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• Can't VNC into my OSX machine from my Windows machine

  - by KeyStroke

  Hi, I'm trying to access my OSX (snow leopard) machine from my Windows 7 machine. Both machines are within my local network I don't need outside access. I'm using Vine Server (OSXvnc) for OSX and TightVNC Viewer for Windows, but TightVNC keeps telling me that the host is unreachable. Any idea what could be wrong? how could I troubleshoot this kind of issue? Appreciate your help.

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• What's the difference between a wifi access point and station?

  - by Earlz

  I noticed that my (rooted) modem has some hidden modes for wifi. It has the default(and only setting without rooting) wireless access point, but it also has the settings repeater, ad-hoc, and station. What I'm really curious about is this station mode and how it differs from access point. I did a cursory search and didn't come up with any significant differences, other than that they are two distinct modes on many wireless chipsets. What is this station mode and how does it differ from access point?

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• All the Gear and No Idea: Suggestions for re-designing my home/office/entertainment network

  - by 5arx

  Help/ Advice/ Suggestions please: I have a load of kit that I love but which currently operate in disconnected, sometimes counter-productive way. Because I never really had a masterplan I just added these things one after another and connected them up in ad hoc ways. Since I bought my Macbook I've found I spend much less time on the MacPro that was until then my main machine. Perversely, as my job involves writing .Net software, I spend a lot of Mac time actually inside a Windows 7 VM. I stream media from the HP box to the PS3 and thus to the TV, but its not without its limitations/annoyances. We listen to each other's iTunes libraries but the music files are all over the place and it would be good to know they were all safely in one location (and fully backed up). I need to come up with a strategy that will allow me to use all the kit for work, play (recording live music, making tunes, iMovie work), pushing/streaming media to the TV and sharing files with my other half (she uses a Windows laptop and her iPod touch). Ideally I'd like to be able to work on any of the machines and have a shared homedrive that was visible to all machines so all my current files were synced up wherever i was. It would be great if I could access everything securely and quickly over the web. I'd also like to be able to set up a background backup process. The kit list thus far: Apple MacPro 8GB/3x250GB RAID0 + 1TB Apple MacBook Pro 13" 8GB/250GB - I spend a lot of my work time on a Windows 7 VM on this. Crappy Acer laptop (for children's use - iPlayer, watching movies/tv files) HP Proliant Server 4GB/80GB+160GB+300GB Sun Ultra 10 2 x 80GB (old, but in top-notch condition) PS3 160GB iPod Classic 2 x 8GB iPod Touch Observations: Part of the problem is our dual use of Windows and OS X - we can't go for a pure NT style roaming profile. Because the server is also used for hosting test/beta applications and a SQL Server db, it can't be dedicated to file serving. The two Macs really could do with sharing a roaming profile or similar. I'd love to be able to do something useful with the Ultra 10. My other half has been trying to throw it away for over five years now and regularly ask what function it serves in my study :-( I've got no shortage of 500GB external USB hard drives iMovie files are very large and ideally would be processed on a RAID system. Apple's TimeMachine isn't so great. If anyone could suggest all or part of a setup that would fulfil some of my requirements I'd be very grateful. I am willing to consider purchasing one or two more bits of kit (an Apple TV and a Squeezebox have been moted by friends) if they will help make efficiencies rather than add to the chaos and confusion. Thanks for looking.

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• VPN Error 619: Behind Cisco Router WRT310N

  - by ty91011

  I've researched a lot on all the forums and this error is too generic for any of the proposed solutions to work. I'll try to give as much detail and tried solutions. I'm running a CentOS PPTP server behind a Cisco WRT310N Router. Multiple clients from outside with different OS have failed with the same error 619, along with turning off windows firewall and disabling antivirus. I believe this is a router and IP routing issue, and not a client issue. When I connect from a client on the same router as the VPN server, it works when I use the 192. network address- but doesn't work with the public IP address. I've tried telnet to port 1723 from an outside server and I get in. I've opened up the VPN port (1723) on the router, VPN udp port (500), and the GRE port (47) to route to the VPN server's ip. Also, the server's router is behind a DSL modem. I had a glimmer of hope when this site: http://www.chicagotech.net/casestudy/vpnerror619.htm suggested that the PPoE authentication should reside on the router and not the modem. But I still came up empty. So does anybody know what the problem is?

