Managing and using network connectivity on a unix system

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570 views

Setting up hostapd with a iwlwifi device to run a hotspot

I am trying to configure my opensuse 13.1 system to function as a hotspot (on my dell xps13 computer). So I tried setting up hostapd as explained here, but I get an error: hostapd ...
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27 views

pfSense and Belkin Integration

I am in a unique situation. I want to have my previous Linux box as a router, but I don't have wireless capability on it or even a second ethernet port, so I was wondering if there was a way I could ...
0
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1answer
90 views

How to add Ip Aliases with Two Gateway on same nic Centos

I have 2 allocated address range, example 10.10.12.25/28 10.12.12.24/28 How to add Ip Aliases with Two Gateway on same nic with Centos?
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1answer
235 views

mutliple default gateways for alias interfaces (SOLVED)

Alias interfaces defined in /etc/network/interfaces cannot have multiple default gateways. Unfortunately I would like to use the same interface to access 2 differents nets, and I need to define 2 ...
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21 views

netatalk virtual users using ftppasswd (not found) on Debian wheezy

I configured my ProFTP server for using virtual users using the ftp.passwd file. Then I used the following command to add a user: ftpasswd --passwd --name developer --uid {www-datas uid} --gid ...
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1answer
56 views

How to access my webserver from the host machine? [duplicate]

My host OS is Gentoo, guest OS - Fedora. I have a web server on Fedora on port 8686 and it works perfectly on guest OS, but I can't access it on my host OS. I tried to use bridged network (then I got ...
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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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2answers
86 views

Lose network connectivity when bringing up second NIC

I currently have a CentOS 6.5 box with 4 NICs. eth0, eth2 and eth3 all come up fine, however when I bring eth1 up with an IP address, even on it's own, it causes complete network loss. If I remove ...
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1answer
265 views

bridge does not forwarding packets centos

I am using CentOS 6.5 64 and use xen to create a virtual machine (CentOS) ifconfig [root@CentOS ~]# ifconfig eth0 Link encap:Ethernet HWaddr 08:00:27:54:B3:FA inet6 addr: ...
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1answer
280 views

Airdrop compatible

Is there anything in Linux that implements whatever it is that makes Airdrop in OS X work? I'm not really familiar with that program, so I'm not sure what protocol it's using to communicate. update ...
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2answers
420 views

How can I find available network interfaces?

This is in regard to linux, but if anyone knows of a general *nix method that would be good. I booted a system yesterday with an ethernet cable plugged in. "NetworkManager" is not installed, so once ...
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2answers
77 views

How to create Virtual Network for VM's

I have downloaded a Linux Live CD which I am required to do pentesting using VirtualBox . Live CD is configured for router with Pool Starting Address 192.168.2.2 . Now problem is that my router is't ...
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1answer
50 views

Create a VPN network between a live server and private networks

I have a VPS (Cent OS 6) on a live IP. I have several other machines (All linux, mostly Cent OS 6 and a few Android devices) sitting behind NATted ADSL Routers on several sites. I need to create a ...
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1answer
31 views

What is the meaning “MAC MISSMATCH”? [closed]

I have every day in the log the few lines start with: MAC MISSMATCH:IN=vlanXX OUT= MAC=ff:ff:ff:ff:ff:ff:bc:ae:c5:da:70:a6:08:00:45:00:00:4e SRC=xx.xx.xx.xx DST=xx.xx.255.255 LEN=78 TOS=0x00 ...
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2answers
41 views

How to configure Unison for real peer-to-peer?

I have a handful of devices, and am considering keeping them in sync with Unison. The devices are not running all the time, they are switched off a few hours per day, not necessarily at the same ...
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3answers
448 views

traceroute and ping from school network

I have a server in my school. If I do a traceroute command for some host within our school network, I am able to reach the host. So for example, traceroute hostname.xxx.edu traceroute to ...
2
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1answer
100 views

Redirecting Request on Device in Access Point Mode

I have a Raspberry Pi with a wifi dongle that is configured for Access Point mode (wifi hotspot). When a user is connected, I want to redirect any url they enter to a specified IP (the devices ...
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3answers
277 views

How to configure a computer as a hotspot?

