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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23 views

Work file server to be accessed remotely

Due to the Covid-19 situation, I have to sort out a work-from-home solution for the staff at my small company. I have looked into how best to set this up, but I require the help of experts to give me ...
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31 views

Windows Firewall causing system instability, slow internet [closed]

I was trying to block a large amount of IPs based on geolocation. I had to interrupt the script that imports IP ranges from running, because it was taking well over an hour and was grinding my system ...
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77 views

Why are DHCP messages broadcast?

I am learning DHCP in my networking class and as a part of my research, I was watching the following video: https://www.youtube.com/watch?v=0UvLRVlPx6A So in the Wireshark capture in the above video ...
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12 views

Why two ISPs in same IX are not routed directly even though they are on same route server? [closed]

Let's assume ISP A and ISP B are both members of one IX (not to be confused with many) and they are advertising their IP prefixes on same route server of same IX, yet their traffic does not go locally ...
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36 views

Can't resolve hosts in browser. DNS seems good. Issue crosses browsers. Other PCs ok

I am wondering why I can't browse most websites. I can reach Google sites, Netflix, and Facebook, but nothing else. Everything works on other sites. This is true of Edge and Chrome including in ...
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2answers
41 views

SSH: Remote Host identification has changed

I have a machine running ubuntu and another one that is a mac. They are connected to the same router. In the past I could connect from my mac to the ubuntu one using ssh and the IP address and use of ...
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1answer
63 views

Why do most application protocols have two ports assigned?

So I am trying to learn about the application layer in the OSI model and when I go to the IANA website, I notice that most of the well known protocols have same port assigned for TCP and UDP. For ...
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2answers
1k views

Why does `curl <this machine's IP>` behave differently than `curl localhost`?

(Redirected from networkengineering.stackexchange) I have two Raspberry Pis on my network - let's call them Pi and Rho. I'm trying to set up port forwarding via ssh tunnel between them, such that an ...
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84 views

Linksys AP losing connection to Linksys main router

I have a WRT1900 in my basement as a main router, and I have a WRT1200 on the next floor as an AP. They are connected by Ethernet cable. My problem is when I am connected to WRT1200 AP seems like this ...
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99 views

Ubiquiti Policy based routing: route one IP only trough VPN

I would like to route only one client trough VPN (Wireguard) on an Ubiquiti Edgerouter. Edgerouter is in switch mode, eth0 = uplink (192.168.1.239), client = eth4 with manual IP address 192.168.1.188....
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12 views

configuring sslh to work with nginx on https port

I am new with sslh configuration, but I faced problem: I have fedora server with nginx-1.16.1 configured with: http (80) https (3000) On sslh i have this config: listen: ( { host: "0.0.0.0";...
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21 views

VirtualBox Guest OS network setup is blocking Host OS network access

I reinstalled a different version of VirtualBox on my Win10 Host system. The Guest CentOS system and the Host were both able to communicate seamlessly with the Internet before my upgrade. I had ...
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1answer
20 views

host mutliple servers on the same port?

Okay, I have two physical computers on my one network, they are both running CSGO servers. Let's call them Server A, and Server B. Server A and Server B are both set to bind to the same port. But, ...
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14 views

port forwarding solutions/alternatives over a router with CG-NAT

I have a Ubuntu desktop (19.04) , i want to use this as a server at home , and access it using ssh , what i have done up till now is that i have installed ssh on this system , i can access this from ...
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37 views

If I remote connect to someone else's computer with their knowledge via RDP, is it possible for them to steal my windows password?

The title says it all. If I connect to someone else's computer with their knowledge remotely via RDP, is it possible for them to steal my windows password? Both party using Windows 10. We are both in ...
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34 views

Why do I sometimes get a traceroute that makes four internal LAN hops before reaching the WAN?

Why am I getting both 10.x.x.x and 192.168.x.x internal IPs each time I tracert? I am using a Hitron CGNM modem/router combo provided from my ISP. If I run a tracert I get something like: 1 20 ...
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1answer
41 views

Ubuntu 18.04 Not entire RAM is used but 2/4GB of swap is used,

So I have been working hard to optimize my Ubuntu Server 18.04 runing LEMP with everything up-to-date, including latest kernel updates and I have noticed some small delays in SSH responsiveness. My ...
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3answers
1k views

Home Networking: How can I have ethernet in another part of the house?

