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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Raspberry Pi won't bring up wlanX interface - multiple wireless interfaces

Let me jump straight in. I am using a raspberry pi 3 running latest version of raspbian (pixel) as a router/wifi hotspot I have 3 wireless interfaces: built in wifi interface (brcmfmac) TP-Link ...
CybeX's user avatar
  • 1,385
10 votes
3 answers
2k views

Attach to the same tmux session from different nodes of a cluster

I'm working on a computing cluster which has several hundreds of nodes. A load-balancing scheme picks an idle node to login to when ssh-ing into the cluster. As a result, it is very unlikely to re-...
elemakil's user avatar
  • 301
9 votes
0 answers
12k views

What IP/ports should be opened for Docker Hub?

Given our client's restrictions, we cannot have our VMs completely open to the internet. However, we sometimes need to pull Docker images from Docker Hub. We can white-list IP addresses and ranges, ...
Nico Villanueva's user avatar
9 votes
2 answers
4k views

Cannot make mobile broadband Vodafone USB connection Ubuntu 13.04

I have Ubuntu 13.04 and I bought yesterday a Vodafone USB stick for internet connection. I am located in Romania. This is what I've did: First Thing Network Connections, added connection. Selected ...
user1812076's user avatar
9 votes
1 answer
2k views

sshfs: cannot set file timestamp

Using sshfs with autofs on Ubuntu, I cannot set timestamps on remote files: $ touch /sshfs/server/some/file touch: setting times of `/sshfs/sshfs/server/some/file': Permission denied I do have write ...
mivk's user avatar
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8 votes
2 answers
6k views

Shared connection frequently closes when opening a new connection

I'm making heavy use of reusing a shared connection which I open to a remote box at the beginning of my workday. My .ssh/config looks somewhat like this: ControlMaster auto ControlPath ~/.ssh/...
elemakil's user avatar
  • 301
8 votes
1 answer
16k views

Enable SMB file sharing on OS X - "Incorrect Password"

I have a Mac running Snow Leopard connected to an Active Directory domain. I can share folders on the Mac and view files from Windows without problems. When I try to enable my Mac account for write ...
Tim Robinson's user avatar
8 votes
1 answer
36k views

Pass VirtualBox Guest connections through proxy

The computer is inside a company and only have internet access through proxy. I want the guest inside the VirtualBox to access the internet without changing anything in the guest. The host is Windows ...
Carlos Goncalves's user avatar
8 votes
1 answer
2k views

How to prefer ipv6 over ipv4 only for specific websites?

I only have ipv6 connectivity via a HE tunnel on my router, so normally I want to prefer ipv4 over ipv6. For some websites however, I would like to prefer ipv6. Right now I have just set ...
kria's user avatar
  • 81
8 votes
1 answer
723 views

Forcing *BSD to accept both IPv4 and IPv6 traffic on a single socket

I have tried a ton of stuff and keep coming up entirely empty handed. Allow me to frame the situation: I have a *BSD Jail setup in FreeNAS that runs a Plex Media Server (Plexpass). It has IPv6 ...
Nathanial Meek's user avatar
7 votes
0 answers
14k views

netplan configuration not active -- ubuntu 18.04

trying to set up a fixed IP address on one of two NIC. I try using netplan. Not working at all. Not an expert on this, I am out of my wits and ready to roll back to some other way (networkd). Maybe ...
onouv's user avatar
  • 171
7 votes
1 answer
6k views

ssh randomly can connect, and sometimes "kex_exchange_identification: Connection closed by remote host"

Connecting to my server has never been a problem. But now I've added a mesh router in bridge mode to my regular router, and when I try to ssh to my server, sometimes it works fine, and other times ...
David Ljung Madison Stellar's user avatar
7 votes
1 answer
1k views

Windows Explorer freezes for 30 seconds when I click on (or even mouse over) a disconnected network drive

I have a network drive mapped in My Computer and displayed on the task bar beside my other drives. Sometimes the server which hosts the network drive is physically powered off. When the server is ...
WackGet's user avatar
  • 771
7 votes
0 answers
2k views

Docker is creatting another default network route overriding default one and disabling internet connection

I'm using docker, and when I started some container it starts the docker network interface. With it the daemon set-up 2 new routes, including a new default route, overriding my old one. And, of course,...
oaugustopro's user avatar
7 votes
0 answers
7k views

What is IPv6 connection sharing and why do I want it?

I can't easily find any good information on what IPv6 connection sharing is, nor how it affects my local network topology. I can only find a bunch of information on how to enable it and how turning it ...
BrDaHa's user avatar
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7 votes
0 answers
3k views

Make Genymotion use a host VPN

I'm using Cisco's AnyConnect to connect to a VPN using my Windows 8.1 PC. When using the Genymotion emulator, I would like it to use the VPN too. However, although having Internet access from the ...
jmm's user avatar
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7 votes
0 answers
10k views

How can I create a user-specific HOSTS File?

