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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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Wireguard server without masquerading and clients in internal IP subnet

I am trying to set up a wireguard server, so clients can access local fileservers. Which I managed with masquerading activated on the wireguard server. But instead we require now that the clients get ...
samurro's user avatar
0 votes
1 answer
96 views

Bridge network for qemu KVM is not activated

I am creating a kickstart for Rocky 9.3 for deployment. These hosts will have virsh (qemu) to host multiple VMs per host. All these hosts have MAC based DHCP for ens9f0. I am using below to create a ...
Amin Persia's user avatar
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0 answers
26 views

How to connect to a server on a local network using an external domain name? [duplicate]

I have domain "example.com". The Internet router (192.168.0.1) forwards specific ports to a router within the network working in WISP mode (192.168.1.1 / 192.168.0.123). That router has a ...
Reverent Lapwing's user avatar
1 vote
0 answers
25 views

Can GoBGP or FRRouting provide real-time BGP announce message?

Our old BGP monitor system uses ExaBGP to collect real-time BGP announcement messages. This system is usually installed in a Linux agent which will become peers of many other routers/switches, so that ...
Chengyuan Zhang's user avatar
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29 views

Packets sent to tun Interface not received by Application

i have been stuck at this problem for quite some time and just can't figure out what I am doing wrong. What I am trying to achieve is to intercept packets (IP and TCP), change their header and then ...
Vollidiotischer's user avatar
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25 views

How to determine destination for UDP packets, at proxy server? [closed]

I need to route TCP and UDP packets via a proxy server, at layer 4 (i.e. without TLS termination, for TCP packets). The destination address for all packets is not fixed. In other words, the routing ...
geekyrits's user avatar
-1 votes
0 answers
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Repeated file system corruption and CHKDSK on Hyper-V guests

After every restart of our Hyper-V guests, CHKDSK runs automatically. We have discovered corrupt files, some 0 kb in size. This occurs at multiple customers who utilize different hardware ...
TechSavvyAdmin's user avatar
1 vote
0 answers
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mysql threads connected more than processlist and established connectios [migrated]

Recently we have been facing an issue with MySQL. We use Percona MySQL 8.0.21 and set max_connectios to 7000. Sometimes in peak times, we reach 7000 connections and when we run show status like '...
Ssaf's user avatar
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1 answer
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How to disable Network Interface for SSH?

In my linux machine, I have 10 network interfaces available like eth0, eth0.67, eth0.70, eth0.97 etc,. When i run the command nc 160.48.249.170 22 to check, i get like below: root@icon:~# nc 160.48....
Karma Yogi's user avatar
2 votes
0 answers
78 views

GCP VM networking issue - communication between vms

i am more Java developer than a system/cloud architect, yet i am stucked in position from which i see no way out. On Google Cloud i have custom network named t with subnet t-eu which has a primary ...
Marky012's user avatar
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1 answer
186 views

How to put multiple VMs behind a single *private* IP address on Azure?

I'm working on creating a Blue/Green deployment for a product in Azure but I'm running into a problem regarding outbound traffic to an on-premisses database. Our initial idea can be seen in this ...
Leonardo Tavares's user avatar
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Network error:kex_exchange_identification: read: Software caused connection abort banner exchange (SSH)

I met this issue while trying to clone a repo in a gitlab private server, so I added verbosity and tried to connect to it first here is the output $ ssh -i test -T -vvvv [email protected] ...
ayman cheddad's user avatar
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0 answers
48 views

mongodb save speed slow server-client

I am connecting a lot of clients to servers. I need to be very fast as it saves instantly to the mongodb database. When the client is connected to the server using the loopback address (127.0.0.1), ...
ali koc's user avatar
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0 answers
30 views

KVM guests lose connectivity after host network restart [closed]

I have problem, but I cannot work out the solution: KVM guests lose connectivity after networking restart All KVM guests lose network connection PERMANENTLY when the host's network is disconnected, ...
13fcali's user avatar
2 votes
1 answer
37 views

How to setup routing to the tun interface from an interface that is receiving tagged frames

I am configuring a Raspberry Pi to route traffic from a specific VLAN through a VPN, but I am encountering routing issues. Here’s an overview of my setup and the problems I'm facing: Setup: Raspberry ...
Aleksei's user avatar
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0 answers
51 views

Azure Files connection lost to FsLogix Profile VHDX (Kerberos Authentication)

The Setup: We deployed 2 multi-session host VMs with NVIDIA GPU and 110GM RAM (CPU SKU = NC16as T4 v3). Session hosts (pooled AVD config) are Entra ID joined and receive policies using InTune. ...
dan's user avatar
  • 279
-1 votes
2 answers
65 views

Is there a free rocky linux monitoring tool? [closed]

I am currently looking for a tool to monitor the performance of two Rocky Linux desktop computers. It should monitor aspects such as the CPU, RAM, disk, and network usage (similar to the Windows Task ...
floriandev's user avatar
-1 votes
0 answers
50 views

