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  • one way routing

    - by user101531
    I have two computers connected with VPN, and some virtual machines on each. I want everything to see each other (that is basically 4 different networked machines). What I've not managed so far is that a computer on the one end to be visible to the other end. In tracert terms: 192.168.78.42>tracert 192.168.69.18 Tracing route to WIN-2K8R2 [192.168.69.18] over a maximum of 30 hops: 1 <1 ms <1 ms <1 ms 192.168.78.17 2 * * * Request timed out. 3 217 ms 78 ms 78 ms WIN-2K8R2 [192.168.69.18] Trace complete. 192.168.78.42>tracert 192.168.69.112 Tracing route to 192.168.69.112 over a maximum of 30 hops 1 <1 ms <1 ms <1 ms 192.168.78.17 2 333 ms * 337 ms WIN-2K8R2 [192.168.86.22] 3/4/5 * * * Request timed out. 6 ^C 192.168.69.18>tracert 192.168.69.112 Tracing route to 192.168.69.112 over a maximum of 30 hops 1 <1 ms <1 ms <1 ms 192.168.69.112 Trace complete. 192.168.69.112>tracert 192.168.78.42 Tracing route to 192.168.78.42 over a maximum of 30 hops 1 1 ms * <1 ms 192.168.69.18 2 79 ms 77 ms 80 ms 192.168.86.21 3 80 ms 77 ms 81 ms 192.168.78.42 Trace complete. Note: the 4 machines are 192.168.69.112 (winXP), 192.168.69.18=192.168.86.22 (win2K8R2), 192.168.86.21=192.168.78.17 (Linux), 192.168.78.42 (win2K3). The VPN is a TAP openvpn connection between 192.168.86.21 and 192.168.86.22. I would say that the problem is in the win2K8 machine, but Windows networking is my weak point.

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  • No internet connection using Edimax routers

    - by idan315
    I have two computers connected to a router, connected to my ADSL modem by PPPoE. One of those computrs use Windows XP, the other uses Windows 7. The computer using Windows 7 keeps getting limited or no connectivity, and I can't use it to connect to the internet. Connecting the computer to the modem without the router 'in the way' worked, and I was able to use the internet - which led me to believe that the problem is with my router. However, I have changed my router, and the problem persists. I am really lost on how to approach this problem. Possible leads: when I view the network information, I see that my computer is connected to 'Multiple Networks'. One of those is "Network 4" (probably my router), and the other is Unidentified network. I don't know how to make the "Unidentified Network" disappear, or why is it even there in the first place. When I try using "ipconfig", I have two default gateway IPs. The first is 0.0.0.0, and the second is the IP of my router (192.168.2.1). The first router was Edimax BR-6204Wg. The second one I've tried connecting is BR-6424n. Any ideas?

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  • Overheating computer

    - by Samurai Waffle
    My computer overheats somewhat frequently, usually during intense use. And by intense use I mean browsing the internet while downloading, or gaming. It even overheats on extremely old games though, Master of Orion 2, which was developed for Windows 95. My computer has a Pentium 4 Ghz processor, 2 GB of ram, and is running Windows XP. One of the symptoms it has after overheating, is that it'll turn on immediately afterwards, but won't show any video on my monitor. I usually have to wait at least 5 minutes (mostly at least 10) before I can get it to turn on and show video on my monitor. I also usually have to wiggle around the graphics card a little bit, which is the ASUS A9550 Series with 256 MB. I'm not sure exactly what is causing the computer to overheat. At first I thought it was the video card, but after I noticed it was doing it while playing Master of Orion 2, I'm not so sure, because that game can't be making the video card work all that hard. So how exactly can I pinpoint the problem? Thanks for any help provided. Edit: Okay I downloaded the programs that you specified, and will start benchmarking my system to try and pinpoint what's overheating. What is the temperature range for when it's getting to hot? Also I have an abundant amount of software experience with computers, but unfortunately not to much hardware experience.

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  • Setting up a network e-mail server

    - by Jason
    Hello, My boss just asked me to buy a new server for our office network. I know next to nothing about servers and networking, so I need someone to point me in the right direction. He said he wants this to be our e-mail server with a network login. I have no idea how to set up an e-mail server, especially one that sends/receives e-mail using our domain name. We use a terrible piece of order/inventory software called Mail Order Manager (MOM). Our computers currently connect to the MOM database through a networked drive. My boss would like to move away from this peer-to-peer MOM setup. The software publisher offers a SQL version of MOM, but it's way overpriced. Is there a better way to connect to these databases without using the SQL version? Finally, the server needs to be running Windows. Does this question make sense, is it possible, and can someone help me get started? Thanks!

