Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [networking]

Managing and using network connectivity on a Ubuntu system

-1
votes
0answers
5 views

QCA9377 USB wireless recurrent problem

I'm running Ubuntu 18.04. I tried the accepted answer to this question, however my attempts to reproduce the results are unsuccessful. Repeated trips to the well to get newer versions of the software ...
1
vote
0answers
15 views

How to reconfigure wifi after mistake?

My wifi was suffering badly in the past week. Very slow speeds and lots of interruptions. I know found out that the problem was with the modem and not with Ubuntu. In the mean time I used this answer ...
0
votes
1answer
20 views

Sshing into a server

I have noticed that after upgrading my laptop (not sure if this is the reason) to 18.04 Ubuntu, I have not been able to ssh to an institute server although I'm able to on the same internet network ...
0
votes
0answers
10 views

Adding ip route deletes ip from network interface

I've got two computers connected to each other with a ethernet crossover cable. I then assign each computer for an IP address for the corresponding network interface with ip a add 192.168.100.1 dev ...
0
votes
1answer
18 views

iptables setup for routing

I want to setup my ubuntu computer to route packets. Therefore I've read several tutorials which always had many rules to add to iptables. I finally found out, that the only rule needed (given that ...
0
votes
0answers
15 views

Connect Ubuntu Server 16.04 to Windows 10 using Ethernet cable

EDIT: ipconfig on Windows: Ethernet adapter Ethernet: Connection-specific DNS Suffix . : Link-local IPv6 Address . . . . . : fe80::49d7:ec19:199f:b968%13 Autoconfiguration IPv4 Address. . ...
0
votes
0answers
9 views

No network connection after suspend\resume

My case - Ubuntu 18.10, 64 bit, Realtek r8169 ethernet adapter. I had no problem with it until i edited connection name in connection manager from netplan-enp3s0 to something more understandable. ...
0
votes
0answers
11 views

Samba configuration for LAMP server

I am new to ubuntu and samba in general, so please forgive my ignorance. I am trying to set up my server at home so that I can update the .html files on the server from my windows pc. Here is the ...
0
votes
0answers
21 views

DTLS handshake failed: Resource temporarily unavailable, try again

I use OpenVPN to connect to workplace's network. When I connect, the connection is good and then it suddenly drops with the following trace. With this the internet connection from my router also drops ...
0
votes
0answers
10 views

Socat executing commands with arguments

I have a socat running on my ubuntu and I need it to execute a bash script with the input from the tcp stream as arguments for the script. For example, if the client sends "-l -w" then the socat ...
0
votes
0answers
9 views

wired 802.1X connection: how to force NM to ask for username?

I've set up 802.1X on wired connection (ubuntu 18.04, NetworkManager, PEAP-MSCHAP) modifying it to ask for password every time. The problem is that it works well but filling username field is ...
1
vote
0answers
15 views

Tcpdump stop ungracefully

I am looking for a reliable solution to do package capture for test automation. Right now, tcpdump has been used with the following command. sudo tcpdump -i ens160 -w filename.pcap -G 60 -W 1 I ...
0
votes
0answers
9 views

How Can I Monitor My Wi-Fi Connection To A File?

I have noticed in the last month or so that my wi-fi is dropping quite frequently. I am not sure if it is an issue with my pc or whether it is the router or even the modem. Network card - Network ...
1
vote
1answer
20 views

Is it possible to rank wireless networks?

When using Ubuntu 16.04.5 LTS, is it possible to rank, in order of preference, which wireless network one's computer should connect to first, second, etc?
0
votes
0answers
16 views

Constant network timeouts since few weeks on fresh Ubuntu 18.04

Since few weeks I have constant network timeouts. Here are logs from NetworkManager: gru 12 11:37:24 r2d2l NetworkManager[975]: <info> [1544611044.3534] connectivity: (wlp3s0) timed out gru ...
0
votes
0answers
8 views

Ubuntu Print Server - Keep needing to disconnect/reconnect USB Printer

I am trying to use an old Advent 32bit netbook running Ubuntu 16.04 as a print server with a Brother LASER printer. The Windows 10 computer finds the printer using Bonjour, connects and installs ...
0
votes
0answers
14 views

prioritize udev-rules before the driver/kernel occupy the name of the network interfaces

