Managing and using network connectivity on a unix system

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unable to ping gateway and CLAN in Linux but pingable in Windows PC

We're installing RHEL 5.5 for our Voice Portal (Avaya). After configuring the IP address, gateway IP, and netmask we tried to ping it so we could see if it was pingable/active or not. Sadly its ...
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2answers
174 views

Reverse Loopback

How to configure reverse loopback on an ethernet device? In that case, all the traffic received will be sent back to transmitter connected to ethernet port.
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3answers
880 views

Is there any way to see how much data I sent via Internet?

A big German ISP (Telekom) recently decided to volume limit their DSL internet connection to 75GB per month. Now I would like to know how much I download / upload. I use Linux Mint 14 Nadia and I ...
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1answer
684 views

Network goes down when LAN cable plugged in

As per subject, I have a Zimbra mail server on Centos 5.5. and the problem is there that when I plug the LAN cable in to the server port all Internet and network services go down. This means the ...
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3answers
2k 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: ...
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917 views

how to configure USB networking on fedora

I have a Samsung smartphone, which can be connected to a free WIFI network, but my laptop can't connect to that WIFI network. So I want to use my smartphone as a router/forwarder. I want to connect ...
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2answers
13k views

Arch Linux - connect: Network is unreachable

After 5 unsuccessful Arch Linux installations, I've got two that installed correctly. The first time, the network worked fine, and I was even installing it over SSH. After booting from the installed ...
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1answer
302 views

tshark command for finding MAC of a specified network

What tshark command could start listening to a specific network and see who (MAC-wise) is connecting to it? I already have the network card in monitor mode at the correct channel. WireShark can ...
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1answer
83 views

Does IPTraf includes its own activity in the report?

Does IPTraf includes its own activity in the report? If it does how do I exclude it?
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2answers
21k 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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0answers
96 views

How can I solve segmetation fault on ns2.35

I am trying to compile make on ns2.35 after I add patch of codel algorithm and it gives me this error make[1]: Leaving directory ...
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1answer
727 views

tun0 enabling after installing openvpn

I just installed openvpn but can't see tun0 when I do ifconfig. when I ssh to a remote server, I get the error: debug1: Authentications that can continue: publickey,password How can I enable it? ...
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1answer
44 views

Viewing hostnames in network

Is there Linux command equal to Net View in Windows, that shows hostnames in your network? I am in a VPN network and want to see computer names in my network.
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1answer
156 views

Is there any tools which can be used to make ports available from any firewall network?

I have been testing my application which has TCP/UDP ports for peer to peer with the help of server signalling commands for making communication, that works when I have Public IP or Lan IP and not ...
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1answer
368 views

Client can't see DNS server on Ubuntu 12.04 Server with two ethernet cards

I'm running Ubuntu 12.04 Server with Webmin, bind9, and a GUI. It has two ethernet cards: eth0 coming in, and eth1 to talk to clients. My client gets an IP address from DHCP, but cannot connect ...
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1answer
455 views

Is it possible to configure applications to use different network interfaces differently? If yes, how?

I am running scrapy on ubuntu server 13. And while it is crawling the network becomes very slow and it becomes difficult to even ssh into the system. I think I can solve the problem by having one ...
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2answers
3k views

How to know ip camera address

I have ip camera with static ip address preset. How can I know it ip using linux? I connect camera direct to my notebook. My system is Linux machine 3.5.7-gentoo #2 SMP ifconfig eth0 eth0: ...
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3answers
6k views

D-Link DWM-156 HSPA USB Modem doesn't work with SIM card inserted

I have a D-Link DWM-156 HSPA modem, that I bought just a few days ago. The modem has drivers in its internal storage. There are Debian packages (.deb) for both i386 and amd64, so obviously I installed ...
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1answer
64 views

Can connect from RPi to laptop, but not other way around

I'm developing a server-client application (command-line based) in Java. I want to run it on my Raspberry Pi (RPi), but it turns out I can't login to my server-part from my laptop. The problem is that ...
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1answer
114 views

RapidIO packet filtering in Linux

I was wondering if there is support in Linux Kernel for RapidIO packets filtering, something similar to iptables, but based on RapidIO header?
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1answer
4k views

Connecting to network with terminal

I have a router at home with ESSID of dlink_home and 10 digits (0123456789) 64-bit WEP encryption of Open Authentication Type. I want to connect to it through terminal with bash commands, I tried ...
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0answers
59 views

Can we Bring Up eth1 after removing e1000e modules?

