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• OS X 10.6 won't automatically connect to wireless even though remember network is checked

  - by Hendy

  Upgraded to 10.6 recently. 10.5 would connect to my home network whenever I was home. 10.6 constantly pops up the network selection dialog and asks me what network I want to join. I click my home network and the password is already entered (so it "remembers" the network). "Remember network" is checked... but it does it every time. How do I get 10.6 to connect to networks automatically whenever it sees them?

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• Where do I learn about IP blocks and subnets? Or is there just a calculator that does it all for me?

  - by cwd

  Amazon's elastic compute tool (among others) requires the ip block format for their command: ec2-authorize websrv -P tcp -p 80 -s 205.192.0.0/16 I may be doing this wrong, but as far as I can tell I need to use the block format even for a single IP address. 1) So, how would I do that for this IP? 71.75.232.132 Several years ago I took a CCNA class, and I remember going over IPs and subnets, masks, broadcast addresses, class a/b/c networks, etc. However a lot seems to have changed since then - for example I don't think you can tell what "class" a network is in just by looking at it anymore - sometimes they could be multiple classes. 2) Anyhow, my second question is where do I go to get a refresher on all these things? 3) Or should I just be using ipcalc or an online calculator to do it all for me - and if so, which one?

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• Correct way to set up office network - 8 workstations, a file server and a staging server

  - by naunu

  Our office had this old school windows 2003 domain setup, our server caught fire, and now we are looking to do it right from scratch. Here is what we need: 5 PC and 3 Mac workstations for web development, they will each have WAMP/MAMP setup on them, managed by their developers. We will have a file server for assets, and a LAMP server with an external IP for staging. Here is what we have to work with: 5 IP addresses, brand new PC file server with windows 2008 SE, D-Link DSS-16+ 16 port switch, belkin 5 port wireless router, cable modem with 4 ports. How I have it set up now (this is a temporary makeshift setup): Cable modem = LAMP server, wireless router Wireless router = Switch = All of the workstations and file server (setup as a workgroup). We have noticed our internet is very slow with us all plugged in to the switch, and the switch plugged in to the router. I am not positive, but I think it is because our router does not have NAT. We are also having problems with the MACs connection to the network drive - it keeps disconnecting. I want this done right, and we have a ~$600 budget to buy anything else we need. Does anybody have any advice for me? Should I set up a domain or workgroup?

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• Block spam by using geoip filter?

  - by faultyserver

  We are looking for a way to be able to block spam based on geographic location by filtering using geoip. context: we rarely have any email correspondence outside of the USA, so we would like to block all incoming email outside the US except for maybe one or two countries. After a little Googling I have found a couple of solutions that may work (or not), but I would like to know what other sysadmins are currently doing or what they would recommend as a solution. Here is what I have found so far: Using PowerDNS and its GeoIP backend it is possible to use geoip for filtering. Normally this backend is used to help distribute load as a kind of load balancing but I dont see why it couldnt be used to kill spam as well? Possibly use the Maxmind lite country database and some scripting to do a similar job. Ideally what I am looking for is a solution that would handle decent load and scale well too...aren't we all! ;) Thanks in advance for your help! :-)

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• Microsoft Remote Desktop Bandwidth Usage

  - by Salman A

  I am wondering how much bandwidth in terms of bytes sent/received is consumed by a typical remote desktop session. I need to know this because our ISP enforces a cap on monthly bandwidth usage (i.e. the total amount data in GB that can sent or received in a month). So just wondering like how much KBs or MBs are transferred per hour in an average RDP session.

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• Security for university research lab systems

  - by ank

  Being responsible for security in a university computer science department is no fun at all. And I explain: It is often the case that I get a request for installation of new hw systems or software systems that are really so experimental that I would not dare put them even in the DMZ. If I can avoid it and force an installation in a restricted inside VLAN that is fine but occasionally I get requests that need access to the outside world. And actually it makes sense to have such systems have access to the world for testing purposes. Here is the latest request: A newly developed system that uses SIP is in the final stages of development. This system will enable communication with outside users (that is its purpose and the research proposal), actually hospital patients not so well aware of technology. So it makes sense to open it to the rest of the world. What I am looking for is anyone who has experience with dealing with such highly experimental systems that need wide outside network access. How do you secure the rest of the network and systems from this security nightmare without hindering research? Is placement in the DMZ enough? Any extra precautions? Any other options, methodologies?