I would like some help with home networking. I have a place with two rooms. In one of the rooms there is a router with wireless capabilities. I can connect a computer to it with ethernet cables or ...
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1answer
79 views

Access web server externally

I have a JBoss server running on my macbook. I can access it via: https://localhost:8443/appname/login.do I would like to access it via my external IP address: https://102.115.XXX.XXX:8443/appname/...
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1answer
59 views

dont share VPN with Mobile Hotspot windows 10

I enable Mobile Hotspot in Windows 10 and connect to my VPN-PPTP and share VPN with connection (Local Area Connection* 3) Mobile Hotspot. now I connecting with my Phone to my Mobile Hotspot(share by ...
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1answer
34 views

How is my computer able to resolve hostnames on my subnet not registered to DNS?

I just deployed Canonical Landscape on a virtual machine on my network. When i entered the IPv4 address of the virtual machine in my browser to get started, it redirected me to the hostname of the ...
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16 views

Not Seeing Google DNS traffic from iphone

I'm new to this stuff so I probably just don't understand something. I'm arpspoofing my iphone, it works and I see TCP traffic in wireshark that's supposed to go to my iphone. When I filter for DNS, ...
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25 views

Share large files through torrent - deluge

I am trying to share a large data file (~2.5 Gb) with a colleague using the bittorrent protocol. I am on Fedora 30 and I am using Deluge 1.3.15. To create the torrent file, I am following the steps ...
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1answer
29 views

Forward port on OpenVPN server to client without redirect-gateway

My Setup: On the client I have a webserver running on port 443. The client connects to a remote server via OpenVPN. The OpenVPN server forwards its port 443 to the client tun0 address (10.0.0.2). ...
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1answer
23 views

How can I keep my Wifi connection from shutting off when I connect radios with a NIC?

I work as a Motorola tech and have a laptop with Windows 10. When I hook up radios, most of the time, they have some networking component for IP Site Connect or what have you. Once my computer sees ...
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14 views

Low speed HOMEGROUP and Network connections

I have connected 2 Laptops via HOMEGROUP and Network connection, on connection properties it says 72 mb/s speed but while actual file sharing its only up to 2.5 mb/s . is there any options or tricks ...
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3answers
48 views

Ethernet cable security

If I connect a second computer to my router using an ethernet cable, how much traffic can that new computer potentially see? Currently I have two computers connected to my router via ethernet cables; ...
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1answer
15 views

SSH laggy in local network when ping not running

We have multiple Jetson TX2 Ubuntu machines on our local network, and they all share the same problem. On WIFI (on the local network) SSH is extremely laggy. Generally it will take 1-2 seconds for ...
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11 views

How to fix network for docker container inside lxd virtualization

Host machine is running LXD in which is installed docker. Guest machine (host of docker) has dedicated mac address and ip address so it is not using any NAT for accessing the Internet (but shared the ...
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1answer
28 views

Very slow DNS lookup regardless of DNS server I use

No duplication. I checked all other questions with similar title and none the answers works. Also it often is different issue. Issue: Whenever I'm making connection to website/server that I didn't ...
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1answer
41 views

Some doubts about Destination NAT

I am kind of a noob when it comes to computer networking. I have been studying NAT for a while, but I am having a hard time trying to figure out what exactly Destination NAT does in some circumstances....
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1answer
25 views

mDNS on a large domain

I'm working remotely on a corporate VPN and I can connect to our intranet webpage using the server IP address. I read it may be possible to instead resolve using http://servername.local/ourwebsite ...
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1answer
36 views

How to restore a functional bridged Internet connection on Windows 10 (Pro)

I've been (unsuccessfully, so far) trying to share the content of a (shared) folder on my Lenovo laptop (laptop A running Windows 10 Pro) to laptop B (a budget unit by Schneider, running Windows 10 ...
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28 views

