Questions tagged [networking]
Networking refers to the technologies and techniques that enable the interconnection of devices and applications allowing them to communicate electronically.
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Make nginx accept requests only from a specific server
I want to configure an nginx server to accept HTTP requests only from a specific server.
I am not sure if this should be accomplished through the listen directive, or by using allow/deny rules in ...
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How do I make IP address global? [closed]
My server's IPv6 address cannot be accessed on the internet. When run "ip -6 addr", it says "scope link".
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Proxmox VE Dedicated Server OVH - Config Issues In Network Setup With 1 Public IP
Problem: (No Internet & No DHCP)
I cannot seem to get my VM's to connect to the internet nor am I able to setup a DHCP server to automatically assign IPs to them.
Introduction/PSA for dupes: I've ...
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Access to pc on different subnet [closed]
Diagram
I have a win7 PC with two network cards with the following ip's :
1: 192.168.1.239 - from a router with internet access
2: 176.16.12.96 - private network
As on the diagram I need to access the ...
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What does "sudo ethtool -K <interface> tx-checksum-ip-generic off" do exactly? Should I be worried about turning it off?
Recently upgraded to Debian 11 bullseye, and our Docker swarm nodes had trouble talking to each other, and started dropping some connections.
After much Google-ing, we stumbled on these threads:
...
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Dummy interface on bridge2 does not have internet access via NAT
Dummy interface on bridge2 does not have internet access via NAT
Diagram:
On fresh Ubuntu 22.04:
Added dummy interface:
ip link add dummy0 type dummy
cat << EOF > /etc/systemd/network/10-...
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can't ping or nslookup outside the LAN
Ubuntu 18.04 cannot ping or nslookup outside the LAN.
When I do nslookup www.google.comit hangs for a while and returns ;; connection timed out; no servers could be reachedI cannot ping www.google.com ...
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Compute Engine Instance loses network access
I am using multiple Compute Engine Instances and randomly sometimes they seem to be loosing network access. Nothing changed, the certain instance in this case was running about 80 days without any ...
google-compute-engine
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traceroute on server works for one website but not another [closed]
On a server, I used traceroute to both bing.com and baidu.com. The dns server is set to 8.8.8.8. It works for bing.com but not baidu.com.
What might be the cause for the issue? (I suspect this might ...
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Combine MASQUERADING and NETMAP in iptables POSTROUTING
We have some clients (networks) which are connected via VPN to our server network.
Let's say client has e.g. 192.168.0.1/32 and our server network is on 10.1.0.0/24.
So the issue now with this client ...
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34
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Some users see old website [closed]
I have a website: http://rocketer.online/
It's a new website, but it's been almost 5 days since it's set up. Most people can see the correct website, but some still see the default webpage (the ...
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Private IP being used in public DNS [closed]
I recently was working on a problem for a user at work. The basic problem was they had a bank scanner that connects directly to the bank but it wasnt working on our network.
The domain name was usb....
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Duplicate traffic while spoofing an interface
to sum up my issue, I have a linux router that has 3 network interfaces:
a wlan interface acting as a DHCP server, upon which I manage the device, not in the scope of this question.
a lan interface, ...
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issue with fortigate vpn using windows native vpn client: Overlay Controller VPN communication error (Members)
So yesterday we put into production a new vpn connection using a fortigate rugged 30d as the server and a windows server 2016 as the client using the windows native VPN client.
It was working for the ...
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Unable to make bridge interface UP state
I am just learning networking, Pardon if my question does not give all details, I can provide if needed.
I am trying to learn network namespaces in Linux.
I have created two namespaces red and blue
ip ...
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How to properly include vlan configuration for preexisting OSPF routing in PT
I am using packet tracer to simulate an enterprise setting.
There would be a "main" office (marked as Bgta) and other minor offices in other cities, such as Mdlln. In the main office there ...
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Kubernetes located pihole resolves external requests, but does not resolve internal DNS
Problem Summary
√ Yes! Pihole DNS resolves external sites
√ Yes! Pihole DNS filters out unwanted sites
X No, Pihole does not resolve internal requests, such as that for pi.hole on the internal ...
