Managing and using network connectivity on a unix system

learn more… | top users | synonyms (1)

0
votes
4answers
80 views

Setting up hostnames on local network [duplicate]

So, I'm setting up an experiment network for me and the other geeks at my school to use for website testing and server practice, and I'm the sys and net admin (but really it's just for playing Quake). ...
3
votes
2answers
56 views

Timeout with 'service network restart'

I have a script running on fedora 22 where I am restarting service network as part of a troubleshoot calling service network restart. I want to check if that command is taking too long to execute. If ...
2
votes
1answer
76 views

Network interface crashes after disconnecting eth wire or restarting service

At startup or reboot, network interface works fine. Host is reachable and also can communicate with other devices on the local net or internet. IP address is configured as static, and dns-nameservers ...
1
vote
0answers
93 views

How to do iptables nat loopback?

I have a linux server behind the ISP's cablemodem-router combo. With some hacking I was able to make the port forwarding work, and the DHCP exceptions in the udhcpd. But I wasn't able to do the NAT ...
1
vote
1answer
39 views

Is there a way to send packets through one ISP and receive answers through another one?

I just finished building my first load balancer that combines two different ISPs. This mechanism works just fine, but it's a little bit limited because a connection can't simply utilize both ISP at ...
1
vote
2answers
79 views

How to Do Split Tunnelling with Slave ppp0 VPN + 2nd VPN?

Network Finland(internet)-PC(Sweden)-Uni(Sweden). Uni IP is fixed. Finland(internet) is gained with 3g-4 connection. I need to use a VPN provider to change my country but the VPN provider gives ppp0, ...
0
votes
1answer
20 views

Where does a Centos7 VM get the IP address for the local host name from?

On my centos7 VM, hostname says bmargulies-centos7, domainname says (none), dig bmargulies-centos7 says what's below, and ping of that hostname hangs. Where does the IP address 92.242.140.21 come from?...
1
vote
0answers
34 views

AIX: network and route problem [closed]

I changed my router some days ago. ping, internet, and network are working on AIX, but SSH is terribly slow. For connecting to other hosts on the same network it takes... two minutes! This is my ...
1
vote
0answers
34 views

Networking failed to start on Alpine linux

I keep having an error when booting Alpine Linux Networking failed to start. I'm using a RPI3 which is connected by an ethernet cable to the box. Here's the /etc/network/interfaces : auto lo iface lo ...
1
vote
3answers
62 views

Check my DHCP lease?

Is there a way to show my current (client) DHCP lease? Or even better - retrieve all options/infos sent with DHCPACK?
0
votes
1answer
30 views

hostname -f .com.com

I modified my /etc/hostname file and /etc/hosts like that: hostname.com and 127.0.0.1 localhost.localdomain localhost ::1 localhost ip6-localhost ip6-loopback ff02::1 ...
1
vote
0answers
42 views

How to have systemd-resolved correctly come alive after hot plug?

Setup I am playing with a small embedded board running Debian Jessie. I am using as much systemd stuff as I can, including the networking stuff. I have added the file: /etc/systemd/network/eth0-dhcp....
0
votes
0answers
33 views

Make debian use dual network ports for a gaming server

I have a server that has 2 LAN ports (or internet ports or whatever you call them) and i was wondering if its possible to make Debian Linux to use both ports? I will need maybe a link or somthing. I ...
1
vote
1answer
74 views

WPA_CLI showing access point as connected when it shouldn't

I'm using linux kernel 3.3 and am trying to use the wpa_cli utility to monitor the status of my WiFi connection. I'm using an Edimax WiFi dongle to connect to a wireless access point. Normally I see ...
1
vote
2answers
43 views

How to execute a command when internet is back

Sometimes my wifi is connected to router but my router is not connected to internet. How can I execute a command when my internet is back (from command line)? I want to execute: mpg123 /home/user/...
-1
votes
1answer
22 views

can a service like isup.me be duplicated on the system for self? [closed]

The Internet or Web as I understand it runs on variety of servers. The browser is the client which gives a URI or URL which tries to go through varied ways to connect to the web-page and render the ...
0
votes
2answers
239 views

How to route 3 computers in a wireless ad-hoc network?

I have 3 computers: 192.168.2.1, 192.168.2.2, 192.168.2.4 connected into an wireless ad-hoc network. I want all the traffic from 192.168.2.1 to go through 192.168.2.2 when it talks to 192.168.2.3. ...
1
vote
1answer
69 views

What is the network connection speed between two containers communicating via a virtual bridge running on the same host?