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• Mac: Execute program when joining a specific wireless network

  - by Jon

  My question is essentially the same as this one, but for OS X 10.6 instead of Windows 7. I would like to run a program whenever I connect to my home wireless network (not the one at work or university). I'm sure there's a program that does this, but unfortunately my google-fu isn't strong today.

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• Problem with VPN using 2 Wire Router with a Linksys Router.

  - by Hiram Hubbard

  I am having a problem with a VPN between a 2 Wire router and a Linksys router. 2 wire is the client PC using Linksys Quick VPN software and Linksys RVS4000 is the server. The PC is not the issue. It works on a different network not using 2 wire. Also the Linksys RVS4000 is not the issue, 3 other user can VPN to it with no problem not using 2 Wire. The problem is with 2 Wire. The client PC is getting this error: "The remote gateway is not responding" What configuration changes are needed on the 2 Wire router (port, UPNP, etc...) and what changes are needed if any on the Linksys RVS4000? Thanks.

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• Huawei HG8245T Router - not connecting to another router

  - by BubbaK

  I just got a fiber optic connection installed at home and due to the build of the house, it's mostly cement/bricks, the wireless connection isn't received throughout the house. Previously, to combat this issue, I just ran a hardwire from the modem downstairs and upstairs and had it connected to a secondary (DLink) router. It did the job of getting me seamless wireless internet access everywhere. The issue is now with the new Huawei router, this setup isn't working. I have connected everything as previously, but it seems that the other (DLink) routers are not picking up the connection. I have tried everything and am totally lost as what to do to overcome this problem. Any help would be appreciated.

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• I used route delete 0.0.0.0 in Windows 7 and now i can't connect to my adsl internet

  - by Santiago Sanchez

  I was looking for a way to portfoward 0.0.0.0 default gateways and I found in a Microsoft page that I had to try the command route delete 0.0.0.0, my internet disconnected and I couldn't connect to the internet anymore... Does anyone have a solution? It's an ADSL Modem. I have: Windows 7 x32 4 GB ram A kanji modem that has this problem too... It's like Windows doesn't detect the wireless adapter, so it won't connect to the internet.

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• QoS, Squid, Virgin superhub

  - by swiss196

  I'm a student and have just moved into a house of 6. We've setup 100mb broadband with Virgin and get quite good speeds on it so we're really pleased. However, as there are 6 of us, who all like to stream/game/download etc I was looking at setting up QoS to ensure speeds were fair/equal etc. I looked into it and found out that the Virgin Superhub can't do it out of the box, so my next option is to setup squid proxy on my machine (always on) to act as at transparent proxy and provide QoS etc. However, I'm not really sure how to do this and had a look on the Internet but couldn't see any guides as such! I was wondering if someone could give me some more and perhaps provider a summary of the steps involved - and let me know if this is possible with the SuperHub etc. Thanks, Dave

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• VoIP - need setup ip network with our SIP operator

  - by evgeniy.labusnkiy

  Need to make next one: for ex i'm now in UAE, but i need to make a call to my girlfriend who is in Ukraine. I need to find the way how can i make the connection to my home router and make the call from VoIP gateway using my standard phone network in Ukraine. I have some imagination about this, to do like this: Connect to router or VoIP gateway (how? soft?) using inet - Gateway make a call using standard phone line in my country. Any ideas? Best practice? What devices i need to make this? Pay attention that i don't want to use any SIP providers. Thats a lot!

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• Can't access an internal IIS web site via IP address, only hostname

  - by chris-untrod-com

  I have a machine on my home network running Windows Server 2008 (IIS7) with a web application running under default website called HTCOMNET. The network is just on a Windows Workgroup. The server is named nas1 and has a (dynamically assigned) IPv4 address of 192.168.2.12. I can ping 192.168.2.12. When I ping the machine by name ("nas1"), the hostname resolves to an IPv6 link-local address (as opposed to the ipv4 address). In a browser, I can go to http://nas1/HTCOMNET/ and IIS serves the site, no problem. But if I go to http://192.168.2.12/HTCOMNET, no dice. I have all the windows firewalls turned off. Any idea what's going on? I can't for the life of me figure out why I can't hit IIS via the IP. I feel like it's something really obvious, but i can't figure out what. Thanks!

