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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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How can I route certain ips so that they don't go thru Wireguard?

I have a computer that occasionally connects to a remote Wireguard server to access the internet via its IP. Also, there is a DNS Server (PiHole) in my local network (at 192.168.2.40) that I use ...
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Exchange server via TailScale (Wireguard) and creating valid certificates

Here is the scenario. Exchange server runs on a lan. Clients interact with the server via ActiveSync over HTTPs connections served by IIS. IIS is using a cert with SANs that are appropriate for the ...
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Specify different broadcast IPs for different Windows machines

I run some high-frequency trading software from home across multiple accounts. Sometimes during very volatile conditions, I run into issues with rate limits restricted by IP address. I was assuming I ...
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Figure out ways to forward traffic through proxy for Home network from external 3rd party

I noticed all my traffic goes through one ip address which seems a proxy and this proxy is not set up neither by me or my provider (I contacted them on this issue). I want to figure out who and how ...
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Network Configuration At ISP. Router vs Switch

Hoping actual IT folks can help me out. I’m standing up my own enterprise network for the first time. We are a heavy construction company so our tech skills are pretty limited. I have 5 static IPs ...
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How to view current PHY master-slave settings in Linux (Centos Stream)

I am trying to view the current master-slave settings on my network cards (HPs with Intel controllers). I see ethtool has the master-slave option to set the mode, but I didn't see how to view the ...
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How to configure ISP IP address to esxi host?

I just bought a server for my organisation and installed vsphere esxi and i have installed windows server inside esxi host , and also i got an IP address for Internet from ISP, now i want to ...
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Wireguard Client to Client issues

Server: Ubuntu Wireguard server all clients connect to Runs SMB share: all clients can access when the VPN is connected Clients can ping eachother Client a: Windows Server 2022 Firewall: Allow 192....
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How to reduce the time it takes a request to pass from a ALB to the actual Fargate Server?

I have a webhook endpoint where our service provider send a payload which I have to respond to within 2 seconds. I've been getting way too many timeout errors from the service provider, meaning I wasn'...
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which K3S ports should (not) be exposed on a public interface

The K3S documentation explains which ports are required for this kubernetes distribution to work. What it does NOT explain is, which of these ports are OK to be open on a public interface. K3S seem to ...
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I want to test IGMP capability of a OpenWRT based router. How caan i test?

This is what I want to test out, SEE IMAGE: Router connected to users and is accessible over the internet as well PC1 and PC2 should be able to join some group(s). Should be able to leave group as ...
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Content of checkpoint backup with extension tar.gz

I have a Checkpoint Firewall backup file with extension tar.gz. When I uncompress the file, I see that there are several directories and files. One directory is called config. Questions Is this ...
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How to use IP pool [closed]

I am just beginner, I just want to setup my mini data center and for testing i get a FTTH connection and /30 ip pool, ISP reply is something like that, "IP Pool 103.15.xx.xx/30 has been assigned ...
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nginx and httpd. (99: Cannot assign requested address)

i have a dedicated not managed server and use centos7 as OS, after a reboot and a new secondary ssd on my server, the httpd and nginx services no longer start. the ips configuration was not touched ...
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How can I assign same private IP 10.3.3.51 to two azure vm having differnt MAC address? only one vm will be providing service at a time

I have two vms behind the Azure Load balancer working as High availability that is only one vm is providing service at a time, other vm will be in passive state. I want to keep same IP address 10.3.3....
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"ping" fails when running from google- cloud on specific IP

I'm trying to access www.fastlane.co.il trough google cloud servers. I got the IP 81.218.67.65. When i ping it locally on my computer it works fine. Local results: Pinging www.fastlane.co.il [81.218....
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I need to figure out how to buy a used server. What is the thing called that pulls out from a stack server an has a screen on it an keyboard?