I am trying to setup TCP in RTnet. I am not sure whether its possible. I read that RTnet is not supporting TCP. Is that so? So now I am trying to setup rteth0 as server and eth1 as client. To setup ...
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2answers
3k views

Is VMWare causing my Linux host to lose network connectivity?

I recently upgraded to Xubuntu 13.04 from 12.10, which required uninstalling and reinstalling VMWare Player for Linux. Soon after (not exactly sure the timing) I lost network connectivity on my host ...
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3answers
4k views

how to get network QoS statistics in linux kernel?

Is there a way to get the bandwidth, delay, jitter collision, error rate and loss rate of a certain link through the interface on a local machine? let's say my machine is connected to a network via ...
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1answer
307 views

Bonded Interface Pair Performance Difference b/w CentOS 6 and RHEL 6

I have two new dell servers, both pretty close to the same hardware. One has RHEL6 installed and one has CentOS 6 installed. I have the machines configured identically from a network-scripts, ...
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1answer
2k views

Can't access XAMPP on Centos from other Windows PCs

I have a server with Centos 6 on it and I have installed XAMPP on it. I have this server on static IP address. But I can't access this server's IP address from other PCs. I tried to access XAMPP on ...
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3answers
6k views

QEMU how to ping host network?

I'm trying to ping from guest to my host network without success. qemu-system-x86_64 -hda debian_squeeze_amd64_standard.qcow2 -netdev user,id=user.0 -device e1000,netdev=user.0 I try to ping a ...
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1answer
752 views

How to get rid of dummy interface?

Hey guys I have a strange problem. There isn't an eth0 interface on my Linux embedded (ttylinux v7) client instead I have a dummy0 interface. With this interface I can't ping anything, and I think it ...
2
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1answer
163 views

How can I be sure that access to my home server from my home network is not done via Internet?

As advised in this question: Network file-sharing between Linux and Android, I have decided to use ownCloud to store files on my home cloud server. However, my needs have changed a bit. I want to be ...
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2answers
121 views

How to delete inet6 Link address automatically?

There is an inet6 addr on the eth0 interface: eth0 Link encap:Ethernet HWaddr 00:0c:29:d9:46:f5 inet6 addr: fe80::20c:29ff:fed9:46f5/64 Scope:Link UP BROADCAST RUNNING ...
2
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0answers
505 views

Bonding configuration on a blade server with Oracle 6.3

I'm trying to configure a mode 6 bonding on a blade server. Blade Enclosure: HP c7000 Blade Server: ProLiant BL460c G1 Redundancy part of the bond is working, I can pull out any one of the cables ...
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1answer
1k views

Network file-sharing between Linux and Android

I want to share the contents of my external HDD with my Android phone. For the last two hours, I've been trying to correctly set up Samba - it was absolutely horrible. There must be another, simpler ...
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1answer
304 views

Parsing protocol and url from packet payload

We are using pf_ring to capture packets. We are able to decipher information like source and destination ip, mac etc from the header information. Now we are moving into payload to decide the type of ...
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2answers
1k views

Open and redirect port

I'm trying to set up SNMP for a router so I can monitor it from an existing Nagios installation on an off-site server. I'm having trouble getting the router to respond to SNMP requests from the WAN, ...
2
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1answer
175 views

