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Questions tagged [networking]

For questions on connecting devices together so that they can communicate with each other, as well as questions on networking equipment such as routers and switches.

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How can I set up multiple networks inside an Asus AIMesh network?

I'm new to subnetting/VLANs and am looking to set up a second network inside my existing wifi mesh to isolate lees-then-secure devices like cheap Chinese IP cameras and a WiFi Instant Pot from my ...
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1answer
11 views

How can I make port rerouting work locally?

Behold this command: iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080 I use that to reroute any incoming traffic from 80 to 8080, because the Apache 2 server on that ...
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1answer
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Windows: Limiting internet connection to one application

Recently, while gaming, I've discovered by accident that I get a much better ping over a mobile 4G connection. While using a wired connection my ping is around 40-70 ms, wireless 60-100 ms and over 4G ...
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Share Host Internet behind Proxy with Authentication with Virtual Machine

I have trouble to let VirtualMachine use Host's Internet. On Host, when I want to surf the internet, I have to login with my credentials. Proxy is Host machine is configured via Automatic Proxy ...
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16 views

Packet flow between Client - Load balancer - Server

I am building my own load balancer in C++. But I lack some fundamental knowledge of how requests/responses flow in such routing configuration. Suppose I have application at www.application.com and ...
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cannot get reponse from docker viz with a public ip

I have 2 EC2 instances in VPC, one of them in public subnet and 2 others in private subnet. I am during docker swarm on my machines in private subnet. I am running docker viz in my manager node. ...
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25 views

Odd outgoing smtp issue during certain times of day

Ok, so this has me stumped. I have also spoken with our ISP (comcast) and mail provider (GoDaddy), both are not only no help, but also stumped. Problem is only with outgoing email, incoming continues ...
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2answers
32 views

Ethernet frames larger than 64k

I have a several PCs in Gigabit Ethernet LAN, all are interconnected with single simple unmanaged L2 switch. No internet access. I want to build some realtime system, in which some PC should send a ~...
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20 views

Easy-PHP's apache stops listening on IP after network reset

I have Easy-PHP running on a Windows PC connected to two local networks on ranges 192.168.10.xxx and 192.168.20.xxx by cable: Listen 192.168.10.57 Listen 192.168.20.70 At around the same time every ...
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27 views

Docker: Connection PHP/Apache --> MySQL slow

I would like to ask for help on my Docker installation, because I can't fix it. I have read a lot about slow Docker containers but all things I tried don't help. When I browser the phpmyadmin UI it ...
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21 views

DD-WRT IPSEC VPN Downstream of Router

I need to create a site-to-site IPSEC VPN between two sites, my main limitation is the routers in play as they are very limited in functionality but I can at least put a single device on the DMZ. ...
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UEFI HTTP Network Boot

What is the correct syntax or structure when having to manually create an UEFI HTTP Boot entry ? i.e. bcfg boot add 5 PciRoot(0x0)/Pci(0x13,0x2)/Pci(0x0,0x0)/MAC(123456789AB,0x0)/IPv6(::/128,0,...
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1answer
26 views

Firewall rules not working for access point

I have created a wireless access point (NAT) using a laptop with Ubuntu Server (18.04). I used dnsmasq (for dhcp and dns) and hostapd (to create the AP itself). Everything is working OK, but I am not ...
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36 views

Connecting to a service on a host behind NAT from another host behind NAT over the Internet

Assume you have a host (hosta) that is running a TCP service (e.g. a VNC server on port 5901). You want to access to this service from another host (hostb) running a VNC client. Both hosts are ...
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27 views

Strange Wi-Fi “stuttering” (bandwidth drop)

I have been having Wi-Fi "stuttering" on my PC for months: the bandwidth drops every few seconds from 144Mbps to 48Mpbs, and the download speed to zero. Downloads are not interrupted and there are lag ...
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How to setup Ruby on Rails static web pages behind Nginx reverse proxy

Summary of question is what is the method to setup Nginx to serve static pages for site, and how and where is this Nginx server installed (is it supposed to be on same server where Ruby on Rails ...
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34 views