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  • Destination host unreachable - Windows Server 2008

    - by Doug
    Hi There, I'm working with a windows 2008 domain controller, which I'm having issues connecting to internet resources. A small bit of background, this is a 2008 domain controller that has been added into an existing Win 2k domain, with a goal of replacing the older computers. Both of the older controllers can still access internet resources, and so can all the clients. When I ping Google.ca from the new server, it does resolve to an ip address, but then says "Reply from 192.168.123.20: Destination host unreachable." I'm really at a lost now, I've checked and rechecked my ip configuration, the default gateway is my router, the primary DNS server is the my DC, and the secondary DNS is also my router. The DNS server on the domain has a forwarder added for the router as well. Everything on my local network works just fine, all my internal resources can be resolved. For the time being, I've stopped the Firewall service. I'm not 100% used to Server 2008 yet, but it might be a case of just missing something simple. Thanks for your time.

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  • Destination host unreachable - Windows Server 2008

    - by Doug
    Hi There, I'm working with a windows 2008 domain controller, which I'm having issues connecting to internet resources. A small bit of background, this is a 2008 domain controller that has been added into an existing Win 2k domain, with a goal of replacing the older computers. Both of the older controllers can still access internet resources, and so can all the clients. When I ping Google.ca from the new server, it does resolve to an ip address, but then says "Reply from 192.168.123.20: Destination host unreachable." I'm really at a lost now, I've checked and rechecked my ip configuration, the default gateway is my router, the primary DNS server is the my DC, and the secondary DNS is also my router. The DNS server on the domain has a forwarder added for the router as well. Everything on my local network works just fine, all my internal resources can be resolved. For the time being, I've stopped the Firewall service. I'm not 100% used to Server 2008 yet, but it might be a case of just missing something simple. Thanks for your time.

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  • Printer sharing problem (win7 / WinXP): Canon pixma USB printer

    - by Rabarberski
    For a friend, I am trying to share a USB Canon pixma ip3000 printer between two computers in his home network. But I can't get it to work due tot a Canon driver problem. The printer is connected to the Windows 7 (64 bit) computer, and we would like to be able to print from a Windows XP computer. 'Normally' it should be no problem to use Windows printer sharing, however, because one machine is 32-bit and the other is 64-bit, installing an extra driver is required. T he driver provided by canon (here) is described as a 'Canon Inkjet Printer Driver Add-On Module'. The problem is that the .inf file contained in the .exe file isn't accepted as a driver when prompted by the Printer Sharing Wizard, I suspect because it is an add-on driver (whatever that may be). I've connected and installed the printer locally on the XP machine first (which works), so that the XP machine would already know the driver when using it as a network printer, but that doesn't work; the wizard still wants a driver file. Anybody suggestions how to get this working? Maybe there is some sort of generic driver (would be OK even with limited functionality)?

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  • How to know if your computer is hit by a dnschanger virus?

    - by kira
    The Federal Bureau of Investigation (FBI) is on the final stage of its Operation Ghost Click, which strikes against the menace of the DNSChanger virus and trojan. Infected PCs running the DNSChanger malware at unawares are in the danger of going offline on this coming Monday (July 9) when the FBI plans to pull down the online servers that communicate with the virus on host computers. After gaining access to a host PC, the DNSChanger virus tries to modify the DNS (Domain Name Server) settings, which are essential for Internet access, to send traffic to malicious servers. These poisoned web addresses in turn point traffic generated through infected PCs to fake or unsafe websites, most of them running online scams. There are also reports that the DNSChanger virus also acts as a trojan, allowing perpetrators of the hack attack to gain access to infected PCs. Google issued a general advisory for netizens in May earlier this year to detect and remove DNSChanger from infected PCs. According to our report, some 5 lakh PCs were still infected by the DNSChanger virus in May 2012. The first report of the DNSChanger virus and its affiliation with an international group of hackers first came to light towards the end of last year, and the FBI has been chasing them down ever since. The group behind the DNSChanger virus is estimated to have infected close to 4 million PCs around the world in 2011, until the FBI shut them down in November. In the last stage of Operation Ghost Click, the FBI plans to pull the plug and bring down the temporary rogue DNS servers on Monday, July 9, according to an official announcement. As a result, PCs still infected by the DNSChanger virus will be unable to access the Internet. How do you know if your PC has the DNSChanger virus? Don’t worry. Google has explained the hack attack and tools to remove the malware on its official blog. Trend Micro also has extensive step-by-step instructions to check if your Windows PC or Mac is infected by the virus. The article is found at http://www.thinkdigit.com/Internet/Google-warns-users-about-DNSChanger-malware_9665.html How to check if my computer is one of those affected?

