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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Can't connect to XAMPP using pfSense

good afternoon I have a webServer behind a pfSense and also a static IP address. My efforts are all for trying access my webserver using the static ip address (Access remotely) using a specific port. ...
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Is physical connection sufficient to register a MAC address to a switch?

I have a computer connected to an unlabeled RJ-45 port. Because it is not labeled, I do not know which switch port the computer is plugged into. My initial thought was that I could login to the ...
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Traffic not passing through the site-to-site VPN Sonicwall (VM on Azure) to Sonicwall on premises

I have created a VPN site-to-site with a Sonicwall NSv on Azure and a TZ400 on-premises. The VPN is ON but the traffic between the two sites does not go through. I am able to ping the X0 (LAN ...
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Docker container communicate via a specific port oustide of Docker

So i'm currently facing the problem, that I'm not able to talk to a specific port, which is outside of my docker setup. To be exact: As you can see in the docker-compose.yml down below, i'm running ...
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Ubuntu 20.04 forward traffic between two interfaces (wlan0 and eth0) using NetworkManager

Running Ubuntu 20.04 on a Pi with netplan disabled and using NetworkManager only. Have wlan0 running in AP mode and an ethernet cable connected to the Pi. I want connections made to the wifi AP on ...
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Why not use a large subnet to address IP exhaustion in AKS Azure CNI?

I'm reading several articles on planning IP addressing for AKS K8S cluster when using Azure CNI such as this one. They all describe the risk of IP exhaustion and recommend reducing maximum pods per ...
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Attempting to drop packets to simulate a network failure

I have a switch running Linux with multiple devices on it. I'm attempting to simulate a network outage on one of the devices. I've attempted to drop the packets with both netem and iptables using ...
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How to fix the below micro bursting

I'm currently in the process to use Traffic Shaping 'tc' to apply rule hoping to reduce the bursts. The application use UDP port 49155 (20ms audio packets to other devices) to send audio to other ...
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Internet conection through RDP

I am looking on possibility to have access to internet through RDP connection. I have VPN tunnel which allowing me to connect from my workstation (Lets name it Server-A) RDP to one Windows server (...
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Can I set the IP source address when replying to a packet? [closed]

I have two interfaces, eth0 and eth1. If I get a request via eth0, I would like to send the reply via eth1 using the source_ip=eth1-IP, is that possible to do in Linux? I know about the src field in ...
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Static Routing Server Rack

I am currently installing a server rack for a customer, and they've asked a qauestion. They want/need to optimise U space as to avoid paying overheads for U's that aren't needed. The question they've ...
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CentOS 7 Router/DHCP Server: Second NIC adapter plugged in but not sending internet through the cable

I have a CentOS 7 server configured as a router/dhcp server There is two NICs installed in it - The first one is receiveing the internet from outside, and its working as it should be. The second NIC ...
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Linux VM not accessible on local network

I have a Linux VM in Hyper-V that's only accessible from outside the local network. SSH and HTTP and what not works just fine when port forwarded, but on the local network, it rejects everything, ...
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Separate connections over 1 network cable

Consider the following network setup ┌───────────────┐ ┌────────────┐ │ │ ┌───────────────┐ │ │...
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MySQL server won't accept remote connections

I have a server (CentOS 7) running a fresh install of MySQL server (14.14 Distrib 5.6.51) with a dummy database, and I can't connect to it from a remote computer (both remote server and local computer ...
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Restricting OpenVPN connection to only one program

My Linux server works with YouTube videos a lot, downloading and collecting data about them with the help of youtube-dl. I want to route this program (youtube-dl) through an OpenVPN connection. Seems ...
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VLAN trunking on Juniper EX distribution / access switches

Let 3 switches : Faculty, Physics and Chemistry. Port 0 of Faculty connects to port 0 of Physics and port 1 of Faculty connects to port 0 of Chemistry. In this example, Faculty is the distribution ...
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How to setup a VLAN switch with Hyper-V virtual external switch?