I use OpenSuse 13.1 (with KDE). On my phone I can turn on a hotspot just by pushing a button. I have been researching how to do this on linux, I haven't found an easy way yet. What I want to ...
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1answer
32 views

How to connect to wifi on a Gnome 2.24.1 system?

A friend gave me an old laptop running Gnome 2.24.1. It's been in storage for years but seems to run fine, albeit with this old OS. Now, I don't know too much about Linux, but I'd like to set it up ...
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1answer
47 views

Using WiFi port as redundant link

I want to use WiFi port of my server as redundant link for copper connection to my home DSL router. My router if SAGEM 2704 with very limited functionality. So practically the only possibility is to ...
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0answers
23 views

How can I use iptables to block certain processes from accessing the network? [duplicate]

I can set the processes to run under special uid's and use the technique from this SF answer: -A OUTPUT -m owner --uid-owner 400 -j DROP ...But are there any other ways to blacklist based on the ...
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2answers
156 views

SSH session through OpenVPN cuts off / locks up after a few lines

I have a large number of identical fanless PCs running debian 6 (ARM). Most of these are connected via comcast and work ok. There are some that are connected to 'WiMax' modems and are having ...
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0answers
32 views

Why, When and Where is phy used

Reading that iwconfig is deprecated and should be replaced by iw, I was for the first time confronted with phy. I understand that phy0 and so on represent physical devices, and perhaps iwphy # is ...
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2answers
677 views

ssh from host to guest using qemu

How do I setup ssh from the host to the guest using qemu? I am able to use port redirection when I boot the VM without any special parameters, as follows: /usr/bin/qemu-system-x86_64 -hda ubuntu1204 ...
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0answers
80 views

no network connection

I am Newbie to CentOS. I have problems with my network connection eth0 I created /ifcfg-eth0 file since it was not present at /network-scripts. I tried ifconfig which does not display eth0. I have ...
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0answers
20 views

A Way Around: Host Accessing Guest in Internal Network?

folks. I have installed a Linux virtual machine in VirtualBox with 2 adapters: vnet0 is a host-only network and vnet1 is an internal network. I am able to get the IP address given by vnet0. ...
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2answers
391 views

Redirect requests to my external IP/port to an internal IP/port?

I have a dedicated server running KVM virtualization with n public IP addresses dedicated to n-1 web-facing virtual machines. Now I'd like to set up some web-facing VM's that don't have a dedicated ...
3
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1answer
198 views

Arch Linux not picking up static DHCP lease from DD-WRT

I have a Arch Linux system on my home network and its MAC address is setup in my Linksys running DD-WRT to receive a static lease. However, this system is not getting the static lease from the DD-WRT, ...
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2answers
103 views

How to determine eth0 gateway address when it is not the default gateway?

In my system I have eth0 (which may or may not be connected) and a modem on ppp0 (which always may be up or down). The the case where both interfaces are up and ppp0 is the default route, I'd like to ...
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1answer
104 views

Masquerade not working sometimes

I have an issue with private network traffic not being masqueraded in very specific circumstances. The network is a group of VMware guests using the 10.1.0.0/18 network. The problematic host is ...
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0answers
127 views

Ping IP works, nslookup fails. New Kernel

I am compiling my own 3.14 kernel. I fear I may have left out some important networking feature to get DNS working. I can't resolve domain names. I can ping my DNS server. I can resolve using that ...
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1answer
204 views

Where is my eth0 configuration on Wheezy

I have a perfectly happy Debian Wheezy 7.4 install that sets up eth0 as DHCP. But as I want to set a static IP address for it, I navigate to /etc/network and open up the interfaces file and see the ...
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2answers
4k views

Yum update problems on CentOS 6.5 minimal as VMware guest

INFO: I am using Windows 7 Pro (64bit) with VMware Workstation version 10.0.1 . I am using CentOS(64bit) 6.5 minimal, for the first time. I am running this from my workplace network, which may use a ...
2
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1answer
73 views

