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  • Solution for file store needing large number of simultaneous connections

    - by Tennyson H
    So I'm fairly new to large-scale architectures. We're currently using linode instances for our project, but we're brainstorming about scaling. We need a file store system than can deliver ~50mb folders (user data) to our computing instances in a reasonable amount of time (<20 sec), and scale to 10000+ total users, and perhaps 100+ simultaneous transfers. We are also unsure whether to network mount (sshfs/nfs) or just do a full transfer store-instance at the beginning and rsync instance- store at the end. I've experimented with SSH-FS between our little Linode instances but it seems to be bottlenecked at 15mb/s total bandwith, which wouldn't do under 10+ transfer stress let alone scale v. large. I also tried to investigate NFS but couldn't get it working but have little hope that it'll do within our linode network. Are there tools on other cloud providers that match our needs? Should we be mounting, or should we be transferring? Thanks very much!

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  • Internet Pings but Does Not Load

    - by t3techcom18
    From what I've been seeing and been doing my research for the past two days, many people have been having the same issues throughout the years, however, this is the first time I've encountered this issue and many of the specific workarounds or fixes have not worked for me. I've been trying to work through this for 24 hours straight now, but to no avail so many thanks to those that can help. On Monday night, got home from work; surfing the internet for half an hour, everything was fine as always. Just after half an hour, my Internet got very sluggish and then it died completely. I thought it might have been the an update I just put through in terms of Windows Update that said was a critical update for MSE, as the same thing happened a few years ago. I did a System Restore to two different dates that were in the past two weeks, nothing. Uninstalled MSE and disabled Windows Defender and the Windows Firewall: Nothing. Reset IE Options, Reset Winsock, Dumping DNS, many of the other command prompt screens to reset items: Nothing. Reset the modem: Nothing. What DID work, however, was a ping test to Yahoo. The ping test worked, saying all four packets was recieved, yet nothing else popped up. LAN and CenturyLink said everything worked on their end and that everything was connected properly, as well as the speeds working fine. CenturyLink said in their notes that they thought Port 80 was blocked. I went and put in the Firewall to allow Port 80 but it didn't make any difference whatsoever. I remembered I had a spare modem laying around and I switched them up, both modem and the cords - nothing. I then hooked it up to my netbook to see if that would work, as it usually does - connection didn't work there either. Like I said, it's been about 24 hours now and this is increasingly frustrating, as I've tried all solutions (While browsing through 10 search results pages on my phone) suggested and still nothing. Any suggestions and tricks would be greatly appreciated! Here's my specs: Windows 7 32-bit Home Premium Intel Core 2 Duo 3.14 Ghz 4 GB Kingston DDR2 RAM eVGA nForce 750i SLI eVGA GeForce GTX 560 Ti FPB ISP: CenturyLink No router Modem: CenturyLink 660 Series Hardwired connection PLEASE NOTE: This is the only computer I have (Like I said, the netbook solution didn't work), so downloading programs and such is not an option til I get to other computers somewhere else, like right now. Unless someone knows of a way of copying/pasting a file in Windows and then transferring said info to an Android smartphone, this is gunna take a while haha. Patience is requested.

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  • Virtualbox share guest (windows xp) printer to host(linux)

    - by M0E-lnx
    I have a weird situation. I own a printer that has 0 support in linux, but of course, it works in windows. So I have installed VirtualBox 3.1.2 with guest additions to provide access to my usb devices. I have successfully setup the printer and the guest os can print fine. Now, the question is: Is there any way to make this printer accessible to the host OS? I noticed that the guest OS takes an ip address of 10.0.2.15, but when I try to ping that address from the linux host, it goes nowhere. No response. Has anyone here done this before? can anyone think of a way to do this?

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  • Lost network on ubuntu server

    - by user1838473
    I have a virtual machine on Vsphere 5.0 running Ubuntu 12.04 when i put dinamic IP (/etc/network/interfaces) iface eth0 inet dhcp Ubuntu have network and i can do ping to google for example (8.8.8.8) but when i put static IP and configure resolv.conf My interfaces file: auto eth0 iface eth0 inet static address 192.168.1.54 gateway 192.168.1.1 netmask 255.255.255.0 it lost the network and i cant do ping to anything...i dont understand where is the problem... Thanks a lot

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  • how to throttle http requests on a linux machine?

