Managing and using network connectivity on a unix system

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2
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0answers
23 views

Manually configure Link-Local IPV6 regardless of ISP

The long and short of it is we have a system with a single ethernet port and we need to provide both an IPV4 connection (that can be completely incontrol of the user and varies per system) and we want ...
0
votes
0answers
25 views

Ubuntu machine hang and whole LAN network stopped responding

I am getting problems when my Ubuntu machine, it hangs(keyboard,mouse stopped responding, and screen looking blur). Also, the whole lan/wan network stopped responding. Please advise? ...
0
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2answers
41 views

No network capabilities in CentOS

I've just download and installed the latest version of CentOS inside a VirtualBox VM. Installation went OK, but when I start the VM and log in, if I try and ping anything I get an error due to lack of ...
-1
votes
4answers
58 views

Access directory on Linux machine from a Windows 7 machine over WAN

I want to access a directory ON a computer with Linux Ubuntu 14.04 installed as OS, FROM a computer with Windows 7 installed as OS, IN Windows Explorer. In case both computers have Linux Ubuntu ...
1
vote
1answer
64 views

Virtualbox - how to give Internet access and internal network access to two VMs?

I made two Virtualbox virtual machines, CentOS 7 latest iso. I gave them each 2 network interfaces, one NAT and one "Internal network" in order to get them to talk to each other and have Internet ...
0
votes
1answer
44 views

Help testing special file in `/sys/class/net/`

Background I am managing a cellular interface. I have a bash script that is testing the interface. In question is the file located at /sys/class/net/wwan1/carrier where wwan1 is an unconfigured ...
3
votes
0answers
356 views

Bridge interface - add default route

I used to connect my ubuntu 14.04 laptop on office network via eth0 and the route table gets updated with the office network gateway ip in auto mode. Now, i changed my /etc/network/interfaces ...
1
vote
0answers
203 views

pfsense: squid transparent proxy not working in bridge mode

I have installed the latest version of pfsense. I have setup it up in bridge mode after creating a rule any for lan and wan respectively. I have setup the squid on transparent proxy mode with ssl ...
0
votes
1answer
52 views

how to block ip addresses using the whois command

I am trying to block public ip addresses/ranges of specific organizations in my firewall. To accomplish the purpose, I need to find out the actual list of netblocks/IP addresses they own. For ...
0
votes
1answer
40 views

Measuring how much batteries lasts on another system? [closed]

I have both a Linux computer and Microsoft Vista laptop. I would like to know how much the batteries last on the laptop from the computer. How can I do a script for that, i.e. how to check on Linux ...
1
vote
1answer
16 views

Can't access website from other networks

I am trying to open a website since I was told to use and they gave me some tasks to do from there. I have always been able to use it from my work network, but not from other networks. And the guy who ...
1
vote
0answers
90 views

Systemd networking: IPv6 networking not available at boot

I've a Debian machine running multiple static IPv4 and IPv6 addresses managed by systemd itself at /etc/systemd/network/10-static-eth0.network as follows: [Match] Name=eth0 [Network] ...
1
vote
2answers
15k views

How to set up an Internet Connection in Linux Mint?

My machine has wired Internet connection with Windows 7 OS. In connection properties I see service name : ispone obtain IP address automatically obtain DNS server address automatically How do I ...
0
votes
1answer
27 views

How to disable QEMU guest access to host ports

I'm using the following command to run a QEMU VM: qemu-system-x86_64 -enable-kvm -m 1024 -smp 2 -hda disk.qcow2 By default, the guest OS has internet access, but can also access open ports on the ...
0
votes
0answers
35 views

Kali Dns Problems

I have a problem. So, when I connect to any wi-fi station I can't use google or yandex. I solved that. The thing was in dns. I added google dns servers to 'resolv.conf' and it worked fine. However, ...
0
votes
1answer
26 views

How to upgrade Open VSwitch in openStack Kilo

I'm using OVS integrated with OpenStack Neutron. OVS' version that I use is 2.3.2 and I want to upgrade it to the latest version released in Sep 2015. I tried to upgrade it by entering "apt-get ...
1
vote
1answer
37 views

DHCP release and renew over SSH?

