Tagged Questions

0
votes
1answer
20 views

slow sftp, starts fast, stalls after 10 sec

On a 32 bit Ubuntu machine (12.04), I have a speed problem transfering files (~100MB) with sftp (command-line), from my machine to a server, on a ethernet 100Mb/s network. The transfer starts at ...
0
votes
0answers
8 views

Route dns+dhcp requests through iptables?

I have a Raspberry Pi which I'm attempting to use as a range extender for my home wifi network. I've installed and setup hostapd with the same settings as my router, so that any devices will select ...
0
votes
0answers
9 views

How can I add a FQDN to a Centos VM running on VirtualBox?

I would like to add a fully qualified domain name to my Centos 6 VM that is running on virtualbox. The virtualbox is set to be in bridged mode. I'm a windows programmer, and I am as far as they get ...
0
votes
3answers
24 views

my perl scripts that use Net:Pcap dont work when i port them onto a vm on my server

I am trying to run a perl script that i have scripted to dump the packets from my network, i am using the Net:Pcap and netpacket modules. They are working fine on my and my friend's laptop. but when ...
1
vote
0answers
20 views

Ubuntu - Internet isnt working nor popping up

I am COMPLETELY new to Ubuntu, like literally, I only know a few commands and stuff for terminal.. I recently installed it into my laptop to learn it more but for some odd reason my wifi wont pick up, ...
1
vote
1answer
20 views

Windows 7 doesn't see my wifi network after restarting the wireless modem (freebox)

I have a 'freebox' internet connection (France) and from time to time I have to restart the modem (the 'box'). It is a recommended procedure. My problem is that while my old computer running Xubuntu ...
1
vote
1answer
19 views

Linux alternative to route add on windows

When I'm connected to my windows dedicated server and connect to a vpn server I would get disconnected from the dedicated server since its ip address would change. I found a way to overcome this by ...
0
votes
0answers
5 views

Fast path and Slow path in OpenFlow and Open vSwitch: which object are they related to (OVS or OF)?

I read some materials on Open vSwitch (OVS) which is implemented with OpenFlow (OF). One thing I cannot understand is the meaning of Fast path and Slow path? Which object are they related to (OVS or ...
0
votes
0answers
11 views

Wicd set up on centos

I am having difficulties with wicd on start up on CentOS 6. When it starts up it complains that it cannot connect to the DBus and that the daemon has shut down. When I check the log file there is ...
0
votes
0answers
19 views

local routing with openvpn : ping: sendmsg: Operation not permitted

I set up a simple vpn with IP 10.0.0.1 using openvpn --mktun --dev tun1 ip link set tun1 up ip addr add 10.0.0.2/24 dev tun1 and I run a simpletun program on two machines which is ...
0
votes
0answers
10 views

How can I restrict (open)VPN access to one of multiple users on a single ubuntu system?

I'm connecting to a vpn as the "work" user on my ubuntu laptop. When I switch to my "not work" user on the same system, it is still networking through the VPN. I'd like it to network through the ...
0
votes
0answers
23 views

packet loss and unable to ssh

I am trying to connect to a linux server from my linux machine using SSH over LAN. I don't know what the problem is but sometimes I can ping the server but can not ssh whereas at other times I am ...
1
vote
1answer
52 views

Can I pipe/redirect a console application through netcat so it can be used remotely?

Is it possible to 'pipe' an instance of a console application through netcat, so netcat is listening for a new connection and redirects the stdin and stdout over the network connection.
0
votes
1answer
17 views

Automatic remount cifs/SMB after short network interruption

A Windowsserver provides a network directory called data via CIFS/SMB protocol. The data folder is mounted on a Linux client with password and user authentification. Sometimes the drive gets ...
0
votes
2answers
48 views

How to force linux to use one network connection over the other?