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  • Adobe Acrobat Pro 9.0 on Windows 7 print to network share gives error

    - by Archit Baweja
    I've recently upgraded a client's workstations to brand new computers, with Windows 7 Professional. The server is still Windows Server 2003. The server has 2-3 file shares that get mapped to users' workstations as drives. The client has also upgraded from Acrobat 6.0 to 9.0 Pro. Since the upgrade, when the client tries to print to the Adobe PDF printer (aka convert something to PDF via the printer interface), it gives an error in the queue if the file is being saved on the network drive. If I instead provide a local path, the file "prints" fine. Additionally, if I change the Adobe PDF printer's settings to "don't spool, print directly to printer", it prints to the network share fine, but then it resets that setting every time. Things I've checked for: Permissions on the network share. The user and the computer has full access. We even gave the "Everyone" ibject full access. Reinstall Adobe Acrobat Pro 9.0 Run updates to upgrade to 9.3.4 Has anyone else bumped into such a problem? The support fellows from Adobe are just taking me around in circles. They don't seem to have a clue either.

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  • What device can create wireless network while connecting to an ethernet router

    - by Nicolo
    Hi, I have access to an ethernet port of a wireless router. I simply connect my laptop to it via an ethernet cable. There are a total of four such ports on the wireless router. Now I want to connect a device (a wireless access point? wireless bridge? wireless switch?) via an ethernet cable to one of the other ethernet ports of the router. I want this device to act as a kind of wireless switch - it should "split" the ethernet connection coming from the router to two or more computers that connect to this device via a wireless. Basically, I have a wireless router with its wireless function switched off. I don't know the password for that router so can't activate the wireless function. Don't know the password of the ISP either. The only thing I can do is to connect via ethernet cable to the wireless router and this does not require a password. Now I want to use that connection and build a wireless upon it. What kind of device do I need? I am not really very well informed about network management and find the descriptions "wireless access point", "wireless bridge", "wireless switch" confusing. I know what an ethernet switch is - what I need is a device which would do the same but by allowing the clients to connect to it via a wireless. What kind of device would do that? Any recommendations about specific products?

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  • "Modern" Ethernet over coax

    - by Electrons_Ahoy
    So, I've just bought a house. It's reasonably new - built in the early '00s. One of the features that got built in was a cable TV drop in every room. The cabling is gorgeous - there's even a wiring cabinet of sorts in a closet where the cables all tie together to the splitter to the outside line. Of course, my problem is that I only own the one TV. I do, however, own a few computers. What I would love to be able to do is drop a switch in the wiring closet and run 100/1000BASE-T ethernet over the coax in the walls I wouldn't otherwise be using. My fantasy would be if you could get some kind of adapter-plug-thing that would take a coax plug on one side and a cat5/RJ45 plug on the other. Had anyone else done this? Any suggestions? (There are a few other options that suggest themselves - first, I could just use the existing cabling channels and re-run cat5 or 6 through the walls. While tempting, that sounds like more work than I really want to put in, so I'm calling that Plan B. Also, I could just scare up a mess of old 10BASE2 cards and run the house on thinnet, all mid-90s style. While I think I'd get major style points for that, I don't think I can get a 10BASE2 adapter for the new laptop. Also, I have all these super-snazzy gigabit adaptors I'd like to be using. And so forth.)

