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• Homegroup libraries visible but can't be opened

  - by majocha

  I have 2 Windows 7 PCs in a home network. When I create a homegroup, the libraries I share are visible on the opposing machine but when I doubleclick them nothing happens - no error message, nothing at all. It is the same on both computers. The homegroup works to the extent that the printer I shared is visible and can print from the other computer. Only the libraries are inaccessible. What I tried and checked so far, without result: disabling firewall file and printer sharing, MS Networks client enabled in network properties deleting and recreating homegroup reset homegroup by deleting C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\PeerNetworking unsharing and sharing again the libraries

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• Right solution for /etc/hosts file reset on reboot

  - by user846226

  i've just installed funtoo and after setting the FQDN on /etc/conf.d/hostname i noticed when setting a list of aliases in /etc/hosts file it get overwtiten on each reboot. Someone points to set the aliases to 127.0.0.2 ip address but that's not a valid solution for me. Could someone point me to the file where i should place entries like 127.0.0.1 local.foo 127.0.0.1 local.bar in order to make them persist in /etc/hosts after rebooting? Thanks! PD: I think openresolv could be the one who is overwritting the file.

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• Why does my computer not always automatically request a new DHCP lease when switching networks?

  - by KingJ

  I've noticed an interesting problem recently where my laptop will not automatically refresh my DHCP lease when changing between wireless networks. Instead, it will attempt to use the existing lease for the new network. Of course, since each network has different settings any connections will fail when using the old lease. While Windows will eventually request a new DHCP lease, it's often much faster for me to release the old lease and request a new, correct, lease. It puzzles me as to why this is not automatically done when associating to the network? One possible cause is that the laptop is put to sleep while connected to one network, then woken when in range of the other network. Nevertheless, I would expect that the lease would be renewed when the laptop associates to the other network rather than attempting to use the old lease. It should be noted that the two networks are completely different, both in terms of size, number of APs, network settings, SSIDs etc. One network is my home network and the other one is the campus-wide network at my University.

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• Multiple wifi cards and Internet connections on Win-7

  - by Dpp

  Hello, I have two wifi cards and two separated internet connections. I connect to the Internet with both of them but one does all of the internet transactions (and I have not seen any place where I can specify which one I would prefer to use!) What I would like to do is use one of them for the browser and skype only, and the other one for stock exchange software for instance. Any idea if it is possible?

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• Identify Deprecated Rules on Checkpoint Firewall

  - by Basa

  I've been asked to find the deprecated rules among the thousands of rules in our Checkpoint firewall. I could do it by writing a perl program to analyze the log and lists of objects & rules, but i wanted to know if anybody knows of an easier way before reinventing the wheel. I have access to SmartView Monitor et SmartView Tracker and i wanted to know if anybody knew of a way to achieve my goal with those tools.

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• How can I optimize my ajax calls to deliver at 60ms.

  - by Quintin Par

  I am building an autocomplete functionality for my site and the Google instant results are my benchmark. When I look at Google, the 50-60 ms response time baffle me. They look insane. In comparison here’s how mine looks like. To give you an idea my results are cached on the load balancer and served from a machine that has httpd slowstart and initcwnd fixed. My site is also behind cloudflare From a server side perspective I don’t think I can do anything more. Can someone help me take this 500 ms response time to 60ms? What more should I be doing to achieve Google level performance? Edit: People, you seemed to be angry that I did a comparison to Google and the question is very generic. Sorry about that. To rephrase: How can I bring down response time from 500 ms to 60 ms provided my server response time is just a fraction of ms. Assume the results are served from Nginx - Varnish with a cache hit. Here are some answers I would like to answer myself assume the response sizes remained more or less the same. Ensure results are http compressed Ensure SPDY if you are on https Ensure you have initcwnd set to 10 and disable slow start on linux machines. Etc. I don’t think I’ll end up with 60 ms at Google level but your collective expertise can help easily shave off a 100 ms and that’s a big win.

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• Dealing with employees that use Hotspots? [closed]

  - by javasocute

  Recently a consultant revealed to me and my superiors that a particular department in my company had a tremendous decline in productivity over the past year. This department happened to mostly work with laptops and tablets and thus had wireless. Our barracuda did not display any vast amounts of internet entertainment and so I was initially puzzled by his statement. However he explained that more and more employees are using "hotspots" that when not broadcasted, become invisible to our network. So basically these people could connect to hotspots and watch youtube all day and we would never know it. The consultant also said that this was becoming an issue for many companies. So my question is, how can I detect invisible hotspots? I was browsing google and there are several different programs that can scan for such access points. But I am hoping to get a recommendation from the serverfault community. Thank you.

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• RV042 - how to broadcast UDP through VPN

  - by user47221

  I setup a gateway to gateway vpn connection with linksys RV042 router. i was able to ping each other, access file sharing ( with netbios enabled ). They are having same subnet mask 255.255.255.0, 192.168.1.0 <--- 192.168.2.0 Firewall disabled. But when i created/host LAN games (eg. warcraft3), it cannot be detect by clients at another site/LAN. As i know warcraft3 is using UDP broadcast to tell the client the game is creaetd. 1. How to broadcast UDP to another LAN ? any things to do with multicast ?

