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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Map internal VMs to one domain for external access [duplicate]
I have the following situation that kinda got me stuck, since it's not really my area of expertise.
So, we have an internal server with multiple VMs, each VM hosting one or more applications, running ...
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Why does my Sonos speaker have my dad's name as it's hostname? [closed]
I ran nmap on my local network and noticed an IP address I didnt see listed under devices on my Unifi Network contral panel.
Nmap scan report for Davids-iPhone.localdomain (192.168.1.***)
Host is up (...
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How to limit IP addresses for RDP connection out?
I would like to limit IP addresses I am able to connect to from my server.
I didn't find any helpful ideas, I just found steps for setting scope for firewall rule "Remote desktop - User mode"...
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1
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curl: (28) Failed to connect to X.X.X.X port 80: Connection timed out
I'm getting this error:
curl: (28) Failed to connect to X.X.X.X port 80: Connection timed out
When I run this:
curl X.X.X.X
I'm curling a specific IP address and it fails on both port 80 and 443. I ...
CommunityBot
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0
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getting error in azure ip configuration
I bought a centos virtual machine from Azure and installed plesk in it, I got this error when trying to define a license for my plesk,
"This license belongs to the IP address "20.1x.10x.x1 (...
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2
answers
88
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Change netmask subnet on server due to reduced IP range allocation
I am running a few Ubuntu 22.04 servers, each with one IPv4 address configured.
Currently with a /24 network allocation, the datacenter requested some IP's back, and now I am left with a /28, which is ...
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IPREV check failing on multiple ipv6 addresses
I'm using a Raspberry Pi 5b running Ubuntu to host a Postfix and Dovecot mailserver from my home. After setting up various sender authentication mechanisms on the server eg. SPF, DKIM and DMARC - and ...
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Setting the same secondary public IP on multiple servers
The question concerns floating public IP's. I'm trying to set up a failover mechanism in the simplest way possible. Are there any hidden downsides to configuring the same secondary static public IP on ...
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1
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Convert IPv6 from the compressed/short format to expanded format
When I execute the command ip address show my server shows hundreds of IPv6 that I have assigned to it. It works great, however the leading and trailing zeros are omitted from the IP addresses, and ...
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2
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Issues with Ubuntu Network Setup
Please, someone tell me whats up here, I am going bonkers, I have used multiple calculators etc, everything tells me the details in the image are correct but ubuntu just will not accept.
CommunityBot
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Exclude local sub-net (local IP ranges)
In my company's VPN app we have a disable-able feature which excludes below List of non-web-site IP-address ranges from being routed into the VPN server.
This allows local-net Apps to continue working ...
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5
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What is this IP address: 169.254.169.254?
I have always noticed an IP something "169.254.x.x" in my routing table even when I am not connected to any network in my Windows operating system.
In Linux, when I list my routing table.
$ ...
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1
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Sending email with postfix on a specific IP address fails. Error 81126 with Gmail
Recently, I started to receive errors from Gmail:
host gmail-smtp-in.l.google.com[142.250.110.27] said:
550-5.7.25 [X.X.X.X] The IP address sending this message does not have
a 550-5.7.25 PTR record ...
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0
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How Linux kernel selects the source IP of outgoing data packets?
I have multiple IP addresses assigned to a network interface, each corresponding to a different outbound IP.
:~# curl --interface 112.73.59.255 ip.sb
157.119.73.25
Using the above command, I ...
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7
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How to check IPv6 address via command line?
How do I check the IPv6 address via command line?
For IPv4 I simply use:
curl ipinfo.io/ip
This doesn't work for IPv6.
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How do I find out the IP Address for all print jobs to a printer
Our network printer is spitting out unwanted print jobs which no one seems to collect. I want to know from which machine the jobs comes to the printer.
We have PaperCut in our server but these ...
CommunityBot
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1
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Which ip is chosen as source ip when sending a multicast packet on a specific interface with multiple ip addresses?
