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10 views

Why do I get “authentication” errors on this “Open” configuration?

I have the following ifcfg-wlan0 file: DEVICE=wlan0 BOOTPROTO=none ONBOOT=yes IPADDR=192.168.5.1 NETMASK=255.255.255.0 NETWORK=192.168.5.0 NAME=wlan0 USERCTL=no the following dhcpd.conf file: ...
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0answers
19 views

IPv6 - how to force traffic destinated for same system but another interface to pass through the wireless network?

I want to perform some IPv6 stress testing (file transfer, flooding, Neighbor Discovery, etc) on wireless routers using a system which has two network interface cards. However, all traffic goes ...
2
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2answers
60 views

Is there an equivalent book/resource to “The Linux Programming Interface” for FreeBSD?

Most of you here are probably aware of the famous The Linux Programming Interface, which presents a truly masterful guide to the Linux and general POSIX APIs. I know that much of the general POSIX ...
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1answer
68 views

If NM_CONTROLLED not set what is the default value?

If /etc/sysconfig/network-scripts/eth0 does not include any NM_CONTROLLED setting, what's the default behaviour?
1
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2answers
95 views

Primary network interface in Linux

I have a server box with two interfaces. One of the interfaces is connected to the internal network, another - to external. I have assigned IP 192.168.1.200 to internal interface (eth0). I have some ...
0
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3answers
74 views

How to see if an interface is connected in Centos/Linux

With Centos installed on a server with 2 onboard ethernet ports, how can I check which port has an IP? In windows you can go to network & sharing center and you can see the network interface with ...
1
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1answer
45 views

How does Fedora name wireless interfaces?

Until recently, my network interfaces were always named eth{0..x} or wlan{0..x} depending on what type they were. However, now I see that I have em1 for the ethernet card and wlp3s0 for the wireless. ...
2
votes
1answer
58 views

What does lo in iptables mean exactly?

I have seen countless examples of this rule in iptables: -A INPUT -i lo -j ACCEPT I thought lo means localhost (a.k.a. 127.0.0.1), but when I commented it out, I can't access the server using its ...
3
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1answer
243 views

Good detailed explanation of /etc/network/interfaces syntax?

I understood the very basic concept of how to use /etc/network/interfaces, but all I find online are examples, example after example, which I can copy-paste from. What I miss is an explanation of the ...
2
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0answers
24 views

Manually adding static ip not resolved after a while

Hi Unix/Linux community, I have a small problem with a device I am connecting to my laptop, running Debian Linux. While connected to a router on my wlan1 interface (using wicd, if that matters), I am ...
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0answers
182 views

Adding a new interface on pfsense [ESXi 5.x]

I'm struggling to add a new interface on the pfsense as I already have a WAN & a LAN interface configured. Our server is enabled with two physical interfaces as both of them are connected to a ...
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0answers
118 views

No wireless interface detected in Linux

I'm using Backtrack5R3 via bootable CD and getting no wireless interface found output. These are the o/p of commands by which you can get details of my problem. My laptop model is Lenovo b490(20205). ...
0
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1answer
51 views

Define specific TTL for each interfaces

After some research, I was wondering if it was possible to define a TTL by interface as I can the Hop Limit definition in ipv6. To change the TTL in IPv4, I can change the file ...
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0answers
15 views

Setting up HotSpot with two outbound interfaces

I want to configure my HotSpot when having 2 outbound interfaces. wlan0 - HotSpot interface usb0 - outbound interface for wlan0 eth0 - outbound interface for any other connections. Is it possible ...
1
vote
1answer
234 views

Route HTTP traffic thorugh different interface

I have my normal eth0 interface and an setup ppp0 interface, the problem I have is that I want to exclusively route all HTTP/HTTPS traffic through the ppp0 interface and everything else through the ...
2
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0answers
52 views

How to route traffic to different interfaces for different ports [duplicate]

I have an eth0 connection providing internet connection through a proxy server only for port 80 and 443 (provided by university). For ssh, git and related purposes, I got a different connection on my ...
0
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0answers
32 views

Dial up interface query

I am using Fedora 13. I have three NIC's in my device, and I have configured dial up on third interface (eth2). After network restart, when I fire ifconfig, I can see entries as eth0, eth1, eth2 and ...
1
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1answer
287 views

Remotely accessing cassandra running on local loopback IP/port 127.0.0.1

I have been using ccm for some time and it's pretty awesome tool to test out admin stuff. Now, I really want to test modeling data by trying to access ccm running cassandra using Thrift based ...
3
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4answers
2k views

How to use ifconfig to show active interface only

By default ifconfig will show me all available interfaces , but what if I just want to display active ones? Like, en0 only in below. en0: ...
2
votes
0answers
845 views

How do I force ssh to use a second interface with higher metric?