I currently have Windows Server setup with one physical ethernet port (eth0) as an external VLAN trunk connected to a Hyper-V virtual external switch for VMs to share with the host. The host uses ...
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systemd raspbian wpa_supplicatant access point not working

Moving on from my prior question about identifying source of a wireless SSID, I am now ready to move on to the next challenge. Most of the documentation I found for wpa_supplicant and creation of a ...
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MT27710 (ConnectX-4 Lx) connection troubleshoot

Background: MB: Supermicro X10DRi SW: 2x Supermicro SSE-F3548R (MLAG - UP and running) Cables: 1x Mellanox MCP2M00-A003E30L and 1x FS S28-PC025 OS: Ubuntu 18.04 Problem: For my perspective ...
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OpenVPN/iptables: Routing of Multi-Client-Side local networks

We set up two open VPN instances on a cloud server: 6: tun0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 100 inet 10.230.0.1 peer 10....
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Route specific port traffic to specific IP address

I have a server (Server A) in internal network and I don't want to place it in DMZ zone. I have another one (Server B) in DMZ and they comm. each other. I won't bother you with their configs. I need a ...
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Hyper-V Create External Interface On WiFi Adapter - 2021

I am running a Windows 10 machine with a USB WiFi network adapter. I am trying to create a virtual switch, that is a external virtual switch based on the WiFi adapter so the VMs can get a IP address ...
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TC Filter - Port ranges u32

I have created the following tc filter: tc filter add dev tun0 parent 1:0 protocol ip u32 match ip sport 17056 0xffff flowid 1:2 however instead of just targeting port 17056 I want to target the ...
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Why Getting Speed With SNMP is not Stabil?

I am trying to get network usage percentage and I check the time and speed between of two octets(before and next). Generally the speed of network of one octet is 1GBit(1.0E9) but sometimes I see that ...
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OpenVPN Unable to change VPN Network Subnet

I have an OpenVPN server running that was installed using this script. The script generated the following file at /etc/openvpn/server.conf port 1194 proto udp dev tun user nobody group nogroup persist-...
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Why I am Getting Higher than %100 Network Usage From SNMP?

I am using SNMP in Ubuntu 20.04 to get the network usage info and I am using this formula to calculate the network usage: InOctets : The difference between two poll cycles of collecting the snmp which ...
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How to force `ip route get` to ignore a specific device?

How can I do ip route get, but force it to ignore a specific device? When I start my VPN, I run ip route get <vpn_server_ip> to determine what interface to use to connect to the VPN. Then I add ...
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Can I access an APFS drive plugged into a Pi over a network?

I have a SSD that's formatted for APFS Encrypted. I want to plug it into a Raspberry Pi and access it over a LAN from a Mac. However, as far as I know, there isn't a read / write driver for the Pi for ...
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3 router 2 networks want to see each other + share internet

I am trying to get my main network to see my homelab network (separate subnets) and both networks have access to the internet. I have tried several approaches and now have 4 routers in the ...
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I'd like to figure out how to setup rotating failover IPs, So when under attack it will use a different source address for web traffic

I'm simply wondering if it's possible to use multiple IPs for a piece of traffic of my choice. I want to have it setup to where it will use a different source address once the one it's currently using ...
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Proftpd :Multi configuration TLS /and unsecure

I want to have 2 configurations on 1 server: 1 connection FTP/TLS on a public address 1 connection unsecure on local network. It is working on TLS, and it is working on local network. But it does ...
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Reaching devices on Subnets

The following diagram will explain more easily my needs (rectangle are Routers ): I have a main router 192.168.0.1 which is handles 3 subnets and PCs. I need192.168.1.1 (about 30 IP's )and 192.168.3....
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What does `Accept-Encoding: gzip,deflate` mean?

