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  • Configuring network entirely VMware Workstation

    - by MRB
    Hello everyone! You could help me how to configure a network entirely virtual with VMWare Workstation 6.5 which has the Windows Server 2003 and XP workstations, but all virtual server and workstation windows xp.Outra thing is through my Windows Server 2003 I will release Internet access for Windows workstations xp.Everyone I'd like to simulate at home as if in a company but everything virtual. My host is a Windows XP thanks!

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  • network sharing problem

    - by Sanket Pethe
    hi i m sanket, pls help me to connectivity on windows 7. I have 4 pc ,one dlink 8 port switch. with cablenet. I can not able to all 4 pc in network with sharing with all. i have windows 7 licence copy on my all 4 pc's. Then pls help me to find. Regards, Sanket.

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  • Network throughput issue (ARP-related)

    - by Joel Coel
    The small college where I work is having some very strange network issues. I'm looking for any advice or ideas here. We were fine over the summer, but the trouble began few days after students returned to campus in force for the fall term. Symptoms The main symptom is that internet access will work, but it's very slow... often to the point of timeouts. As an example, a typical result from Speedtest.net will return .4Mbps download, but allow 3 to 8 Mbps upload speed. Lesser symptoms may include severely limited performance transferring data to and from our file server, or even in some cases the inability to log in to the computer (cannot reach the domain controller). The issue crosses multiple vlans, and has effected devices on nearly every vlan we operate. The issue does not impact all machines on the network. An unaffected machine will typically see at least 11Mbps download from speedtest.net, and perhaps much more depending on larger campus traffic patterns at the time. There is one variation on the larger issue. We have one vlan where users were unable to log into nearly all of the machines at all. IT staff would log in using a local administrator account (or in some cases cached credentials), and from there a release/renew or pinging the gateway would allow the machine to work... for a while. Complicating this issue is that this vlan covers our computer labs, which use software called Deep Freeze to completely reset the hard drives after a reboot. It could just the same issue manifesting differently because of stale data on machines that have not permanently altered low-level info for weeks. We were able to solve this, however, by creating a new vlan and moving the labs over to the new vlan wholesale. Instigations Eventually we noticed that the effected machines all had recent dhcp leases. We can predict when a machine will become "slow" by watching when a dhcp lease comes up for renewal. We played with setting the lease time very short for a test vlan, but all that did was remove our ability to predict when the machine would become slow. Machines with static IPs have pretty much always worked normally. Manually releasing/renewing an address will never cause a machine to become slow. In fact, in some cases this process has fixed a machine in that state. Most of the time, though, it doesn't help. We also noticed that mobile machines like laptops are likely to become slow when they cross to new vlans. Wireless on campus is divided up into "zones", where each zone maps to a small set of buildings. Moving to a new building can place you in a zone, thereby causing you to get a new address. A machine resuming from sleep mode is also very likely to be slow. Mitigations Sometimes, but not always, clearing the arp cache on an effected machine will allow it to work normally again. As already mentioned, releasing/renewing a local machine's IP address can fix that machine, but it's not guaranteed. Pinging the default gateway can also sometimes help with a slow machine. What seems to help most to mitigate the issue is clearing the arp cache on our core layer-3 switch. This switch is used for our dhcp system as the default gateway on all vlans, and it handles inter-vlan routing. The model is a 3Com 4900SX. To try to mitigate the issue, we have the cache timeout set on the switch all the way down to the lowest possible time, but it hasn't helped. I also put together a script that runs every few minutes to automatically connect to the switch and reset the cache. Unfortunately, this does not always work, and can even cause some machines to end up in the slow state for a short time (though these seem to correct themselves after a few minutes). We currently have a scheduled job that runs every 10 minutes to force the core switch to clear it's ARP cache, but this is far from perfect or desirable. Reproduction We now have a test machine that we can force into the slow state at will. It is connected to a switch with ports set up for each of our vlans. We make the machine slow by connecting to different vlans, and after a new connection or two it will be slow. It's also worth noting in this section that this has happened before at the start of prior terms, but in the past the problem has gone away on it's own after a few days. It solved itself before we had a chance to do much diagnostic work... hence why we've allowed it to drag so long into the term this time 'round; the expectation was this would be a short-lived situation. Other Factors It's worth mentioning that we have had about half a dozen switches just outright fail over the last year. These are mainly 2003/2004-era 3Coms (mostly 4200's) that were all put in at about the same time. They should still be covered under warranty, buy HP has made getting service somewhat difficult. Mostly in power supplies that have failed, but in a couple cases we have used a power supply from a switch with a failed mainboard to bring a switch with a failed power supply back to life. We do have UPS devices on all but three of four switches now, but that was not the case when I started two and a half years ago. Severe budget constraints (we were on the Dept. of Ed's financially challenged institutions list a couple years back) have forced me to look to the likes of Netgear and TrendNet for replacements, but so far these low-end models seem to be holding their own. It's also worth mentioning that the big change on our network this summer was migrating from a single cross-campus wireless SSID to the zoned approach mentioned earlier. I don't think this is the source of the issue, as like I've said: we've seen this before. However, it's possible this is exacerbating the issue, and may be much of the reason it's been so hard to isolate. Diagnosis At first it seemed clear to us, given the timing and persistent nature of the problem, that the source of the issue was an infected (or malicious) student machine doing ARP cache poisoning. However, repeated attempts to isolate the source have failed. Those attempts include numerous wireshark packet traces, and even taking entire buildings offline for brief periods. We have not been able even to find a smoking gun bad ARP entry. My current best guess is an overloaded or failing core switch, but I'm not sure on how to test for this, and the cost of replacing it blindly is steep. Again, any ideas appreciated.