I have a Crunchbang VM with two interfaces, eth0 and eth1, each of which connects to an OpenWRT VM (eth0 being 10.232.64.20 and eth1 being 10.232.65.20). I'm using Network Manager and DHCP. My ...
1
vote
2answers
299 views

Linux Operating System Graphical user interface [closed]

So I am currently looking into operating systems at the moment out of interest and have read quite a few articles and guides on making your own, I found Linux and how its possible to create your own ...
1
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1answer
38 views

retrieve the host interface name used by a VirtualBox interface in “bridged mode”

I need to retrieve the tuntap interface name used from my the VM interfaces in "bridged adapter" mode. I found that this information resides in the xml file of the VirtualBox VM under: val ...
1
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1answer
2k views

CentOS 6.2 black screen…help

I'm facing some problems with the CentOS graphical interface. When I try to reboot the machines, it seems everything okay. I can connect to the machine through ssh from other machine and it has no ...
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0answers
201 views

Difference between virtual interfaces with ifconfig and iproute2

I am wondering what is the difference between: # ifconfig eth0:0 1.1.1.1/24 and just # ip addr add 1.1.1.1/24 dev eth0 Btw I cannot do # ip addr add 1.1.1.1/24 dev eth0:0 RTNETLINK answers: ...
0
votes
1answer
139 views

Not able to run vnstat unless as root in debian 7

So, I need to run this command: vnstat -tr 2 But as a user I just created, not as root, as root it works fine, but as a regular user I get this: Error: Unable to get interface "eth0" statistics. ...
3
votes
3answers
1k views

Why is delay after ifconfig down needed before up if changing MAC address?

Hi I made bash script to put down my interface, change MAC address and get it up again. #!/bin/bash INTERFACE_STATUS=$( cat /sys/class/net/eth0/operstate ) echo "$INTERFACE_STATUS" if [ ...
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0answers
98 views

Centreon Web Interface Slow

Our Centreon web interface is so slow ! about 3/4 mins to have my click's results ... While Nagios is working perfectly ... Thanks to Google, i guess it comes from mysql. But I can't understand ...
2
votes
1answer
92 views

Troubleshooting internet connectivity

Recently I see that I often lose internet connectivity on my Linux machines. I am starting to think that it may be a router problem, but I have no idea to check if this is indeed the problem. ...
1
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3answers
487 views

What are the interface prefix meanings in ifconfig?

I'm not sure if these have a name, but on most computers I use the interface prefixes are usually: eth- : Ethernet/Wired wlan- : Wireless/WiFi However, on my ASUS RT-N56U, I have the following: ...
0
votes
1answer
98 views

Renamed network interfaces [duplicate]

A recent update on my Mint system caused the eth1 to end up being renamed as eth3 and therefore breaking all my firewall & forwarding rules. How does this happen? How can I enforce the network ...
1
vote
1answer
217 views

Postfix uses the interface alias instead of the primary interface

When sending e-mail with /usr/sbin/sendmail (e.g., using a script), Postfix causes the mail to be sent using one of the host's interface aliases (eth0:0, 74.50.122.55) instead of using the primary ...
0
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1answer
203 views

Regex awk to Cisco Interface

I would like to know if have some Sed/Grep or Awk regex to parse Cisco interface section, with specific attribute, like bellow. Content of file.txt ! interface FastEthernet0/1 no ip unreachables ! ...
0
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2answers
238 views

CentOS GUI problem using Gnome

For some reason lately when I try to set the date using the interface, or simply install a .rpm by double clicking the dialog that should prompt me to input my passowrd just shakes like it has a bug. ...
2
votes
1answer
55 views

switch network on and off of a virtual remote server

I need to perform a testing panel which disconnects a network cable and connect it again on a specific virtual server via a php web page. I found that ip & ifconfig can disconnect a network, but ...
2
votes
1answer
623 views

Wait for interface to brought up before UDHCP

I am using an embedded linux distro with busybox utilities. During system boot I am configuring my interface via DHCP in startup scripts. /etc/rcS.d/S40networking |---------> ifup ...
2
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2answers
3k views

Network naming on Arch Linux

I've just installed Arch Linux on my old PC, to do the installation I used wifi-menu wlan0, now I've reboot but if I type: ifconfig wlan0 up I have as a result: wlan0: ERROR while getting ...
1
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1answer
2k views

How do I set up several interfaces all bridged onto eth0?

I have found several guides to bridging a single interface (eg br0) onto eth0 but none for multiple interfaces (eg br0, br1 etc). Is this possible?