Managing and using network connectivity on a unix system

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23 views

Historical bandwidth data in a console? (save/load statistics)

So, I found that nload and iftop displays the amount of data that passed and how fast. Now, is there anything like those that can save/load statistics? I want to measure the amount of data I download ...
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1answer
62 views

SIPp “hello world” message to Asterisk

How do I run diagnostics against Asterisk? Asterisk is running on tleilax; and doge is on the same network (My network topology isn't optimal). Specifically, I want to do something like: sipp ...
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1answer
35 views

asterisk network topology — KISS

is this the typical Asterisk topology??? On my home system, I have the Asterisk server, tleilax, and the client, doge, connecting into my router -- so that they're both on the same network. The IP ...
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1answer
60 views

yast routing problem — connect: Network is unreachable

---------------------------------------------------update----------------------- on doge the route works: thufir@doge:~$ thufir@doge:~$ route Kernel IP routing table Destination Gateway ...
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30 views

converting teaming to bonding

RHEL 7 contains bond2team tool but it doesn't contains opposite team2bond tool. I need to convert my teaming files to bonding (please don't ask why, this is for testing purposes). This is my teaming ...
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24 views

Manual network setting on Solaris 10

Am using Solaris 10 on Virtual Box. While installing I chose to assign IP manually. IP address: 192.168.1.46 Subnet: 255.255.255.0 Gateway: 192.168.1.1 Now when I ping my Solaris machine with other ...
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1answer
66 views

CentOS 7 very slow boot up after changing NIC

I have created a VM in VMWare esxi. I then cloned the VM, the clone receiving a new NIC along with a new MAC address. I change the IPADDR, HWADDR, and BOOTPROTO values and reboot the cloned-VM. ...
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22 views

RHEL6.6 in which file you put the gateway configuration

In RHEL6.6 OS system, which file we've to put the gateway configuration? I tried GATEWAY=xxx.xxx.xxx.xxx in these files : /etc/sysconfig/network /etc/sysconfig/network-scripts/ifcfg-eth0 and I ...
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1answer
86 views

iptables - Redirect except list MAC Address

I'm using iptables on my router to redirect all web traffic to my page. But i don't know how to except my mac address list. I did command like this: iptables -t nat -A PREROUTING -m mac ! ...
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4answers
130 views

Find a server IP on LAN from a script

I am looking for a way to have a script on a client machine automatically find the servers IP on the same network. I have several media extender clients running ubuntu 14.04.1 and a server running ...
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96 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 ...
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2answers
87 views

Send Mouse commands to PC with Raspberry Pi over the network

Is it possible to have a Raspberry Pi connected to a CCTV recorder via USB and send mouse input commands over the network? The video feed from the CCTV recorder is displayed on a TV with in the ...
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17 views

OpenWrt and Cisco - trunking

Can anyone help with trunking configuration with OpenWrt. I want to connect router which works on OpenWrt and Cisco Router using trunking. Until now I did this, but unfortunatelly it did not work. ...
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1answer
39 views

Smallest packet sniffer for an embedded device?

Are there tiny packet sniffers out there? I'm looking for something that can be compiled for a embedded device with very limited space. I thought of tcpdump but a dynamically linked and stripped ...
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1answer
45 views

Firewall: why no route to host?

I've LAN with two nodes. One runs fedora and acts as a server, and has some default firewall configuration bundled. Second runs arch (but that shouldn't make any difference). On fedora system, I have ...
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2answers
64 views

(SOLVED) Have ip address and wifi connection on mint 17 but no internet connection? [closed]

I have an ip address but no server found on browsers. Could be related to having been in hibernate mode? Tried disconnecting, turning router off etc. - no good. Can anyone help with how I might go ...
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1answer
45 views

Write access on mounting a Windows network share

I installed cifs-utils, and can mount the remote drive using the command sudo mount.cifs //DRIVE ~/homedir/ -o user=user,pass=pass,sec=ntlmssp However, the user account cannot write to the mounted ...
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1answer
172 views

What's the difference between “errors:” “dropped:” “overruns:” and “frame:” fields in ifconfig RX packets output?

