Managing and using network connectivity on a unix system

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Network tool to monitor IP packet fragmentation

Is there a tool, similar to iptraf, that would let me see how many incoming/outgoing IP packets get fragmented/defragmented, and what percent of traffic they are? I know this can be counted with the ...
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56 views

Unable To Bridge Two Teamed Interfaces - Advice?

Before the wall of code I'll explain the situation. I'm trying to set up two interfaces to be teamed together, and from that team create a bridge. I've been studying for the RHCE and I believe this ...
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50 views

IP packets fragment randomly

I've observed the strangest thing - the same packet, same size, send through the same interface sometimes gets send whole, and sometimes gets fragmented, as if it exceeded the interface MTU... 1472 ...
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1answer
34k views

How to connect to Internet in Kali Linux after changing IP address manually?

I have a problem in my Kali Linux. I cannot connect to the Internet after changing my IP address using this command: ifconfig eth0 198.168.198.130 netmask 255.255.255.0 up After this, when I open ...
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1answer
462 views

Mumble doesn't bind to network address on boot, needs to be restarted (doesn't properly wait for network?)

I have a default, unchanged installation of the Mumble server on Debian Squeeze (package "mumble-server"). On a previous setup, starting the server (called murmurd) on boot using the default init ...
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1answer
3k 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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1answer
8 views

Virtual eth-adapter in networking-configuration

I have on my Debian en eth0-interface and I need the interface to listen to other IP's. I know I can create it with the following command ifconfig eth0:1 10.10.10.20/24 With this command everything ...
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1answer
33 views

Is Super server (inted / xinetd/… ) comes with Ubuntu default?

Few days back I learn about super server in networking. Then I looked for /etc/inetd.conf and /etc/xinetd.d and found neither of them in Ubuntu. Note: I know only these two types of super server ...
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1answer
56 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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2answers
543 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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1answer
88 views

Weird authentication with Exchange server

I'm using Evolution with evolution-mapi to access an Exchange e-mail server. It has worked flawlessly in the past, but recently it will fail to authenticate, asking my password endlessly. If I enter ...
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2answers
1k views

Suggestions needed for udev, udisks, autofs, notification setup for a complete automounting solution on Linux

Continuing on Automounting plugged devices in linux, which left things a bit basic. Running Gentoo, I'm automounting a combination of local and network devices on my laptop with autofs-5.0.4-r5. Doing ...
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2answers
6k 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 ...
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1answer
59 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
55 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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1answer
110 views

Dump network traffic of single application (strace-like)

I'm looking for a way to dump pcap of network data generated by an application, in a simmilar way strace dumps syscalls, etc. eg: net-strace somecommand -args somecommand would do something over ...
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1answer
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
1k views

Static IP address shifting to 192.168.1.251

I have a system with a static IP address of 192.168.1.150. I configured /etc/network/interfaces manually (i.e. without using NetworkManager.) It is a web server hosting three sites. I am having ...
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1answer
31 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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29 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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2answers
984 views

NAT and source IP filtering in PF, using OpenBSD >= 4.7

I just read a book about PF (The Book Of PF, No Starch), but there's one question not answered by it. If I have a gateway machine using two interfaces, $int_if and $ext_if, and I NAT the packages ...
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0answers
67 views

[Solved]No problem connected by filezilla, but cannot get list when connected by linux CLI client

I built FTP server by VSFTPD, on Raspberry pi, and Inside NAT. Surely set port-forwarding and, it perfectly functional when I connected by filezilla. But, I can't execute LIST(dir) when I connected ...
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23 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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2answers
523 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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1answer
64 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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4answers
128 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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3answers
86 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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1answer
93 views

Debian Jessie: My LAN is not working!

I can connect to the Internet without a problem by using wireless networks. I have a DSL connection on defined which can connect to the Internet when LAN is connected. When I plug-in network cable, ...
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0answers
21 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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2answers
42 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
77 views

How can I switch between “wl” and “b43” wifi modules without rebooting?

If I restart my computer with the following in /etc/modprobe.d/blacklist.conf: blacklist b43 blacklist ssb blacklist wl Then I can either modprobe wl (broadcom STA, works well) or modprobe b43 ...
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1answer
29 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
67 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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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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89 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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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
37 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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2answers
643 views

Realtek drivers prevent detection of eth1 interface?

Here's the situation: I had a working network setup on my Debian box, with two Ethernet interfaces being reported by ifconfig - eth0, and eth1. eth0 is an onboard Realtek NIC, and eth1 is a D-Link ...
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5answers
16k views

On-the-fly monitoring HTTP requests on a network interface?

For debugging purposes I want to monitor the http requests on a network interface. Using a naive tcpdump command line I get too much low-level information and the information I need is not very ...
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1answer
44 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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3answers
104 views

How to make Raspberry Pi to receive an IP from a router and also pass another IP to another device?

I know that I could achieve the desired result with an Ethernet switch, but I'm curious if I can get this with some cheaper solution. The idea is as follows: Rapsberry Pi has two Ethernet ports - ...
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1answer
41 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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2answers
387 views

Why is ping much faster when using -f

I'm pinging the same host from the same machine at the same time. And when using -f, the result is almost twice as good: [root@localhost Desktop]# ping 196.1.6.16 PING 196.1.6.16 (196.1.6.16) 56(84) ...
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0answers
132 views

Raspbian: how ifplugd works on lo and other interface

On my raspbian, I'm wondering why ifplugd (link detection daemon for ethernet devices) is also running on the lo the loopback interface. The ps command displays: /usr/sbin/ifplugd -i lo -q -f -u0 ...
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1answer
130 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
143 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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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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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
38 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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2answers
529 views

Fedora 20 dosen't accept correct PIN for mobile broadband

I have a problem with the WWAN (Qualcomm Gobi 2000) in my Lenovo ThinkPad W510. I can not unlock my SIM card with the correct PIN. I enter the PIN in this dialog and after this I get immediately ...