A computer network allows sharing of resources and information among interconnected devices.

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Is there any convenient way to run remote program on local data?

I have two servers running Linux, namely A and B. There is a large amount of data on A, but I want to use the program x on B to process those data. It would be inefficient to transfer all data from A ...
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1answer
64 views

Dell D610 6.5 CentOS Installation - Undetected Network Adapters

I've spent the better part of the day attempting to install CentOS 6.5 on an older Dell D610 laptop, using everything from a Minimal Install to the Full DVD. After multiple attempts I was able to ...
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1answer
17 views

Beginner's question: Accessing network location on domain

I'm new to Linux so this might seem a little naive! So, my computer is connected to a university network, in the computer science department. This domain is called "cs". However, "cs" is a subdomain ...
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1answer
65 views

Configure guessnet to switch automatically between LAN and WLAN

I want to configure guessnet and wpa_supplicant such that if I plug in my LAN cable, it connect to the network via the cable and if I unplug it, it automatically switches to WLAN and vice versa. I ...
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33 views

CentOS 5.5 server dropping & blocking connection

I'm running a CentOS release 5.5 (Final) server running the LAMP stack amongst other things. When working on a web project with numerous active connections to the server box (Plesk over HTTP, SSH and ...
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17 views

curl unable to find cslistener

netstat shows some connection from my linux box to remote host on their cslistener port. But trying to access that port using curl is giving error : $ curl -v https://myapp.domain.com:cslistener * ...
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36 views

generate gateway automatic through resolvconf & can't change my gateway [closed]

my connection is cable ethernate , UEFI mother board i7 intel processor, direct connect no routter, aliance broad band my root process:- #ip link set eno1 up #ip addr add (IP)/(netmask) dev eno1 #ip ...
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1answer
36 views

What is the reconnection policy of “persist” switch on “pon” command from pptp-linux package?

I use to establish a connection to my VPN PPTP server by typing: pon MyVPN persist I wanna know the reconnection timing details, but I have not found documentation enough about it. Specifically: ...
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26 views

Connecting multiple USB RNDIS devices to PC in the same network

Running an Ubuntu 12.04.4 I have the following issue: I want to connect multiple USB RNDIS devices to one PC. Additionaly, every device should be in the same network. The problem is that only one ...
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692 views

Using a bridge, an LXC container can't ping router, but the host OS can

I've got a virtual machine running under virtualbox, and in that virtual machine I've got an LXC container I'm trying to bridge to virtualbox's NAT interface: ------------- ----------- ...
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1answer
44 views

Does the order of options in the /etc/network/interface option matter

I'm trying to determine if the order of the options matter I'm using a script (represents an external remote interface) that is updating the /etc/network/interfaces file. The script can set the IP ...
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1answer
46 views

High RX packet error count with modem - how to analyze?

I'm testing a CDMA modem on my Debian embedded Linux system. I'm doing some wgets of large files and am seeing the connection drop now and then. Looking at the ifconfig output for the PPP interface ...
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116 views

OpenSSH hangs after login without showing login prompt

I ran across an issue with ssh after fresh Ubuntu 13.10 installation on Lenovo T420. I tried git pull (which failed) and this led me to more general ssh failing. After spending some 2-3 hrs of ...
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2answers
1k views

I always need to ifdown/ifup wlan0 after reboot

I'm trying to create an ad-hoc wifi made of 5 computers (one windows pc and 4 raspberry pi loaded with a raspbian) the raspberry pi will talk through mqtt, but tha'ts not the point. The problem I have ...
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18 views

Configure Debian VPS network to work under an another Debian

I have a very big problem. Our VPS is under DDoS every day and now i bought a DDoS protected second vps temporary (until the main VPS get the DDoS protection). My question is how can i setup the ...
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1answer
24 views

OpenVPN static key ip meaning/order?

I'm following this tutorial. What do the IPs mean after the ifconfig here? dev tun0 ifconfig 10.9.8.1 10.9.8.2 secret /etc/openvpn/static.key Can I use external IPs (assuming I'm configuring this ...
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1answer
154 views

Packet loss with RX error packets

I am seeing packet loss from all my blade servers within the HP Blade C7000 enclosure. # ping 192.168.2.140 PING 192.168.2.140 (192.168.2.140) 56(84) bytes of data. 64 bytes from 192.168.2.140: ...
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1answer
63 views

How do I accept all Networks with the same ssid with wicd?