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  • Web server with static IP from cable provider

    - by Dmitri
    I have a subscription to 5 static IP addresses. I want to run a web server from behind a router. My network config is as follows: Server's local address is 10.1.10.2, has IIS running on it, port 80 and 443 (IIS is not my fault, had to be done) the server's ip address is static, the subnet mask is 255.255.255.0, gateway is 10.1.10.1, which is the local address of the cable modem / router / gateway thingy. All looks to be in textbook order as far as the LAN goes. I can get to anything on my LAN from any computer on my LAN, whether they have static IP or get it through DHCP from the cable modem/router thingy. however, I have no internet access form any of my LAN computers. I called Comcast tech support and they say they can connect to my modem/router just fine and can actually use it to ping any computer on the internet or any computer on my LAN from the router/modem (i checked, myself, this is in fact the case). However, nothing on my LAN has internet connectivity. I tried pinging the DNS servers, nothing. I tried directly typing in web sites' IP addresses, nothing, so doesn't seem to be a DNS issue. Any Ideas? What malfunction of a router could be causing such weird behavior? nay ideas or educated guesses are very much appreciated.

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  • DNAT to 127.0.0.1 with iptables / Destination access control for transparent SOCKS proxy

    - by cdauth
    I have a server running on my local network that acts as a router for the computers in my network. I want to achieve now that outgoing TCP requests to certain IP addresses are tunnelled through an SSH connection, without giving the people from my network the possibility to use that SSH tunnel to connect to arbitrary hosts. The approach I had in mind until now was to have an instance of redsocks listening on localhost and to redirect all outgoing requests to the IP addresses I want to divert to that redsocks instance. I added the following iptables rule: iptables -t nat -A PREROUTING -p tcp -d 1.2.3.4 -j DNAT --to-destination 127.0.0.1:12345 Apparently, the Linux kernel considers packets coming from a non-127.0.0.0/8 address to an 127.0.0.0/8 address as “Martian packets” and drops them. What worked, though, was to have redsocks listen on eth0 instead of lo and then have iptables DNAT the packets to the eth0 address instead (or using a REDIRECT rule). The problem about this is that then every computer on my network can use the redsocks instance to connect to every host on the internet, but I want to limit its usage to a certain set of IP addresses only. Is there any way to make iptables DNAT packets to 127.0.0.1? Otherwise, does anyone have an idea how I could achieve my goal without opening up the tunnel to everyone? Update: I have also tried to change the source of the packets, without any success: iptables -t nat -A POSTROUTING -p tcp -s 192.168.1.0/24 -d 1.2.3.4 -j SNAT --to-source 127.0.0.1 iptables -t nat -A POSTROUTING -p tcp -s 192.168.1.0/24 -d 127.0.0.1 -j SNAT --to-source 127.0.0.1

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  • Virtual Machines Renaming/Backing up/Sharing

    - by evan
    I've started using VMware virtual machines for all of my software development projects and have a few questions for others doing the same thing. First, how can you rename the virtual machine and the name of the virtual hard drive? I have a base development machine that I clone for different projects. I'd like to name the machine and it's hard drive according the the project (right now when I copy them via cut and paste, the file names remain the same and I can only organize them by putting them in a specific directory). Second, what is the best way to back up a virtual machine? Is it possible (by breaking the virtual hard drive up into chunks instead of one big file) to get incremental backups working? It seems time machine always tries to make a copy of the whole thing which is time consuming because each virtual machine is around 30GB. Finally, how slow would it be to have a virtual machine shared on an NFS mount on a wireless N network and used from multiple computers (but with only one person using it at a time.) Would it be more reasonable on a gigabit lan connection? Thanks for your input! And please feel free to share any advice or wisdom about using virtual machines for software development and the best ways to speed them up!

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  • Can't connect to LAN when connected to D-Link DIR-615

    - by Senseful
    I'm have a D-Link DIR-615 Wireless N 300 Router. I didn't use the CD it comes with to set up the network. Instead I configured it manually through the router's settings that are accessed via a web browser. The main changes I made are: Secured the router so that a password is required before clients can use the wireless internet. Broadcasting 802.11N only (not B or G). I can connect to the router just fine and I'm able to access the internet. The only problem is that I don't see any of the other computers in my LAN. When I try connecting to another Wi-Fi router that I have (which is connected to the same network), I can see all of the computer's on my LAN just fine. Therefore, I'm guessing that the reason I can't connect to the LAN is not a problem with my computer and is a problem with the router instead. I'm on a MacBook Air running Mac OS X 10.6.6. I tried contacting D-Link technical support, but they only try to help you if you have problems connecting to the internet. They aren't really concerned with problems that have to do with the accessing PC's on the same network.

