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  • About cdn architecture to route way

    - by Tony Lee
    Our web system, use the third-party cdn service. Assume that the user set the local dns with the googledns or opendns to visit our web sites, so cdn service will select the closest cdn proxy node. all right, but in fact the user's actual access position might outside there, cdn service may chose the one furthest away from the user node, so static resource access slower.. At present, my idea is if user local set dns server with googledns, and then first one we get the actual ip address of the user, tracerote to test a best routing lines, set up a cookie in user browser, and then set 302 header for response to jump to the which best cdn node. Whether the user's browser side traceroute tool can provide the best route decision-making ? Because we find that, once the user to set local dns server with the foreign network segment, for example : set dns with 8.8.8.8, so cdn routing will choose the foreign service node.

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  • How to set system-wide proxy address using shell script?

    - by skg
    I want to set system Proxy address through my Qt application. So i was wondering if i could write a script which can be executed by my application every time to change the proxy address. I tried : #! /bin/sh echo "# Generated by Application" export $1 echo "Proxy Address ${1} but this script was not successful. I think it was unable to execute "export" command. Can anyone help me resolving this issue ?

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  • Unable to remove network proxy

    - by Rushil
    I'm on 11.10 I'd set up a network proxy a couple of days back from system settings .And afterwards I'd set my proxy method back to none. However, my proxy has not been removed. I know this because: a: 127.0.0.1 routes me to the index.html file in the base directory of the proxy server. b: I'm able to access my university internet after hours. I checked my /etc/environment and etc/apt/apt.conf file and both of them have no proxy details. I also tried resetting the proxy and then getting rid of it but that didn't work either.

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  • Static IP breaks Network connection

    - by Pasquale Tedesco
    I am somewhat new to Linux. I am setting up a Web server and installed Ubuntu server 14.04 on an vSphere ESXi 5.5 host. I am connecting perfectly fine to the internet when using DHCP but when I apply my Static settings I loose the ability to connect to websites. Whats weird is I can Ping google.com but if I try wget gooogl.com it hangs at connecting to google.com (google.com):173.194.43.32:80 and I get "failed: connection refused" But if I am set to DHCP the connection resolves perfectly. Thanks # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 #iface eth0 inet dhcp iface eth0 inet static address 10.1.2.25 gateway 10.1.2.2 netmask 255.255.255.0 search tsig.com dns-nameservers 10.1.2.13 10.1.2.30

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  • Ethernet Wired Connection Help

    - by user107598
    I have recently installed Ubuntu 12.10 onto my Dell Inspiron N5010 and Ive been all over many forums trying to figure out how I can get my ethernet cable to be recognized so I can set up a wired connection. My Network Card is the Realtek RT8139 and from what Ive gathered the ethernet port driver for it is installed. Whenever I run ifconfig in the terminal it says that eth1 is up and running but no matter how I edit the connection I cannot get it to work. If anyone can help it would be greatly appreciated!

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  • How can an application (like Firefox) be forced to use a certain network interface?

    - by Lekensteyn
    I've two interfaces: eth0 and wlan0 on a notebook. Possible use cases: eth0 grants me Internet access, and wlan0 is currently connected to a router which does not have Internet-connectivity. For development purposes, I need to connect to the wlan0 by default, but use eth0 for surfing eth0 and wlan0 are both connected to the Internet. For a torrent application, eth0 should be used for speed, but for portability of the notebook, SSH should have a connection over wlan0 eth0 is a wire connection, wlan0 is a wireless one. Sensible data should be transferred over eth0, but other traffic can go over wlan0 as well. Is there a way to force applications (like nc.traditional or firefox) to use a certain network interface? A wrapper like example-wrapper eth0 program is fine too if such program exist. It would be nice if it could configured within Firefox (in runtime). I'd like to avoid IPTables solutions if possible.

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  • Connection to openVPN Access Server

    - by Beig
    we are using an openVPN Access Server and I would like to connect to it via the VPN network setting (network-manager-openvpn). I downloaded the client.ovpn and I can connect to the server via the command line: openvpn --script-security 2 --config client.ovpn How can I add the connection to the network manager? Which (key) entry is which? User Cert, CA Cert, Private Key? Here is an example of the client.ovpn http://nopaste.info/c10ec207f2.html Thanks in advance.