I have an ubuntu server 14.04 virtual machine with 2 network interfaces eth0 - for web management, SSH eth1 - for incoming span network analysis I've configured the machine with udev rules (to ...
0
votes
1answer
26 views

iptables prevents me from connecting

I'm using Ubuntu 18.04 and my current iptables rules are from this question; iptables -L gives: Chain INPUT (policy DROP) target prot opt source destination ACCEPT all ...
0
votes
0answers
17 views

Ubuntu says I have connection but wont connect to internet

Okay I'm greatly frustrated with this situation as I can not connect to the internet and I cannot reinstall windows and this is the only computer I have right now. I have used Ubuntu for a few ...
0
votes
1answer
16 views

Client can't connect to a DNS server (NXDOMAIN)

I'm an IT student working in VirtualBox. I managed to set up a DNS server that seems to work: Server: 127.0.0.1 Address: 127.0.0.1#53 Name: srv-01.lab.loc Address: 192.168.1.1 Now I need to check ...
2
votes
1answer
58 views

How do I remove another computer which has remote access to my laptop?

I visited a friend recently and he uploaded Linux on my laptop. He uploaded many programs from his laptop unto mine using a terminal. To do this he had to add a very long code from his laptop onto my ...
0
votes
0answers
19 views

Ubuntu dont detect internet after upgrade

When i put ifconfig it only detect local loop (lo) this happened after upgrade ubuntu 12.04 to 14.04 in a old computer and i cant connect to internet. I have put the command sudo lshw -C network and ...
0
votes
0answers
14 views

nethogs shows 0 KB although I have traffic

I am running a network related program that performs TLS handshakes with many hosts. I ant to monitor the network traffic so I used nethogs. It shows 0 KB. NetHogs version 0.8.5-2 PID USER ...
0
votes
0answers
12 views

Is anyone tried ntp with restrict default nopeer command

NTP version installed: ntp-4.2.6p5-5 I'm trying to understand the usage of below ntp restrict command : ----> restrict default nopeer Below is the reference info shared in ntp documentation: http://...
1
vote
0answers
21 views

Ubuntu 18.04 slow wired connection speed

Have tried several fixes from the internet on this, no luck so far. Just installed 18.04 on an old laptop, dual boot with Win 10. I've played with Linux a bit before (on a Raspberry Pi) but am not ...
1
vote
0answers
23 views

I built a PC with a hard drive from an old system, and now my TP Link Archer T4U USB isn't working properly

I have tried every single thing to get it to work. Reinstalled Drivers Used both Ubuntu 18.04 LTS and 16.04 (I have both on the same drive) Tried using a completely different USB Stick But nothing ...
-1
votes
1answer
35 views

apt update Proxy Error

How to resolve Err:1 http://archive.ubuntu.com/ubuntu bionic InRelease 502 Proxy Error ( Forefront TMG denied the specified Uniform Resource Locator (URL). ) [IP: 10.10.8.118 8080] Err:2 http://...
1
vote
2answers
67 views

Firefox can access internet but terminal can't

I'm connected to university router, and I know they have many restrictions, but firefox is accessing the repo links without any issue, but the terminal can't. How can I make the terminal use the same ...
1
vote
1answer
39 views

Ubuntu DHCP server doesn't assign a fixed address

I am an IT student, and I'm working with Ubuntu on VirtualBox. One of my virtual machines has a DHCP server installed, and it's set to give a specific IP-address (192.168.1.55) to a host Uclient. ...
0
votes
0answers
16 views

How to share wireless internet with wired

I'm running Ubuntu server 18.10. I have a wireless connection I want to share with my wired connection. What I am trying to accomplish is sharing the internet with a mini router. I can do it ...
0
votes
1answer
23 views

Desktop computer with network card connect to internet [on hold]

Will Ubuntu connect a desktop computer with a network card to the Internet?
0
votes
0answers
10 views

Routing local LAN through ipsec to remote LAN

I have a local LAN network 192.168.1.0/24 and on the remote side a LAN network of 172.30.0.0/16, with OpenSWAN on both sides that can ping each other's LAN address, and the local gateway machine can ...
0
votes
0answers
14 views

network metric: change default for vpn and wifi

I'm trying to configure the metrics on my PCs but most of the questions/threads are about setting different metrics on NIC and I haven't found answers when this involve wifi and VPN. I use VPN only ...
0
votes
1answer
22 views

how to set up nat and host only to access server from other computer virtual box

i want to create my own server on virtual box. i already add NAT and HOST-ONLY in virtual box. and this is ip from virtual box host-only Adapter ipv4 address = 192.168.56.1 netmask = 255.255.255.0 ...
0
votes
1answer
25 views

What is “options iwlwifi 11n_disable=1” in WiFi setting?

