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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AlmaLinux 8.10 VPS hostname keeps getting overwritten, probably by NetworkManager
On AlmaLinux 8.10 ....
I am trying for over 12 hours to change hostname permanently so it does not change back when I reboot. Very frustrating.
With most servers it works with hostnamectl set-hostname ...
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11
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Getting 'we cannot identify ourselves with either end of this connection' on IPSec connection with a gateway
I'm trying to set up a VPN connection using IPSec between a VPS and a remote network.
The exact setup worked before but this server, for some reason which I guess might be having cPanel installed, has ...
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How to receive a copy of the outgoing HTTPS traffic from a box and handle it with a custom listening server, while preserving the original one? [migrated]
to make the subject clearer, I have a closed-source energy meter in my house. The box sends small datapoints out via HTTPS to the manufacturer cloud where I can access it (instant readings and ...
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increase bandwith of vps with boundig or merge bandwith of another server [closed]
Good day. I am a VPN service provider using your infrastructure. I have an IP that is whitelisted in my country and has no restrictions imposed by the Iranian infrastructure. The issue is that my ...
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Project Ideas Focused on Network and Security for Enterprises [closed]
I'm currently looking for project ideas that focus on network infrastructure and security for enterprises.
If you have any ideas, recommendations, or experiences in this domain that could guide me, I ...
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34
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accessing internet from both linux board and linux vm on windows [closed]
I have a windows host that has direct Wi-Fi internet access, a Linux vm running on VMware on the same machine and a Linux board connected with Ethernet to Windows host as well.
Requirements:
I want:
...
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404 Error ONLY When Accessing API via Subdomain on APN telefonica.es
I have a web application setup with the following infrastructure, and I'm encountering an issue that I hope you can help me resolve. Here is an overview of my setup:
Infrastructure Details:
The ...
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Connect digital signage server [closed]
I want to use my Navori Digital Signage server with my other computer in the LAN.
I tried using the IP address of the computer but still not able to access.
Any Help!
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Setup of new Mikrotik router to act as a switch with WiFi enabled [migrated]
I have a Mikrotik router and need to connect a new Mikrotik router to the first so that any ethernet that is connected to the second Mikrotik router behaves as if it is connected to the first router, ...
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Interface bonding with four interfaces and a 40G Dell switch
I have the following setup.
Two dual-port 10G network adaptors, for a total of four 10G interfaces on Linux (Debian 12), named enp9s0, enp9s1, enp26s0, enp26s1.
Dell S6000-ON 40G switch with FTOS ...
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Issue understanding subnetting and connection issues
I am in the process of planning a network overhaul and have run into a small problem with my logic.
I have setup a new VLAN in our VMWare, switch and firewall, and deployed som virtual machines for ...
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Emulate multihost traffic on localhost
I have app A and app B that communicates over tcp. I have no control over A, but B is my app (C++ with asio). I want to test the communication between them on localhost, however app A seem to handle ...
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Overlay networks using VXLANs
I have the following connection diagram:
I’m trying to share the same broadcast domain among the end devices using VXLAN.
The configuration I’m using is this:
SERVER 1:
ip link add vxlan10 type vxlan ...
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Not able to request docker container using eth1 interface IP
I have a vps on ec2 instance, It has eth0 interface by default and I have set up the eth1 interface on it by editing the yaml file and doing netplan apply, so the ip rule and ip route were added. I ...
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Solved - Fedora host, Windows guest (QEMU/KVM): NAT'd virtual bridges work except this one (USB/Ethernet)
Quick overview of the situation
I have a Fedora host on which there are multiple NICs and VMs (QEMU/KVM/LibVirt). Each guest accesses the internet via a virtual bridge that operates in NAT mode and ...
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DNS could not resolve selected hosts only
I have a problem on all machines in the network resolving specifically analytics.google.com host. I should state that every other host resolution works fine. I've tried using multiple different DNS ...
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How to add youtube into ip rule list?
Ordinary websites can be added by the command:
ip rule add to <site ip> table <some table>
But how can i add youtube rule?(for my table) Youtube has got great deal of ips.