Access remote server from Host through VPN while OpenVPN runs in docker container

I'm using Docker Desktop on Windows with WSL2 backend, and I'm having hard time trying to reach server accessible through VPN, in the situation when: OpenVPN runs in the container I want to reach ...
kamsec's user avatar
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-1 votes
0 answers
54 views

(pfSense NAT) Cannot reach NAT device on same subnet through WAN address

To preface, I am using pfSense to manage my network. The subnets listed below are separate physical networks on the pfSense. 10.99.99.0/24 is LAN and 10.69.69.0/24 is DMZ. On the pfSense I have pure ...
vaughngx4's user avatar
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0 answers
18 views

DNS_PROBE_FINISHED_NXDOMAIN and ERR_ADDRESS_UNREACHABLE intermittently

I have a website (greatsistema.com) for internal company use that we use from several locations. Intermittently at 1-2 branches (different locations) the site goes down with a ...
Silver Lora's user avatar
0 votes
1 answer
31 views

NFS4 client only writes either 4kb or 128kb of data

I have a Debian NFS4 server that exports two volumes and several tens of Debian clients using these shares - mounted rw. Recently I noticed that some of these clients get into a strange state: When ...
michalt's user avatar
  • 11
0 votes
2 answers
49 views

Wordpress and MySQL on same EC2 instance, different subnets. One public one Private

My goal is to have a single EC2 instance containing both WordPress and its MySQL database on same VPC and have the WordPress available on the public subnet and MySQL on the private subnet. The purpose ...
manoman687's user avatar
0 votes
1 answer
27 views

Hyper-V: Is it possible to use Azure IP with a local VM?

Would it be possible to use an Azure Public IP (for example) and somehow associate it with my VM on my server (not hosted on Azure)? I'm quite new to networking and I'm not really sure if what I am ...
Anonymous's user avatar
0 votes
0 answers
29 views

How can I give multiple KVM bridges access to Docker containers?

I'm running Docker CE 25 on Ubuntu Linux 22.04. I have numerous KVM VMs routing ip through bridges br25 and br50. All of these components reside on the same host. This issue has also been reproduced ...
me2017's user avatar
  • 31
-2 votes
0 answers
29 views

Increase shared vpc (host project) limit to 500

Our Organisation is having more than four thousand applications and we may have more than 200 (roughly) Business units under which these applications are grouped together. Our current strategy creates ...
Santosh Pattnaik's user avatar
0 votes
0 answers
17 views

Change Hyper-V IPv6Connectivity

I am trying to test IPv6 on a Hyper-V VM instance in Windows 10. IPv6 is enabled on my network, and working on my host machine (e.g, ping -6 ipv6.google.com is fine). However, in my VM, ping -6 does ...
shea's user avatar
  • 1
0 votes
0 answers
37 views

Unable to join EC2 worker to VirtualBox master

Im deploying a Hybrid Cloud(VirtualBox-AWS) Kubernetes cluster. What I have done so far: Set the control-plane on Ubuntu Server 22.04 LTS via VirtualBox 6.1. Change network adapter to bridged Ran the ...
Mabadai's user avatar
  • 101
0 votes
0 answers
14 views

Proxmox linux bridge has binded ip which not works 50% of time

I have default proxmox install on Vultr baremetal server It has bridge like this root@ed2:~# cat /etc/network/interfaces auto lo iface lo inet loopback iface enp1s0 inet manual auto vmbr0 iface ...
arheops's user avatar
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0 answers
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Internet Facing load balancer infront of 2 private instances

I am trying to setup 2 web instances in a private network and put an internet facing load balancer infront of my two instances. This is what i want to achieve: The 2 private instance should be able ...
Mervin Hemaraju's user avatar
0 votes
0 answers
24 views

Can't resolve service in Kubernetes

I have a pod that wants to connect to Redis, but we use dragonfly instead, but it can’t do that. [2024-04-01 14:34:28.421 DEBUG common_server/src/db/redis_manager.rs:112] creating redis pool with ...
Moonlight's user avatar
-1 votes
1 answer
42 views

MC888 5g router with Google WiFi puck and coax extender [closed]

Very weird/specific issue here. I'm in a rural spot and use mobile broadband. I have a 4G router currently that is about 300m from the house. It is connected to my Google WiFi router via a coax ...
Rolf Herbert's user avatar
1 vote
0 answers
110 views

Is there a way to disable all internet access while having ssh open on a docker container

The end goal is very simple. Open up SSH port 22, but disable internet: I can ssh into the docker container, but I can't do anything that requires an internet connection (download packages, curls ...
Realman78's user avatar
0 votes
0 answers
17 views

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 (...
hummorrrflov's user avatar
0 votes
0 answers
81 views

How would I completely reset network to after-fresh-installation status from Debian installer ISO?