How to connect router to ISP

I'm in Sydney, Australia, with TPG. Configuration Option PPPoE ADSL2+ Static IP TPG services: dns: 203.12.160.35 and 203.12.160.36 smtp: mail.tpg.com.au pop3: mail.tpg.com.au news: news.tpg.com.au ...
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9 views

Use systemctl / systemd to sniff network traffic for the logged in user

I have an agent running as a systemd service which a user installs. Is there a way for this systemd service to be notified of outgoing http traffic? Perhaps to certain domains? This is all with the ...
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1answer
37 views

Private and Public IPs are confusing

I discovered recently that there is two types of ip, i.e. the Public IP and the Private IP. I know that the Public IP is the one the external world can see and the Private IP is local to our network. ...
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1answer
26 views

How does a packet go from my computer to a server for example Google, in the first person perspective of the packet

So, take for example my home network. It consists of 4 computers connected to a switch, which is connected to a router, which is connected to a modem to ISP. Correct me if I'm wrong, packet A travels ...
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45 views

Why two device on the same router cannot communicate to each other

I am very new to networking and I don't know much about them so please make it simple for me. so right now I have two devices connected directly via Ethernet ( LAN 1 = Server and LAN 2 = PC ) to the ...
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30 views

No route to host

The host is reachable: $ tracepath -n 172.20.192.12 1?: [LOCALHOST] pmtu 1500 1: 172.16.91.1 21.104ms 1: 172.16.91.1 ...
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32 views

Remote Desktop Client connection - can connect via cellphone, cannot via landline + router ASUS + public, static IP

I want to connect from home to office Windows Server using the Remote Desktop Connection (Microsoft) client. The server's RDP port is non standard one - my admin claims that opening a standard port of ...
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12 views

How to setup VLAN from Mac OS Mojave using terminal

I need to create a VLAN in order to be able to ssh from my macbook to another computer(Comp1). My macbook is connected to this computer(Comp1) peer to peer using ethernet cable. If this computer(...
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27 views

Installing OpenSSH with PowerShell

How is ssh used? ********************** Windows PowerShell transcript start Start time: 20200325223558 Username: DESKTOP-9AKB65V\thufir RunAs User: DESKTOP-9AKB65V\thufir Configuration Name: Machine:...
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Telnet issues between docker networks

in a host machine (its LAN ip is 192.168.0.94), I have the following services 1) mysql , its docker-compose.yml is as below. It creates a bridge network called mysql_default,it is assigned a VIP 172....
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3answers
67 views

Getting 10 Mbps on a 100 Mbps Connection

I have two machines at home. One is getting a full 100 Mbps when next to my router according to Fast.com, however my gaming laptop, a Dell G5 5590, only gets 5-10 Mbps when sitting directly next to ...
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34 views

Why is scanning my network picking up the wrong Interface, mac, and ip address?

So I've just used an application to scan for pc's on my network as a shortcut for wake on lan. Two of the three pc's show up with spot on information in its entirety. The one illustrated in the ...
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15 views

trying to remotely connect a windows 10 pc to MacOS Server from home

My graphic design business is trying to remotely connect to our MacOS Server. The people using Macs at home have no problem connecting to the Mac Server as if they were in the same office network. But ...
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16 views

How to determine why I cant send a message via Distributed Tracking Coordinator?

I need some help getting messaging through Aquilatech Wake On LAN functioning. It requires Distributed Tracking Coordinator to be allowed through the windows firewall, which I have done. I have 3 pc'...
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2answers
30 views

How to identify bottlenecks in my home network

I have a fairly simple network setup, Netgear CM1200 cable modem in master bedroom Wired Ethernet throughout the house Netgear R6700v3 wifi router connected to wired wall Ethernet in second bedroom ...
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15 views

How to connect two computers across the web using VPN / LAN

I see this free LAN software offering P2P connectivity: https://www.freelan.org/configuration_examples.html it has this example: my question is - what defines "bob.someisp.com" and "alice....
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22 views

How to get help for the Posh-SSH cmdlet?

I ran Get-Help which asked whether I wanted to run Update-Help, which I did. How do I get help on using Posh-SSH from within the powershell CLI? PS C:\> PS C:\> Get-Command -Name *ssh* ...