes
0 answers
105 views

how can I switch between ip addresses

How can I switch between IP addresses on Ubuntu 18.4. My network card has several IP addresses. How can I, for example, change my IP address automatically every 10 seconds?
Myra Sewitz's user avatar
0 votes
1 answer
460 views

What exactly is a floating IP and how does it work?

I am setting up a high availability load balancer. I found this tutorial from Digital Ocean which says that two load balancers can share a common floating IP. https://docs.digitalocean.com/products/...
user1034912's user avatar
  • 1,364
1 vote
0 answers
350 views

How to add static IPv6 in Oracle cloud

I am running OS Ubuntu 18.4. I will add static ipv6 address with netplan in Oracle cloud my netplan yaml file looks like this: network: version: 2 renderer: networkd ethernets: enp0s3: ...
Myra Sewitz's user avatar
0 votes
0 answers
148 views

Security issues with configuring default IP address(0.0.0.0) to ethernet interface

In our linux embedded application we would like to keep available ports up and running and assigning with 0.0.0.0 IP address. In short we will be executing all ports with ifconfig ethX 0.0.0.0, and ...
Gilson PJ's user avatar
  • 101
0 votes
1 answer
672 views

Cannot assign a previously used static IP address to an OpenVPN client

We have an OpenVPN server with the following server.conf: local x.x.x.x port 1194 proto tcp dev tap ca ca.crt cert server.crt key server.key dh dh.pem auth SHA512 tls-crypt tc.key topology subnet ...
pacoverflow's user avatar

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