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• Daisy-chaining network switches with multiple cables

  - by user72153

  This might just be the dumbest question you'll ever read, but I digress. Say I have two 100Mbps Ethernet switches with 2 computers on each, connected together by a single cable. This way, the two PCs on each switch share the 100Mbps bandwidth with the others. If I added another cable between the 2 switches, would there be 200Mbps throughput available between the switches? Or am I completely off my rocker? Thanks for the help.

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• 10/100 Network performing at 1.5 to 2.0 megabyte per second - is that below normal?

  - by burnt1ce

  This comes out to about 12 to 16 megabit/seond. I've read in forums that people are getting much higher speeds (ie: "40-60 Mb/s" http://forums.cnet.com/5208-7589_102-0.html?threadID=265967). I'm getting my benchmark by having a unmanged 5 port switch connected to a WRT54GS router connect. I'm sending a file from a computer connect to the WRT54GS to another computer that's connect to the unmanaged 5 port switch. Is the linkage of the switch causing this massive overhead? i doubt it. What could explain the slow down? electrical interference?

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• Intermittent "Lost connection to MySQL server at 'reading initial communication packet'"

  - by db2

  Our web environment consists of two servers. Web front-end. Dell PowerEdge R610, RHEL 5.5, Apache 2.2.17, php 5.2.14. Database server. Dell PowerEdge R710, Windows 2008 R2 Standard x64, MySQL 5.5.11-log x64. Normally these two work perfectly fine together. However, when I try to get them talking via a dedicated LAN on their secondary NICs (each machine has four of them), things get flaky. I have NIC #2 on both machines configured on the 172.16.1.0/24 subnet, with no gateway or DNS servers (obviously, since it's just those two systems), and I put the private IP address of each machine into the hosts file of the other. The routing tables on both machines look okay after I do this. I've tried this with both a crossover cable draped directly between the two NICs, and also via a dedicated vlan on the switch in the rack. In either case, I get intermittent connection problems. It's a fairly small percentage of connections that fail, but it's enough to cause a significant problem, and I have to switch back to the main network connection, which will contend with all the other traffic and hosts on the switch. The full error message that appears in the application log: SQLSTATE[HY000] [2013] Lost connection to MySQL server at 'reading initial communication packet', system error: 110 Am I doing something really dumb that's causing this to not work properly? Anything I can check in MySQL that would explain why it's failing to connect occasionally?

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• Why can I not access the internet when Windows 7 finds no issue with the ethernet connection and the network can see my device?

  - by WannabeCoder

  So I just moved from a house to an apartment. In the house and the apartment I had Uverse set up - and in both I had my desktop connected via a ~40 foot long cat5 cable. However, upon moving to the apartment I found that my ethernet connection no longer provides internet. This would seem like a mundane problem if not for: The router can see the computer on the network Windows 7 (the desktop's OS) detects no problems with the ethernet connection. Connections over the internet (i.e. browser windows, Pandora, etc.) do not immediately fail. Instead they load for 2 minutes and then finally give up. Devices connected over the Wifi (PS4, Laptop) access the internet just fine While removing the cat5 cable from my house, I accidentally damaged the locking tab but managed to bend it back into the appropriate position. I would suspect that a bad cat5 cable might be to blame if not for the above issues (thought I've heard bad cat5 cables cause the most nonsensical problems) and the fact that I tested the cat5 cable by having it share internet between my laptop (working internet) to my desktop and it functioned just fine and provided the desktop with internet. My ipconfig /all successfully finds a default gateway, DHCP server, and DNS server. What could possibly be causing the problem?

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• How to configure a Router (TL-WR1043ND) to work in WDS mode?