Open TCP Port, Service Listening, Yet Connection Refused

I'm trying to port forward so I can host servers for my friends. I'm using a Minecraft server as it's simple to setup and run. My PC is at 192.168.1.104 and the server is set on the port 25565 at 0.0....
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30 views

Ubuntu not getting ipv6 address automatically

I'm running Ubuntu Server 18.04 and for some reason it's not getting a global IPv6 address on startup. It has a link-local (fe80) address on ens18 (ethernet interface), but not a global one. To get ...
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53 views

Assigning IP to web server openVPN

I am new to openVPN, I have installed openVPN on Ubuntu vps and routed all traffic through it. Client is windows server 2016 and web server installed(ip:xxx.xxx.xxx). After connecting openVPN, I can ...
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1answer
238 views

run specific IP addresses or host names through OpenVPN connection

I have a PC connected to my OpenVPN server, while I'm streaming video games, the stream is interrupted, like its disconnect and reconnect again within no specific time range, sometimes it lasts for 10 ...
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14 views

Routing wifi from laptop to pc via ethernet issues

So I was routing my internet from laptop to pc via ethernet due to issues with my network card and I mistakenly changed the ip settings on the adaptors on both devices and now I can't get the bridged ...
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Why Fedora Workstation 29 send out automatic DNS requests to fedoraproject.org every 3 minutes?

I installed PiHole on my Raspberry Pi and set it as DNS server for my Fedora Workstation. Now I notice that my Fedora Workstation 29 setup requests fedoraproject.org about every 3 minutes. I find ...
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1answer
31 views

How do I isolate WiFi on second router from LAN on first router while providing internet through first router?

resources: Buffalo router with DD-WRT, new Comcast Xfi Gateway connections: Alexa devices, Chinese big screen TVs, android TV PCs, laptops, tablets, cell phones, PCs objective: untrusted devices use ...
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14 views

How to setup admin group

I have this school project where I automated some file transfers on a closed network with PsExec, however every time I have to put in credentials of the remote user to do it. I've seen people talk ...
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WiFi Direct on Raspberry - connect with constant pin (not generated randomly) [closed]

I'm trying to connect 2 RPi-PI-3 over WiFi Direct, but without pin authorization. I would like to connect them automaticly after system is booted. Is there any method to bind pin auth or other method ...
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29 views

tcpdump on openwrt does not output anything

I installed openwrt on my router and I'm looking for a way to use tcpdump properly. My internal IP address is 192.168.1.10. Running tcpdump -i any -l -vvv src 192.168.1.10 and dst not 192.168.1.1 ...
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1answer
56 views

How do I make only *some* network folder sharing require a password?

I should know how to do this, being a techie, and I have tried a few things already, but they aren't working. What I am trying to do is have two folders, one is shared with everyone on the network, ...
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7 views

Firewall exceptions worked once, but not subsequently

Been trying for a few weeks to get this issue resolved: Docker "waiting for an IP" when starting or creating new machine Basically, docker-machine times out waiting for an IP. I got it ...
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3answers
36 views

What does DNS-servers map, besides the IP-address?

As I understand it, a DNS server 'simply' looks up in some sort of table and find the IP-address associated with the domain you are trying to access. Then the IP-address is returned to you browser and ...
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1answer
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tcpdump: (all BPF devices are busy) - How to solve this

I was running tcpdump and then after some time I got this error: tcpdump: (all BPF devices are busy) I am not sure why? I killed all tcpdump processes, in case that this had something to do with it, ...
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1answer
30 views

Isolate LAN segment from the rest of the network

Let's say I have 3 switches as seen in the image attached and each one is a different department such as sales, human resources and IT department with a different network segment such as 192.168.1.0 ; ...
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Transfering config from AnonyTun to HTTP Injector

On my android phone I use anonytun and the configuration looks like this And I want to use the same config in an other app called http injector which does the same thing but I can not find where to ...
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2answers
43 views

Network Load On VPN

I have four locations that are very rural and have limited network reliability and speed. Our Main Office has our server, people and several other devices on a LAN. Each remote site has a couple ...
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0answers
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Setting up WebLogic for an IntelliJ Java Web Application Project