I know that by editing my HOSTS file (C:\Windows\System32\drivers\etc\hosts), I can block any site, but I would like to take this a step further. Is it possible (in Windows XP or newer) to have ...
MD. Mohiuddin Ahmed's user avatar
6 votes
0 answers
879 views

How do these VPNs achieve per-app tunneling?

I want to redirect traffic to specific network interfaces by application on Windows. This is commonly known as "split-tunneling" and a lot of people often do this to selectively send traffic,...
aedcv's user avatar
  • 161
6 votes
0 answers
10k views

How to use Windows WSL to configure routing? Is this possible?

I noticed that IP forwarding appears to be enabled in WSL (Windows 10pro 1709), according to sysctl. I'm hoping I can use this to make a software router on WSL -- to play with Hyper-V VM traffic on ...
init_js's user avatar
  • 375
6 votes
2 answers
9k views

How to force a specific software to use proxy?

I want to use a Tor SOCKS proxy on some programs (e.g. Android Studio) but not all. I'm a Windows 10 user. How can I do that?
CatCoder's user avatar
  • 169
6 votes
0 answers
2k views

Configuring unbound to resolve resolve on mdns

I am trying to set up my own home DNS server, partly to allow computers without avahi/Bonjour to resolve .local addresses. (e. g. unrooted Androids) I am trying to use unbound for this. Since I know ...
dratini0's user avatar
6 votes
1 answer
9k views

Windows detecting mystery device

I have just installed Windows 8.1 and I have noticed a mystery device being detected under Networks. Here is a screenshot showing the device and its properties. It identifies itself as a Nexus 7 - a ...
Moo's user avatar
  • 61
6 votes
1 answer
3k views

How to setup OSX as a wifi router from the command line

I need to setup my mac as wifi-router. I want it to appear indistinguishable from a stand alone wifi-router. I don't want internet access. Things I've tried. Turning on Internet Sharing Doesn't ...
gman's user avatar
  • 5,243
6 votes
0 answers
12k views

Can't use local default gateway with Cisco Anyconnect VPN connection

I'm using Cisco Anyconnect as my VPN client on Windows 7. When I connect to VPN, all my traffic is routed through the remote gateway, but I'd like the traffic to route through the local gateway. I've ...
bfw's user avatar
  • 61
6 votes
0 answers
875 views

Forward IPsec tunnel from IPv4 endpoint to IPv6 endpoint

I have a new ISP and only have a Dual Stack - lite connection now. That means I can't access my router via IPv4 anymore, since the external IPv4 address is private. I have native IPv6 connectivity. ...
Jonathan's user avatar
  • 161
5 votes
2 answers
6k views

Trying to ssh into IPv6 address, getting "no route to host"

I have a home computer that uses Ubuntu 22.04, that I'd likely to remotely SSH into, from the internet. I'm trying to do this through its public IPv6 address. The address doesn't begin with fe80::, so ...
Train Heartnet's user avatar
5 votes
0 answers
4k views

ifconfig: ioctl (SIOCDIFADDR): Can't assign requested address

I have a Macbook Air (M1, 2020) with macOs Big Sur installed. I just wiped my device and reinstalled the OS. What I want to do, is change, remove or add interfaces, but I can't. Evertime I try to ...
bool's user avatar
  • 51
5 votes
0 answers
7k views

'IpICSHlpStopSharing' : '0x80070490' in event log

Suddenly I begin to see a lot of errors in my event log (Windows 10 Pro Build 19041): 'IpICSHlpStopSharing' : '0x80070490'. Source: Host-Network service. I am working with Hyper-V (and Docker) and ...
user1195994's user avatar
5 votes
1 answer
6k views

How do I get my modem's IP address when using Google Wifi?

Occasionally I need to connect my ISP's modem directly to initiate a restart. Normally when I connect to my modem directly, I can either connect to the modem using the vanity URL provided by the ISP, ...
Senseful's user avatar
  • 4,230
5 votes
2 answers
3k views

Win 10: Disable "Restoring Network Connections" popup when connection to network drives drop

Whenever I get disconnected from my network drives and I happen to have like 10 folders of the network drive folders opened, 10 of these pop-ups will show up and I cannot close any of the windows ...
Tony N.'s user avatar
  • 51
5 votes
1 answer
7k views

In split-tunneling, how do I configure OpenVPN so that it uses domain instead of IP based routing rules?

I live in a place where Google/Facebook/Twitter and a few other websites are not available from accessing. OpenVPN is a great tool to overcome this. Originally, I must have OpenVPN running all the ...
xczzhh's user avatar
  • 151
5 votes
1 answer
3k views

No DHCP Reply on bridge with QEMU and TAP interface

I have a host machine running a virtual machine with QEMU and i want the DHCP server on the host providing an IP address to it. I am using static ethernet addresses for the guests, so i start them up ...
user avatar
5 votes
0 answers
16k views

USB Wireless Adapter recognized by `lsusb` but not by `ifconfig` on Linux

I am experiencing some issues with an Wireless Adapter. Long story short: I have a USB Wireless Adapter: AWUS036ACH (chipset: RTL8812AU) drivers are up to date: (i.e., apt-get install realtek-...
Mihai's user avatar
  • 225
5 votes
0 answers
377 views

What does it mean open mode in Virt-Manager?