Multiplex bash function execution

I created a bash function to "automagically" connect on our switches and retrive their startup-config using the expect command. I have to use expect because this switch does not accept the ssh ...
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0answers
66 views

linux VM ware + ifconfig

I have linux machine red-hat 6.3 VM machine when I run the command ifconfig -a I see also the interfaces - virbr0 and virbr0-nic what I want to get is only the interfaces eth0 and lo without ...
1
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1answer
70 views

Kernel optimiziations for ioctl AF_INET operations

Our server solution handles many tunnel operation requests (add/update/delete) using the ioctl interface, and the AF_INET address family socket. Aprox. numbers are 100 operations/minute with over 8k ...
3
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1answer
53 views

how to write a startup dependency on Internet availability?

Some of the services on my Raspberry Pi (~ Debian) depend on the availability of Internet (especially ntpd, for cryptic reasons). Specifically, the availability of a network device or a link being up ...
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0answers
30 views

Ubuntu + CISCO VPNC CLIENT for my new ubuntu version (32 bit )

I have newest Ubuntu Linux version 10.04.4 (32 bit ) I want to install Cisco VPNC client on this linux machines in order to connect to other customers I little confuse , which VPNC cisco version ...
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1answer
92 views

iw: what's the default channel bandwidth?

I'm using the iw tool to configure a WiFi interface to sniff the air (monitor mode) on specific channel: ifconfig wlan0 down iw dev wlan0 set channel 1 iwconfig wlan0 mode monitor ifconfig wlan0 up ...
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2answers
266 views

Why is my BCM43142 chipset is not recognised and device wlan0 not found?

I'm trying to setup the WiFi connection on my Lenovo B590 but I get the following error : ifdown: interface wlan0 not configured wpa_supplicant: /sbin/wpa_supplicant daemon failed to start ...
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1answer
67 views

IP address of a mounted network directory

I have mounted a network directory to /mnt/svr with the following fstab configuration: # <file system> <mount point> <type> <options> <dump> <pass> ...
2
votes
1answer
50 views

How to handle DHCP on two network interfaces, one clobbers the other's /etc/resolv.conf

I have an embedded Debian Linux system. It has two network interfaces, eth0 and ppp0 via a cell modem. The problem I have is that when the system boots up it gets an address via DHCP on eth0. If ...
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2answers
104 views

Retrieve value of RTS threshold without iwconfig

Is there a way in OpenWrt to read the current value of the RTS threshold for a specific interface without installing iwconfig? What I'm looking for is the value of RTS thr that can be found in the ...
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1answer
68 views

How do I restart the network or ask the system to seek a refresh IP from the DHCP?

I'm running a Minix using VirtualBox. Minix is set to use the DHCP. And the network adapter is using a bridged connection*. When I last saved the state of the machine its IP was 192.168.1.11 ...
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2answers
74 views

Different sites on different interfaces using link aggregation

I read about Ubuntu Bonding and how it allows to bond multiple connections to get several advantages. My requirements is this : I want two different interfaces at a time (A wifi and other Ethernet) ...
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1answer
125 views

What is the interface scope (global vs. link) used for?

Routing table entries have an attribute scope. I would like to know how the change from global to link (or the other way round) affects the network system.
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1answer
42 views

How to use one nic for storage traffic & other for network traffic in Linux(Slackware)?

Problem I have a Linux machine (Slackware) with two network interface cards and i want to use one interface for network traffic and other for storage traffic . As this is Slackware i dont know this ...
5
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4answers
305 views

History of IP addresses that accesed a server via ssh

It has come to my attention that a server of mine has been hacked and infected with a known chinese botnet. It was a prototype/testing virtual machine with its own static IP(US address) so no harm ...
2
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1answer
314 views

CentOS 6.5 have to manually add the default route

With CentOS 6.5 on an R710 I have to manually remove the default route; and sleep 10 before adding it back otherwise the interfaces do not use the default route that was added upon boot. There are no ...
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2answers
158 views

Route add gw: how to

I'm in a network with IP 10.0.1.X (pc A). There's another sub-network: 10.0.3.0 I can ping pc B connected to this network: ping 10.0.3.X ---> OK Now, B is connected also in wifi to a network ...