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UDM PRO VPN and different VLANS
I'm running a UDM Pro with 3 USW24-POE which are connected via fibre (OS2) which is running fine meanwhile.
On the UDM there are a few VLANS which are all managed by the UDM Pro.
The Main Lan is 192....
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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....
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Wireguard setup for 1 "master" and many client groups?
I need to separate my Wireguard clients into groups/subnets, but I need one "master-group" (subnet) that can reach all clients.
10.11.2.0/24 BestPizzaShop-Town1
10.11.3.0/24 ...
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How do you set an A record for any shared host?
I'm trying to use an A record to redirect my domain to a separate domain that I own. This process has worked fine with DigitalOcean Droplets -- I just add their IPv4 address in the A record and the ...
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Installation of dual stack k8s cluster on node with only IPv6 network
I am trying to understand if it is possible to install a dual stack k8s cluster on nodes with only IPv6 network. Nodes don't have any IPv4 addressing. I am using kubespray to install k8s cluster but ...
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Simple Strongswan installation caused server to be unreachable through (Open)SSH
While working on a remote machine (Debian 11.7 / Kernel 5.10.0-23-amd64) I have installed Strongswan to configure it as a VPN client.
apt install strongswan
after this, the service strongswan-starter....
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How to do Dpdk binding with bonding interface
In server1(ubuntu 22.04.2), I have 2 physical 10G port : port1 & port2 and their respective interfaces. Now I have another interface named bond0 which has 2 slave interfaces (the 2 physical ports ...
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IPTABLES no internet access from lan with default FORWARD rule set to DROP
I'm trying to set up ubuntu server 22.04 (virtualized) as a router with one wan interface (ens18) and several lan interfaces ens19:ens23 & ens1.
Here is what im trying to achieve:
allow ens19:...
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1
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Cat6e Lan Ethernet Cable - Disconnect when shake in Gigabit Mode. But it is stable when shake in Megabit mode [closed]
I have some problem in network connection. When I shake the lan cable at the wall jack, the connect will disconnect sometimes if the network is running in 1Gbps. But when it ran in 100mpbs, there is ...
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Packet with same src addr with loop back beening dropped
There are two servers with the same VIP, and when one server curls another server, the reply packet (which has src addr same as lo addr) seems to be dropped by the request server. How can I allow it?
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Does dwForwardMetric1 field from MIB_IPFORWARDTABLE represent a sum of route and interface metric?
Documentation for MIB_IPFORWARDROW structure being interestingly vague on this particular point, except for a mention of Windows Vista/Server 2008:
On Windows Vista and Windows Server 2008, the route ...
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Wrong External IP for Real Server Behind Load Balancer
I have a hardware load balancer with multiple Virtual IPs. ie (3.3.3.3, 3.3.3.4).
Behind Virtual IP 3.3.3.3 I am load balancing several web servers.
Behind VIP 3.3.3.4 I have a mail server running ...
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CosmosDB with private endpoint causes 'request originated from VNET through service endpoint' error?
I have a Node Js app which interacts with CosmosDB and which is deployed to a private AKS cluster. I was able to connect to Cosmos DB through a service endpoint in the Cluster VNET/subnet for Cosmos ...
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Forward port to a VM via iptables from same bridge
I have running a proxmox server with two VMs which are connected to the bridge interface vmbr0:
Host: 10.10.10.1 (extern IP: 123.123.123.123)
VM1: 10.10.10.2
VM2: 10.10.10.3
On VM2 a load balancer ...
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When connecting to my server through my domain, I get connection error. however, on a VPN it connects just fine [closed]
New poster here so unsure if this is the correct stack exchange.
But basically, I use NPM (Nginx Proxy Manager) to direct internet traffic to various VMs running on my hub server running proxmox.
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How to configure a podman container to let it communicate with the host as well?
Is it possible to...
run a container with podman
which has an IP on the same subnet that the host is on
is accessible from every other host on the subnet
including the host itself?