    - by hooraygradschool
    EDIT: here is the summery: i need to reduce max connections preferably system wide on Ubuntu 11.04 but at least within Google Chrome. i do not need or want to throttle bandwidth, Verizon seems to only care about the number of connections so that is all i want to change. also, i don't want to use firefox unless i have to, i have three other machines all using chrome and synced and i just prefer it over firefox. i use tethering for my home internet connection via my verizon cell phone. without paying for it. this works just fine for streaming netflix via my nintendo wii and pretty much every other conceivable use ive had for it. except, during heavy usage with multiple tabs open on my laptop, the network connection on my phone will just turn off, then on again, then off, but it never fully connects. i think, based on this and other questions that this is caused by verizon getting too many http requests from my phone. is there some software, script, setting or otherwise that would allow me to throttle my requests to say, 5 or 10 or whatever it turns out is 1 less than verizon is looking for, so that my cell's network connection is not lost? i would far prefer a slow down rather than complete shut off of my internet connection. i am almost certain is from quantity of requests and not related to data, because, as i mentioned, netflix will run all day without a hitch, and that uses more data than anything else i would be doing. if i had a router i am pretty sure there are settings i could easily change to only allow so many requests at a time ... but in this case, my phone is my router, so no settings. im using ubuntu 11.04 on my netbook with an htc incredible on verizon (not that the phone details are relevant) i have been trying to figure this out for quite some time, currently the only fix is ensure that all requests are stopped and then sometimes it works again, other times i have to manually turn my 3g service off and then back on. thank you so much for any assistance!

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  • ftp-client works fine. ftp-tls-client fails on one computer and works on another

    - by ispiro
    Connecting to ftp - from a Windows Server 2012 - it works both secure (-over tls) and unsecure. From a Windows 7 it succeeds unsecure but fails when secure. (Using explicit TLS and passive mode.) filezilla: 234 AUTH command ok. Expecting TLS Negotiation. Initializing TLS... Connection timed out I've tried many things but nothing helps. (I'm also trying this programmatically. For details see: http://stackoverflow.com/questions/25393716/ftp-ssl-fails-after-expecting-tls-negotiation ) The fact that it does succeed from one computer proves that the ftp server is fine. And the fact that the Windows 7 computer succeeds without tls proves that it's not a NAT/firewall problem (besides, it failed even after disabling firewall etc.). I'm not sure where to start looking. Perhaps a difference between PC Windows and Windows Server? EDIT The ftp server is on a Windows Server 2012.

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  • Ethernet/8P8C crimp contacts bent

    - by Fire Lancer
    (if anyone knows correct terminology please correct). Ive got a (fairly large) number of existing Ethernet cables that over the years many have got damaged connector clips, so got a crimp tool and some new connectors for them. However out of all 4 attempts I have tried, on crimping 2+ of the little copper contacts that bite into the wires have instead just bent to one side, and so gone between the gaps in in the crimp tool... Unless this really is me doing something wrong (what?) I am inclined to blame the hardware, but is this the crimper or the new connectors I got? I tried to take a picture, as you can just about see looking from the left 3rd, 6th, 7th and 8th pins didn't get pushed in, and so don't form a connector. Unfortunately my camera was barely able to focus on it and then this website converted it to a JPEG... Update: Connectors/Cable/Tools: The wires are stranded (looks about 6 and no evidence of being aluminum/not copper), and the pins(?) have 2 little flat spikes lengthways along the cables (I understand to dig into it, while solid core connectors would have like 2 plates designed to go around the core?). Crimper was http://www.amazon.co.uk/gp/product/B0013EXTKK/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1 (seemed to be highly rated, I already had tools for cutting/stripping). Update2: Picture of crimp "prongs" (?) Update3: Side picture of connector Update4: Comparison with old connector. The top (used) connector is one from a few years back (different tool and connectors), the thing that concerns me that it might not be the tool I need to replace is just how thin the pins are on the new one that maybe a tool could legitimately bend some into a gap rather than pushing them in fully? In fact I can move individual pins to the sides significantly with my fingernail, is that normal?

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  • Large OSX 10.6 to Windows 7 smb transfers fail?

    - by user41724
    I'm connecting to a windows 7 box from a OSX 10.6 box via smb: smb://ftp1 Connection works fine, I can transfer individual files one at a time, but as soon as I try and move an entier folder I get the following error: The Finder can’t complete the operation because some data in “test” can’t be read or written. (Error code -36) This error happens on all our OSX boxes when trying to push the entier folder to the Win7 box. The folder TEST in the above error message has -R 777 permissions. I can move every image file to the windows box one by one with no errors. But if I try an move the entier folder. bam error out. This error seems to kill the smb client on the Windows box as well. There's an FTP server on the windows box and I can FTP in from the OSX box and move everything just fine. Not sure what is going on here?

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  • How can 2 or more instances of the same program to communicate in local network?