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  • How to install/upgrade to Windows 8.1 RTM without a Microsoft account

    - by abstrask
    When I installed Windows 8, I deliberately chose not to use a Microsoft account to sign in. I like to keep things separate, and just logon with a tradional local account. Any apps that require me to sign-in with my Live account, will have to prompt me to sign-in. Now, I just updated to 8.1, but towards the end of the setup process, I was asked to sign-in with a Microsoft account or create one. Unlike when installation Windows 8, there didn't seem to be any option to skip that step, or otherwise close the sign-in prompt and continue to my updated Windows installation. At least not that I could find. This is particular annyoing, when setting up computers for friends and family, whom I support. They may not have, or have any interest in getting, a Microsoft account and I'm reluctant to use my own. I realize I can disconnect my Microsoft account after the fact, but is there really no way to install, or upgrade to, Windows 8.1, without being forced to create a Microsoft account? If there is, how does one go a about that?

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  • Remotely managing Scheduled Tasks on another computer: Access Denied

    - by Eptin
    I need to remotely create new scheduled tasks from a Windows 7 computer in my company (which according to this Microsoft TechNet article I should be able to do. http://technet.microsoft.com/en-us/library/cc766266.aspx ) From within Task Scheduler, on the menu I click Action Connect to another Computer. I browse for the remote computer's name (I use Check Names to verify that the name is correct) and then I check 'Connect as another user' and enter \Administrator and the local admin password. Whenever I try this, I get the error message Task Scheduler: You do not have permission to access this computer Firewall isn't the problem I am able to use Remote Desktop with this username & password combo, so I would expect it to work when remotely managing as well. The remote computer has firewall exceptions for Remote Scheduled Tasks Management, Remote Service Management, and Remote Desktop among other things. Heck, I even tried turning off the firewall for that individual computer and it still didn't work. More details: I have administrative remote access to several other Windows 7 Enterprise computers, though I log in as the local Administrator (whose administrative rights are only recognized by that local machine, not by the domain). The computer I am managing from is on the domain, and also has administrative rights that are recognized on the domain. More experimentation: If I go the other way around and remote-desktop into the other machine and from there open task scheduler then 'connect to another computer', I am able to connect back to my main computer using the username & password that is recognized by an administrator on the domain, and successfully schedule a task on my main computer. So it's not a company firewall issue that's preventing anything from working. The only permissions requirement Microsoft talks about is "The user credentials that you use to connect to the remote computer must be a member of the Administrators group on the remote computer". I'm logging in as an Administrator on each of the local machines, so why doesn't it work?

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  • Apache outputs all urls of a second domain as a subfolder of the primary domain name

    - by s_rathbone
    Hi all, would anyone be able to possibly give me some guidance.. Basically, i have a 'shared hosting' account with a large internet hosting provider, and my account lets me have multiple seperate domains within this folder structure.(note: not aliased domains and not sub domains). so, my goal is to have 2 domains set up. i have already purchased the two domain names i need: The first domain is the 'primary' domain name for the root folder(eg. www.example1.com) and the second domain name is set for one of its sub folders(eg. www.example2.com is set to the folder www.example1.com/sites/music). The problem is that when apache returns a page of the second domain back to the browser, apache writes the hyperlinks as if it's a sub folder of the first domain ( eg. www.example2.com/index.html. comes out as http://www.example1.com/sites/music/index.html). Now, I have done some reading on this, looking though "Apache: the definitive guide"(o'reilly), and although it was useful, couldn't really find the answer. i'm guessing this issue is most likely an apache setup issue in http.conf, rather than an issue with the hosting company itself (which is why im posting it here) and I have also been to the official documentation for apache site, and i am guessing i might need to use something like the rewritebase directive in htaccess files.. but im really not sure, im more of a java programmer guy, and have been struggling with this for a couple of days. Any guidance would be REALLY appreciated. If it helps, my hosting company is godaddy, and my sites are hosted on linux. My problem was originally with wordpress which i reinstalled a number of times in various ways to correct the problem, but ive just done a test with a very simple static html, and it still has the same issue with relative urls like this: <html> <head></head><body><a href="images/dog.html">Pictures of Dogs</a></body> </html> However, it is fine if i hardcode the urls like this: <html> <head></head><body><a href="http://www.example2.com/images/dog.html">Pictures of Dogs</a></body> </html> Thanks heaps, Steve R NOW FIXED Ok, the problem has now been fixed, and i didn't need to modify any .conf or .htaccess files. The problem was, that when I went to install the second application into a second domain from the godaddy site, one of the setup questions is that it asks you which site you want it installed to. after that it asks for the desired folder path. However, the problem was that the second domain name was already pointing to the correct subfolder of the primary domain. So when I started installing wordpress again and came to the menu to select which site it was for, and it listed only the primary domain as an option, i assumed that this was like a label of "which hosting account?", or "which primary domain will your application will be installed under?" because I already knew that in the next step i was specifiying the folder. In order to correct this, you must make sure that your second domain is added to your domain list so that it will be listed as an option during the installation process. For further details please read tystips.com/archives/52/how2-save-money-host-multiple-wordpress-blogs-on-a-single-godaddy-hosting-account/