I am trying to send a multicast packet on a network interface with multiple host ip addresses(lets say ips A and B). How can I specify the source ip field of said multicast packet to the host ip that ...
13
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2
answers
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Keepalived for more than 20 virtual addresses
I have set up keepalived on two Debian machines for high availability, but I've run into the maximum number of virtual IP's I can assign to my vrrp_instance. How would I go about configuring and ...
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1
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How to block unrecognized hostnames in .htaccess (A Domain Name I Don't Recognize Is Redirecting To My Site)
I'm using Dedicated IP on a shared linux server... At first, I saw that an unfamiliar hostname displayed my own website like a mirror. I scanned the A records of this site to investigate what was ...
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Why do calls from our Google Cloud Function deployed in europe-west6 (Zürich) originate from an US located IP address?
We have a Google Cloud Function deployed in europe-west6 (Zürich), which makes HTTP calls to an API. In our server logs these HTTP calls originate from the IP address 35.203.247.36, which is showing ...
google-cloud-platform
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Wireguard VPN connection not resolving local host names
I have setup a Wireguard VPN on my raspberry pi and I can connect to it via client app on my mobile phone. I can access the internet though the phone and I confirm that the phone is using the same IP ...
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Error restarting networking service
I am trying to set both a static ipv4 address and a static ipv6 address on a home hosted Debian 11 server (it's actually just a PC).
Here is my /etc/network/interfaces :
# This file describes the ...
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709
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Connection to port times out despite it being open and listening
Contabo VPS running Ubuntu 22.04 server, there is no firewalld and no ufw running, fail2ban is installed and configured but currently stopped to figure out what's going on.
I have an nc -4 -k -l -v ...
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2
answers
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Get static IP address for Heroku app
I want to make a domain point to my Heroku app, so I am trying to create an A record that targets myapp.herokuapp.com.
The problem is that the domain provider requires an IP address, and I cannot ...
CommunityBot
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2
answers
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How to separate two IP Pools for the single LAN network
I want to create two IP pools in my private network. I want to do this so that the IP cameras in my network are separated and the data devices(PC's, AP's, IP Phones) are separated. But I'm doing all ...
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2
answers
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Should we use the LAN IP or the public IP for bind settings such as A records, etc.?
I'm a newcomer to working with bind, and a while ago, I purchased a static IP from an ISP. I used bind to bring up a domain, and now it's working without any issues.
For example: the LAN network IP ...
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169
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Creating onlink route via bridged adapter unexpected behavior
I am trying to create an onlink connection between a Windows host and a Linux vm guest in VirtualBox using a bridged network adapter. The IP on the guest 10.x.x.x. The IP on the host is 192.x.x.x.
I ...
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Is SLAAC generation affected by non 64 bit size network prefix?
I have enabled all the parameters needed for the generation of SLAAC, and I am obtaining router advertisement, but the network prefix in the router advertisement is /52 and not /64. The system is not ...
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I have a whole ipv6 range /32 for my application. I want to use all of it [closed]
The Problem
I know how to add block to interface. But I really don't know how to use specific address dynamically.
What I want
For example:
I have a block fe80::/32 for my application.
I will let my ...
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14
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How can I display the IP address of an interface?
If I want to display the IP address that is assigned to eth1, how can I do this in Bash?
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How to force a server to return my IP address in IPv4 and not IPv6?
Scenario
I have a tiny PHP script on a server that echoes the IP address of any client reaching it so the address can be added to the cpanel MySQL remote hosts table via the API. I call this script ...
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5
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Windows static routes w/o specifying gateway (next hop)
I have the following scenario:
Computer A: 198.51.100.8, netmask 255.255.255.0
Computer B: 203.0.113.9, netmask 255.255.255.0
Both computers are on the same LAN segment; no default gateway is ...
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How to create a static IP for pods in OpenShift?