How can I be notified about state changes to a VPN adapter

On Ubuntu 12.04 - actually Kubuntu, but I am using NetworkManager, so the configuration should be the same - I have configured a few VPN connections. Now, if I have a long-running up- or download, ...
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1answer
184 views

IP Address inaccesible

My Linux machine is inaccessible by the IP address, as in only http://127.0.0.1:8080/projectname or localhost works on the browser, but http://10.1.5.5:8080/projectname doess not (here ...
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0answers
367 views

Super slow internet requests

My Internet connection seems to be extremely slow on loading pages, specifically (it appears) when the browser sends the request for the first time. It takes like 5-6 seconds just to send the request ...
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6answers
47k views

CentOS no network interface after installation in VirtualBox

I have Ubuntu 12.10 on which i installed virtual box on which I setup centos 6.4 i386. On Ubuntu I have: 3.5.0-17-generic kernal running. On virtual box I install centos 6.4 and everything works ...
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1answer
801 views

Ethernet-bridged OpenVPN server not accepting connections from outside

I have configured an OpenVPN server with ethernet bridging using this howto and this page regarding ethernet bridging. The server is also running Samba, Apache and Webmin. Linux klesk 2.6.32-5-amd64 ...
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2answers
811 views

Getting internet to Linux VM without being detected by Network

I'm trying to get internet to a Linux VM (Backtrack 5 on VMWare Workstation). Unfortunately I was told to not "bridge" the connection from the VM because it could be detected by our companies network ...
2
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0answers
320 views

Windows shared network printer keeps using rear tray as source

I am trying to set up network printing on my Linux Mint 15 (64 bit) system (dualboot with Windows 7). The printer is a Canon PIXMA MG5100 and is connected (via USB) to a computer running Windows XP. ...
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0answers
99 views

How to associate a seperate station to a Wifi AP

My Linux machine (A) is connected with some Wifi AP over my wireless device (wlan0). I want to give some other Linux machine (B), which is connected to me by ethernet (eth0), access to this network. I ...
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0answers
110 views

coLinux strange networking trouble

Installed coLinux, Debian, sshd inside, pcap-bridged networking, and I can connect to ssh service from coLinux console and from LAN. Now, the strange part: I cannot connect to Linux guest ssh service ...
3
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1answer
120 views

Internet disappears regularly

About a month ago I installed the newest version of Linux Mint (14). I use Linux the whole day on my laptop but every 1-2 hours my internet connection (Wi-Fi) magically disappears for about 10 ...
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3answers
9k views

Include domain name or not in /etc/hosts?

I am setting up a VMWare cluster of CentOS nodes. Is it best practice to include a domain name after the machine? What are the potential problems of leaving it out? Does a domain complicate ...
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1answer
176 views

simple hostname resolution on LAN [duplicate]

I read this question How to make a machine accessible from the LAN using its hostname What is the simplest way to enable a LAN of Linux hosts to identify each other by hostname? Obviously each host ...
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2answers
15k views

Renew IP with dhclient on different interfaces

I have two interfaces on my computer, eth0 and eth1. Both subnets have a DHCP server on them. How could I use dhclient to renew IP address for both interfaces? If I do: dhclient -r && ...
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1answer
2k views

Setting up an ad-hoc network on boot

I'm pretty new to Linux; this project is me trying to learn more. I've done login scripts before but not boot scripts, so that's one of my questions. My other question is how to get an ad-hoc ...
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3answers
2k views

How to setup transparent firewall using ArchLinux

I am trying to setup a Transparent Firewall using ArchLinux. My setup looks like this: (ISP, IP: 10.90.10.254) \ \ \ (eth0-> ip: 10.90.10.1 gateway: 10.90.10.254) +-----------+ | ...
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1answer
112 views

Hardware Ethernet IP Limitation

In Linux Environment How many number of IP address I can assign to a Hardware ethernet interface ? Is there any limitation ? what is the maximum no. of virtual ethernet interface I can assign to a ...