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Hyper-V guest network adapter disappears after restart
The Hyper-V network adapter inside a VM disappears after restart. It does not appear in Device Manager and networking doesn't work.
If I add a new network adapter in the VM settings it shows up live ...
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Server A not receiving UDP traffic on port 5060 from Server B
I have sip traffic which needs to flow bidirectionally between server A and server B on port 5060.
I have tried running netcat on both the machines
Netcat from machine A to B:
========================...
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Proper value for dns search in /etc/resolv.conf and how to set it
On RockyLinux 9.x I noticed if my server hostname is mysite.com then inside /etc/resolv.conf by default I would have
search com
nameserver 8.8.8.8
nameserver 1.1.1.1
Isn't search com a security ...
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How to expose EKS application on 2 VPCs
I have an EKS cluster running in one VPC with corp network traffic only. I have my application exposed with an ALB (using AWS Load Balancer Controller w/ k8s Service + Ingress) using TLS. I have ...
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Homelab Custom Domain [closed]
I just set up my first home lab, and really enjoying it. Currently, I access all of my services in the browser through their IPs.
How would I set up a domain name? I actually have an entry in my host ...
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Curious mystery - local ping traffic takes down internet connectivity
I have several devices on my network that are setup to ping the router every minute (they run ping 192.168.1.1 in a chron job). The router is a Ubiquiti Dream Machine.
Somehow, this is causing my ...
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Connect two networks over a VPN connection linux
I need to connect two networks over a VPN. On each network I have a linux machine that connects to a VPN server on the Internet.
Client A:
local 192.168.5.5
vpn: 10.0.0.5
Client B:
local 192....
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Troubleshooting Sudden Drops in Home Network Speed [migrated]
I'm having problems with my home network and looking to hopefully get some advice regarding this.
Setup:
1Gbps connection from my ISP via fiber. ONT is in bridge mode. After the ONT i have my main ...
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Hyper-V and ESXi VLAN Tagging not working properly with AOS on CX6000
I am struggling to get a VLAN setup working in our physical test rack.
It should actually be a very simple setup -no routing, just a single switch with VLANs to separate networks.
The switch is an ...
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Do TCP sequence numbers increase by the Ethernet frame size, or tcp payload size?
Have Googled this but it's difficult to word this without getting irrelevant results.
The TCP sequence number increases by "how many bytes were sent".
Does this mean literally the entire ...
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MOXA Web UI issue with VPN MTU lengths?
When I access the MOXA switch (IKS-G6824A-20GSFP) web UI locally (within the subnet) and navigate to the VRRP configuration page, it works perfectly:
Web UI Screenshot
However, when I use an OpenVPN ...
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How to config DD-WRT as second router to host iot devices to be accessed by VPN [migrated]
I have a spare router (TP-Link C7 AC1750) that I installed dd-wrt on. It is configured to run in router mode, with LAN DHCP (self is 192.168.8.1 assigning ips from 192.168.8.2 to 192.168.8.51). Its ...
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How to configure ports and ensure proper traffic flow in a Layer 2 switch snake test
I am trying to perform a Layer 2 switch test using a snake test. My topology is as follows:
There are two computers and four switch ports.
Port 1 and Port 2 are in VLAN 10.
Port 3 and Port 4 are in ...
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Sriov VF Link Aggregation is not Working Properly with Bond Mode 802.3ad
Below is the Configuration I am trying to create.
Host and Switch Config
On host side config which is SRIOV NIC base device.
Host has two physical port and for each there are 4 vfs created.
On switch ...
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Some return TCP packets from VM are not MASQUERADEd correctly
I have a problem where some packets that pass through libvirt's default NAT network seem to skip the MASQUERADEing.
My setup is as follows:
I have some hosts that are on the
10.254.1.0/24 (Openstack) ...
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How to monitor bandwith drops & connection losses?
My ISP currently seems to have a routing problem to certain servers/regions within my country whereas most of the connections generally are still fine. I can mainly notice this by extremely slow ...
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Can't see my public IP in traceroute [closed]
From this traceroute:
% traceroute google.com
traceroute to google.com (142.250.201.78), 64 hops max, 40 byte packets
1 192.168.1.1 (192.168.1.1) 5.003 ms 3.689 ms 3.323 ms
2 100.64.128.1 (100....