Can someone please elaborate on the difference between the various RX packets fields in ifconfig output? For example, let's say I run ifconfig and see the following: eth0 Link encap:Ethernet ...
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0answers
17 views

Automate a gratuitous ARP every x seconds

There may be another issue here, so any other questions or comments are welcome. I have a CentOS 6.6 VM running under VirtualBox. It is connected to a GNS3 topology using a UDPTunnel. Everything ...
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1answer
42 views

Unable to connect to internet from Centos VM

I am using VirtualBox 4.3, I have installed centos 6.3. I have two adpaters attached. 1) NAT 2) Host-Only I want to be able to setup a cluster of 3 machines which can talk to each other and also be ...
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1answer
21 views

When using the spoofed IP option with arping no replies are returned

Host IP: 10.0.0.21 Spoofed IP: 10.0.0.112 Live IP: 10.0.0.138 When I normally run arping like: arping -c 1 -I wlan0 10.0.0.138 I receive a reply. However when I spoof the IP using a machine on ...
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1answer
137 views

How to set up wifi hotspot with 802.11n mode?

I have two computers running Ubuntu 14.04 (ok, one is actually Mint 17.1, but that's based on Ubuntu 14.04), and I am looking to use one as a wi-fi hotspot for the other. Both computers have identical ...
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1answer
30 views

How can I configure the default transmission rate for 802.11 (“WiFi”) in Debian 7 GNU/Linux?

I need to lower the transmission rate of my IEEE 802.11g network interface controller to have acceptable packet loss ratio (< 0.5 %), otherwise it becomes very high (> 50 % is ...
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1answer
41 views

Redirect traffic to another machine

I have 3 machines - A, B and C. Can I redirect all Http/Https traffic originating from B and C through A such that the third-party views the the incoming request as sent from A rather than B or C?
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55 views

wget not working but apt-get does

Although this question relates to Raspbian running on my Raspberry Pi, it feels like it is a more general Linux query.... The Pi is sat on a network which includes a Microsoft TMG server. I have ...
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2answers
44 views

Can't browse Internet in Redhat 7

I installed RHEL 7 using server with GUI with no added option on my local virtualbox, but I cannot get Firefox connected to the Internet. I checked /etc/resolv.conf contains nameserver setting I ...
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1answer
62 views

Assigning static public IPs to Proxmox KVM guests

I'm currently using 5 public IPV4 addresses on a physical machine running Ubuntu Server, which I intend to replace with new hardware running Proxmox. I'll do a P2V of the current Ubuntu install into ...
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1answer
50 views

How to fix or bypass the DHCP handshake to get an IP address

My linux box can't seem to get a DHCPOFFER from my router. This is blocking me from getting internet access on the linux box. Here's the setup: I have two computers, a linux box called mocha and a ...
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0answers
20 views

wifi-menu leads to freezes in Arch

I have a Macbook Pro 5,1 that I recently installed Arch on. Today, I had problems with my wifi, so I reinstalled the broadcom drivers, and was able to get wifi-menu working, but this has led my ...
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1answer
85 views

Java Client Connection Refused by Linux Server

I have a Java server and client, which is a simple server that prints a message when the client communicates with it. It works perfectly fine when the client and server are on the same machine. When I ...
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0answers
37 views

ping on linux vs ping on mikrotik

I have ubuntu server 14.04, with two network cards (LAN and WAN). I made a masquerate for WAN card. I have internet access from a host within the Lan of router. I do a ping to 8.8.8.8 and try to ...
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42 views

Resolving NETBIOS names from Linux

There's a Windows machine called SUSAN on my network. From a Windows VM on my Linux box I can simply: C:\>ping susan I've followed this guide (and looked at several other similar ones) for ...
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1answer
30 views

Monitoring network connectivity in Busybox/embedded Linux

I have an embedded Linux/Busybox system that needs to monitor its own network connectivity. I'm trying to figure out if the device is "all alone" on the network for more than say 10 minutes, and take ...
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1answer
67 views

Using connman, how can I set resolv.conf options when connman keeps overring the file?