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  • Network Switch fast eneogh for Dlink DIR-655

    - by Recursion
    I am setting up a server and want to keep it outside of my local network which is inside of the Dlink 655 router. I originally bought the dlink router mainly because it is fast, much faster than any other consumer router I have tried. The only router which is capable of real 10MB/s d download speed. I need a switch which will not cause a bottle neck to the router. The switch will connect the to the server and the dlink router.

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  • Can not copy files from Windows 2003 server over network

    - by Mark
    It seemed quite strange. I have a share folder with full read/write permission on my Windows 2003 server. With a XP client, I can create a new folder on the share folder, and I can copy files to it normally, but I can not copy these files back to my client PC. I tried use ftp,and webdav to get the files from server. None of them worked. Is the issue related with NETWORK SERVICE? Thanks for your help.

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  • Problem with Macbook air automatically not acquiring free wifi network dns or router address

    - by Rumsfeld
    I have this problem when my macbook air sometimes does not connect to free wifi hotspots. When the problem happens and I try to run the diagnostics, it normally gets to yellow network settings tab. It seems that it for some reason does not acquire automatically the router or dns address. Sometimes after I shut it down and restart it magically connects to the wifi hotspot but it is very inconsistent. Anyone knows a fix for this problem?

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  • "iTunes.app" to accept incoming network connections?

    - by cust0s
    Every time I open iTunes I get the the following warning: Do you want the application "iTunes.app" to accept incoming network connections? Clicking Deny may limit the application's behavior. This setting can be changed in the Firewall pane of Security preferences. I always click "Allow" but it still pops up. I set the OS X firewall to allow incoming connections for iTunes. Any suggestions on how to fix this?

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  • Share PC over network

    - by Sachin Verma
    I have a server installed on one local Win7 machine (say as 192.168.2.14:8080/myAPP) and I want to access that server from different computer (say ip as 192.168.2.16). Even they are connected to same network I can't access server from other computer. I guess the problem is in firewall. This is working when I disable firewall and not working when I allow certain ports in windows firewall but keeping firewall on (As a rule to allow incoming connections).

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  • VM won't see network

    - by rdefino
    I have a win7 64bit VM running on Vmware 7 workstation on a host (win7 64bit). The vm was able to see the network just fine, but now it cannot. I was running 6.5.3 and installed vmware 7 then rebuilt the vm. still nothing. The vm is set for bridge on vnet0. Any thoughts?

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  • VM won't see network

    - by rdefino
    I have a win7 64bit VM running on Vmware 7 workstation on a host (win7 64bit). The vm was able to see the network just fine, but now it cannot. I was running 6.5.3 and installed vmware 7 then rebuilt the vm. still nothing. The vm is set for bridge on vnet0. Any thoughts?

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  • How to serve a webpage on connection to WiFi network

    - by samwatt
    Hi, I would like to be able to serve a local webpage (on a LAN) when someone connects to a WiFi network. This happens quite often in libraries, cafes etc, so i'm sure it can be done, but I have no idea how and can't seem to find much through searching the web. That, and my very limited networking knowledge means I'm hoping you guys can point me in the right direction. Many thanks!

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  • PuTTY - Server Unexpectedly Closed Network Connection

    - by Austin
    I have two servers that I have been able to connect fine as s1.website.com and s2.website.com I connected to s1.website.com earlier today without any issues, however, when I connected to s2.website.com it gave me the "Server Unexpectedly Closed Network Connection" I have researched this elsewhere and someone concluded it to a "brute force attempt" However, I know this is not the case. If anyone else has had this issue please let me know. Thanks

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  • How to configure Java Network Proxy Settings for domain computers

    - by adminParsed
    I need to set the Network Proxy Settings to Direct Connection, for computers on our domain. I have looked at the unattended setup configurations, as well as the deployment.properties file, and didn't see an option to set it to Direct Connection. Are there any alternate means to set this? ex...logon script, vbscript, powershell, GPO, (would be great, but I couldn't find anything on this) Thanks

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  • Making an outside machine visible to private network

    - by William
    Hi, I'm trying to make a server visible to a every computer on a separate network without doing anything to the server but I'm not sure what would be the best way to do this. I really just need to access one folder but my attempting at NFS mounting failed since I can't NFS mount a mounted folder. Any advice? Thanks.