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How do I configure a second WAN port to connect to a /29 network provided at a Data Centre?
The data centre are providing a host range (xx.xx.xx.204)-(xx.xx.xx.206) with a network: xx.xx.xx.200/29) for internet connectivity.
I can connect one of the three physical ports we have been provided ...
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Docker containers with distinct IPs connecting to localhost process via TCP - docker network setup
I'm not sure if what I'm trying to do is impossible. I've seen that containers on an ipvlan network can't ping underlying host interfaces due to a Linux security feature, but I don't know enough about ...
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Intermittent Network Printer Issues with Kyocera Devices Across VLANs
We're experiencing an intermittent issue with our network printers (primarily Kyocera) in our company. The problem is that the printers randomly stop working for certain users on a day-to-day basis. ...
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Routing traffic between 2 routers
This is roughly the network infrastructure as of now
As you can see I have two routers/firewalls in Nethserver and OpnSense (This is newly installed with the new ISP).
Nethserver LAN's subnet is 192....
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Setup Hetzner VPS to use another Hetzner VPS as internet gateway - `Error: Nexthop has invalid gateway`
I have two VPSs on hetnzner, they are both on a public network and a shared private network.
A = 10.0.0.3
B = 10.0.0.2
I'm trying to setup A as an internet gateway for B
So on A I ran:
...
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Connection lost, never recovers after adding interface to bridge
My connection is lost when I add an interface to a bridge. Here I want to add eno3 to bridge kvbr0:
sudo ip link add name kvbr0 type bridge
sudo ip addr del 10.120.224.70/23 dev eno3
sudo ip addr add ...
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How to connect gns3 simulated network to my physically existed network
I have a VM existing in one network and a c3660 R1 router in a different network within GNS3. I would like to establish connectivity between router R1 and my VM.
The details for the VM and gns3 R1 ...
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How to make TUN device accept incoming packets?
I'm working on the simple VPN server project for iOS.
iOS sends intercepted packets to Go server with UDP connection, then those packets are injected into the TUN device.
Go server workflow:
Create ...
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How to allow nomad docker containers access to internal network while allowing for zero downtime deployments?
I'm using Hashicorp Nomad to orchestrate Docker containers, and I'm facing a networking challenge. My current setup uses host networking (network_mode = "host") in the Docker+Nomad job ...
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Time synchronization between Ubuntu (America/New_York) and Windows (SGT) using w32tm
I'm trying to synchronize time between an Ubuntu server and a Windows PC (set to Singapore Time, SGT) using the Windows Time service. Here's my setup:
Ubuntu server: Running as NTP server (set to ...
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A handful of ip addresses at a specific hosting company are not accessible from one location
I am reaching out here to see if anyone has ideas as to what might be happening on our network.
My assumption is that it is a routing issue at our ISP but, since that is a neigh impossible problem to ...
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Getting gateway in bridge mode on a linux VM guest through a windows host
I have a SFP GPON ONU which I want to get it works in a OpenWRT VM on a Win11 host (VMWare Player).
Once the SFP module connects to the tree, it goes in bridge-mode.
I'm not sure this particular mode ...
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Error when launching an instance in OpenStack (I just configured a self-service network)
PROBLEM: We deployed OpenStack in a cluster and until now we could launch instances using a provider (flat) network. Today we configured a self-service network to be able to use vxlan as well, ...
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All files in Azure volume corrupted, with .00000001 appended to the end of the filename
Two days ago, a network storage disk appeared to be infected in an unusual fashion.
All of the files (thousands) on our backup volume in Azure have been corrupted, with ".00000001" appended ...
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452
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SSH connectivity issues between local server and remote server
On a production server, I have automated task that send the same SSH commands and amount of data over the wire once a minute to a remote production server. The only thing that may change is a few ...
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Check which VMSwitch is WSL2 effectively using
I have Windows 11 running Ubuntu 22 under WSL2.
In WSL2, a VMSwitch can be configured via .wslconfig on the Windows Host, or via /etc/wsl.conf inside the VM. This is used for bridging, and maybe for ...
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