I had partial ...
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AWS EC2 - allow traffic to server/site through public IP, SSL certificate issues
We have a Wordpress site which serves as the company intranet. We need to allow an external user to access the wp-login page and subsequently the wp-admin dashboard to manage the site. Would like to ...
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Routing And Remote Access with VPN Installed On Same Server
Setup
I have a Windows Server 2022 with Routing and Remote Access (RRAS) installed.
The server has two (NICs) ethernet ports.
I have the following setup in RRAS.
Ethernet 1 is the Switch -> Server ...
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How to set speed limit per IP in IP range in Ubuntu
What I want:
I've setup a openvpn-server and want the clients in range of 10.8.0.0/21 limit their speed to 10mbit for each IP as a total limit of 100mbit.
wan interface : eth0
openvpn interface : ...
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How can I stop a VM guest from being able to access the host's LAN (and the host itself)?
I'm running an Ubuntu 22.04 host with a 22.04 guest (using Multipass). Currently, the guest can access the LAN and the host. How can I prevent the guest from accessing the LAN, while still allowing it ...
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Elastic IP not working for Network Load Balancer
I have created a Network Load Balancer on AWS with two public subnets. For one of the subnet, I have allocated a static elastic IP. When trying to reach the NLB using the static IP I get ...
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Why is it not possible to establish a connection between these servers?
I have the problem that my two servers (master, worker) can not connect to each other. However, connections outside e.g. "google.com" are possible. I have already tried to allow all ICMP ...
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Map subdomain to local IP through public IP
I want to map subdomain to local IPs on my machine to achieve a IP for each of my virtual machines.
I know I can setup a DNS on my own machine but that will only resolve the domain on my own machine.
...
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share two network interfaces on linux
I have a Linux PC (ubuntu 22.04) with a network layout as below:
Internet <-> Router <-> PC <-> edge device <-> Switch <-> APs <-> devices
And with two Lan ...
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Fork connections out from a single socat connection
I have an old legacy application I’m trying to get to work with our semi-modern network. This application sends log messages as HTTP requests (one log per request) but does so over a single TCP ...
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Devices appearing and disappearing from the network
I have recently noticed a weird problem where clients and servers are only sometimes visible to browse on the network. All connectivity is good, I might add, and all devices can be browsed to by UNC ...
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How private networks enable external networks in multiple network interfaces
In a dual LAN environment on the Rocky Linux OS, we've made one private network from two multi-interfaces. I want to implement the private network so that it can be connected to the Internet network ...
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Force close port 22 on GCP VM
For security reasons, I want to close port 22 (ssh) of my VM that is on GCP.
Currently, if I execute the command telnet xx.xx.xxx.xxx 22 the server responds to me:
Trying xx.xx.xxx.xxx...
Connected to ...
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Linux (Mint 21) Issue with network constantly "changing", interrupts browsing and streaming
I've been having problems with my network on this laptop for ever amen, it was only today whilst troubleshooting an unrelated issue that I ran dmesg -w and saw this constantly repeating:
[437075....
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Some web pages cannot be opened due to timeout on MS Windows
This is a very strange issue related to one (and only) particular PC in our network running Windows 10.
These two web pages cannot be opened on this PC: https://www.chces-soutezit.cz and https://...
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Networking issue in subdomain for two ISP - if one fails and other up
We have a subdomain which is connected through a ISP-A in CNAME. Through subdomain, a Program runs in a local server with ISP A. If the ISP-A is down, then program doesn't run. So we have added ISP-B ...
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Routing decision after IPSec processing
I have a Linux box running in AWS EC2 with just one interface - eht0.
This interface connected to private subnet 172.16.0.0 and has an IP 10.95.114.69 on it.
All hosts from subnet are reachable from ...
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Why is AD DS DNS working only in Host-Only mode between 2 VM?
I'm using Parallels Desktop...
Why when I put:
my ADDS Windows Server VM in host-only
my Windows 10 VM in host-only
from my Windows 10 VM I can join the domain
...while host-only does not allow ...
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