Managing and using network connectivity on a unix system

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Start Networking at login

What I would like to do: I would like to start my wireless network after login (As apposed to starting at boot). Using my login credentials to run the command: sudo netctl start network. Instead of ...
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1answer
82 views

Can't use hostname for my linux machine

I installed apache on my RHEL machine yesterday and found I could access it from a browser using http://. Of course, sshing using the hostname was also working. So, I made an index.html file inside ...
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1answer
131 views

Isolate subnets on the same interface

I need to isolate Subnets on a linux machine CentOS that act as gateway. I have the following scenario. CentOS eth0 pub ip addres eth0.1 192.168.1.1 eth0.2 192.168.2.1 Now eth0.1 and eth0.2 can ...
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1answer
3k views

How to make NIC team come up on boot in RHEL 7

To configure networking on RHEL 7, I created a JSON file for teaming, then ran these commands: ip link set down eno1 ip link set down eno2 ip link set down eno3 ip link set down eno4 teamd -g -f ...
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1answer
68 views

How to monitor network connectivity between the ports in different windows server? [closed]

I have a application hosted from one server which listens on to a specific port and listens to a service on a another server in a different port . Seeing error log between XYZ application hosted on ...
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1answer
135 views

pppoeconf login problem

I used pppoeconf command for setup a pppoe connection over the wireless in xubuntu 14.4 and follow all the steps based on ubuntu pppoe wiki but after run pon dsl-provider i cant connect to internet it ...
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2answers
815 views

no internet connection for a kvm guest. what could be wrong?

I have setup a kvm win7 guest on a debian host. It's been up and running for a while now, but I had not done much with it. What I had done (for sure) was to download putty. Today I wanted to try and ...
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2answers
740 views

Static IP addressing issue in Ubuntu on BeagleBoneBlack Rev C

I have my BBB configured to use a static IP address using the following in the file /etc/network/interfaces: allow-hotplug eth0 iface eth0 inet static address 192.168.0.1 netmask ...
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4answers
72 views

How do I find my Raspberry Pi on a big LAN?

I'm a college kid on a WPA2 Enterprise with a Raspberry Pi on ethernet. How do I find this device on the network? I could try running arp -a logging results to a file, connecting my Pi, and then ...
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1answer
373 views

How to test that my server is indeed in 1gbps connection?

I ordered a server and the host say I got 1gbps connection However, because I set up the server incorrectly, the speed drop to 10mbps I think now it has been fixed. But I want to make sure. This is ...
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1answer
67 views

PinguyOS latest version - networking problem

I installed PinguyOS on a friends computer. This computer is now displaying the following strange behaviour: Unable to set custom network. There seems to be only a provision for DHCP based ...
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2answers
2k views

Debian VLAN (8021q) Configuration doesn't work

I try to setup VLANs on a virtual Debian machine. It's connected to an Cisco 2960 Switch. The Switch has 3 VLANs (1,100,200) which're allowed the pass the trunk. The Switch Configurations was tested ...
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1answer
114 views

What is the foolproof/proper way to set hostname and domain on CentOS

I've seen a few ways of changing hostnames of domain names. One way is to issue the hostname command followed by the name such as: hostname localhost.localdomain /etc/sysconfig/network also has a ...
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1answer
849 views

Raspian, Huawei E303, Public IP address

After configuring Raspian linux and a Huawei E303 3G USB stick, I am stuck accessing the machine from the Internet by its public IP address. Details: The E303 stick was configured to work as an ...
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1answer
167 views

Route a local connection via an ethernet link in QNX

I am currently facing a challenge in QNX, where I have 2 Network Interfaces - viz. one Network port from PCIe Ethernet Expansion card (wm0) and other from the normal Ethernet port (en0). I have ...
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1answer
120 views

Possible to Host LAMP VirtualBox for Internet Site [duplicate]

Can someone explain briefly, or point me to, how to host a LAMP server on a Linux-based VirtualBox (Oracle) such at the web site on the VB are accessible to the outside world? The Host itself would ...
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1answer
35 views

How to configure internet connection in X Window System applications? [closed]

I have to work on a Windows machine which I'm using as a client for my external RedHat machine. According to my job requirments I need to use some X window apps which are hosted on the Linux machine. ...
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2answers
246 views

What is the simplest method to redirect traffic using either a proxy or iptables?

I need to redirect all incoming traffic on port 7777 to a specific destination_ip:port. I have about 40 Litecoin (scrypt) mining rigs that I have to manually reconfigure each time I'd like to switch ...
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1answer
836 views

Ping to my own public IP results in host unreachable

First of all, I'm running a Manjaro 3.10 (Archlinux x64) install. I'm trying to make my No-IP configuration work. I have tried to ping my no-ip host and I recieve host unreachable ICMPs only. I was ...
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2answers
113 views

How to estimate server's network connection quality with traceroute?

I need to estimate network connectivity of various dedicated server hosting providers, e.g. how fast and uniform will my services perform when hosted there. I use traceroute command on my home ...
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1answer
105 views

Change network values from sysctl.conf

Can I change the value of those parameters (spoofprotect, syncookies, dynaddr_hack, notimestamps, nobroadcasticmpecho, ip_forward) from sysctl.conf file in systemd?
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1answer
126 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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1answer
185 views

Why won't my computer connect to my Linux access point?