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• trying to set up wireless router, failing

  - by j j

  Hi, I am trying to set up Netgear's wireless-n WNR2000 router, following their oversimplified 5- step process for plugging in wires, and I'm not having any success. It comes down to: once everything is wired and turned on in the correct order, all of the LEDs match the image they give of 'what should be lit up', but their setup disk still doesn't find the router. They have a site to set up the router manually, www.routerlogin.net, which I cannot navigate to, even while wired directly to the router. http://192.168.1.1 doesn't connect to anything, either. The interesting part: i get ping replies from Google's DNS server at 8.8.8.8 while this is set up. but cannot connect to any web site by name, since the router's DNS isn't set up. One thought is that the router and modem both have the same IP address, so it's conflicting, but I'm not sure how I'd resolve that. Any ideas?

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• Why some software can control the speed of the computers in Lan?

  - by Foolish

  I found some software can control the speed of the computers in lan, it seems that they use something like arp attack, can someone tell me the theory of this ? Anyone heard of P2P over software ? how it works ?

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• WAN and LAN setup for IPv6

  - by neu242

  We just got a IPv6 /48 range (a gateway and an IP address) for our company, but I'm unsure about how to set it up. We use FreeBSD 8.4 (pfSense 2.1) as a router/firewall. Currently we have IPv4 setup with a WAN towards the internet, and a NAT-ed LAN behind it for office PCs. We want to keep the LAN network for security, and we want IPv6 addresses from the /48 for all office PCs (without NAT). The WAN is configured with the IPv6 gateway 1111:2222:3333::1/48 and interface address 1111:2222:3333::2/48. But when it's configured this way, I guess it's impossible to fit the LAN on a /64 within the /48? I believe I should configure the WAN subnet on 1111:2222:3333:1::/64 and the LAN on a subnet like 1111:2222:3333:2::/64. Is this something I can configure myself, or do I have to ask the ISP to configure that routing for me?

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• Cisco VoIP stuck as Unregistered?

  - by Shifty

  Question: Why is one VoIP stuck as Unregistered? Background: We have a Cisco UC540 Small Business switch/router/voip combo. This phone was working until I powered everything down to install a larger UPS unit. The phone originally had a status of "Deceased". I removed the registration and tried to add it again. Now it just sits as "Unregistered". I even tried giving it another extension. I am stuck using the Cisco Communication Assistant since this is small business hardware. There is very limited CLI access. Also, from what I heard, if you access the CLI with out cisco permission, you will void any warranty. The phone in question is a Cisco SPA501G. It is connected to a SG300-28P. There are 5 other phones on this switch working just fine. I have tried other ports with no luck. Both the link and PoE lights are lit up. Any ideas?

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• If the WiFi switched on, should it disable the ethernet? [closed]

  - by Peter Stuart

  My friend having problems with her laptop and I am trying to help her via SMS. She can't get her laptop connected to the internet via the Ethernet connection and there is no WiFi in the area. Could it be because her WiFi is switch on, she is using an acer aspire. If she manually switches it off could that allow the ethernet connecttion to work? Or is it a missing driver? The cable works fine as her someone else tried it. Thanks Peter

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• Can't access YouTube

  - by Agentleader1

  I can not seem to connect to YouTube at all. If I connect directly to YouTube (youtube.com) I get this: And if I try to connect via video directly (youtube.com/watch?v=), I get this: Here's how this isn't a web issue: I have malware on my computer I believe. And the question here is, how do I get rid of it, or what possible issue could this be? I can verify this is not a website issue or wifi issue, I've tried to connect on another computer in my wifi, and it worked. It is the local machine issue. I've tried to get rid of malware at my best and also have tried to disable possible virus extensions. All can out as the same result: no help. Also, I am unable to find these hiding viruses. I used malware-bytes and Microsoft Security Essentials. Edit: This is OBVIOUSLY Windows. I am currently running on a laptop Windows 7 Home Premium 4gb ram 64-bit os Lifebook series manufactured by Fujitsu America, Inc. Intel(R) Core(TM) i3-3110M CPU @ 2.40GHz nslookup youtube.com:

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• Windows 7 - Static DHCP server address with dynamic IP Address

  - by mkstreet

  Is this possible? On my LAN, I would like to setup the network properties such that the DHCP server's address is static. However, I want that server to hand out the IP Addresses and DNS addresses dynamically. The reason is that some devices on the LAN will try to behave like a DHCP server. For example, we use software to push images to computers on the LAN (our computer software configurations are centrally managed). When that imaging distribution software happens to be running, the machines being imaged will get confused as to which device is the DHCP -- the real one or the machine that is sending them the image. So, to remove the confusion, I would like to setup my Windows 7 images such that the DHCP server address is statically assigned. And then that server would assign the IP Addresses and the DNS addresses dynamically.