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  • upgrade from 11.10 to 12.04 killed my network connectivity

    - by Daniel
    I have a wired network connection that worked fine in version 11.10. I upgraded to 12.04 and immediately after the upgrade was completed, the OS reported my "cable unplugged". It is not unplugged and it is not defective. I have a D-link DFE-530TXS 10/100 ethernet NIC and I see what seems to be the generic 10050 driver loaded. Is there any way to just flush anything and everything to do with the network configuration and have Ubuntu reset/find everything again? If not...is there any way I can get it to realize that my network cable is not unplugged? (considering it worked mere minutes before). Thanks.

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  • How do I set up a server for SSH?

    - by Rob S.
    At my workplace (a university) we have two Ubuntu servers. One is a teacher server and the other is a student server. I am currently setting up a new server to replace the existing teacher server. The new server is currently online and I am trying to get it setup so I can SSH into it from my home. Right now, I can SSH into the existing teacher or student server and then SSH into the new server. However, I can not SSH directly into the new server. What must I do so that I can SSH directly into the new server? Thank you very much in advance for your time.

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  • How to setup a wifi ap hotspot with ipv6 support?

    - by keyman
    How to setup a wifi ap (access point mode) hotspot, with IPv6 support? I've set up a hotspot according to the guide to wifi ap hotspot setup and it works fine. But via the hotspot I failed to visit IPv6 websites. How can I setup a hotspot able to share Ipv6 Internet access? Thanks! Further: Actually I've tried to setup IPv6 forwarding and masquerading. First enabling IPv6 forwarding: echo 1 | sudo tee net/ipv6/conf/default/forwarding Then I tried to execute: sudo ip6tables -t nat -A POSTROUTING -s 2001:db8:0:1::/64 -o eth0 -j MASQUERADE But it gave me an error: ip6tables v1.4.12: Couldn't load target `MASQUERADE':No such file or directory I searched through the Internet but I get confused. So I'm here for help. Thanks!

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  • How to set up router with DSL?

    - by NightwishFan
    I have a Verizon DSL connection. I am new to being the one who has to maintain the net. We have the Verizon modem and plugged into it is a belkin router. I did not alter the configuration on either of the devices. We get a net connection, though I have issues joining any form of online game. Some refuse to connect, others are slow. I have read that perhaps I need to use the modem in "bridge mode" to the wireless router? Would that fix my issues? Or do I just have to open ports or something similar. I really have no clue what could be the problem. Could someone advice me how to get this working with Ubuntu?

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  • atheros ar8161 not recognized

    - by Paul
    Apparently I am not the only one with this problem. This was my solution, but it did not work, of course. I downloaded the tar from another computer. I found the file of the atheros driver that I needed which is apparently atl1c. I put that file on my ubuntu desktop. I ran the following in the terminal: cd ~/Desktop atl1c make sudo make install I am sure that some of you will find this code laughable, but isn't there a simple code I could use once I have the atl1c folder on the desktop?

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  • Disabling IPv6 on a single interface

    - by ijw
    I'm slightly weirded out by the fact that Ubuntu won't process ipv4 DHCP unless you explicitly tell it to, but will happily take ipv6 RAs unless you tell it not to. Is there any way to change the default behaviour to be 'do nothing unless I explicitly turn it on'? (Note to answerers: I'm not looking to globally disable ipv6, or completely turn off autoconf. I'm looking to disable autoconf by default (as in, I don't want ipv6 unless I say so in /etc/network/interfaces, in the same way that I don't just get a v4 address unless I've explicitly turned on dhcp). What's happening is that, for any interface that's up - e.g. has an ipv4 config - a v6 address tends to just turn up on the interface as well, despite the fact that I've not enabled that explicitly. The solutions to date are fine as far as they go, but if I disable v6 or autoconf globally, I can't then re-enable v6 on a per-interface basis with a simple command in /etc/network/interfaces. I'm fairly sure I'm asking for the moon on a stick, mind you.)