    - by user1981437
    I want to create program which will be in use for few computers connected in local network. Basically the program aim is to keep track of all tables in a bar ( lets say ), which are reserved. When some user book a table as reserved the program should broadcast the table number to all other Pc's and mark the table as reserved. Since all computers use the same program, how is possible to create communication between all of them ? Should i use sockets to achieve this? If it matters, all of the computers have installed Linux OS,and the app will be developed in ruby,perl or php. Thank you.

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  • Can you explain how to understand what the 'iwconfig' command displays in Ubuntu-9.04?

    - by Shawn
    I'm having trouble making my wireless connection work, and I realized I don't really know how to use the tools I have, in this case, the iwconfig command in Ubuntu-9.04. Here is what I get: ***iwconfig*** - lo no wireless extensions. eth0 no wireless extensions. wmaster0 no wireless extensions. wlan0 IEEE 802.11bgn ESSID:"Network" Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated Tx-Power=20 dBm Retry min limit:7 RTS thr:off Fragment thr=2352 B Power Management:off Link Quality:0 Signal level:0 Noise level:0 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 vboxnet0 no wireless extensions. pan0 no wireless extensions. "Network" is the name of my wireless network, btw. But what does this all mean? How can this information help me aquire a working wireless connection? When I try associating a key using sudo iwconfig wlan0 key s:my_key I get the following error message: Error for wireless request "Set Encode" (8B2A) : SET failed on device wlan0 ; Invalid argument. I do have the right key though, so what's the problem?

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  • Configuring two subnets with two NICS. Access from a NAS to the internet

    - by archipestre
    I am having trouble configuring my NAS. I have a DSL router with WIFI (192.168.1.1) in my flatmates room. In my room I have a server with two NICS: 1) wlan0 (192.168.1.2) that connects to the DSL router via wireless 2) em1 (192.168.0.1) that connects to the NAS (192.168.0.20) with a crossover cable. I have Fedora 17 and I have enable packet forwarding. My IP configuration is as follows: WLAN0 inet 192.168.0.1 netmask 255.255.255.0 broadcast 192.168.0.255 EM1 inet 192.168.1.2 netmask 255.255.255.0 broadcast 192.168.1.255 My routing table looks like: Destination Gateway G enmask Flags Metric Ref Use Iface 0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 wlan0 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 em1 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 wlan0 I have enable a static route in the DSL server: Status Network Destination Subnet Mask Interface Gateway Remove Edit Active 192.168.0.0 255.255.255.0 LAN 192.168.1.2 From my server I can ping the DSL router and the NAS. From the NAS I can ping both NICS of the server. However the NAS is unable to ping the DSL router or any address in the Internet. Any idea of what is wrong. Thank you in advance

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  • having public computers without joining the domain

    - by MCarter
    Good Morning, I would like to know what is the best arrangement for setting up 24 computers at a facility. We do not want these computers to join our domain because of security concerns. We plan on having these public computers connect to our wifi network. If anyone knows of the best way to approach this, that would be great! We also need to add printers to these public computers. We would also like to lock each computer down. Since we are not connecting by network, I assume we would have to configure each group policy.

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  • Private subnet for VM server host-only network

    - by Derek Pressnall
    At my current job, we distribute a product based on a Linux server with multiple VMs defined (using KVM / libvirt). We are planning to expose limited ports to the customer's network, and use iptables to direct inbound traffic to the appropriate internal VM. My question: is there a class of private subnets that I can use for the internal host-only network that is least likely to conflict with a client IP subnet? Specifically, if I choose a /24 out of any of the RFC-1918 defined private subnets (such as 192.168.x.x), there is a chance of conflicting with a customer-used range. I noticed that several current VM implementations default to 192.168.122.x -- is this due to an RFC that I'm not familiar with, and therefore this is a safe range to use (that most network admins would avoid)? Or did the various VM vendors just pick that range randomly? I guess I'm looking for an IP range that is more private than the existing private (RFC1918) addresses. The only other thought I had was to use one of the "Test Net" IP ranges reserved for documentation purposes (RFC 5737). Note, that I'm not worried about a customer's network blocking these IPs, as this is only internal to our server (packets get NATted before leaving the box). However this does seem more unorthodox than just sticking with the default 192.168.122.x/24 subnet.

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  • Mount network drive

    - by user971155
    I'm using linux(ubuntu), there's a linux(fedora) server, that I can log in with ssh, is there any possibility //server/dir /mnt/my_mount_dir cifs username=loginpassword=11111,uid=1000,iocharset=utf8,codepage=unicode,unicode 0 0 As far as I'm concerned, this construction uses SMB as primary tool. Is there any possibility to use NFS or any another approach, because in case of SMB it tends to have permission, symlink collisions. PS It would be great if you also provide some links. Thanks.