We have a Mesh network here in my town, where every node creates the same client wlan with the SSID "kiel.freifunk.net". In wicd I can connect to those networks, but I have to choose which of them. ...
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1answer
430 views

CentOS bridge not passing traffic to eth1?

I'm setting up a network bridge on CentOS 6.4 and I'm not able to pass icmp or tcp traffic via eth1. UDP traffic looks fine. I'm sure that my test host is cabled to eth1 correctly. My config files ...
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2answers
1k views

Bridge not working

We want to create bridge (mybridge) on our board over eth0 and eth1 interface. The board runs Linux 2.6.34.9. Following are the commands: brctl addbr mybridge ifconfig eth1 0.0.0.0 ifconfig eth0 ...
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1answer
21 views

Access USB device of another machine as if it was locally plugged?

I would like to use, on server A, an USB webcam that is physically plugged on server B. Is there a way to mount the /dev/video0 of server B on server A (as /dev/video0, or /dev/video1, etc.). Both ...
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84 views

What exactly is happening when I run `netctl-auto enable-all`?

My wifi connection has been dying very regularly. I notice when I run netctl-auto enable-all I reconnect within 5 seconds every time. (My connection has dropped twice while posting this.) Why does ...
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1answer
20k views

FreeBSD: How to fix “ping: sendto: No buffer space available”?

I'm trying to ping a remote host, but I get an error. # ping 192.168.80.1 PING 192.168.80.1 (192.168.80.1): 56 data bytes ping: sendto: No buffer space available ping: sendto: No buffer space ...
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1answer
59 views

Using shell script to select static IPv4 configuration according to router address

I have Linux Mint 15, I live in a university where the hostel and lab have separate static IP settings. Is there a way to set up the connection mechanism so that my laptop will automatically select ...
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1answer
78 views

Change the DNS server in etisalat USB modem

I need to use the open DNS : 208.67.222.222,208.67.220.220 in my network connection. I use etisalat 3.75 USB modem HUAWEI in my Ubuntu 12.04 PC. I had tried to add this DNS in : ...
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2answers
56 views

Why does kill not have a parameter for file and not for port number?

If I want to stop a program given its tcp port number or its file or named executable, can I run something like kill -tcpPortNumber $1 where the parameter $1 is a tcp port number or kill -filename $1 ...
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3answers
5k views

CentOS 6 - nameserver entry in resolve.conf resetting after restarting network services?

In /etc/resolv.conf, I've changed the nameserver line to a new IP address. After saving and exiting, I run service network restart. I then go open /etc/resolve.conf again and see that the IP address ...
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1answer
66 views

Some packets are flagged as INVALID by iptables

I configured a proxypass rule in order to redirect requests from the port 443 to a JBoss server running on port 8080. All works fine except some 503 errors in the Apache log, around 10 per day: In ...
2
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1answer
95 views

How to enable two network interfaces both for internet in ubuntu12.04

My physical server A has two interfaces: eth0 and eth1. I intend to enable the two network interfaces both for internet in ubuntu12.04. I configure the /etc/network/interfaces as below: auto lo iface ...
2
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1answer
91 views

Share/Stream live video on LAN network - raspberry

As in the question, I need to share a video in lan by broadcasting. From server, I've tried with: avconv -i video.mov -c:v libx264 -f mpegts udp://[destinationIP]:1234 From client I can play ...
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Why are user account on remote server called shell account

Why are user accounts on a remote server called shell account , remote account sounds like a more intuitive name what is the reason behind this very unintuitive name ???
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66 views

Command for finding open ports

On my linux servers I have this alias set: alias ns="sudo lsof -Pi|grep -v ESTABL|grep -v CLOSED|grep -v -e '->' | tr -s ' ' '\t' | awk '{print $3 "\t" $8 "\t" $5 "\t" $9 "\t" $1}'| column ...
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0answers
39 views

Find hostapd's access point SSID

I have a Linux machine operating as an access point using hostapd and dnsmasq. The AP is working fine (the device is wlan0), but I am having difficulty finding the SSID of the AP for monitoring ...
0
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1answer
29 views