  - by LanceBaynes

  I have a WRT160NL router (192.168.1.0/24 - OpenWrt 10.04) as AP. It's: - WAN port: connected to the ISP - WLAN: working as an AP, using 64 bit WEP/SSID: "MYWORKINGSSID", channel 5, using password: "MYPASSWORDHERE" - It's IP Address is: 192.168.1.1 Ok! It's working great! But: I have a TL-WR1043ND router that I want to configure as a "WDS". (My purpose is to extend the wireless range of the original WRT160NL.) Here is how I configure the TL-WR1043ND: 1) I enable WDS bridging. 2) In the "Survey" I select my already working network. 3) I set up the encryption (exact same like the already working one) 4) I choose channel 5 5) I type the SSID 6) I disable the DHCP server on it. After I reboot the router and connect to this router (TL-WR1043ND) over wireless I'm trying to ping google.com. From the ping I see that I can reach this router, that's ok, but it seems like that this router can't connect to the original one, the WRT160NL (so I don't get ping reply from Google). The encryption settings/password is good I checked it many-many-many times. what could be the problem? I'm thinking it could be a routing problem, but what should I add to the "Static Routing" menu? I tried to change the IP address of the TL-WR1043ND to: 192.168.1.2 So if this a routing issue then I should add a static routing rule that says: If destination: any then forward the packet to 192.168.1.1 p.s.: I updated the Firmware to the latest version. It's still the same. p.s.2: The HW version of the TL-WR1043ND is 1.8 p.s.3: Could that be the problem that I use different routers? (If I would buy.. another TL-WR1043ND and use it instead of the WRT160NL, and with normal Firmware, not OpenWrt, then it would work?? The "WDS" is different on different routers?) p.s.4: I will try to check the router logs@night - and paste it here! :\

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• Browsing Playstation 3 from Ubuntu Box

  - by zfranciscus

  Hi, My Goal here is to be able to transfer files from my Ubuntu 10.04 box to my PS3 over a wireless network. My PS3 and my Ubuntu Box is on the same home network. These are some stuff that I tried: I can't see my PS 3 from 'Places ? Network' nor other computer that is running on windows. I am still puzzled by this fact. I have not tried ping-ing my PS3. I'll try that later today and post the result in the forum I install PS3MediaServer (http://code.google.com/p/ps3mediaserver/). Someone in the PS3 chat forum (http://www.ps3chat.com/playstation-3...lp-please.html) claims that it will enable your ubuntu box to browse PS3. So I downloaded PS3MediaServer, and ran the software. The status tab keep showing "Waiting ...". It seems that PS3MediaServer can't find my PS3. Some how I feel that 1 and 2 are related somehow.Perhaps that there is something wrong with my Ubuntu network settings that is preventing my ubuntu box from looking up other device on the network. I can go to the Internet fine, but I can't see other device on my network. Does anyone have any experience in this area. I would like to hear your experience and perhaps some solution. Any kind of hints or help will be greatly appreciated. Cheers

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• WHS - Windows Update Failure

  - by Kyle B.

  Clicking "Update Now..." inside my EX470 control panel for Windows Update produces the following error message: "Windows Home Server updates installation can not complete. Please try again later. If the problem persists, please restart the server." I have rebooted the server numerous times, and I have also used remote desktop to connect to the machine to perform the update this way, however the browser is unable to pull up http://windowsupdate.microsoft.com. This is very strange behavior because I am able to access all other sites (gmail.com, serverfault.com, etc). Would it be possible for someone to explain to me how I can check to see what is blocking the connection of this device, which apparently has a valid internet connection, to the Microsoft Windows Update site? note #1 Using the shortcut: %SystemRoot%\system32\wupdmgr.exe does not work either. It says "Connecting to 65.55.200.155..." but nothing ever happens. This is strange because all other sites seem fine. Also, I can connect to windowsupdate.microsoft.com on my local desktop so I know this is running as well

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• TP-LINK TD-W8151N Modem/router as just wi-fi router

  - by Reshma

  I am planning to buy TP-LINK ADSL wifi router (model TD-W8151N) for my Internet connection which provides Internet through ADSL telephone line. I am also planning to take cable internet in a few months which provides internet through a LAN cable without the need of any modem. So I would like to have my modem work for both connections which I am using. When using cable internet I want this TP-Link modem to work just as a wireless router (so that I can have the freedom to use my laptop in different rooms instead of sitting at a place by plugging in that cable). Is it possible to use this modem in that way? I don't have much knowledge about these things except that I can configure things as instructed. Please suggest me whether I should go ahead and buy this one or if there is any other modem in your view which can serve both my purposes, let me know. Operating System I am using: Windows 7

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• Calculating Utilization in a Stop-And-Wait Protocol

  - by AlanTuring

  So theres this question in my book and it doesn't state exactly how to go about actually calculating utilization anywhere, and i'm not being able to find any substantial information regarding everything i need to solve this question.(My mid term is next week). Anyway, here's the question: The distance from earth to a distant planet is approximately 9 × 10^10 m. What is the channel utilization if a stop-and-wait protocol is used for frame transmission on a 64 Mbps point-to-point link? Assume that the frame size is 32 KB and the speed of light is 3 × 10^8 m/s. Suppose a sliding window protocol is used instead. For what send window size will the link utilization be 100%? You may ignore the protocol processing times at the sender and the receiver. thanks to anyone who has any idea.