I want to buy the computer that technicians use to repair or configure stack servers it looks just like a laptop but has hot swappable harddrives. I'm entering a i.t. program an I'd like to mess with ...
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Load balancing ISPs without double NAT

I configures my TP-Links ER605 multi-wans router to load balance between my two ISPs (that is working). But since my Web/NAS server is behind my router on the 192.168.2.0 network, any computers on ...
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Set Zyxel XS1920 as unmanaged switch

I have a Zyxel XS1920 smart managed switch https://www.zyxel.ch/de/support/download/201962_1/ I want to use it as a (very fast) unmanaged switch; like a QNAP QSW-1208. So I don't need it to be smart, ...
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Openvpn and routing for outside

I installed openvpn on my router. Everything works great. But, when the tunnel is up, my router is no longer accessible from the outside (I have a "white" dedicated address). Packets get to ...
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Creating a gsm (LTE) connection without APN in NetworkManager

I work with a device that has an LTE modem, which has been working properly so far for many users out-of-the-box without having to configure its APN - this is not the case for all users, some of them ...
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How to enable TUN in Ubuntu running in a docker container

So basically I'm running an Ubuntu container in docker, with the host system running Ubuntu Server 20.4 LTS, and the container running 22.4 LTS. My intended goal is to have a container to download ...
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How to enumerate/scan for private dns subdomains through a VPN connection

I need to enumerate/scan a target IP address through a VPN on a private network. The target has an apache web server on port 80. No DNS server is available for the target since it is on the Hackthebox ...
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Secondary IP not pingable from internet - Ubuntu 20.04 using netplan on Hetzner server

Let me start be saying I'm not an network expert. That being said, I'd need some help here as I'm breaking my head on this issue for two days now. I have several questions but will focus only on one ...
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NGNIX enforce HTTPS

for my Webapp (Angular App) we are using NGNIX as web server. I have a task where I need to make sure all assets/images are loaded over HTTPS. In the Browser Dev tools, I see the request is sent over ...
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IPv6 access to site behind OpnSense

I am new to IPv6. I have dedicated server with both IPv4 (single external IP 135.x.y.z) and IPv6 network 2a01:abc:def::/64). Within this server I have few VMs and 2 networks (WAN and LAN). OpnSense ...
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Is it possible to terminate ssl between servers behind haproxy, using the existing haproxy's ssl termination

I have an haproxy server doing SSL termination for traffic from the internet and a domain name GitLab.private pointing to it(orange path in the picture). The problem I'm facing is when I want to ...
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What's a simple way to test a connection timeout?

I've recently increased the timeouts on all our LBs so they're consistant and I want to test that the new timeout has actually applied. Is there a simple powershell snippet or web tool which will ...
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How to close podman exposed port on public interface

I have running AdGuardHome instance on podman with WebUI port -p 8053:80. # podman port -a 1aeb8e800717 53/tcp -> 0.0.0.0:53 1aeb8e800717 853/tcp -> 0.0.0.0:853 1aeb8e800717 5443/tcp -&...
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QEMU hostfwd not working with multiple netdevs

With the following command I am able to ssh into the virtual machine on localhost:10022. /usr/bin/qemu-system-riscv64 \ -M virt -accel tcg -m 8192 -smp 8 \ -nographic \ -bios ...
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Debian server network connection keeps dropping

Background I'm working on an internal server running Debian Uname - r output : Linux osteocalcine 5.10.0-13-amd64 #1 SMP Debian 5.10.106-1 (2022-03-17) x86_64 GNU/Linux This server (which is planned ...
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  • 111
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Load-balancing per network port?

Theoretically there are: client LB SERVER A SERVER B Question: Is there a load-balancer solution (either by software or payed in the cloud) that can redirect the "clients" to "SERVER ...
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Why linux-mint host is unable to ping a alpine vm?