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• Connect work laptop (domain) to home workgroup

  - by jjeaton

  Is there an easy way to have my work laptop connect to a home workgroup for file sharing with my other PCs, but then easily switch back to connecting to my work domain when I'm at work? I have the following setup: Windows 7 Home Premium Server/HTPC 2 Windows XP laptops 1 Vista laptop (Work) The work laptop connects to a work domain, the remaining computers are on a home workgroup for sharing files/printer. Also is it possible to share files over my LAN while I'm connected to the work domain, but at home? I've tried Live Mesh, but my 2 home laptops are very slow and don't work well with it. I also use Dropbox, but I'd like to be able to share larger files. I may be missing a simple solution here...

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• Unable to connect to MSN network with Adium

  - by Adam Driscoll

  I'm new to the Mac world and tried both MSN Messenger for Mac (7.0 and 8.0 beta) as well as Adium to connect to the Windows network. I've enable 'Allow all incoming connections' in the Firewall settings. Windows Live Messenger works fine when connecting through the same router on my Windows laptop. I've triple checked my password and verified it through a web browser and Windows Live. Any ideas what my issue could be?

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• internet connection drops randomly

  - by Remus Rigo

  hi all I have 3 PC's at home (with Win XP, Win 7 & Win 7) and a router. I am always connected to the internet through the router (PPoE connection). My problem is that sometimes when I want to search or open a page, my browser tells me that the server cannot be reached, as if I don't have a connection to the internet. Other times it logs me out from messenger, but browsing still works. FTP download/upload also works. If i disable and enable the LAN then all works fine. The connection doesn't always drop on all three PC's at the same time. Anyone got any idea besides re-installing OS? thanks

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• Why does a website server recieve local files much slower than recieve files on other websites?

  - by T...

  The server at http://any2djvu.djvuzone.org receives same files from local computers much slower than from links on other websites (with the same files have been uploaded to the other websites, such as dropbox.com). The speed of uploading a file from local computers to other websites such as dropbox is also much faster than to any2djvu website. For example, a pdf file of 17MB needs more than 1 min to be uploaded to any2djvu server from a local computer with normal ISP such as Comcast High-speed internet, but takes less than 3 seconds from a dropbox link to any2djvu server, and takes around 10 seconds from the same local computer to dropbox. I wonder why there is such big differences for the speeds of different uploading ways to a web server? Thanks!

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• NFSv3 Asynchronous Write Depends on Block Size?

  - by Joe Swanson

  I am trying to figure out if my NFSv3 deployment is performing SAFE asynchronous writes. I suspect that it is doing strictly synchronous writes, as I am getting poor performance in general. I used Wireshark to look at the 'stable' flag in write calls, and look for 'commit' calls. I noticed that, with especially large block sizes, writes to appear to be performed asynchronously: dd if=/dev/zero of=/proj/re3/0/zero bs=2097152 count=512 However, smaller block sizes appear to be performed strictly synchronously: dd if=/dev/zero of=/proj/re3/0/zero bs=8192 count=655360 What gives? How does the client decide whether to tell the server to perform writes synchronously or asynchronously? Is there any way I can get smaller block sizes to be performed asynchronously?

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• How to use the AWUS036H on MacBook Pro with Lion and Backtrack in VM?

  - by Swader

  I have the AWUS036H USB WiFi adapter and have recently upgraded the OSX to Lion. The thing is, there are no drivers for Lion for the AWUS036H, and I would have to boot into 32bit mode every time I want to launch the adapter as per instructions here: http://www.youtube.com/watch?v=n9_HAGi1ce0 I also want to install BackTrack as I deal in networks a lot for my company. While this would be a simple matter on any other laptop, the company issued Macbook does not allow booting into any OS other than MacOSX or Windows with Bootcamp. Now, since dual booting into BT is not an option, I would like Backtrack to run in VM inside my MacOSX Lion - and this it does. It works like a charm inside VirtualBox. But since there are no 64bit drivers for the wifi adapter, Lion doesn't recognize it and cannot install it. This, in turn, means that Backtrack cannot see it even though AWUS036H usually works flawlessly with BT. How can I make my VM-based BT see the wifi adapter even if the parent OS doesn't see it, if at all? Is there a way, or am I better off buying a new WiFi adapter that supports OSX 10.7 such as the AWUS036NHR?