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  • Connect to vmware virtual machine via network

    - by Arnis L.
    I want to connect to my vmware vm from home. To work network i'm connecting through VPN. VM sits on one of the workstations (can connect to it through RDC). Any tips how to do that? What software do i need (got VMWare workstation atm)? p.s. i'm quite a newbie at this.

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  • MySQL performance over a (local) network much slower than I would expect

    - by user15241
    MySQL queries in my production environment are taking much longer than I would expect them too. The site in question is a fairly large Drupal site, with many modules installed. The webserver (Nginx) and database server (mysql) are hosted on separated machines, connected by a 100mbps LAN connection (hosted by Rackspace). I have the exact same site running on my laptop for development. Obviously, on my laptop, the webserver and database server are on the same box. Here are the results of my database query times: Production: Executed 291 queries in 320.33 milliseconds. (homepage) Executed 517 queries in 999.81 milliseconds. (content page) Development: Executed 316 queries in 46.28 milliseconds. (homepage) Executed 586 queries in 79.09 milliseconds. (content page) As can clearly be seen from these results, the time involved with querying the MySQL database is much shorter on my laptop, where the MySQL server is running on the same database as the web server. Why is this?! One factor must be the network latency. On average, a round trip from from the webserver to the database server takes 0.16ms (shown by ping). That must be added to every singe MySQL query. So, taking the content page example above, where there are 517 queries executed. Network latency alone will add 82ms to the total query time. However, that doesn't account for the difference I am seeing (79ms on my laptop vs 999ms on the production boxes). What other factors should I be looking at? I had thought about upgrading the NIC to a gigabit connection, but clearly there is something else involved. I have run the MySQL performance tuning script from http://www.day32.com/MySQL/ and it tells me that my database server is configured well (better than my laptop apparently). The only problem reported is "Of 4394 temp tables, 48% were created on disk". This is true in both environments and in the production environment I have even tried increasing max_heap_table_size and Current tmp_table_size to 1GB, with no change (I think this is because I have some BLOB and TEXT columns).

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  • Network speeds being report as 4x higher than actual in Windows 7 SP1

    - by Synetech
    Ever since installing Windows 7 SP1, I have noticed that all programs that display my network transfer rate have been exactly 4x higher than they actually are. For example, when I download something from a high-bandwidth web site or through torrents with lots of sources, the download rate indicated is is ~5MBps (~40Mbps) even though my Internet connection has a maximum of only 1.5MBps (12Mbps). It is the same situation with the upstream bandwidth: the connection maximum is 64KBps, but I’m seeing up to 256KBps. I have tried several different programs for monitoring bandwidth throughput and they all give the same results. I also tried different times and different days, and they always show the rate as being four times too high. My initial thought was that my ISP had increased the speeds (without my noticing), which they have done before. However, I checked my ISP’s site and they have not increased the speeds. Moreover, when I look at the speeds in the program actually doing the transfer (eg Chrome, µTorrent, etc.), the numbers are in line with the expected values at the same time that bandwidth monitoring programs are showing the high numbers. The only significant change (and pretty much the only change at all) that has occurred to my system since the change was the installation of SP1 for Windows 7. As such, it is my belief that some sort of change exists in SP1 whereby software that accesses the bandwidth via a specific API receives (erroneously?) high numbers while others that have access to the raw data continue to receive the correct values. I booted into Windows XP and downloaded some things via HTTP and torrent and in both cases, the numbers were as expected (like they were in Windows 7 before installing SP1). I then booted back into 7SP1 and once again, the numbers were four times higher than possible. Therefore it is definitely something in SP1 that has changed how local bandwidth is calculated/returned. There is definitely something wonky with Windows 7 SP1’s network speed calculation. I tried Googling this, but (for multiple reasons), have had a difficult time finding anything relevant. Has anybody else noticed this behavior? Does anybody know of any bugs or changes in SP1 that could account for it?

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  • how to share files over local network in ubuntu

    - by rails_guy
    I am trying to paste some files from my laptop to desktop. both have ubuntu. From the laptop I can see the desktop under Places - Network. I can see the files in the Desktop but when I try to paste a file it says "permission denied" What can I do on the Desktop so it allows my laptop to paste files?

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  • Network Tracking

    - by jeswin14
    Hi all, I am having fifty workstations which are connected to a windows server 2003 server and the internet is shared from the server .My question is , am i able to implement a tracking mechanism without using any proxy server and track all the web pages which ever visited by an individual workstation connected to a network?If possible how to achieve that kind of tracking mechanism?Some workstations do open their web pages in InPrivate browsing , can we access those browsing history?

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  • Naming PCs on a mixed hosts home network.

    - by Chris Becke
    I have a home network comprising an Apple iMacs and a Windows 7 PCs - using the internet connection sharing feature on the Windows 7 PC to share the internet connection with the iMac. I have configured the hostnames on each pc so, running hostname on the Windows 7 box says "windows7" and on the iMac says "apple", but, if I try and "ping apple" from Windows 7 or "ping Windows7" from the iMac they can't resolve. what do I need to do to get this 'simple' level on connectivity working?

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