Managing and using network connectivity on a unix system

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3
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6answers
16k views

hostapd will not start via “service” — but will start directly

I am having trouble getting hostapd to start as a service. It fails when I try to start it: $ sudo service hostapd start [FAIL] Starting advanced IEEE 802.11 management: hostapd failed! From what ...
0
votes
0answers
32 views

Why do SSL negotiation fail on Linux? (Asus P5S-MX) (but worked on Windows7)

Can anyone tell give me hints to why the web requests fails in these wireshark/tcpdump traces ? (and perhabs hint to why a linux distro would start with SSLv3 as starting point) I a noob when it comes ...
-3
votes
0answers
8 views

Fast & Traceable copy of 2 TB data over Gigabit LAN from Ubuntu live mounted Volume to Synology NAS (Win SMB, NFS, Mac AFP)? How?

Fast & Traceable copy of 2 TB data over Gigabit LAN from Ubuntu live mounted Volume to Synology NAS (Win SMB, NFS, Mac AFP)? How? I am going a Data Recovery using a Unbunto Live CD (14.x LTE) ...
1
vote
1answer
11 views

Incorrect iperf configuration?

I have a laptop (with Ubuntu) and a router (with OpenWrt). When I check the version for both, the laptop says I have version 2.05 for multithreads and the router says I have 2.05 for pthreads. Both ...
1
vote
3answers
43 views

How to resolve hostnames with Raspbian 5/5/2015?

I'm relatively new to Linux and falling down the tree and hitting every branch on the way down (it seems). I'm trying to share an NTFS drive, or a directory on the drive, via samba, and I have found ...
0
votes
1answer
3k views

Linux Mint 17, Wifi Slow and Drops Connection, No Ethernet Connection

On a fresh install and updated Linux Mint 17 XFCE, the system cannot maintain an internet connection through wifi, and is unable to connect at all through ethernet. Wifi will work somewhat slowly for ...
0
votes
1answer
7 views

minidlna from one server not being spotted

I have minidlna set up on two servers on my subnet. One [serverA] is found by the other server [serverB] and the tv. The other [serverB] is not picked up by either other device. A quick check with ...
3
votes
1answer
2k views

Accounting for /proc/net/dev reported traffic

I noticed that according to /proc/net/dev I am constantly receiving around 6Kb/s on my wireless usb interface. But I can't account for anything even close to that with the individual connections that ...
0
votes
0answers
6 views

PPTP IPs different than LAN ips

in /etv/pptpd.config I have: localip 1.0.0.1 remoteip 10.0.0.100-200 my server real IP is 192.168.1.40 (my LAN is 192.168.1.0) is it OK to do it? how I can route it so the clients with ...
4
votes
1answer
2k views

Networking and Samba from a quest OS running on qemu

I'm trying to test some software on a big endian system to ensure compatibility. My plan is to use qemu on Ubuntu 12.04 to emulate a MIPS system. So far I've been able to create the quest system ...
0
votes
1answer
24 views

Suddenly all connections are rejected [on hold]

My system is Debian 8. Just now I was using ssh to connect to my laptop and programming. I swear i didn't even use sudo command, but all in a sudden, all connections are rejected. It seems that ...
1
vote
0answers
6 views

Default lxc networking suddenly stops to work

I've recently installed lxc on ubuntu 14.04. Networking used to work (lxcbr0 being a NAT interface, DHCP configured using dnsmasq) but after a container restart, the networking does not work any more. ...
2
votes
1answer
19 views

Disabling wlan0 adapter

Question: What is the terminal command behind right clicking on the wireless icon (Ubuntu 15.04) and then unchecking "Enable Wi-Fi" the box? Why am I asking it? macchanger just work for me when I ...
5
votes
1answer
3k views

Debian, two network cards - “no route to host” on eth1

I have added a secound nic in a debian box. That nic is ment for doing some test stuff, so those devices connected should just be able to access the debian box or be accessed from it. To set up the ...
1
vote
1answer
692 views

Is it possible to prevent eth0 network traffic from accessing eth1 network?