I'm getting the error Application Server was not connected before run configuration stop, reason: Unable to ping server at localhost:7001 when I try to configure WebLogic for my Java web app in ...
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Separate same network range in VM/XenServer environment

I like to separate same network ip range, and use that 'separated' for testing. I like to achieve something like: 192.168.0.X (DHCP) [some separation] 192.168.0.Y Both can be done using VLAN's - ...
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Can't access internet after installing NordVPN

As soon as I install the NordVPN app from the app Store on MacOS Mojave, the internet connection dies. I can't use my browser, or any internet connected apps. Deleting the app and then restarting ...
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1answer
16 views

Virtualbox gateway connection

Is it possible to make a "gateway" computer, which will be connected to Internet and other three guests machines, which would be able to reach web through first PC? I don't want these machines to be ...
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24 views

marionnet: tc command and RTNETLINK answers: Operation not supported

using marionnet to practice networking I'm having problem using the command tc:traffic control. I get the RTNETLINK answers: Operation not supported. Anyway I can jump over this hurdle?
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1answer
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is it a routing loop? nodes cannot communicate

in picture case 1, all the network nodes are able to ping each other, adding another node as in picture case 2, I start having a problem case 1: case 2: machine h1 is acting as a router with two ...
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27 views

Can't connect from Windows 10 to Mac Mini using SMB

I have a Mac Mini running OS X 10.11 where I set up SMB to share a set of files with my Windows machine (I have Windows as the client, connecting to the Mac). I used to use Windows 7 and everything ...
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1answer
346 views

Can network VLAN be identified by a string rather than a number?

Can VLAN be identified by a string rather than a number? My wifi router allows to configure VLAN that are named by string. I'm trying to connected it to my Ubiquiti EdgeRouter but can't get it to ...
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0answers
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Cannot access Windows Server over wifi

I have a server that I just set up running windows server 2016. My PC (windows 10) has network access via ethernet, it is able to see the server in the network section on my explorer. My computer and ...
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2answers
62 views

Trouble connecting to Ubuntu server using ssh

I been having trouble connecting to my Ubuntu 18.10 server using ssh. Whenever I try to connect with my college network this is the output ssh -vvv root@my.server OpenSSH_7.9p1, OpenSSL 1.1....
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0answers
28 views

nmcli: WIFI-HW vs WIFI, (and WWAN-HW vs WWAN)?

In nmcli radio status, given by: $ sudo nmcli radio all # Show status of all radio network interfaces WIFI-HW WIFI WWAN-HW WWAN enabled enabled enabled enabled Is -HW for ...
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1answer
37 views

Huawei HG8245H MAC Address Change (Clone)

My last router had an option to clone/change my router's MAC Address (did this in order to change my public IP Address for x,y,z reasons) On this specific router "Huawei HG8245H"(which is a 2in1 ...
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1answer
29 views

Port forwarding through multiple routers?

I want to use a Linksys wireless-g router as an extender/network switch. I've heard that if I leave the router in router mode and have it connected to the main router (my RT-AC86U router) it will act ...
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1answer
57 views

Why is eth0 responding to ip-address assigned to ethernet gadget usb0?

We configure networking on an embedded Linux system by setting one static IP-Address(169.254.0.1/16=LLA) on an Ethernet-Gadget/usb0 while using DHCP on Ethernet/eth0(192.168./16). To our surprise the ...
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1answer
36 views

Detecting local DNS server, under Linux

I want to disable my router's DNS service, and use my own dnsmasq server on local LAN as a DNS caching server, for all other machines, would it be possible? I.e., is there any mechanism for all other ...
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14 views

RRAS SSTP VPN only accepts connection after attempting a PPTP VPN connection

I have a DC running RRAS with 2 public IPs. IP 1: Forwards all 443 traffic to a web server on the domain. IP 2: Does not forward 443 traffic so the SSTP VPN can listen for incoming connection ...
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1answer
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Why is my Ruby or ADB network command very slow inside my docker container, but fine for the host?

Recently, two unrelated commands started behaving very poorly inside a Docker container with host-networking: Android adb took some 12 seconds to connect to another machine's adb server to use its ...