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• Internet really slow or stops working on my computer but fine on my laptop and ipad

  - by Fr0zen1

  I know you are going to say that this has been answered already, but it hasnt. None of those solutions worked for me. So this is the problem, and it only occurs on my computer, my laptop,ipad and iphone are just fine. When I`m browsing the net, it laods webpages slow(my speed is 30mb down and 3mb up) and when I start downloading with a another application(steam, utorrent), my browser completely stops working, but the application thats downloading(steam, utorrent) continues to download with a fast spead(2-3mb/s) and I do not know why. I have this issue on all browsers. I have tried chrome, internet explorer and firefox. I have restored my windows but still the same issue and I also have kubuntu installed and it also has the same issue. I do not know why. Any help? Thank you

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• Computer freezes, wireless network icon disappears

  - by Heidi

  As you can see I have two problems. I have a Toshiba Tecra A3 computer. It is 5-6 years old and it is connected to a D-link router. For a period now it has not been working correctly. The computer freezes either when i try turning it on or when I have been using the computer for a short period of time. The times the computer works normally I have a problem with a disappearing wireless network icon, and so I have no internet. Can this be fixed or do I have to buy a new computer? I only use the computer for internet surfing and easy tasks like word etc, so I would like to keep it as long as possible.

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• What happens when a load balancer fails?

  - by CowKingDeluxe

  Let's say I'm using Amazon's EC2 load balancer. I have it hooked up to two instances (excuse me if my terminology isn't correct). What happens if the load balancer fails? Do both instances fail to work now?

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• Windows 7 keeps asking for WIFI credentials

  - by RubenGeert

  If I want to log onto our WIFI network, Windows keeps asking for credentials. After many connection attempts (and sometimes some reboots) we finally manage to connect. Then the connection usually stays intact for the rest of the day. But it sometimes takes 15-20 minutes before we're online... Needless to say we're using a single username/password for all failing/succeeding attempts. Does anybody recognize these symptoms? How to troubleshoot this?

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• How to setup IP alias on bridged interface in Ubuntu

  - by Anonymouslemming

  How do I setup an IP alias on a bridge (br0) device on Ubuntu ? If I wait for br0 to come up and then do /sbin/ifconfig br0:0 192.168.10.1 netmask 255.255.255.0 then it works fine. If however I add the following to my /etc/network/interfaces file, it does not work and the network fails to start: auto br0:0 iface br0:0 inet static address 192.168.10.1 netmask 255.255.255.0 At the moment, I have a script in /etc/network/if-up.d/bridge_alias that does this as follows: #!/bin/bash if [ "${LOGICAL}" == "br0" ] && [ "${PHASE}" = "post-up" ]; then echo -n "Starting br0:0 ... " /sbin/ifconfig br0:0 192.168.10.2 netmask 255.255.255.0 echo "Done!" fi What is the right way of doing this though, just using the OS network config files ?

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• Uploading to YouTube makes all browser tabs and devices disconnect

  - by fabsenet

  Whenever I upload a video to YouTube all other browser tabs behave like there is no connection at all. It even affects my phone and other computers on the network therefor I think it has to do with my router. When the upload is done everything works normally again. I never observed this behavior with any other upload. My router is a Fritz!Box 7390 and my uploading PC is connected through a 1000mb/s switch (wired) to the router. Uploading through another browser does not change anything. I understand that other sites become slow as the network resources are limited, but stopping altogether feels wrong. speed.io measures for my internet connection: 40.894 Kbit/s down, 2.685 Kbit/s up, 29 ms ping, 2.048 con/m connects

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• How to discover which name/address connections from one network to another uses?

  - by Jader Dias

  In MySQL you have to authorized a user based on the name of the origin network. From my network to a remote one all connections appear as sent from mail.mycompany.com. But connections to another remote network it appears with a different origin. How to discover which name/ip it is using? I tried tcpdump and netstat in the destination but it is difficult to find my connection among billions of others. In my case the destination is a Windows Server 2003

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• Share Only 1 folder using SMB

  - by SnippetSpace

  I want to share my "My Videos" folder using Windows's built in SMB. The problem is that when I decide to share my video folder and check it on another device, the path always is: networkname>username>my videos instead of just my videos I noticed that indeed sharing gets turned on from the user folder down to the video folder instead of just on the folder I selected. So now my question is why this is happening; And how cold I just display my "my Videos" folder on my remote device and not the entire path? BTW device in question is a hacked Apple TV. thank you for your help! Christopher

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• How do I install Skype on computer so that anyone who logs in does NOT have to go through the initial config?

  - by Matt

  I installed Skype when logged on to the (local) admin account. Now, when I log off that, and log on as myname on the domain, I have to click through the intial setup steps (after you've already run the installer) of Skype. So, I have to click next to get through the mic setup/test, and it asks me if I want to take a pic. How do I get it so that any person who logs in can just open Skype and go straight to the login screen? Windows 7 64 bit, 2008R2

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• arp across subnets which devices can be detected?

  - by Gobliins

  i have some devices connected in the same physical network (LAN) but in different subnets. I want to detect them all with the ARP from my computer. My Computer is also in the same physical network but on a different subnet. ! The devices have no arp protocol installed (yet). Is it possible to detect the devices (with or withour ARP installed on every device)? If the devices have a MAC-address but no IP-address, can ARP still detect the machines?

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