I have an application that needs to get data from a mainframe using FTP.
Each MF account is connected to a specific IP, whenever I try to connect from the pod I am connecting through a different ip ...
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Utilizing A Secondary IP On A NIC In A Windows Cluster
RELEVANT INFORMATION
I have a windows cluster with 3 nodes in it...
Node1
Node2
Node3
I have 4 NICs on each node...
NIC1_Host
NIC2_Virtuals
NIC3_Cluster_HB
NIC4_Live_Migration
This is the config ...
CommunityBot
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0
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Blocking WhatsApp traffic from a specific Country [duplicate]
How can a country block all WhatsApp traffic from a specific country?
22
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answers
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OpenVPN: How to mitigate path MTU issues on a per-client basis?
We have dozens of embedded devices installed at customers, all calling home to our OpenVPN service. That works fine in general, but a few of our customers have severe path MTU issues. Our influence on ...
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Locked server because of IP spoofing
I have hetzner server. Inside this server there is Docker service which inside creates a few containers. Inside this containers I create vpn connections with openvpn. After connection I make some ...
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2
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Under what circumstances is TCP-over-TCP performing significantly worse than TCP alone (2014)?
Many admins keep perpetuating - on ServerFault and elsewhere - how bad of an idea TCP-over-TCP is, e.g. in VPNs. That even the slightest packet loss will make one suffer from at least severe ...
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Using iptables TPROXY instead of REDIRECT
I'm running Debian 8.
I'm trying to intercept all packets, and are currently using iptables for this:
iptables -t nat -A PREROUTING -p tcp -j REDIRECT --to-port 5000
This seems to work, but it ...
CommunityBot
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1
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Display real client IP and not proxy IP with NGINX/NextCloud/PHP
I run a Nextcloud/PHP server through proxy Nginx.
Based on official documentation, I write my own Nginx configuration below (I only display https part because I think that http part is out of scope).
...
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How does real server, direct return server (DRS), reply to client if a load balancer (LB) uses port address translation (PAT)?
Direct Return Server overview:
The DRS allows real servers to directly reply to a client without going through load balancer (LB). The LB ip (VIP) is configured as a loopback (localhost) ip for the ...
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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....
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Subnet mask for 192.168.1.7/30
I want to create two IP addresses, 192.168.1.0/30
and 192.168.1.5.
Adding the first IP for the router port returns this error "Bad mask /30 for address 192.168.1.7":
Router>en
Router#conf ...
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How to determine if a public IP address is in a datacenter or home etc
How can someone determine if a given IP range is in a datacenter or for home usage etc.?
Companies like MaxMind provide lists of IPs located in hosting centers.
How do they get this information?
Do ...
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6
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How to determine the hostname from an IP address in a Windows network?
My LAN has 50 Windows hosts. At the Windows command line I try
ping to get the IP address of a running Windows machine.
The question is how to get hostname of a specific IP address in the same ...
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1
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Netplan - add secondary IP address and assign label
I saw the same question here, but I can't find it anymore. How can I add secondary IP address and assign a label to it via netplan?
I have this netplan config:
# This is the network config written by '...
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1
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apache redirects to local IP on virtual machine
I'm having a problem with my apache setup.
I'm using a Proxmox server with multiple virtual machines and only one public IP.
Apache runs on the Proxmox host and forwards the requests to the virtual ...
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1
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What is the meaning/cause of this extra entry in the output of `ip address` when another device connects to the network?
I was recently trying to set up an EspressIf Border Router for my network. After flashing the device and letting it boot, a single-machine Kubernetes host on my network restarted all of its pods (!).
...
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1
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Changing Subnet-mask
I am working at a school and recently there has been more and more devices that are not getting internet due to dhcp table being full. Pool size of our ip addresses is set to 242, but there are more ...
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4
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Find ISP/IP address by geographic location?
I'm trying to find an ISP or IP address by geographic location, Is this possible?
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