I am setting up a DHCP reservation for my Raspberry Pi B+ on the wired connection. It's in another room. After setting up the reservation, I told it to reboot, and it did not get the new ...
1
vote
0answers
22 views

Deleting / renaming a network hardware port in OS X / Darwin

This is a problem that so far no one at Apple.SE could help me with, so I'm just gonna give it a shot to ask it in a different form over here. (I hope I'm using the right SE site... or is this better ...
3
votes
1answer
462 views

What are bogus file nlink values?

I am using files from a SMB share on my Raspberry Pi, running Raspbian. Whenever I access those files, I get the following message in my syslog: CIFS VFS: bogus file nlink value 0 What does that ...
1
vote
2answers
45 views

Is /etc/sysconfig/static-routes a deprecated method for adding persistent routes?

RHEL 5.x I'm comfortable with adding static routes via /etc/sysconfig/static-routes. When I was reviewing Red Hat documentation though, I didn't see this mentioned. Instead, the recommendation was ...
0
votes
0answers
24 views

What is txqueuelen equivalent for receiving in linux?

I have always wondered that txqueuelen in output of ifconfig command defines transmission queue length in linux in terms of packets which I assume get utilized in various qdisc management while ...
3
votes
2answers
892 views

change eth0 to eth1 without udev

I have a very interesting issue. We have Redhat 4 Linux and it is has 4 ethernet interfaces: eth0 eth1 eth2 eth3 Now, only eth0 is connected to LAN and everything is working fine. We have special ...
0
votes
1answer
203 views

What does the last column in this IP table mean?

I ran the following commands I found in a tutorial: $sudo iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT $ sudo iptables -L and got target prot opt source ...
2
votes
0answers
49 views

Copy remote btrfs incremental snapshot to new drive w/ UUID

Situation: Two machines (A & B, with local drives dA & dB) connected via slow network. Drive dA has initial backup to dB, while locally attached on machine A. btrfs send RO-snapshot-1-dA | ...
27
votes
13answers
31k views

How to get my own IP address and save it to a variable in a shell script?

How can I get my own IP address and save it to a variable in a shell script?
0
votes
1answer
24 views

Can Shorewall be used on VyOS?

Will VyOS still work right if I install Shorewall-lite on it? Shorewall seems like an easier way to setup a network, but VyOS seems pretty great for day-to-day management of a router / firewall. So ...
-1
votes
5answers
1k views

network: destination host unreachable

So Im using linux oess(centos). in the terminal im trying to ping 8.8.8.8 to see my connectivity. so it says: Network is unreachable Than I typed ifconfig: inet addr: 192.168.56.101 ...
0
votes
1answer
35 views

Can't setup ssh connection with bridge

I would like to set up an ssh connection to a device, which is bridge. It's a device to put between router and PC and the traffic just goes through. I don't have a ip-adress assigned to the bridge, so ...
1
vote
1answer
42 views

Netstat Listen Queues

What information can I gather from netstat listen queues? Looking at the man page I can see that using "-L" in netstat it shows me the size of listen queues. It tells me information about each ...
0
votes
1answer
17 views

Only One Resolver ip

so i was trying to setup Cpanel and i got this problem it asked me for a Secondary Resolver which i don't have i tried getting my ip resolver by typing cat /etc/resolv.conf in centos and it gave me ...
3
votes
1answer
378 views

Huge packet loss on openwrt

I have a strange issue on mikrotik rb951-2hnd router. I built image a few years ago using revision 39392 and patch firmwared it and everything worked fine. Just a few months ago I decided to update ...
1
vote
1answer
102 views

Why are routes set in /etc/network/interfaces not added when the interface comes up?

Here is my interfaces file: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp auto eth0:0 iface eth0:0 inet static address 10.20.8.231 netmask 255.255.255.0 ...
0
votes
0answers
19 views

Network between 3 VM's

I have a kinda dumb question but I have 3 VM's with TinyCore linux on board with wifi network drivers installed there. I have a task to connect 2 machines to 1 network - 1st and 2nd. Then to connect ...
0
votes
0answers
21 views

What utilities will allow me to see how much network data a process has used in a session?