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• Logging network activity of LAMP server using BASH

  - by Yarin

  I've got a Fedora LAMP server on Amazon EC2 functioning as a HTTP pseudo-proxy (Sorry, don't know the terminology- It's not a true proxy where requests are relayed through apache, rather client requests are being translated by a PHP script, which then sends a new request.) I'd like to be able to fully log the HTTP cycle CLIENT - PROXY PROXY - SERVICE SERVICE - PROXY PROXY - CLIENT I'm hoping to do this using BASH tools- thinking netcat? Looking for advice and examples. Thanks!

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• setup Mac Book Wifi interface as Wifi hotspot using specific DHCP option

  - by srjohnhuang

  I want to using my Mac Book as an access point. Besides that I also need to configure its DHCP server to not provide DNS info. For example, Mac Books AP's ssid is "MacBookHotspot". While my iPhone connected to "MacBookHotspot", I want the Wifi info displayed my iPhone would be looked like: IP ADDRESS DHCP(tab) IP Address 192.168.0.1 Subnet Mask 255.255.255.0 Router 192.168.0.254 DNS Search Domains Client ID (key point: DNS filed is blank) Does anyone have any good suggestion? Thanks!

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• "entering link in browser" to "finding route to host" how it works?

  - by Algorist

  Hi, Is there a wiki or book, which explains what happens when user enters a link in the browser, and how the dns is resolved, how the router finds the route to the host etc.. I am mainly interested in routing the packets. Thank you

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• Why is my cat5e cable not okay?

  - by torbengb

  My LAN cable seems to work (indicator LED lights up) but the computer can't find a connection. What's wrong? Setup: I had to run a network cable from a router in one room to a computer to another room, through a hole in the wall that was too small to pass the RJ-45 plug through. The plug was cut off and the cable passed through the wall. Then a new plug was crimped on using this detailed explanation. The connection didn't work because the (factory-made!) plug in the other end used a non-standard wire order. I crimped a new plug on again, using the exact same order of the factory-made plug. The LED indicator lights up on both ends, but the computer cannot find a connection. What can be wrong? How can I find out? I don't have a cable tester. By visually inspecting my new plug, I think it's good; the wire order matches the other end, and all wires are all the way inside the plug and reach the connector piece. I've used the cable before (with both factory-made ends) so i don't think that the cable itself has a defect.

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• Embedded Net DVR camera1 failed to start preview!

  - by user44212

  I am gettig the following error as "Embedded Net DVR camera1 failed to start preview!" when we are trying to login and view the preview of the cameras on the DVR 8116HCI-S Standalone. There is an IP Address assigned to the same via which we access the same. I checked the site for information here http://www.hikvision.com/en/Products_show.asp?id=32. But could not find any useful information relating to the error message. We can access the same via login in from one machine but we are not able to access it from more than one machine.

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• Windows XP does not list WPA wireless networks

  - by Tomalak

  What can be the reason that Windows XP does not show WPA-encrypted wireless networks? The laptop I have problems with is an older model (Toshiba Satellite Pro 6100) with Windows XP SP3 on it, fresh install. The wireless network card in it is an Agere product that lists as "Toshiba Wireless LAN Mini PCI Card". The networks showed up perfectly before I first tried to connect to one (it was set to WPA2). The connection failed (the card supports WPA only), then something must have happend and Windows hides these networks now. A manually configured WPA setup via Windows' own wizard works, I'm using it right now. The network just won't show up in the list of available network on its own. I suspect that XP incorrectly set a flag somewhere that this network card does not support WPA. Is there such a flag, and if so, how can I change it back?