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  • httpd.conf configuration - for internal/external access

    - by tom smith
    hey. after a lot of trail/error/research, i've decided to post here in the hopes that i can get clarification on what i've screwed up... i've got a situation where i have multiple servers behind a router/firewall. i want to be able to access the sites i have from an internal and external url/address, and get the same site. i have to use portforwarding on the router, so i need to be able to use proxyreverse to redirect the user to the approriate server, running the apache/web app... my setup the external urls joomla.gotdns.com forge.gotdns.com both of these point to my router's external ip address (67.168.2.2) (not really) the router forwards port 80 to my server lserver6 192.168.1.56 lserver6 - 192.168.1.56 lserver9 - 192.168.1.59 lserver6 - joomla app lserver9 - forge app i want to be able to have the httpd process (httpd.conf) configured on lserver6 to be able to allow external users accessing the system (foo.gotdns.com) be able to access the joomla app on lserver6 and the same for the forge app running on lserver9 at the same time, i would also like to be able to access the apps from the internal servers, so i'd need to be able to somehow configure the vhost setup/proxyreverse setup to handle the internal access... i've tried setting up multiple vhosts with no luck.. i've looked at the different examples online.. so there must be something subtle that i'm missing... the section of my httpd.conf file that deals with the vhost is below... if there's something else that's needed, let me know and i can post it as well.. thanks -tom ##joomla - file /etc/httpd/conf.d/joomla.conf Alias /joomla /var/www/html/joomla <Directory /var/www/html/joomla> </Directory> # Use name-based virtual hosting. #NameVirtualHost *:80 # NOTE: NameVirtualHost cannot be used without a port specifier # (e.g. :80) if mod_ssl is being used, due to the nature of the # SSL protocol. # VirtualHost example: # Almost any Apache directive may go into a VirtualHost container. # The first VirtualHost section is used for requests without a known # server name. #<VirtualHost *:80> # ServerAdmin [email protected] # DocumentRoot /www/docs/dummy-host.example.com # ServerName dummy-host.example.com # ErrorLog logs/dummy-host.example.com-error_log # CustomLog logs/dummy-host.example.com-access_log common #</VirtualHost> NameVirtualHost 192.168.1.56:80 <VirtualHost 192.168.1.56:80> #ServerAdmin [email protected] #DocumentRoot /var/www/html #ServerName lserver6.tmesa.com #ServerName fforge.tmesa.com ServerName fforge.gotdns.com:80 #ErrorLog logs/dummy-host.example.com-error_log #CustomLog logs/dummy-host.example.com-access_log common #ProxyRequests Off ProxyPass / http://192.168.1.81:80/ ProxyPassReverse / http://192.168.1.81:80/ </VirtualHost> <VirtualHost 192.168.1.56:80> #ServerAdmin [email protected] DocumentRoot /var/www/html/joomla #ServerName lserver6.tmesa.com #ServerName fforge.tmesa.com ServerName 192.168.1.56:80 #ErrorLog logs/dummy-host.example.com-error_log #CustomLog logs/dummy-host.example.com-access_log common #ProxyRequests Off </VirtualHost>

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  • Viewing a large-resolution VNC server through a small-resolution viewer in Ubuntu

    - by Madiyaan Damha
    I have two Ubuntu computers, one with a large screen resolution (1920x1600) that is running default ubuntu vnc server. I have another computer that has a resolution of about 1200x1024 that I use to vnc into the server (I use the default ubuntu vnc viewer). Now everything works fine except there are annoying scrollbars in the viewer because the server's desktop resolution is so much higher than the viewer's. Is there a way to: 1) Scale the server's desktop down to the viewer's resolution. I know there will be a loss of image quality, but I am willing to try it out. This should be something like how windows media player or vlc scales down the window (and does some interpolation of pixels). 2) Automatically shrink the resolution of the server to the client's when I connect and scale the resolution back when I disconnect. This seems like a less attractive solution. 3) Any other solution that gurus out there use? I am sure someone has experienced this before (annoying scroll bars) so there must be a solution out there. Thanks,

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  • What's the risk of running a Domain Controller so that it is accessible from the internet?