I need to completely reset my Debian VM's network side settings and configuration back to the state of a fresh installation. How can I do that with a Debian installer ISO? I was able to boot into ...
Max's user avatar
  • 1
1 vote
1 answer
67 views

Wireguard not routing incoming traffic

I have Wireguard setup as a VPN on my Server with my Phone as a peer. Routing on the Server it self works without a problem, but it seems like all the traffic coming from my Phone is just ignored. ...
isi_ko's user avatar
  • 123
0 votes
0 answers
48 views

What to check on what is blocking my open port on Debian?

I would have posted my attempts but I currently do not have access to this Debian VM... (see related question How do I get myself out of docker hijacked network situation on my Debian VM?) Anyway, the ...
Max's user avatar
  • 1
-1 votes
0 answers
50 views

How do I get myself out of docker hijacked network situation on my Debian VM?

I ran into a problem with wg-easy docker in trying to set up Wireguard using docker on my Debian VM so I changed network_mode to host as a last resort without learning about the consequences... The ...
Max's user avatar
  • 1
0 votes
0 answers
30 views

Connections blocked between 2 servers at the same ISP - my fault or hosting company's?

I have 2 dedicated servers at ionos.com, and old one I am trying to abandon and a new one I am trying to migrate to. In the process of migrating, I discovered that I am unable to connect between the ...
uncovery's user avatar
  • 345
0 votes
0 answers
22 views

OPNSense: How to communicate with second network that also act as backup WAN

Drawing: https://i.stack.imgur.com/QjM3a.jpg Hello. I have two networks with different subnet (please refer to drawing). First network is 192.168.1.0 and second network is 192.168.2.0. The OPN Sense ...
user321280's user avatar
0 votes
0 answers
15 views

Bind9 custom rules no answer across subnets

I have a few different local subnets and some apps that I'd like to access with a custom DNS server. I have bind9 setup on 10.0.0.0 subnet and all of the devices on that subnet work as expected. When ...
svey's user avatar
  • 1
0 votes
0 answers
37 views

Mixed 10Gbps/25Gpbs on Supermicro AOC-A25G-b2SM (BCM57414)

Working on installing some new Supermicro servers and they're configured with a AOC-A25G-b2SM NIC (2xSFP28 ports). Based on what we can support with our switches, we were planning to do a primary link ...
Chris's user avatar
  • 1
-1 votes
0 answers
43 views

Windows Server Hyper-V host Ubuntu guest network down until restart after incident

I have a Windows Server 2022 host with Hyper-V installed. There are two Generation 2 VM's installed, Ubuntu 20.04 and 22.04 LTS servers. Host machine has a network configuration that looks like this: ...
FearDC's user avatar
  • 11
-1 votes
0 answers
29 views

Can't access my server when connected to company's VPN

So I hosted a website on a server inside the company network. I could access it through the company's VPN and also without VPN (from within the company). I installed Nginx (and ufw) and after a few ...
Mazhar Ali's user avatar
-2 votes
1 answer
147 views

Proxmox host and VM running on it see different machines on their network using the same connection

I have run into a weird issue when setting up a new Proxmox host with a VM on it which I wanted to connect to our dedicated storage network running on a separated switch. The setup is the following: ...
heeeresjohnny's user avatar
1 vote
0 answers
47 views

Hadoop + warnings as slow block-receive from data-node machines

We have Hadoop cluster with 487 data-nodes machines ( each data-node machine include also the Service node-manager ) , all machines are physical machines ( DELL ) , and OS is RHEL 7.9 version. Each ...
King David's user avatar
1 vote
1 answer
31 views

Accessing azure internal container app though P2S vpn connection

I'm a little new to azure networking so this might be obvious but I'm kind of stuck. I've created an azure VNET. Inside that I've setup a P2S gateway which seems to work fine. I can connect to it and ...
Monk's user avatar
  • 11
0 votes
0 answers
36 views

Adding Aruba switch to monitoring tool via SNMP protocol

I am trying to add few aruba switches to a monitoring platform observium but failing to do so. the coumminity string and the trap address are perfectly fine but it doesnot seem to work. It would be ...
biplab 's user avatar
0 votes
0 answers
58 views

K8s - not working L2 Advertising of Metallb

I'm installing 1 node k8s cluster and can't reach metallb IP address from same subnet. CRI = Containerd 1.6 CNI = Flannel. control-plane taint is disabled Pod CIDR = 10.244.0.0/16 Cluster CIDR = ...
SeanCooper's user avatar
0 votes
0 answers
65 views

dns problems in self managed aws ec2 cluster with aws-vpc-cni

I'm new to k8s and I've been trying to learn it. I faced a problem with trying to setup aws-vpc-k8s-cni on my fresh k8s cluster with coredns. Here's the problem in detail. Cluster & Network ...
Ayush's user avatar
  • 111
0 votes
2 answers
89 views

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 ...
Kaspar's user avatar
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