One of the common solutions for improving WiFi signal is to use this command options iwlwifi 11n_disable=1 in /etc/modprobe.d/iwlwifi.conf And the number can be 0, 1, 2, 8. I was unable to find ...
0
votes
1answer
55 views

Ubuntu (alternate) server 18.04: no network interfaces

I installed Ubuntu 18.04 using the alternate server installer. During the installation no network interfaces were detected. I could not figure out how to setup networking (neither ethernet nor wifi). ...
0
votes
0answers
44 views

netplan + WiFi: link is not ready (18.04 Server)

I'm trying 18.04 Server with this fancy new netplan and can't get my WiFi to work. Doing it the old-fashioned way (e.g. configuring wpa_supplicant.service and using dhclient), everything is fine. But ...
0
votes
0answers
22 views

Samba Share - Path not found on Windows Client

I'm not entirely sure if this is a problem with my samba configuration or my windows machine: I just setup a samba share with following configuration: smbd.conf: [share] Comment = Raid0 array share ...
0
votes
0answers
21 views

map ubuntu shared folder in windows 7

I have a virtual machine running ubuntu and I am trying to host some files on ubuntu and map the drive in windows PC. Following the steps here, here and here, I am able to see (from windows) the "...
0
votes
0answers
9 views

Ubunti 18.04 - Mount NAS on Boot

I have a WDCloud( EX2 ) NAS for several years, which works fine with MAC os and Windows 7- via Wifi and LAN. Now- I have an i5 with 8GB, 1000MB LAN connected to network, installed with fresh copy of ...
0
votes
0answers
25 views

SFTP/FTPS speed throttling

Download speed from my dedicated server tops out at ~4.5 MB/s or ~9 MB/s after a routine sudo apt dist-upgrade a while ago. Before it used to be fine. I tried these combinations: Filezilla SFTP, ...
0
votes
0answers
18 views

Openstack on Xenial Networking

What would it mean when Openstack created VMs can ping other machines on the external network--both VMs and physical machines-- but NOT the physical router(default gateway)? Nor can the physical ...
2
votes
0answers
23 views

Internet through wifi just can access google site

I just have installed Ubuntu 18.04 and upgraded to Ubuntu 18.10. I install php, mysql, phpmyadmin and remove all these completely. After all, I get a problem where my wifi connection just can access ...
0
votes
0answers
23 views

Ethernet - Windows works, but not on Ubuntu 18.04

On my Ubuntu 18.04 laptop the ethernet doesn't work at my home network (also wifi, hotspot, and usb tethering also don't work). But my Windows laptop works at my home network. Also the Ethernet works ...
0
votes
0answers
32 views

Does Ubuntu now use bpfilter or netfilter?

I'm trying to put together a firewall/router using netinstall of Ubuntu 18.10 with bpfilter. I know it's packaged by default with kernel >=4.18 these days, but I'm a little confused about how to ...
2
votes
0answers
21 views

Enable WebRTC in Firefox for whitelisted sites only

I would like to have WebRTC generally blocked in my Firefox browser, except for a small set of websites which I trust and which need this functionality. I know one can disable WebRTC in Firefox by ...
0
votes
0answers
27 views

Correct way to apply WiFi mac address randomization

I wanted to randomize my mac address on every boot just like in Windows 10. During my quest for that I tried the following - According to this post, starting from NetworkManager 1.4.1+ we can do mac ...
1
vote
1answer
72 views

Ubuntu 18.04 WiFi Networks are not displaying even though there are 3 nearby

I recently installed Ubuntu 18.04 on my 2009 mac mini. I used a bootable flash drive and all is well. Initially, WiFi adapter where not found, but after going into the Software & Updates > ...
2
votes
1answer
59 views

ASUS PCE cant detect 5ghz network

I have a wifi card with support for 5Ghz. The card is the ASUS PCE AC56. I have installed the drivers for my WiFi card from the "Additions drivers" tab in "Software & Updates", using the "...
0
votes
0answers
29 views

Ubuntu 18.04 configure netplan with 2 network cards

I'm going to install ubuntu 18.04 on a small "server", not a real server, just a deliverer of multimedia files on demand, for a local network. I'm recollecting info because I still have not installed ...