Does a virtual bridge (added to /etc/network/interfaces) limit the transfer speed of data from the memory of one lxc/docker container to another? For example does the memory throughput drop to that ...
1
vote
1answer
15 views

linux - context-based access control

I would like to further restrict network traffic based on the source / destination application. To do that, I'm using network namespaces, but is there a better / simpler approach? My approach ...
0
votes
1answer
50 views

Set an IP in Centos for access in SSH when connected through WiFi

I recently installed CentOS 7 on Virtual Box with a minimal installation, and I have enabled the network interface in order to show my IP and access to it through SSH when connected by an Ethernet ...
0
votes
0answers
53 views

ubuntu 14.04 create route to multicast stream server and have access udp://239.255.0.169:5500

My server is ubuntu 14.04 server edition and I am trying to re stream existed multicast stream by my server : Multicast stream server is using udp://239.255.0.169:5500 destination ip. On my side I ...
1
vote
0answers
63 views

Persistent network namespace configuration

When creating a namespace with ip netns add <namespace> the namespace and it's related config is deleted on reboot along with created interfaces like veth pairs. What is the correct way to: ...
0
votes
0answers
71 views

Set up a preferred network interface on Debian/Raspbian

I have a Raspberry Pi that is connected by Ethernet to DSL (eth0) and I also have some 3G/4G dongles that I am testing for fallback, in case the RPi loses the wired connection. In other words, I would ...
1
vote
0answers
39 views

Beagle Bone Black not retaining static IP

I have a Beagle Bone Black to which I have assigned a static IP. My interfaces file is as follows. auto eth0 allow-hotplug eth0 iface eth0 inet static address 172.16.41.226 netmask 255.255.255.0 ...
0
votes
0answers
24 views

How can I set up my ethernet on a fresh install of Fedora Server 23?

I am using Fedora Server 23, and cannot get my ethernet connection to work. It works fine on Ubunutu, OS X, and Windows 7 on the same machine. [root@localhost etc]# ifconfig ens5: flags=4163<UP,...
0
votes
0answers
23 views

Cannot connect to WiFi network using /etc/network/interfaces

I'm trying to connect to a WEP WiFi network using only the /etc/network/interfaces file: auto lo iface lo inet loopback auto wlan0 iface wlan0 inet dhcp wireless-essid mySSID wireless-key ...
3
votes
2answers
126 views

Bind9 denied query

I created a bind9 based DNS server to work only in forwarding mode: This is my named.conf.options file: #acl goodclients { # localhost; # localnets; #}; options { directory "...
3
votes
2answers
96 views

How to detect / prevent systemd network startup failures

Using Centos 7 (most recent updates), on a remote firewall machine that is 200 miles away, I have occasional difficulty on reboot with the network stack not properly starting up. The box has 3 ...
5
votes
1answer
114 views

Simulate ethernet cable unplugged on a remote machine while staying connected

I am working from home on remote embedded Linux machine "X" via ssh. It has one physical network card. I need to simulate Ethernet cable unplugged condition on the same remote machine "X" , while ...
2
votes
1answer
75 views

Problem using GSM USB modems on HP Pavilion laptop

A week ago I migrated from an old PC running Ubuntu 11.04 to Laptop running Kubuntu 16.04. I am having problems using USB modems on the new setup. 1st modem is a ZTE. This modem intermitently loads. ...
1
vote
1answer
43 views

Searching for a solution to set up a reverse proxy for game servers

I run a game server on my dedicated box in country A, which runs Linux and communicates with its clients using UDP. The server has players from both inside and outside Country A. Players within ...
-1
votes
1answer
98 views

How does Google know that I've got an old version of Chromium? [closed]

I use the Chromium web browser, and when I visit google's home page (www.google.co.uk), I get the message "We've detected you're using an older version of Chrome. Update to stay secure". The message ...
0
votes
1answer
29 views

How can I boot ubuntu from external Hard disk drive which is connected to Raspberry Pi

I have Raspberry Pi 2 which runs on Raspbian OS and External HDD is connected and mounted to it. It is connected to local server. I have a laptop and I want to boot Ubuntu from External HDD which is ...
1
vote
0answers
53 views

Enabling brcmfmac driver for Wifi on a Macbook Pro

So I'm trying to install Void Linux on my Macbook Pro however it doesn't appear to come with the brcmfmac module. There are a bunch of .bin brcmfmac files in /usr/lib/firmware but nothing in /usr/lib/...
1
vote
1answer
32 views

How do I configure VirtualBox snapshots running server processes to restore correctly?