I have connected my iPhone which has hotspot enabled to my ubuntu machine through the USB. Based on the type of network activity (say browsing vs ssh), I want to switch between network connections ...
0
votes
1answer
26 views

Split tunnel routing a specific port over OpenVPN on Ubuntu Server 12.04

So I know there is another question on here that I used as a guide as it was super helpful! (Setup routing and iptables for new VPN connection to redirect **only** ports 80 and 443) Only my goal is a ...
2
votes
1answer
46 views

ssh: connect to host port 22: Connection refused with external ip address

ssh: connect to host XXX.XXX.XXX.XX port 22: Connection refused This happens when i try to connect with external ip (WAN IP Address). I am successfully able to connect using internal ip address ...
0
votes
1answer
16 views

Connecting to openvpn server from linux command line

I'm trying to setup openvpn client on Debian Linux so my traffic goes through he vpn. I have done a lot of Googling and in all the articles I crossed it mentions that I need to copy the certificate ...
1
vote
0answers
36 views

Debian security: lots of connections on port 80

I have a debian server (kernel: 2.6.32-5-amd64). I normally run a jetty server on it, but lately it started getting tons of connections to it. It shouldn't get all this traffic, since its a pretty ...
1
vote
1answer
14 views

Cant ping Vbox guest from host but can ping it from other devices on network?

Host OS: Fedora 17 with Virtual Box with IP 10.51.49.6 Guest OS: CentOS 6.3 with IP 10.51.49.13 Guest networking mode is set to Bridged to eth0 on Host but what I cannot do is connect from Host to ...
0
votes
1answer
28 views

discover first unused static ip address

I need to dynamically discover the first unused IP address on 192.168.0.0/24. This is in a small network with a single switch, no host running any dns or dhcp services. Basically every host self ...
3
votes
2answers
136 views

CIFS mount issue over IPsec VPN

I'm trying to connect a client running Ubuntu 13.04 to a network share hosted by a file server which has recently been upgraded from Windows Server 2003 to 2012. Currently I am able to mount the ...
0
votes
0answers
24 views

How to force-detect network devices with Network Manager under Linux

I usually get connected to internet with a mobile broadband connection, provided by my Nokia 5800 phone linked to my computer with its USB cable. I'm using Network Manager (on Kubuntu 12.04 with KDE ...
2
votes
1answer
71 views

Raspberry Pi VPN with 3g dongle for internet access

I'm trying to set up a VPN connection on my RPi, but always times out. I have a DDNS setup and the public IP address is updated using ddclient. I have a network machine connected to eth0 and a 3g ...
0
votes
0answers
18 views

vnc connection through ssh tunnel and public keys authentication

I am trying to vnc connect from A to B through ssh tunnel via C. I cannot connect directly from A to B via ssh. A and C connect through ssh with password authentication. C and B connect through ssh ...
0
votes
0answers
28 views

openvpn interface, local routing and linux kernel routing table

from this article： http://backreference.org/2010/03/26/tuntap-interface-tutorial/ the author created a tun interface # openvpn --mktun --dev tun2 # ip link set tun2 up # ip addr add 10.0.0.1/24 dev ...
0
votes
1answer
53 views

CentOS 6.4 server no internet connection

I just installed CentOS 6.4 on my server. I've tried running sudo yum update and got the output Could not retrieve mirrorlist...snip...error was 14: PYCURL ERROR 6 - "Couldn't resolve host ...
0
votes
0answers
28 views

Redirect traffic from 80 to 8080 using iptables

I have two interfaces eth0 and eth1. Traffic is copied (reflected) from another machine to my eth0 so that I can analyse it. On eth1, my analysing software listening port 8080 is installed. I want to ...
0
votes
2answers
39 views

Copy file from my local machine to itself using network

Is it possible to send a file from my local computer to my local computer through the network? (Linux prefered) It must use the network because my goal is to check the transfer speed. I don't use two ...
1
vote
0answers
31 views

Can't connect Wi-Fi on Linux Mint 14

I have got Linux Mint 14 and everything worked fine until today. Today I installed and configured a new router I bought recently, then I tried to connect it. I clicked on the router name in the list ...
0
votes
1answer
35 views

How can I run a command at successful ethernet connect in Arch?