    - by Adrian Grigore
    I have three remote dedicated web servers at different webhosts. Adding them to a common domain would make a lot of administration tasks much easier. Since two of the servers are running Windows 2008 R2 Standard, I thought about promoting them to Domain Controllers in order to set up the windows domain. There's another thread at Serverfault that recommends this. At the same time I've read a lot of times on different websites that this is not a good idea because an domain controller should always be behind a firewall LAN. But I can't set up something like this because I don't have a LAN with a static IP accessible from the internet. In fact I don't even have a windows server in my LAN. What I have not found out is why exposing a DC to the Internet would be bad idea. The only risk I can see is that if someone penetrates one of my webservers, it should be much easier to penetrate the others as well. But as far as I can see that's the worst case scenario since I am only going my web servers to that domain, not any computers from my local network. Is this the only downside or does it also make it easier to penetrate one of my web servers in the first place? Thanks, Adrian

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  • disk-to-disk backup without costly backup redundancy?

    - by AaronLS
    A good backup strategy involves a combination of 1) disconnected backups/snapshots that will not be affected by bugs, viruses, and/or security breaches 2) geographically distributed backups to protect against local disasters 3) testing backups to ensure that they can be restored as needed Generally I take an onsite backup daily, and an offsite backup weekly, and do test restores periodically. In the rare circumstance that I need to restore files, I do some from the local backup. Should a catastrophic event destroy the servers and local backups, then the offsite weekly tape backup would be used to restore the files. I don't need multiple offsite backups with redundancy. I ALREADY HAVE REDUNDANCY THROUGH THE USE OF BOTH LOCAL AND REMOTE BACKUPS. I have recovery blocks and par files with the backups, so I already have protection against a small percentage of corrupt bits. I perform test restores to ensure the backups function properly. Should the remote backups experience a dataloss, I can replace them with one of the local backups. There are historical offsite backups as well, so if a dataloss was not noticed for a few weeks(such as a bug/security breach/virus), the data could be restored from an older backup. By doing this, the only scenario that poses a risk to complete data loss would be one where both the local, remote, and servers all experienced a data loss in the same time period. I'm willing to risk that happening since the odds of that trifecta negligibly small, and the data isn't THAT valuable to me. So I hope I have emphasized that I don't need redundancy in my offsite backups because I have covered all the bases. I know this exact technique is employed by numerous businesses. Of course there are some that take multiple offsite backups, because the data is so incredibly valuable that they don't even want to risk that trifecta disaster, but in the majority of cases the trifecta disaster is an accepted risk. I HAD TO COVER ALL THIS BECAUSE SOME PEOPLE DON'T READ!!! I think I have justified my backup strategy and the majority of businesses who use offsite tape backups do not have any additional redundancy beyond what is mentioned above(recovery blocks, par files, historical snapshots). Now I would like to eliminate the use of tapes for offsite backups, and instead use a backup service. Most however are extremely costly for $/gb/month storage. I don't mind paying for transfer bandwidth, but the cost of storage is way to high. All of them advertise that they maintain backups of the data, and I imagine they use RAID as well. Obviously if you were using them to host servers this would all be necessary, but for my scenario, I am simply replacing my offsite backups with such a service. So there is no need for RAID, and absolutely no value in another layer of backups of backups. My one and only question: "Are there online data-storage/backup services that do not use redundancy or offer backups(backups of my backups) as part of their packages, and thus are more reasonably priced?" NOT my question: "Is this a flawed strategy?" I don't care if you think this is a good strategy or not. I know it pretty standard. Very few people make an extra copy of their offsite backups. They already have local backups that they can use to replace the remote backups if something catastrophic happens at the remote site. Please limit your responses to the question posed. Sorry if I seem a little abrasive, but I had some trolls in my last post who didn't read my requirements nor my question, and were trying to go off answering a totally different question. I made it pretty clear, but didn't try to justify my strategy, because I didn't ask about whether my strategy was justifyable. So I apologize if this was lengthy, as it really didn't need to be, but since there are so many trolls here who try to sidetrack questions by responding without addressing the question at hand.