I need to know how much network data each program/process are using on my machine. There are great tools (like nethogs) to give me information on current usage. However, it does not give me ...
5
votes
1answer
101 views

Bond two Internet connection of varying quality

I live in a remote part of the country, internet-wise. I utilize a satellite based internet, but it's having many problems during peak traffic times. I have researched a bit and found Ubuntu ...
3
votes
2answers
500 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: ...
1
vote
0answers
32 views

How can I enable jumbo frames on a bonded Xen bridge interface?

I have a Debian Jessie 8.2 server serving as an Xen VM host. The server has two physical network interfaces that are bonded together using LACP. There is also an xenbr0 interface. I would like to ...
1
vote
5answers
2k views

Setting a network hostname doesn't work

I'm on a Kubuntu 11.10 and I'm having trouble setting a hostname on the network. I already tried changing send host-name "myhostname" in /etc/dhcp/dhclient.conf or /etc/dhcp3/dhclient.conf with a ...
0
votes
1answer
43 views

Default Gateway on CentOS 7.x not setting

Trying to teach myself CentOS 7.x after slowly pulling away from CentOS 6.5. My problem is likely very simple in nature but I am still puzzled by it and would appreciate some input. Basically I am ...
-1
votes
1answer
16 views

Connect Docker container and host to different network

I don't know if this makes any sense, but is it possible to use WiFi in host but only mobile broadband in a docker image?
0
votes
1answer
20 views

Use a bond interface like a bridge

I was trying to set up a bridged interface in Micro Core Linux. There's no bridge available in the kernel.So now I would like to know if there's easy way to use a bond like a bridge?
3
votes
1answer
33 views

Two Virtualbox systems with same IP address

I need to test an issue with nfs so I spun up a couple of VirtualBox VM's on my system. One is RHEL7, another CentOS7. Each has a unique MAC address when viewing settings> network. Both VM's boot ...
1
vote
0answers
25 views

Making bind to listen to localhost in netns

I have a Debian Jessie running Bind. There is an OpenVPN connection set up. And resolv.conf set up to use local Bind first: nameserver 127.0.0.1 nameserver 4.2.2.4 I want to set up system in a way ...
2
votes
0answers
65 views

Why don't I have networking connectivity on my virtual machine?

I have a virtual machine called vnet208. I used to be able to ssh into it, but I made some changes a while ago and then we had some power outages and now I don't have network connectivity. I can get ...
0
votes
0answers
9 views

how to remove Queue in send_Q-part of netstat?

I have a tcp-server or may be it is lazy tcp-server because sometime the program dose not take the data from socket and i see some number is send_Q/recv_Q column of 'netstat -tn' command. is there a ...
1
vote
1answer
34 views

Change preferred NIC in default routes

I have a VM with CentOS 7.1 and two NICs: eth0, dhcp, 192.168.1.0/24, access to the host and the Internet. eth1, static, 10.0.0.0/24, between VMs only. I have configured IP and connectivity is ...
1
vote
1answer
69 views

How can I (re-)connect DNS for gmail on Linux Mint?

Let me refer responders to this thread on Linux Mint forums: Chrome/Firefox not loading Google websites I've seen this four times in the past two weeks or so. The loss of connection does ...
0
votes
0answers
12 views

Is there a way I can auto-connect to a network with a certain SSID using Connman?

I want to create a script that will auto-connect to a network if it has a certain SSID. I am not sure if that is possible with Connman. Can I tell Connman to connect with X credentials if it finds a ...
0
votes
1answer
25 views

Run concurrent static and DHCP network connections in CentOS 7

I've been trying to set up a VM for study purposes that can share some iSCSI resources on a private network with the IP 10.0.2.10/8. However, I also want to be able to concurrently use the same VM to ...
1
vote
1answer
38 views

Cannot obtain address via DHCP

I recently upgraded this box from Solaris 11.2 to Solaris 11.3. After that I cannot get an interface to obtain an IP address from within a non-global zone. From the global zone I have the following ...