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  • is it possible to set up a wireless bridge with dd-wrt?

    - by user398314
    I have a standard router (dlink) and a secondary linksys running wrt. Currently i have it set up according to this guide. (using the Instruction for dd-wrt v24 sp1 settings) It works great however it seems as though i can only connect via the actually ports in the router meaning it has to be hard wired. Is it possible to set it up so that I can connect to the secondary router and still use it as a bridge? Seems like it doesn't work as a wireless AP anymore when its running in bridged mode.

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  • Juniper Network Connect (VPN) on Windows 7

    - by Virat Kadaru
    My company uses Juniper networks for vpn access. I am unable to get the juniper network connect client to work on windows 7 64-bit. It used to work before but after I formatted my system it gives the following error every time I start the vpn client If I check the logs I see this error The Juniper Network Connect Service service is marked as an interactive service. However, the system is configured to not allow interactive services. This service may not function properly.

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  • How to allow all traffic from 1 IP address Windows Firewall

    - by Foo_Chow
    I am trying to give another PC completely unrestricted access to my machine. They are both on the same subnet. What I am looking for is effectively disabling the firewall entirely for one IP address. Example Host: 192.168.1.2 Client: 192.168.1.3 Firewall "off" World: xxx.xxx.xxx.xxx Firewall "on" To be specific I am running "Easy"PHP as a testing server for websites and want to access them from other machines on my network. After tinkering I figure the method suggested in my question would be best to make things actually easy. PS. I have already tried opening all ports both inbound and outbound to that IP with no results. My only current success has been actually turning the whole firewall off.

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  • How does communication between 2 computers in a single network happen?

    - by learner
    Lets say I and my friend connect our computers with a LAN cable. I ping my friend with his IP address. How does it work? Since we are in the same network, we don't even need IP addresses, do we? Isn't IP addressing only relevant in case of inter-network communication? What will the ping command do with his IP address? How will it eventually find his physical address (NIC address)? (no ARP here, because that would involve a router at the edge of the network, which doesn't apply here). Am I wrong somewhere?

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  • Not able to access the server after changing the password? [closed]

    - by cyrilsebastian
    While accessing the server, the error comes: Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed. Disconnect all previous connections to the server or shared resource and try again. I am logging in from Administrator in XP machine, able to access server from other machines. Is there any problem with administrator profile??

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  • Port forwarding stopped working in my Linksys WRT54G2 Linksys router.

    - by user23490
    How to do it again? I had simply forwarded needed ports (e.g. for counter strike, ftp, http etc)) but now with same system, same OS and same router and settings, it's not working. Tried setting router to "factory defaults" and do everything again. However other jobs are being done like it is connecting to my DSL ISP and I can access Internet easily. Still no success. PS. I tried on both Windows and Ubuntu. On Windows I use it for Counter Strike and others (e.g. host my local FTP server) on Ubuntu.

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  • Internet keeps connecting and disconnecting

    - by OmerPT
    I have a PC running 32bit Windows 7 Professional. My wireless internet card is Edimax EW-7128G, it is inside my computer case and it is connected to an antenna. My problem is: I have a wireless connection to my router, the signal is fine and it's not slow or anything, but it just keeps disconnecting every 30 seconds or so, then connects back, then it disconnects, then connects back and so on. This is new - it only started about a week ago, everything worked just fine until then. I know it's not a problem with the router because: Other computers can connect to it easily and they work just fine, no disconnections (My phone too). I know it's not a problem with the computer or the wireless card itself because: I have Ubuntu installed side-by-side with my Windows, and when I switch to Ubuntu the internet works great. This caused me to think it's probably a problem with the wireless card drivers installed on windows (Ubuntu auto-installed them, I installed them manually on windows): I tried uninstalling them, and then installing them back again, sadly that didn't help. I'm kind of lost here - can anyone think of anything else I should try? Thanks :)

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  • My raspberry pi server hostname doesn't work?

    - by xSpartanCx
    The people over on the rPi forums don't have any answers for me... I've got a raspberry pi running raspbian server edition. My problem is that the only way I can ssh into it with putty is through the static ip. My router doesn't recognize the hostname; it shows the mac address as the name. This causes the pi not to show my apache2 website online (I think). The only way I've gotten it to work is using my other linux server to forward using virtual hosts, and that has to use the ip address, too. However, now that I have my other server off, the website doesn't work.

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