I an alpine vm running inside virtualbox I have set up 2 network interfaces: eth0: a nat interface eth1: a host only one Guest network config (alpine VM) The /etc/network/interfaces have: auto lo ...
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403 Forbidden on initial load after installing NextCloudPi

I am making this post mostly for awareness in case anyone else is having a similar issue. Story I am running nextcloudpi (nextcloudpi.ownyourbits.com) on a Raspberry Pi 4 8GB using the Debian Buster ...
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-1 votes
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How can I identify any computers by their hostname through my Cisco ASA5506 Firewall?

I have set up my Cisco ASA 5506 with a very simple configuration (port 1/1 as wan and port 1/2 as lan) with a simple DHCP server dynamically assigning the ip of the only lan port (so it will always be ...
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Why can't i acces remote Windows Server through MacBookPro?

I'm trying to access a client MacBookPro to Remote Server using Remote Desktop Application "RD Client" I connected a VPN to that server. BUT But in the application when I fill the remote ...
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1 answer
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Simple reverse proxy with nginx and docker gives 404

I have a very simple setup. Three containers in docker that I want to communicate between, nothing else. Attacker (kali with nginx), reverse-proxy (alpine with nginx), and victim (alpine). I'd like to,...
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How to limit UDP port range with K8s + Calico + Wireguard

We have several Kubernetes clusters at Hetzner using Calico (vxlan) with security enabled (Wireguard tunnels). The recent Hetzner outages knocked everything offline: Due to always different ...
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How to access hosts local network from a docker container?

I have two machines running in one local physical network in the office. One of them is exposed to world as a http web server (nginx on docker), the other one is not exposed to the world, it exposes a ...
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Route between two interfaces

i have two interfaces l2tp1(L2TP) and vti64 (vpn ipsec). L2TP client can not see vti64 (vpn ipsec) network. How to make route between two interfaces ?
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In AWS how can I route outbound EC2 traffic through different Internet Gateways depending on the payload?

I have a weird scenario where I need to route certain outbound traffic from an app hosted on EC2 through different regional IP addresses. Long story short we have 2 clients with APIs that our app ...
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Does Network Card slow down when there are a lot requests

App1 makes 100k+ requests/minute. App2 on same PC/different CPU core, occasionally doing some requests. The bandwidth is 10Gb/s both NIC and network and is not a problem here. Would App2 experience a ...
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is there a way on Linux to set DNS servers using a cmd line?

I use a script that creates multiple network interfaces with IP adresses. An example of commands used by the script: ip addr flush eth0 ip addr flush eth1 ip addr add 192.168.1.10 dev eth0 route add ...
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Why might an end-user IP address be different when accessing different but co-hosted websites?

I am trying to understand the following observation. We have two domain names, domain1.example and domain2.example. At a DNS level, there's an A record to an anycast address. Both domains resolve to ...
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When PF firewal runs local network traffic is slowed

OS FreeBSD-13.0p3 We have a gateway router (G) with three physical Ethernet interfaces. One (W1) is the WAN gateway. The other two (L1,L2) are connected to the same wire. L1 belongs to the 192.168....
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-2 votes
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Windows 10 random time outs [migrated]

I recently started experiencing the issue that my internet just randomly "cuts out". At home I have a DSL Router and a Repeater, all from the same brand (Fritz!). The repeater is wirelessly ...
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TCP slow start and duplicate ack

In TCP slow start, what happens when 3 duplicate ack is received. I am aware of the recovery process in congestion avoidance, however I read a blog post that if 3 duplicate acks are received in slow ...
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-1 votes
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Why do traceroutes start with the same path? [migrated]

I'm curious as to why all traceroutes start with the same path. For example, if I want to do a traceroute from my current location to www.google.com and another one to www.bbc.co.uk, the first few ...
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Using container with openvpn client to route other lan client

I have been dealing with this hassle for almost two months. I will explain the situation. I work from home and to access most of my company services I have to use an openvpn client. The thing is that ...
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Temporarily disable Hyper-V networking components on host

I have a Windows 10 PC running Hyper-V. Everything works well. I've learned that when Hyper-V installs, it sort of "takes over" the networking in that PC. Everything starts going through the ...
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