I have a Raspberry Pi running ArchARM, and would like to make a reverse SSH tunnel as soon as it connects to the network via ethernet. I made an executable (+x) shell script in /usr/bin, and would ...
0
votes
0answers
23 views

Iptables: Filter broadcasted UDP packets on specific interface

My PC has two network interfaces (eth0 & usb0) that are bridged. There is a service on my PC that broadcasts UDP packets on a specific port (7000). I would like to prevent these UDP packets from ...
0
votes
2answers
30 views

Some problems setting the HTTP Proxy on my Ubuntu

I am a Linux Ubuntu user and I have some problem setting the proxy on my entire system. I go into the network settings of my Gnome and then I go to the Network Proxy settings mask and then I put my ...
0
votes
3answers
33 views

how to use netstat on a specific port in Linux

Guys i want to know if my specific port is running a server using netstat? how do i achieve that?
0
votes
2answers
35 views

tcpdump error: no suitable device found in Linux

Guys im trying to test a tcpdump to google.com (im new to Linux by the way). so here's what i typed in my shell: $tcpdump src 192.168.1.xxx and dst www.google.com and port ftp but i get this ...
1
vote
0answers
20 views

Change UDP port with iptables for VPN clients

What I want to do is say that for all UDP connections on interface ppp0 that have a destination port of 53, change that destination port to 1053. I am attempting to change the destination port of UDP ...
15
votes
3answers
427 views

How do I physically find a wifi device using a laptop or mobile phone

Okay, so I have lost my tablet somewhere in my flat and have been searching for hours already. It is an Android device, which seems to have wifi enabled (responds to pings), but doesn't seem to react ...
1
vote
2answers
49 views

Two networks, one local, one internet

I am doing some development on a raspberry pi, running arch linux on both the pi and my desktop. After having horrible connection problems with using just wireless (I live in an apartment complex ...
0
votes
2answers
48 views

Cannot get SSH to run on Ubuntu Server

I am very new to linux and literally just started using it last weekend. I am playing around with getting a server up and running and I am trying to get SSH to run on my machine. I installed ...
1
vote
1answer
28 views

Expose VPN connection on network

connect to my work network from my home desktop through a VPN connection. What I am trying to achieve is expose this connection on to my mobile (Android) which connects to internet through 3G ...
1
vote
2answers
54 views

Route/NAT/Port forwarding for one port only?

I'm not sure what is the correct term to use and I don't know what tools should I use. The only thing I have is a goal which I'd like to accomplish. I have two linux machines(A and B) and a remote ...
0
votes
0answers
25 views

How to set up IPSEC on Linux using low-level tools like setkey?

Suppose I have a host and VM connected using virtual network. I done: host# ip -6 addr fc::1/120 dev eth0 host# ip link set eth0 up vm# ip -6 addr fc::2/120 dev eth0 vm# ip link set eth0 up How to ...
0
votes
2answers
35 views

Persistent DHCP Reservation Timing Out

I have 2 machine inside my home LAN (Netgear WNR2000v2 wifi). One of them is a laptop ("client machine") that will always be assigned random IPs in the 192.168.1.1 through 192.168.1.50 range. The ...
0
votes
1answer
23 views

Dummy interface in an LXC guest

I am trying to create a split-horizon PPTP setup as described on my website within an LXC container. However, I need a dummy interface within the container to put the DHCP server on. Here comes the ...
-1
votes
2answers
50 views

how to add entry to local DNS resolver [closed]

I want to do some tests on linux. I want to put a small web server on a machine with IP: 1.2.3.4 (assumption) and when a DNS query is made for a specific URL : kitty.myweb.com I want to return this IP ...
0
votes
3answers
72 views

Ping Ubuntu by hostname in a Windows machine

I installed Ubuntu 12.04 on a Virtual Machine (Virtualbox). The network adapter is attached using bridged adapter. I can ping the guest OS by IP but I can't ping it via hostname. I already installed ...
0
votes
0answers
24 views

DNS address not acquired by ubuntu

I have a lenovo G430 machine with ubuntu 12.04 running on it. The Network configuration is DHCP, It gets the IP but fails to get the DNS and henceforth wont be able to browse internet.The issue is ...
-5
votes
0answers
37 views

Can't connect to internet on Linux after installing Windows 8 [closed]

I just installed Windows 8 on my new SSD but since then I can't connect to internet from OpenSUSE 12.3. I've had issues with my grub after installing windows 8 so I had to reinstall the grub. I am now ...
0
votes
1answer
30 views

Linux network audit

I have a server with Linux Red-hat Enterprise Edition 5.4 installed. and a client/server application that permits connection at the port 6000, but it doesn't offer connections log. I want to know ...
-1
votes
0answers
32 views

Can anyone explain how the loopback interface works? [duplicate]

I got to understand how TUN/TAP works from the following illustration: TUN/TAP illustration I'm at a loss how the loopback interface works. Can anyone explain a bit about how the loopback interface ...

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