I'm running VirtualBox 5.0.20 on an OS X host. There's a variety of guest systems, including Ubuntu, CentOS, Windows and OS X. For each of these systems, I created a live snapshot (i.e. while the VM ...
2
votes
1answer
67 views

User mode linux eth0 connected to host tap ethernet device not coming up

I am trying to setup the network between UML instance running on ubuntu as host. UML--eth0-(192.168.0.254) ----------------tap0--(192.168.0.253)--VM But, I am not able to bring the eth0 device in ...
0
votes
2answers
60 views

How to determine what IP addresses are available in a hosts table?

I'm working on a script that will read from the /etc/hosts file and determine what IPs are available in the hosts file. The way the hosts file will look is as followed: 172.17.164.2 System1 172.17....
0
votes
1answer
38 views

High time until SSH asks for password

I've been noting recently that any host that I ssh to in LAN, waits like 5 seconds before asking for password. ping sometimes also waits, but less(like 2 seconds), but it shows it has resolved the ...
1
vote
1answer
52 views

TP-LINK TL-WN722N weird behavior

I tried using the TP-LINK TL-WN722N wifi adapter with my fresh Arch Linux installation, but it has a really weird behavior. In my house, I have 2 access point, from which one is easily accessible from ...
1
vote
1answer
179 views

Connecting to wifi network with captive portal login page using wpa_supplicant

I am currently trying to connect to a BTWi-fi / BT_Openzone unsecured network in my office using my pcengines apu1d4 running debian 8.4 with edimax ew-7811un wifi dongle. When conventionally ...
0
votes
0answers
42 views

Configure “Link-Local Only”

I have a workstation running Linux seus and I want to link it to a network storage NAS ( WD cloud ex2 ultra) via a link-local only using the ethernet port on the motherborad ( connect directly the ...
3
votes
1answer
47 views

Unable to access internet after making ip static in beaglebone black

I am newbie in Beaglebone black. I am trying to make my IP static in my Beaglebone black. For this I follow this tutorial. After making changes according to tutorial, my /etc/network/interfaces file ...
5
votes
4answers
274 views

Is there a way to find self's dynamic public ip address using cli in Debian? [duplicate]

The easiest/simplest understanding of the web is a. When you connect to your ISP, the ISP gives a dyanmic address (like a temporary telephone number) only for the duration of that connection, the ...
0
votes
1answer
58 views

How to host a website on kali linux virtualbox machine? [closed]

I have a puzzle, shown here: http://imgur.com/a/ijyPf. How do I host my website on a Kali Linux virtual machine? How do I access my website with my public IP? I just don't know where to start and ...
0
votes
1answer
34 views

How to determine if it is a fault of the Network Card?

Basically, I have a PC having problems. Let's call it POO. POO is a pc running Gentoo Linux, with KDE. It is quite freshly setup on an old hardware. So far I do not notice it has other problems, ...
2
votes
2answers
76 views

Combine Two SSH Commands

The first ssh command is done on my computer, I enter the key password, then put the second ssh command in while logged into the server. ssh -i cloudkey -L 6000:localhost:6001 admin@54.152.188.55 -p ...
0
votes
0answers
24 views

Wep authentification fails with netctl

When trying to connect to a network protected by wep on my laptop I get the following error: Wpa association / authentification failed for interface <interface> I have the latest version of ...
0
votes
1answer
38 views

SSH - How To Make Three Computer Tunnel?

ComputerA connects though putty to Server at port 77, and there is a reverse tunnel set up from the Server at port 6666 to ComputerA at port 22. ComputerA also has a ssh server set up with a user ...
2
votes
1answer
27 views

CentOS requires root pw for network pref changes

Why does CentOS require root privileges to configure the preference panels? It seems like sudoer access really should be sufficient for this. Is it possible to change this?
2
votes
2answers
71 views

Static IP configuration on openSUSE

Long-time Windows user here -- this is a beginners question, network-configuration (especially on Linux distributions) is not my area. I believe I've done my research, however. Although I might've got ...