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  • Can a wifi AP act as a client, and a server at the same time?

    - by nbolton
    I feel this is SF worthy (as opposed to SU) as I go into a bit of detail on gateways/routing. Here's my ideal setup (if possible) -- there is a wifi network (lets call it bob's) with which I want access to, but I have a few other computers on my network which I want to keep behind a firewall. So I was thinking of buying a wireless access point so that I could set it up to connect to bob's network from the AP, and then from my server, connect to the AP via ethernet. So that's the first bit. Second part is that I want to have my own private wifi network off the back of this; can I then tell the AP to serve a new network called foobar. When I say private network, I mean that my server is actually a Debian linux install with routing configured (and I also do some QoS stuff on, etc). So ideally, I'd like all the clients on the private network to be behind the server in terms of routing. However, if the private clients connect to the server via wifi, then aren't they exposed to the "public" network? That is, if someone is savvy enough to scan for my IP range. Also, to do routing I'd need to connect two ethernet cables between the server and the AP (because you can't do routing/QoS on virtual devices) -- which isn't a problem really; but I'm not sure whether the AP will allow me to separate the public and private LANs. Or, as well as the AP, am I better getting a wifi-to-ethernet adapter for the server? I could use a wifi usb, but this can be tricky to set up on headless linux; plus the signal strength is a bit lousy. If this question is a bit vague/spurious in places, please comment and I will explain in more detail.

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  • Port forwarding + shared connection with Ubuntu

    - by Joey Adams
    Because my wireless router's ethernet ports are defective, I set up a shared wireless connection from my laptop (which has wifi) to my eMac (which does not) via a crossover ethernet cable. The laptop is behind a router as 192.168.1.131, and the eMac is behind the laptop as 10.42.43.1 . The laptop is running Ubuntu 9.10 (Karmic). I achieved the shared connection through NetworkManager Applet. I right-clicked on the network icon at the topright, went to Edit Connections, selected the Wired connection named "Auto eth0", clicked "Edit...", went to the "IPv4 Settings" tab, and selected the Method "Shared to other computers". The eMac can now access the Internet. Now I want to enable port forwarding. There's a game I want to play that needs port 6112 forwarded (both TCP and UDP) in order to host games. I set up the router to enable port forwarding for 192.168.1.131 (the laptop), but port forwarding still isn't available on the eMac. I suppose I need to pretend my laptop is a router and configure port forwarding on it, indicating that incoming connections to the laptop (192.168.1.131) should be forwarded to the eMac on the shared connection (10.42.43.1 ). Thus, packets coming into the router on port 6112 would be redirected to the laptop (by the router), then to the eMac (by the laptop). My question is, how would I do that on Ubuntu (in light of NetworkManager's presence)? Also, if I can't get this to work, does anyone mind hosting a comp stomp? :D

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  • Two hosting providers running simultaneously... possible / not possible? good practice / unnecessary?

    - by user29600
    For the sake of their reputation, I won't mention the names. But I'll just use: Business I worked for previously - ABC Web Dev Hosting company they used - XYZ Hosting I recently found out that XYZ Hosting had some sort of incident where they ended up losing a lot of their client's data - including ABC Web Dev's. ABC Web Dev was able to recover some of their customer's websites, after pulling them from their local development computers and putting them up on another hosting provider. They ended up losing a lot of clients because of it and their reputation ruined. I'm starting my own web dev company and I don't want to run into this same issue. I'm planning on using Rackspace but, although they are a great company, according to wikipedia they still have had downtime in their past. I thought it might be a good idea to try to run two providers at once, to ensure that if anything happened in one the websites would still be live because of the other. I know the websites would have to be pulling from one server at all times, but if there's a way to redirect requests to the second server if the first one is down that would solve my issue. As a note, we will have a staging environment setup locally which will allow for quick recovery if a provider did have any issues, however I'd like to avoid any downtime at all if possible. So my questions are: Has anyone tried running two providers simultaneously? Would this be considered good practice or am I going too far? Is there really any way to run two simultaneously where one server acts as a backup?

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