How to route “single ip” to different interfaces [duplicate]

i have a dd-wrt router (ip 192.168.1.1) with the following network interfaces: eth0 ath0 ppp0 (a pptp vpn client) i would like to route all traffic from ip 192.168.1.10 to 192.168.1.20 through ...
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0answers
32 views

RNDIS Server to make a computer as a peripheral

First of all my goal is this, have a computer as a peripheral device to connect it to anyone's computer with ssh protocol or web. The idea is doing this by using a plug and play USB cable . Facts ...
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3answers
3k views

Make some virtual MAC address

I want to make some virtual MAC addresses for my network adapter or wireless adapter, so I can connect to network with more than one IP address from one computer or laptop. How can I do it? (I know ...
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1answer
833 views

How to properly set up 2 network interfaces in CentOS (running in VirtualBox)?

I have a VirtualBox machine running CentOS 6.5. I've created 2 network adapters for it in VirtualBox's networking settings for the machine. The first is NAT which I want the guest to use to connect to ...
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2answers
48 views

Is it possible to “partially” connect to a VPN

My university offers a remote access VPN to access paywalled journals, which I often want to use. However they require using the Cisco AnyConnect protocol. This is a bit annoying because it ...
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2answers
1k views

How to open a port early in boot process to unlock LUKS via SSH

I have a fully encrypted server running Debian 7 and have set up dropbear and busybox to unlock the LUKS container via SSH (as described in this tutorial and in this U&L answer). Unfortunately, ...
3
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1answer
239 views

Bind9 — How to find which programs are making which dns lookups?

Using bind9 on a laptop shows lots of nonsense domains when network connectivity is down: Oct 18 19:56:18 lap3 named[1536]: error (network unreachable) resolving './NS/IN': 128.63.2.53#53 Oct 18 ...
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10answers
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Streaming to an Apple TV (3) from Linux

Alright, here is the setup: One apple tv 3 in the living room, connected to the network (wired). One pc running Linux (Arch Linux x64, AMD), containing all music, movies and series (wired). Now I ...
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6answers
14k views

Linux: allowing an user to listen to a port below 1024

I need to allow an user (different from root) to run a server listening on port 80. Is there any way to do this?
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2answers
36 views

Is it possible for a OpenVZ container to interact with a MySQL database on the host?

Say every container and the host itself has its own dedicated, external IP. Is it possible to do this without any problems? And is this really a good plan? Instead of hosting a database per ...
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1answer
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Giving OVZ containers their own IP

Is it possible to give an OVZ container its own external IPv4 address? Say I hire a dedicated server and purchase extra IP addresses. Can I assign those extra IPs to the containers? If so how would ...
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2answers
56 views

Detect open sockets manually (not using nc or similar)?

I'm trying to debug a network problem on a embedded system which has a very limited set of userspace applications. Meaning I can't use any of the following sudo lsof -i sudo netstat -lptu sudo ...
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90 views

On ssh connection the auth.log shows as source IP the external IP of the server instead of the IP of the client

I have a very odd situation with my ssh connection. Every time I connect to my server, whatever is my external ip, the connection have as source the server's external ip. Example Server S.O.: ...
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3answers
3k views

How to connect to internet using `nmcli`?

According to this link nmcli dev wifi con a52c60f5-c1af-4d39-8dc8-728bd770bffc password 12345678 name dlink_home should establish the connection, but it outputs the following error when I try to ...
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2answers
2k views

Can't get Intel I210 ethernet working on Debian wheezy

I have a server with an Asus P9D-I mainboard. It has two onboard Intel NICs: # lspci -nn | grep Eth 01:00.0 Ethernet controller [0200]: Intel Corporation I210 Gigabit Network Connection [8086:1533] ...
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2answers
129 views

Prevent Zypper trying to use IPv6

I'm setting up a box with OpenSUSE 13.1. For reasons beyond my comprehension, Zypper utterly insists on using IPv6 addresses and refuses to use IPv4. Which is a problem, since IPv6 doesn't work on our ...
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What priorities can be used in cgroups net_prio module?

Cgroups has a module called net_prio, and by using this module I can set the priority of network traffic generated by various applications. As you can read here, this can be achieved by setting ...