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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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 ...
Oni's user avatar
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Is it possible to "teleport" an IP address of a Windows 2022 Server, mapping it to a different geographical location?

I have a Windows 2022 Standard server on VPS with several IP addresses. I host several websites with my own CMS system, but I have one site that is owned by an American company. My VPS provider, the ...
Zoltán Füzesi's user avatar
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1 answer
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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 ...
denvercoder's user avatar
-1 votes
1 answer
155 views

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 ...
A. Muller's user avatar
3 votes
1 answer
125 views

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 ...
dabo248's user avatar
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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 ...
Samul's user avatar
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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 ...
Kashif Noor's user avatar
-4 votes
2 answers
68 views

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 ...
ahmadreza1383's user avatar
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129 views

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 ...
ift-436t's user avatar
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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 ...
imawful's user avatar
-2 votes
2 answers
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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 ...
hang QAQ's user avatar
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2 answers
350 views

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 ...
user2834566's user avatar
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2 answers
132 views

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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Blocking WhatsApp traffic from a specific Country [duplicate]

How can a country block all WhatsApp traffic from a specific country?
Yaseen Khan's user avatar
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1 answer
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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 ...
Max Frai's user avatar
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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 ...
Tom's user avatar
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1 answer
189 views

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). ...
IssueFindings's user avatar
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2 answers
151 views

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 ...
Mohammed Al Shemmari's user avatar
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1 answer
197 views

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 '...
Semyon Bayandin's user avatar
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1 answer
569 views

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
0 votes
1 answer
37 views

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 ...
xtrose Media Studio's user avatar
2 votes
1 answer
76 views

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 (!). ...
Danny Tuppeny's user avatar
2 votes
1 answer
348 views

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 ...
Nedim D's user avatar
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When I create a bridge and make my ethernet port the bridge's master, what device does the kernel use for sending and receiveing

If I create a bridge and set its master to my ethernet port, how does the kernel send and receive packets? # Create the bridge ip link add name br0 type bridge ip link set dev br0 up # Make eno1 the ...
djshaw's user avatar
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How to Set Up a Server to Route Local and Global Requests to Different Web Servers (Server1 and Server2)

I have 2 Servers (Server1 & Server2) where is each one should have a web application on its own and I have a centralized server (for example DNS Server) The Centralized server receives a URL ...
Hassan Bosha's user avatar
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147 views

converting ip to netplan

I'm trying to convert a set of ip commands to a netplan configuration. I haven't had any luck so far, and I'm not sure why. My script for creating the bridge is: # Create the bridge ip link add name ...
djshaw's user avatar
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279 views

Why are my DNS query responses from Technitium failing to make it back to my kubernetes container?

I've explored every nook and cranny I can imagine, and I can't figure out what's going wrong. I've got a k3s setup on my server where I'm hosting technitium in hostNetwork mode. Technitium is ...
Cabbage's user avatar
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133 views

Proxmox LXC Networking with public IP

I have a bare-metal Proxmox server running with two public IPs. The initial configuration has already been done, and the containers are running with a NAT and a private network. I currently have 2 ...
RobGTX's user avatar
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-2 votes
1 answer
180 views

How to change domains network route to custom IP when curl?

On Linux I do curl to api.binance.com website and it gives me very long ms latency 0.177s, although the server is located just near binance servers. # curl -o /dev/null -s -w 'Total: %{time_total}s\n' ...
sirjay's user avatar
  • 97
0 votes
1 answer
143 views

How to mirror traffic and remove duplicate at destination

I would like to send same trafic over two vpns (udp), to the same server (ubuntu 22.04 with two different WAN interfaces). /-WAN1-> VPN1 client-\ App-server <-> ...
user3604359's user avatar
0 votes
1 answer
127 views

Point-to-point network between three servers [closed]

I have a three servers, each of which has two network ports. I want to connect these servers using point-to-point connections without using a switch. Here is a diagram of what the physical connections ...
ascadm's user avatar
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6 votes
2 answers
1k views

Can a gateway use the network address, or can the network address be anything other than the first number in that subnet range?