I want to set the single-request option in resolv.conf but connman keeps overriding the file. I see some things can be set in /var/lib/connman/*/settings, but seemingly not this.
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195 views

vpn l2tp connection on ubuntu 14.10

I am using Ubuntu 14.10 and I need to create a VPN L2TP connection. I installed strongswan, as suggested by this answer, but now I don't understand how to configure the connection. The connection ...
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1answer
78 views

RHEL7: Why does 'nmcli conn show' & 'ip addr show' display different connections?

My 'nmcli conn show' & /'etc/sysconfig/network-scripts' config files don't match up, showing just one connection/devices of each: [root@ciroc network-scripts]# ls |grep ifcfg ifcfg-enp0s3 ...
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2answers
64 views

Can I prevent a default route being added when bringing up an interface?

I have a system with two NICs on it. This machine, and a few accompanying devices will be moved and attached to different LANs or sometimes it'll be using dial-up. eth0: - 10.x.x.x address space - ...
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1answer
52 views

Cannot use ALFA-AWUS036NHA over my laptops wireless card

I recently bought an ALFA-AWUS03NHA Wireless Card, I am running Debian and I want to use the card with the aircrack-ng suite of tools. However, I am pretty sure it is using my laptops wireless card, ...
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15 views

Change Netatalk server name

Is there a way to change the name of a Netatalk AFP server, as shown by the client? I run Netatalk3 on FreeBSD 10.1 with OS X clients. On the clients I see the server labeled with its hostname. I ...
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29 views

How was dnsmasq answering DNS queries before I fixed /etc/network/interfaces?

I installed dnsmasq to provide both DHCP and DNS on my home network. Everything was working swimmingly until just now. Seemingly out of the blue I was unable to connect to the internet on any ...
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1answer
34 views

Linux Virtual Network Interface: Specify a Specific DHCP Server (or DHCP Server in an Address Range)?

I'm setting up a Linux box for a friend. She lives way out from the city and has to use dial up, but sometimes she can bring the computer into town and connect on my LAN or on someone else's LAN. ...
2
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1answer
28 views

How to report receive queue size for AF_UNIX sockets

netstat -a reports Recv-Q (amount of unread data pending for a reading application) for AF_INET sockets, but not AF_UNIX sockets (at least not for SOCK_DGRAM). Does anybody know a way to obtain this ...
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3answers
87 views

How do I troubleshoot networking on Debian

Today I restarted my linux box, and following the restart, my linux box has no network connection. Here's what I've tried so far: Use an different ethernet cable that works on my other computer. No ...
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2answers
52 views

Forwarding a Localhost:Port to an ExternalIP:NewPort

We have got an application running on our linux server. From that application, when we try and access localhost(127.0.0.1):localport, it should be forwarded to an external IP. Users will only try and ...
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1answer
49 views

Provide security settings before connecting over WiFi in Mint 17

A little while ago I upgraded my laptop from Linux Mint 16 to 17. Everything went fine, but now I can no longer connect to a specific wireless network that I have at work. When I try to connect, it ...
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1answer
30 views

GRE not Forwarding origin IP

I've followed the BuyVM Guide found here on creating a GRE Tunnel to protect my main server against DDOS attacks (http://wiki.buyvm.net/doku.php/gre_tunnel) I've followed through this whole guide ...
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1answer
68 views

KVM Disk Image File Path openSUSE

I need to enable networking for my guest KVM Windows 10 VM under openSUSE Tumbleweed host. I need the default file path for the virtual disk image as per here. Running the following command: ...
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0answers
33 views

How do I measure the amount of network traffic that passed my debian installation?

So my raspberry pi is acting as a Router and Web/Mail/FTP/SQL/Media/Clash of Clans/Home server right now and I'm looking for a way to monitor the consumed bandwidth, much like NetWorx for windows. I ...
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1answer
80 views

Route everything through VPN except SSH on Port 22

I have a Server and I want to setup a VPN on it to route all traffic. Of course I dont want to block myself out when establishing the OpenVPN connection (already did that..) so I want the Port 22 to ...
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48 views

connman connections extremely flaky and slow

I'm trying to configure my system to be able to connect via either ethernet or wifi with connman. I was able to hotplug my ethernet with systemctl restart dhcpcd.service previously, but I'd like to ...