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  • How to make ip Address static (eth0)

    - by Jordan Angelucci
    I'm having a really hard time configuring ubuntu 13.04 to have a static ip address. I have tried multiple solutions but everytime I reboot (can't do the network reset command because ubuntu freezes) I end up with no connection. Here is what I get when i type ifconfig into the terminal: eth0 Link encap:Ethernet HWaddr 10:bf:48:bc:07:cb inet addr:192.168.0.8 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::12bf:48ff:febc:7cb/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1763067 errors:0 dropped:0 overruns:0 frame:0 TX packets:1024326 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2284491220 (2.2 GB) TX bytes:136809317 (136.8 MB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:1840 errors:0 dropped:0 overruns:0 frame:0 TX packets:1840 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:185688 (185.6 KB) TX bytes:185688 (185.6 KB) I have also tried this: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.0.160 netmask 255.255.255.0 broadcast 192.168.0.255 gateway 192.168.0.1 dns-nameservers 24.222.0.94 dns-nameservers 24.222.0.95 If anyone could help me it would be very much appreciated.

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  • svn-based versioning tool, problem with network timeout

    - by Scarlet
    My dev team was committed a versioning tool based on Subversion to run on Windows (our svn client is sliksvn). We're developing with Delphi XE2, should that matter. We're asked to implement a "check for updates availability" feature, which has to work as follows: Connect to the SVN repo via svn+ssh protocol; See if there are changes to receive and list them; Let the user decide if he wants to receive changes or not. We don't have a great knowledge on svn, so we thought to implement that thing client side by a certain number of CreateProcess calls that wrap directly proper svn commands. Anyways what we perceived is that if network problems should arise, such like a connection drop, svn client hangs forever waiting for the operation to close instead of failing for timeout. We know that CreateProcess can be given a timeout argument, but it wouldn't be correct to use it, as we can't know from outside how long will be the svn operation taking to complete. Is there any way to avoid that deadlock?

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  • Network configuration problem with ubuntu

    - by Musti
    I am a new Ubuntu user. In my dorm there is a bit strange connection way for internet, I have to configure given "IP address, Subnetmask, Default gateway, Preferred DNS server, and Alternate DNS server" to have an internet connection, otherwise it is imposible. Actually it is very easy in windows, I am just opening Network and Sharing Center and then setting up TCP/IPv4. I had some attempt in Ubuntu, but just failed :/ Can anyone tell me how to configure? Thanks in advance... Musti

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  • Ubuntu Server 12.04 as a router. Problem with DNS?? Or Routing table?

    - by Lorenzo
    I have a virtualbox lab made up of 4 Windows 2008 R2 servers (DC/DNS,SQL,SHAREPOINT, EXCHANGE) that are configured with static ip addresses with NIC's attached to Internal network. Everything works. I had the requirement to execute some tests that also access external services available on the internet. To keep things clean and similar to the production environment I have installed another VM, with Ubuntu Server 12.04 64 bit and configured (I hope) to work as a router like described on this post. This VM has two network interfaces: first is Bridged with the host and is used as a WAN connection and the other one attached in the Internal Network with its own static IP address on the internal network subnet. But actually the Windows servers does not connect to the internet while the unix one connects. I did a route command. this is the result: Kernel IP Routing table Destination Gateway Genmask Flags Metric Ref Use Iface default 10.69.121.1 0.0.0.0 UG 100 0 0 eth0 10.69.121.0 * 255.255.255.0 U 0 0 0 eth0 192.168.83.0 * 255.255.255.0 U 0 0 0 eth1 Can somebody help me with this configuration? :) Thanks! Addendum: I forgot to mention that one of the windows server hosts a DNS service for which I should maybe configure a forwarding server but I do not exactly know which server to forward on... :(

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  • Scuttlebutt Reconciliation from "Efficient Reconciliation and Flow Control for Anti-Entropy Protocols"

    - by Maus
    This question might be more suited to math.stackexchange.com, but here goes: Their Version Reconciliation takes two parts-- first the exchange of digests, and then an exchange of updates. I'll first paraphrase the paper's description of each step. To exchange digests, two peers send one another a set of pairs-- (peer, max_version) for each peer in the network, and then each one responds with a set of deltas. The deltas look like: (peer, key, value, version), for all tuples for which peer's state maps the key to the given value and version, and the version number is greater than the maximum version number peer has seen. This seems to require that each node remember the state of each other node, and the highest version number and ID each node has seen. Question Why must we iterate through all peers to exchange information between p and q?