We were sent the following gateway info from our ISP: gateway: XXX.XXX.XXX.8 /29 I am Xing out the first three octets for privacy purposes because they will remain the same in a /29 network, and we ...
Rob Pressler's user avatar
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0 answers
211 views

serverside fetch request timeout when request are to an external domain which has the same IP as origin domain

I'm currently running a SvelteKit app within a container which connects to an API running within aother container. Everything is connecting & going through locally using the container's internal ...
Alexandre Villeneuve's user avatar
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0 answers
59 views

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
  • 113
0 votes
0 answers
756 views

Dockerized Nginx Reverse Proxy - Real IP

I have following problem. I have a docker compose setup which spins up a frontend service using Nuxt3 and a backend API based on golang.This two containers are exposed via an Nginx reverse proxy ...
Sol's user avatar
  • 1
0 votes
1 answer
74 views

Change DHCP range and tcpip connections

I want to change the dynamic range of my DHCP server for a network e.g. it is at the moment from 192.168.0.2 to 192.168.0.100 I want to move it from 192.168.0.101 to 192.168.0.200 but I don't want to ...
AAB's user avatar
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300 views

Can't see udp packets with nc command, works with tcpdump

I'm trying to capture UDP data using the nc (netcat) command but it doesn't output anything. What options/parameters do I need to pass to the nc command to get the output? tcpdump does show the UDP ...
Martijn de Munnik's user avatar
-1 votes
1 answer
153 views

Assigning static WAN IPs

My ISP gave me a /27 of IPs. Basically, they gave me the following information. Network: 1.2.3.64/27 Gateway: 1.2.3.65 IP Range: 1.2.3.66-94 Netmask: 255.255.255.224 To deploy this, I want to give ...
Kol's user avatar
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1 vote
0 answers
64 views

How can I see the IPs of the computers that queried my Azure OpenAI resource via the Azure OpenAI API?

I created several Azure OpenAI resources in my Azure account. I deployed GPT models in each of the Azure OpenAI resources. I access them via the Azure OpenAI API. How can I see the IPs of the ...
Franck Dernoncourt's user avatar
0 votes
1 answer
54 views

requests from different web sites are egressing from the routing src ip not assigned ip

I have dedicated server from OVH, that has 40 ip addresses on three routes. ip route show default via x.y.z.254 dev eno0 a.b.c.0/24 dev eno0 proto kernel scope link src a.b.c.161 x.y.b.0/24 dev eno0 ...
Shreef Entsar's user avatar
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0 answers
187 views

After setting manual ip address with network manager cli, ssh connection closed and no longer accessible

Context I have been trying to set my docker containers to each use a separate ip address, rather than opening multiple ports on the same ip. My system (Debian Bullseye) uses Network Manager to manage ...
imclerran's user avatar
0 votes
1 answer
62 views

"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: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen ...
Vladimir's user avatar
  • 179
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0 answers
36 views

Intermittent workstations with no network connectivity

I have a campus wide network with ~10 workstations around campus(not from the same switch) that can't connect to the internet/network, they are successfully acquiring an IP address from the DHCP ...
Skipbo's user avatar
  • 11
0 votes
0 answers
45 views

How to verify XFF_IP is from a known Proxy or CDN while enforcing key in Google Cloud Armor Security Policy?

I'm currently working on a project where I want to apply rate limiting at the load balancer level to each user's IP address. The idea is to throttle any user that crosses a certain request limit in a ...
Aviral Srivastava's user avatar
0 votes
1 answer
161 views

What subnet mask to use for a virtual IP in pfSense

I have a subnet 192.168.0.0/24. I want to create a new virtual IP address (VIP) in pfSense at 192.168.0.2. What difference does it make what subnet mask I use for the VIP? Should I set the VIP to 192....
lindhe's user avatar
  • 136
0 votes
2 answers
75 views

What is the origin and meaning of the shorthand "[::]:25" when refering to an ip address and port number

Sometimes when working with certain libraries or applications that listen on a given port I will receive a log entry that looks like the following: [2023-07-17 19:04:36] INFO SMTP Server listening on ...
joeldesante's user avatar
0 votes
1 answer
178 views

Is my traffic to my Synology leaving my network?

I have a Synology DS723+. I currently have it port forwarded and set up using the Synology dynamic DNS service. It works great, I can access it from outside my network with no problem. However, I ...
Jackson Zamorano's user avatar
1 vote
0 answers
195 views

How to make secondary IP routable

I am trying to assign a secondary IP to my primary interface. I added the IP to my eth0 interface ip addr add 172.20.14.253/21 dev eth0 $ ip a show dev eth0 2: eth0: <BROADCAST,MULTICAST,UP,...
Hussain Nagri's user avatar
0 votes
1 answer
362 views

Listening on all interfaces, multiple servers

I have a server listening on all interfaces for a port (using go net.Listen("tcp", ":{port}")). I also have backup server with the same code, to start if first server fails. Both ...
Lovish Puri's user avatar
0 votes
0 answers
91 views

ping reports not receiving any package while tcpdump logs echo replies

INTRO: There's an IPIP tunnel (call it megatun0) to a machine connected to a private network. The megatun0 tunnel is bound with the address 192.168.15.1. One of the network interface on the machine ...
Some Name's user avatar
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