Virt-Manager offers a network "open mode". Could you tell me what does it mean? For example: I use Fedora 26 with virt-manager 1.4.2
sebelk's user avatar
  • 267
5 votes
0 answers
394 views

Windows 7 stops sending DNS packets at seemingly random times

Pinging an IP directly (and just about any other direct IP connection) seems to pass through. On the other hand, when pinging a domain, using chrome to enter a website or attempting to use nslookup ...
Bharel's user avatar
  • 151
5 votes
0 answers
3k views

How can I disable IPv6 DNS in Windows 10?

My proxy server (though ping for 300ms+) have IPv6 addresses. I usually use it. So disable whole IPv6 is not a solution. Auto detected IPv6 DNS annoys me for wrong/lacked/polluted records. Windows ...
wiki908's user avatar
  • 51
5 votes
1 answer
2k views

VNC from MacOS screen sharing to linux Ubuntu

I’m trying to screen share from a MacBook to a VM running Ubuntu on Parallels on a MacBook Pro on the same network. I can ssh to it fine, but using the same account and IP address in MacOS screen ...
Joe Smith's user avatar
5 votes
1 answer
2k views

Block Windows 10 P2P updates with a corporate firewall

I work for a small IT company that fix mostly Windows computers, and lately we have an huge issue with Windows 10 updates. When a new computer enters our network and starts downloading updates, it ...
JohnKiller's user avatar
5 votes
0 answers
127 views

Modified file not being read over network

I have a strange issue with file sharing in Windows Server 2012. We have an application that's run from a network share. There's also a Terminal Services server so remote users can run it. This ...
Andrew Thorpe's user avatar
5 votes
2 answers
935 views

how will DNS work under this circumstance (when no domain name specified)

Supposingly there is a host/server in the network with FQDN as "host1.example.com" Can i know what will happen when i on another workstation, do a "ping host1" assuming that host1 is not recorded ...
Noob's user avatar
  • 1,595
5 votes
0 answers
688 views

Diagnosing iSCSI bottleneck

I just got my hands on a few DL380 G5s, and I thought I would use them in my home lab to test out the creation of a Hyper-V cluster using an iSCSI storage setup. I have installed Server 2012 R2 on all ...
Eds's user avatar
  • 417
5 votes
1 answer
709 views

Hostname resolution with .local suffix

Previously, I was able to resolve the ip address of machines on my local network using just "hostname" (where "hostname" is the name of the machine). For some reason, it seems that I can no longer ...
clcain's user avatar
  • 123
5 votes
1 answer
3k views

How does Windows automatically name a network?

Under certain circumstances, Windows is able to automatically give a Network it is connected to a name instead of naming it generically Network 1, Network 2, etc.. For wireless connections it seems ...
Hurzelchen's user avatar
5 votes
0 answers
3k views

SSH reverse proxy

I am setting up a Gitlab server (https://about.gitlab.com/) inside a virtual machine using KVM on a Ubuntu 14.04 host. My university charges us for every external IP address, so I cannot use bridged ...
oceanhug's user avatar
  • 191
5 votes
0 answers
819 views

Pidgin auto-reconnect

Using Pidgin 2.10.6 (libpurple 2.10.6) 4cfe697ea3ae39a4fb3dad8e3ed1c70855901095 On Ubuntu 12.10 (yes I know this is out of support) From time to time Pidgin will disconnect from a network. This ...
M1ke's user avatar
  • 171
5 votes
1 answer
2k views

VPN DNS configuration bug in OS X

I am using TunnelBlick to connect to an VPN (OpenVPN) with OS X 10.9.2. I can authenticate and pass traffic but the DNS entries injected from the VPN do not work. Here is the output of scutil --dns (...
user310577's user avatar
5 votes
0 answers
9k views

DHCP option to control interface metric

For some reason Windows is using only one interface for local network broadcasting (the one with lowest metrics). When client connects to VPN network, i want it to make new network preferred for ...
Tomo's user avatar
  • 51
5 votes
1 answer
516 views

VirtualBox not allowing me to modify IPv4 Network Mask?

I use Oracle VM VirtualBox to run a web server on my machine. I had it set up and working perfectly for a while. For the past few months it's been prompting me to update, and I finally gave in and ran ...
froadie's user avatar
  • 161
5 votes
0 answers
33k views

An error occurred while Internet Connection Sharing was being enabled

I want to share my lan internet connection over my hosted network. But it's being failed due to An error occurred while Internet Connection Sharing was being enabled... I found this post but all the ...
Mehraban's user avatar
  • 225
5 votes
2 answers
3k views

Default gateway disappears from routing table

I use NetworkManager (Arch Linux) on my laptop in order to connect to wireless networks. I use the official GNOME GUI. Everything works fine, but after half an hour or so the network is still ...
darwish's user avatar
  • 331

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