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• How do I mount my Linksys WRT610N to maximize range and connection strength?

  - by KnipSter

  The current generation linksys routers have internal antennae. I currently house my primary router in my basement and would like to maximize the strength with which it covers my home. Is there directionality to the antennae, should I mount it vertically on a wall?

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• Problem with Jumbo Frames

  - by Spookyone

  Hello, I am trying to set up jumbo frames on my gigabit home LAN but no luck so far. My setup is: * D-Link DIR-655 router, HW Revision A3, Firmware 1.21 EU * Synology DS107+, Firmware 3.0-1337 * Laptop w/ Win7 x64, external PCIx NIC managed by "Generic Marvel Yukon 88E8053 based Ethernet Controller" The router is supposed to support jumbo frames but doesn't feature any relevant setting. I set the Jumbo Packet value to 9000 on both the NIC and the Synobox but it doesn't work, ping -f -l 8972 says "Packet needs to be fragmented but DF set". Is there any other setting I overlooked, the DIR-655 doesn't actually support jumbo frames, or what else could be the problem?

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• please demystify the 10Gb ethernet interfaces, cables

  - by maruti

  this really is a Dell question but tempted to ask the experts @ serverfault. choosen a Dell powerconnect 8024 10GbE switch. per the spec sheet this has 10GbaseT ports. "24x 10GBASE-T (10Gb/1Gb/100Mb) with 4x Combo Ports of SFP+ (10Gb/1Gb) or 10GBASE-T" the HBA on my storage server has 10G CX4 copper ports Dell does not sell any cables and this adds to my confusion. from the picture Dell 8024 seems to have RJ-45 type ports on the front panel? my question: is it a RJ-45 + CX4 cable or CX4 + CX4 cable?

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• Route traffic from one VPN to a second VPN

  - by Dominic

  I have set up an OpenVPN server on my windows 7 64-bit PC. I also have a subscription to a VPN service. My aim is to be able to connect my android phone to the VPN server on my PC, and then route all traffic through the VPN service. I have a NetGear WPN824 router. I can get it working if I my phone is on my local network. Then I can connect my phone to the VPN server using the local IP address of my PC. In Network Connection in the control panel, I share the connection used by the VPN service with the connection used by the VPN server. Then when I browse the internet on my phone, all traffic goes through the VPN service. Very nice. But if my phone is outside my local network, so I have to connect my phone to the local VPN using my PC's external IP address, then this method doesn't work. If I connect my PC to the VPN service and then try to connect my phone to my own VPN, it just doesn't connect (the initial TLS handshake times out). If I connect my phone to the local VPN first, then this connection is lost as soon as I connect my PC to the VPN service. Does anybody know how I can get this working? Many thanks Dominic

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• Is dual boot via wake on lan possible?

  - by ianfuture

  Is it possible to set up a PC so it can Wake on Lan and then have the option of which OS to boot into? I want to have a secondary PC with Windows and a *nix variant installed. I want the PC to be in a remote room so I can connect via a wireless hub to it and then boot it up as and when required and choose which OS to boot into. If it is possible how would I go about it? Any recommendations on how to do it or where I can get more info on how to do it? Thanks.. Ian

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• Oracle 11g network configuration

  - by Kylo

  I installed Oracle 11g Enterprise Edition on my Windows 7 Pro. My problem is that I cannot log into database from other host (local network). When I connect to database using Oracle SQLdeveloper everything is ok as long as I specify 'localhost' in connection configuration. However, when I change it to '192.168.0.190' which is my host IP address I get 'The Network Adapter could not establish the connection'. I get the same error when logging in from other host in local network. What is the problem?

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