I am not really sure how this is possible but I have a linux(ubuntu 14.04) box with 2 interfaces. eth0 is connected to our lan 192.168.0.* and eth1 is connected to a dlink wifi router on network ...
0
votes
0answers
5 views

Iperf connection failed

I have an openwrt router connected to my ubuntu laptop with an ethernet cable. I installed iperf on both, and now I am trying to run commands (i.e. iperf -s), but I keep getting the following errors: ...
0
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0answers
6 views
1
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0answers
13 views

Can't access host-only network when on two interfaces

I'm trying to use a host-only connection with my VirtualBox VM. My VM is set up and can ping the host (192.168.56.1) on vboxnet0. If I disconnect the host from my local network (internet access) I ...
1
vote
1answer
53 views

What are possible reasons why iwconfig is not updating connection stats?

I use iwconfig to show me some information about my current internet connection like this $ iwconfig wlp2s0 IEEE 802.11abg ESSID:"eduroam" Mode:Managed Frequency:2.462 GHz Access ...
2
votes
1answer
31 views

what does none in “tun0@none” stand for?

In the output of ip a I just got the lines: 4: tun0@NONE: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 100 What does the NONE in there ...
0
votes
1answer
387 views

Frequent disconnections in OpenVPN

I'm suffering random disconnections with OpenVPN. I don't know much about the subject, maybe you can point me in the right direction? Here is the tail for /var/log/messages, it contains a <warn> ...
7
votes
3answers
3k views

How to know if a process is attached to a tap interface?

I sometimes come upon machine with tap interfaces (eg, when KVM is running). How can I know which process is attached to the TAP interface?
2
votes
1answer
69 views

Is it possible to echo characters directly to network?

Even when this is a network problem, I would say this is rather a Unix/Linux experienced users question. I am trying to manually send a network magic packet by using echo and redirectors (file ...
2
votes
2answers
201 views

reset Ethernet bonding without rebooting

I have the following Ethernet bonding configuration: old configuration: bond0 eth0 eth1 bond1 eth2 eth3 new configuration : bond0 eth0 eth2 bond1 eth1 eth3 I have made the ...
13
votes
2answers
7k views

Limit outgoing bandwidth on an specific interface

I would like to know the easiest way to limit outgoing bandwidth for an interface. I want to cap the outgoing port speed so that file transfers between my servers don't fail during busy hours. What's ...
0
votes
1answer
13 views

Install brctl for OpenWrt - which package?

I'm getting an error in OpenWRT Attitude Adjustment that says: -ash: brctl: not found when I run brctl addif br-lan mesh0 I tried: opkg update opkg install brctl But I got this error: ...
2
votes
1answer
742 views

redirect web server with no-ip and port forwarding in livebox

I want my Apache web server running on a Livebox (home router appliance running Linux) to be accessible from the Internet (WAN). I installed and configured the application noip2 on my Ubuntu PC. ...
1
vote
1answer
46 views

NetCat ignoring (not sending) network data to broadcast addresses

If I run these NetCat below commands (no error messages at all) during a WireShark capture running (capture filter= udp dst port 4000) : luis@Zarzamoro:~$ echo "Hello" | nc -w1 -4u 255.255.255.255 ...
3
votes
1answer
65 views

Bash: Permission denied when trying to echo data directly to Network

I am trying to send characters directly to the network stack as explained in this thread. Even when the process work OK under CygWin (Windows), the same lines do fail on Ubuntu v14.04: ...
0
votes
0answers
25 views

Realtek RTL8111 Network card not working on Ubuntu 14.04

I'm trying to install an Ethernet Card into my Ubuntu 14.04 desktop computer. Here is my lspci output (First one is my new ethernet card): 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. ...
2
votes
3answers
3k views

How to install Redhat using the iso image stored on Network

This is the case. I want to install the Redhat 5.6 on my system. But this time i dont want to use the actual DVD but this time i want to install it using the iso image stored on one of our server HDD. ...
0
votes
1answer
34 views

Set up interfaces file on Debian for Lan

A friend set up my Raspberry Pi so that it creates its own wireless network and I can connect to it through SSH over the air. The /etc/network/interfaces file looks like this: auto lo iface lo inet ...
0
votes
1answer
22 views

Loop commands to network daemon?