I'm setting up a Raspberry Pi as a proxy access point which accesses the internet via my USB tethered smartphone and is connected to my Windows PC via Ethernet. The internet works fine on the Pi, but ...
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1answer
187 views

Solaris 10 IPMP and zones

Is there a way to have an IPMP group Virtual IP only be assigned to a none global zone ? The reason I ask is the need to reduce the number of IP addresses, as we only have so many spare. If I have ...
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1answer
142 views

External IP check reports different IP from /etc/network/interfaces

My ISP gave me static ip range for internet access: 123.123.123.120-125 (Debian) /etc/network/interfaces: auto eth1 iface eth1 inet static address 123.123.123.120 netmask 255.255.255.0 gateway ...
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2answers
136 views

how to get the return value of wpa_supplicant?

My question is really simple I want to get the return value of the command wpa_supplicant, when connected to the internet, to know that I am connected or not with a shell script.
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1answer
522 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
225 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
390 views

Multiple SSH tunnel through raspberry pi?

In my home network I have a PC, raspberry pi, macbook and a few other devices which I want to access away from home. As it stands, I have setup VNC server on my PC along with remote desktop and have ...
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1answer
3k views

What is the effect of rsync --block-size on large files?

I want to backup a few terabytes of large files (500mb to 1500mb each) to a backup server (BULK storage) via rsync. For this I use the following command (updated with suggestions from @Gilles): ...
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1answer
514 views

kvm usb modem passthrough

I'm trying to set up a USB modem passthrough in kvm virt-manager. The host is Fedora 20. The guest is Centos 6 $ ifconfig wlp0s29u1u6: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether ...
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1answer
152 views

How to automate route commands

For some reason everytime I connect to my VM I have to manually launch these two commands for it to connect to the Internet. route add 198.245.49.254 dev eth0 route add default gw 198.245.49.254 Is ...
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1answer
107 views

Kernel panic on “apt-get upgrade” with DWA-160

I'm running on a minimal Ubuntu server 12.04.3 install and I installed a d-link DWA-160 usb wifi adapter as per the instructions shown in this page. After successfully connecting using these ...
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1answer
375 views

How to recognize hostname on the port number 8080 in Ubuntu machine?

I have a very basic question here. This thing is puzzling me a little bit. I have two machines, one is my local desktop running Windows and I have cygwin installed in it and second machine I have is ...
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1answer
167 views

What tool to use to monitor network issues? [closed]

I need a network analysis tool that can help me to find if there are some issues regarding: packet transmission sessions any other stuff is welcome. I'm connected to the appliance I need to check ...
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1answer
331 views

iptables - why the stun, turn ports are not working to allow end points to access the server?

I have this iptables where all working except tcp/udp port 3478 and 5349. $ cat /etc/sysconfig/iptables # Generated by iptables-save v1.4.7 on Thu Nov 21 10:21:41 2013 *filter :FORWARD ACCEPT [0:0] ...
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1answer
2k views

virtual box debian guest with nat & host-only adapters: 'No route to host' when trying to access host from guest

I have just set up a Debian guest inside VirtualBox, on a Fedora host. I use two adapters: NAT (internet for the guest, which works fine) and host-only (ssh from host to guest, nfs, etc.). I am able ...
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3answers
466 views

Why do two Ubuntu systems in the same network behave differently in DNS resolution?

I have two systems, both running Ubuntu 12.04, which are within the same network (connected by hubs without routing logic). Both systems are configured quite similar, but not identical. In particular, ...
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1answer
367 views

Connect from Windows 8 from home network to office Linux server

My client's office has a Linux server. Whilst I am in the client's office, I am able to connect to their Linux server from my Windows 8 laptop using PuTTY with their wifi connection. I wonder is it ...
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1answer
296 views

What is linux peth* and virbr* network interface?

Usually when execute ifconfig I got the "usual" network interfaces: wlan0, eth0 and lo. Those, I suppose to be my PC's wireless adaptor, ethernet adaptor and localhost. I'm using a remote server that ...
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1answer
1k 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
852 views

Unix: How to Test Ip Address is resolved to name

Unix: How to Test ip Address is resolved to name. I need to check whether ip address can be resolved to name using DNS entry via shell script. Code: DNS_Lookup() { LOOKUP=$(nslookup $1) ...
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1answer
322 views

How to get switch MAC address if it's a layer2 one?

arp -a doesn't show it. How can I get the MAC of it then? (on ex.: from a Linux)
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2answers
177 views

How to attach my domain with bind in real www

How to attach my domain with bind in real wwwI install bind9, with apache. By God's very grace every thing went smooth. my dig, host, nslookup and ping provide this info: my system ip address: ...
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2answers
458 views

NetworkManager controls my wireless card, but it can't find any networks?

I have a Broadcom wireless chip which I've managed to wrestle into working with Debian GNU/Linux (I'm on Sid, if it matters). The interface is definitely there: 612 ± ip link 1: lo: ...
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1answer
379 views

Which book of those two should i read to study networking for Unix/Linux administrator? [closed]

I'm quite a beginner to networking, I want to get the information that i need as a Linux/Unix admin. I have two books in hand right now: TCP/IP Illustrated, Volume 1: The Protocols UNIX and ...
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1answer
202 views

Unable to access http service intranet

I'm not sure if this is the right place, if this is the case I will move the question with no problem. I'm setting up a web server for testing Wordpress. Everything works fine if I try to access the ...
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1answer
633 views

Tacacs over IPv6

I have migrated my Redhat Enterprise linux server 5.5 to IPv6 . Now I want to run tacacs+ for IPv6. When testing from my client, it returns "unable to connect to server for IPv6 address", but for IPv4 ...
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1answer
231 views

Read and parse XML input via TCP [closed]

I'm setting up something where I'll need to be able to setup a service that accepts input on a TCP port and then parses the XML provided and extracts the necessary data, then posts that to Google's ...
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1answer
55 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?