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• How to scan local network (LAN) for connected devices (Mac OS)

  - by smotchkkiss

  I'm basically looking for something like this but available on Mac. I am trying to connect a new workstation to our wireless multifunction printer and I'm having a hell of a time getting the device to spit out an IP for me to connect to. Is there a way I can scan the network somehow? If it makes a difference, the new workstation is using Mac OS X 10.6 Thanks in advance :)

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• Cisco ASA: Routing packets based on where the connections started from

  - by DrStalker

  We have a Cisco ASA 5505 (version 8.2(2)) with three interfaces: outside: IP address 11.11.11.11, this is the default route inside: IP address 10.1.1.1, this is the local subnet newlink: 22.22.22.22, this is a new internet connection. We need to move VPN users from the 11.11.11.11 address to the 22.22.22.22 address, and we're using SSH on the ASA as to test and sort out the routing. The problem we have is this: If we define a particular IP as being on a static route out the newlink interface then it can SSH to 22.22.22.22 fine. If we do not define a static route then the traffic hits the ASA, but the return traffic does not come back over newlink; presumably it gets sent over the outside interfcae as that is the default route. We can't define a static route for each remote endpoint because there are dialup VPN users, who obviously change IP a lot What we need to do is configure the ASA so if a connection comes in on the newlink interface then the outgoing packets for that go over the newlink interface, not the default route. With iptables this should be do-able by marking the connection and doing mark-routing, but what is the equivalent for a Cisco ASA?

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• Windows XP IIS5 performance across Network

  - by davidsleeps

  Hi, Just wondering whether Windows XP with IIS5 running needs any extra configuration to be suitable as a web server...I'm not considering using this for anything other than a web server on a small network for testing development etc One of the reasons I'm concerned though is that we've deployed an asp.net application to a workstation with Windows XP, and running the application using a browser on the machine (so accessing it through localhost/myApp/page.aspx and not accessing it through the network) runs the application really quickly. If another machine on the LAN accesses the same page (using http://ComputerName/myApp/page.apx) then the whole application runs noticeably slower...yet the computers are connected on a gigabit switch...so I wouldn't have thought network latency or bandwidth could be an issue... Does Windows XP need anything etc enabled or changed or network settings for it to work correctly?

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• NIC models for HVM guests in Xen 4.0

  - by Jed Daniels

  Is there a list of NIC models that I should use with various HVM guests in Xen 4.0? Is there even a list of possible choices for the model=field? I'm planning on running both Windows and FreeBSD guests on the particular Xen box that I'm configuring now, and ideally I'd like a setting that can work on both of them and get me gigabit speeds without a lot of extra hassle loading special drivers (similar to VMware's e1000 NIC option). Any suggestions? The vif line I'm currently using in my config is: vif = [ 'type=ioemu,bridge=eth0,model=ne2k_pci,script=vif-ovs' ] This works in my Windows XP SP3 VM, but is only recognized as a 10Mbit interface. Changing to model=e1000 or model=i82557b resulted in Windows not being able to find a driver for the NIC.

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• USB Wifi will not connect on Windows 7 (Even though the driver installs OK)

  - by Pete Roberts

  Windows 7 will not connect to a WiFi Netowrk using a USB Network Adapter. I have 3 adapters, A Senoa SUB 364 (EXT), a Repeatit SU2410 USB V2 and a ZYXEL G202. All of these devices install OK on Windows 7 Home Premium on my Destop PC (64 bit) and on my Asus Wii Netbook (32 bit). In each case the adapter can be enabled/disabled and the driver properties says it is working correctly. When I try and connect to a network Windows 7 behaves as though the adapter does not exist and reports no networks. The Wii has an integrated adapter which works perfectly under Windows and connects to either of the 3 networks available to me. I have done all the checks I can on the configuration. What seems odd to me is that it happens to all 3 devices on 2 different windows 7 PCs both of which are working perfectly in any other respect. This suggests the common denominator is me and I must be doing something wrong.. what's also strange is that I cannot find any similar problems being reported on any of the forums. From what reading I've been able to do it seems like the new wifi virtualisation thingy in W7 is not recognising the adapters which suggests I', missing a configuration option somewhere. Looking forward to finding out if I'm not alone or just being stupid. Pete

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• Using an audio cable (or similar) to create unidirectional communication from a secure server

  - by makerofthings7

  I'm interested in exploring how a semi-offline Root CA can be used to update CRLs to the sub CA's. This answer on Security.SE mentions using an audio cable for this purpose. Doe anyone have details on how an Audio cable (or similar) can be used to create a unidirectional path of communication? Since I'm a .Net programmer, I'm also open to code samples, drivers, etc that may enable this scenario.

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