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  • Connection timed out when connecting to a website (ubuntu only)

    - by S.C.
    I've been struggling with these problem for months. It happens randomly and it happens on Ubuntu only (12.04). It's about my hosted company website. Some facts: I can ping it I can traceroute it I can dig it I can make a nslookup But whenever I try to open it in Chrome it won't open. I also tried using polipo but got same connection time out issue. I'm connected through a LAN network and I'm experiencing no problem with any other website. Is there a more accurate debugging technique I'm missing other than pinging/tracerouting, etc.?

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  • Syncing properties across a game server

    - by Vaughan Hilts
    I'm beginning to implement a simple scripting system into my networked server, and I've hit a snag. Before, I've been wrapping my calls into functions on objects that manipulate objects, but lately I've been finding this to be a pain for simple things. For example, if I set 'player.HP = 1'.. this works server-side. But the player side never sees this change unless I explicitly send a packet to inform the client. For many things like map swapping that require more complicated changes, like change X, Y, Map and do this.. I have a function. That's fine. But what about these small properties I want to sync?

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  • Printing Problem on Shared Printer

    - by paulus_almighty
    I'm using Ubuntu 11.10 on two machines. One has a USB printer connected. I want to share this printer with the other over the wireless network. Under Printing > Server > Settings: I have Publish shared printers connected to this system and Allow printing from the internet enabled. All other checkboxes are disabled. When I right click on the printer icon, I can see enabled and shared are ticked. On my other machine, I can now click on add network printer. It finds the machine name of the server and correctly identifies the printer. However, print test page fails. Under printer properties the printer state says: Processing - Unable to connect to printer; will retry in 30 seconds... What's gone wrong?

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  • Start & Stop internet connexion without broking Network Manager

    - by user3634569
    I am on Precise. I used this command (with an alias), to close the network, dbus-send --system --print-reply --reply-timeout=120000 --type=method_call --dest=org.freedesktop.NetworkManager /org/freedesktop/NetworkManager org.freedesktop.NetworkManager stop it worked, now I have to use dbus-send --system --print-reply --reply-timeout=120000 --type=method_call --dest=org.freedesktop.NetworkManager /org/freedesktop/NetworkManager org.freedesktop.NetworkManager.Sleep boolean:true it work but not so well, sometimes I can't restart the network and NetworkManager is blocked too and strange errors even GUI freeze . What I need is a command line which close the network and don't mess with Network Manager, maybe with the routing table or what else.

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  • Is the TCP protocol good enough for real-time multiplayer games?

    - by kevin42
    Back in the day, TCP connections over dialup/ISDN/slow broadband resulted in choppy, laggy games because a single dropped packet resulted in a resync. That meant a lot of game developers had to implement their own reliability layer on top of UDP, or they used UDP for messages that could be dropped or received out of order, and used a parallel TCP connection for information that must be reliable. Given the average user has faster network connections now, can a real time game such as an FPS give good performance over a TCP connection?

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  • How to establish VPN Connection using Vodafone K3773 HSPA USB Stick?

    - by user1889139
    I am using Ubuntu 12.04 Desktop. I am trying to establish VPN PPTP connection to Ubuntu 12.04 Server. VPN connection available when PC is connected to LAN - ADSL modem - Internet - VPN Server. No VPN connection available when using 3G modem Vodafone K3773 HSPA USB Stick - Internet - VPN Server. Internet is connected. VPN is not. How to establish the VPN Connection? Server side log: GRE: Bad checksum from pppd.

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  • Bluetooth broadcasting realtime - is it possible

    - by user69961
    Is it possible to broadcast data via bluetooth to one ore more connected devices? I mean that each phone will be master and slave at the same time and each phone will broadcast data that should be received by all other phones. Or is the only possibility to use a "client-server"-like topology; one phone acts as a server and listens to all clients and then sends data from each client to the rest of clients in the network? Which variant should be more effective? If broadcasting is possible then the same implementation can be used for all devices and if one device will die communication between rest of network can continue. And also will there be enough to send one message per device - not message from each device to server and then back to all devices. Am I right?

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