I'd like to feed a network daemon using a loop! To be more specific: There is a network daemon listening on localhost:portx. The daemon expects me to guess a PIN between 0000 - 9999. I want to use ...
4
votes
1answer
29 views

Turn off network on Raspbian

I'm trying to set up cron to turn off networking on my Raspberry Pi during the night (from 23:00 to 8:00). The problem is that none of this commands do the job: $ sudo service networking stop $ sudo ...
18
votes
4answers
58k views

Why the default eth0 interface is down by default on CentOS?

I am already a little bit familiar with Linux distros like Debian or Ubuntu (yeah, very similar) but I wanted to try Red Hat based - CentOS 6.2 . I have installed it on my Windows 7 host in virtualBox ...
0
votes
0answers
14 views

Connection issues serving as WiFi access point with no internet [migrated]

I'm not sure how to phrase the problem as a question so suggested edits are welcome. Setup: I have a raspberry pi running raspian with a wifi dongle. I've configured everything to run as a wifi ...
1
vote
3answers
66 views

Internet connectivity issues due to wrong MAC address (using Linux Mint 17.2)

I am new to Linux. Today, I installed Linux Mint (17.2) and tried to connect to the internet via a broadband connection. My Internet Service Provider (ISP) provided me with a fixed MAC address that ...
6
votes
1answer
973 views

What do I need to add a virtual IPsec adapter?

I'm trying to set up an IPsec connection manually from the console with iproute2. What I need is a virtual interface (at best, a virtual IP address could also be sufficient) that IPsec-transforms ...
0
votes
2answers
1k views

Need to add virtual interface in Suse Enterprise Server edition permanently

How can I add virtual interface in SUSE Linux Enterprise Server 11 permanently?
1
vote
1answer
20 views

How to get systemd-udevd to create a bridge device at start up?

I am running Ubuntu server 15.04 in a virtual machine. I am able to use the brctl program to create and manipulate networking bridges. I've decided to persist the setup (through reboots) by updating ...
0
votes
1answer
1k views

Mint 15 on Lenovo G700: wired internet not working (Atheros QCA8172)

Mint 15 doesn't see internet after installing it in dualboot with windows 8 (in Windows internet works well). My network card is Qualcomm Atheros QCA8172 Fast Ethernet (rev 10). What I did: Install ...
0
votes
2answers
790 views

Realtek drivers prevent detection of eth1 interface?

Here's the situation: I had a working network setup on my Debian box, with two Ethernet interfaces being reported by ifconfig - eth0, and eth1. eth0 is an onboard Realtek NIC, and eth1 is a D-Link ...
2
votes
1answer
26 views

How do kernel inform OSPF daemon when a physical interface status is down?

When a physical interface status is changed from up to down, there are 3 things related to the computer's current routing table and OSPF. The (connected) network for that interface and remote ...
0
votes
1answer
61 views

Routing tables with two network interfaces

When I try to access the internet with my raspberry pi via ethernet, it works, but when I do ifdown eth0 and try to ping any server outside my home network, it tells me connect: Network is ...
0
votes
0answers
31 views

enable/disable domain redirection

My router can be joined by clientes. enable // I'd like to redirect all trafic to an IP (13.37.42.1), I mean any IP and any domain. disable // Then I d like to be able to disable it. Then clients ...
2
votes
0answers
40 views

Difference between MTU for a route and MTU for an interface

There is a server I connect to over the WAN and somewhere over the route there is packet loss unless I set the interface MTU to 600: ifconfig eth0 mtu 600 Doing this causes problems with ...
2
votes
1answer
33 views

TFTP times out when connecting to Docker server

I'm trying to install FOG in Docker (via boot2docker for Windows) at my workplace as a bit of a learning exercise. FOG has a handy little script that installs everything for you, and that works great ...
-1
votes
0answers
17 views

atheros driver on arch-linux won't start access point [closed]

Can't create access point on arch % lspci -k | grep -A 3 -i network 06:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01) Subsystem: Dell Device 020c ...
0
votes
0answers
28 views

Linux VM as a firewall

I have 3 vms a->b->c. I want to setup b as a firewall. Traffic is routed from a to c through b and I put a file on c. How do I show that b works as a firewall (first show that you are able to transfer ...
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votes
0answers
28 views

How to list Networking capabilities? [closed]

How to obtain information on following questions on baic network capabileties: Is there Infiniband, which configuration? Is IPoIB configured? Is there fiber channel Is there Ethernet, which one? On ...