Can someone explain what it means when I see Accept-Encoding: gzip,deflate when listening with ncat? Does it mean the body is compressed? And if so, how can I decompress it? $ nc -lnvp 4000 Ncat: ...
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I live in Australia, how is it that Stack Exchange is so fast without using any CDN?

I had a look at the Stack Exchange Servers: https://meta.stackexchange.com/questions/10369/which-tools-and-technologies-are-used-to-build-the-stack-exchange-network Seems they only have two data ...
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I have a situation with OSPF and EIGRP which requires a specific trace route. How can I get this to work? [closed]

Objective: Traffic should follow from R1->R3->R4->R6->R7->R8->R9->R10 In traceroute/extended ping : 178.41.41.13,) ( 178.41.41.34, 178.41.41.76, 178.41.41.137, 178.41.41.228, 178....
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Setting up Multiple WAN Static IP

We purchased a 5 Static IP Address package from Rogers and we need to use two IPs. The Rogers modem has 4 ports in the back of it so I plugged in two routers (one on each modem port). I then ...
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VPC serverless connector - Tag

The documentation explains that every connector has two network tags: vpc-connector and vpc-connector-"region"-"connector-name"" An egress firewall rule which filter the tag &...
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How to route between VPN endpoints dynamically

I have the following setup: OpenVPN endpoint 01 --| |-- Server 01 --> Internet OpenVPN endpoint 02 --| Clients can choose to log in via either OpenVPN endpoint 01 or ...
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Alarm monitoring receiver network lockups

Alarm monitoring receiver troubles I work for a MSP that has a home security/monitoring station as a client. For the past year I’ve been chasing a ghost of a problem that is driving me insane. TL:DR. ...
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Wireguard Unable to Complete Handshake on Android only 4G network

I have a Wireguard server on my home network which works fine on all my devices, including my phone when it's connected on Wi-Fi. The problem comes when I disconnect from the Wi-Fi and go on 4G, now ...
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mysql not answering haproxy calls

I have to build a fallback system, if the main mysql server fails. So, i wanted to do this with the haproxy, instead of implementing it into the software (because via proxy it should be much easier) ...
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40 views

CentOS7 Networking issue

I have a CentOS7 - running the latest CentOS7 software - server with two NICs, one of which is giving me grief. Initially it had only one active interface (p3p1 - fibre interface) and everything was ...
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Routing loop issue

We have a application having certain ip, let say myapplication.com The traceroute to the application give result something like below. The Ip and the time is just for illustration purpose. If you see ...
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slow sftp upload to cloud instance bcoz traffic is routed via China backbone network

jst wnted to ask abt a problem i hv with my cloud provider i.e. getting slow sftp upload. snt them the requested mtr output thn they explained it was due to some maintenance on a tier 1 isp service ...
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OpenVPN - Connect external users to VirtualBox Internal Network

Demo of connection I'm trying to set up a network where external users can use an ovpn file to connect to the "team1" internal network that I created in VirtualBox. The goal is to allow ...
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Fix VEthernet IP between restarts

I have some VM on Hyper-V in my development machine. Their net adapter is "Hyper-V Virtual Ethernet Adapter" and each VM has a fixed IP 192.168.2.x Every time I restart my laptop, I have to ...
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Routing different users to different interfaces with iptables

I have a linux laptop running that is running a VPN service through openvpn, and I would like for one user to use the VPN interface(tun0) and a different user to be able to use the default interface(...
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Soekris 6501 unit dead: searching for engineer manual or measuring voltages

Greetings electronics hackers ;) I am trying to fix an old Soekris Networks 6501 unit. When I'm powering it on, sometimes the Error led goed ON, sometimes it doesn't, but on the both console (outside) ...
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47 views

Accessing Docker API with Portainer

I'm in a situation where I'd like to access a docker installation on a different network with a local Portainer UI. I've looked at the documentation for exposing the docker API over TCP and how to ...

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