Sorry I should have been more clear, how would you do this in code? Thanks for the quick response. Sorry that you like me are stuck in the office today.
John Warner > -----Original Message----- > From: Discussion of advanced .NET topics. > [mailto:[EMAIL PROTECTED] On Behalf Of Phil Sayers > Sent: Friday, May 23, 2008 8:56 AM > To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM > Subject: Re: [ADVANCED-DOTNET] Network Search > > > Hi John, > > I'm not exactly sure what your asking here, but i'll take a > stab and you let me know where i can add detail or embellsih further. > > DNS is a network service usually running on one or more > Domain Controllers (in a windows environment). DNS maps an > "IP address" to a "friendly name". > > for example, when you try to connect to your sql server from > your local machine, and you use the name of the server > instead of the IP addres. Under the covers there is a query > to the DNS network service to find the IP address for a > computer with that "name". > > There are 2 "lookups" you can perform in DNS. One is a > "forward lookup" (called an "A" record), the other is a > "reverse lookup" called a "PTR" record. "A" records and "PTR" > records can be linked so if one changes, the other one > changes too. But this is not forced, they can be independant > (which can lead to some odd netowrk behaviors, but can also > be needed for some configurations). > > IIRC > a "forward lookup" takes a "name" and returns an IP address. > a "reverse lookup" takes an IP address and returns a name. > > so...to set this up. > Assume Client/Server application. You need to run the > "server software" on a physical server, but don't want to > have to "bake in" the name of that physical server computer. > Think up a "name" that represents your server software. For > Example "MyAppServer". Now you can "bake in" the > "MyAppServer" into your client software, or at least use that > as a default in the config file. > > To set this up within the DNS system.... > Go to your domain controller that has the DNS service > running. (this might be running on a firewall appliance > instead...check with your network admin, however the > principles and concepts reamin valid). Open up the "DNS > Manager" tool. Start >Control Panel > Administrative Tools > DNS > > You need to create an "A Record" in the "forward lookup > zone", WITHOUT "an associated PTR record". the record name > will be "MyAppServer" and the IP address will be the IP of > the physical server where your "server software" is installed. > > This way anytime a computer on the network requests > "MyAppServer", they will be directed to the appropriate IP > address as referenced in the DNS record you just created. > > This allows you to move the "server software" to a different > physical machine, and you can redirect all "clients" by > editing the DNS record to point to the new IP address. Saves > a reconfigure at end user desktops...and lots of legwork. > > > > > > > -----Original Message----- > From: Discussion of advanced .NET topics. > [mailto:[EMAIL PROTECTED] Behalf Of John Warner > Sent: Friday, May 23, 2008 8:28 AM > To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM > Subject: Re: [ADVANCED-DOTNET] Network Search > Importance: Low > > > Phil have you got a link to how you would implement that > don't worry about the PHServer stuff, just normal IP? Thanks > > John Warner > > > > > > -----Original Message----- > > From: Discussion of advanced .NET topics. > > [mailto:[EMAIL PROTECTED] On Behalf Of > Phil Sayers > > Sent: Friday, May 23, 2008 8:23 AM > > To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM > > Subject: Re: [ADVANCED-DOTNET] Network Search > > > > > > If you can guaruntee DNS will be running on your software's > > destination network, you could create a "host" A-record in DNS (ex: > > PHSERVER, and client software can use that, or be > configured on what > > hostname to attempt to connect with. > > > > It a bit of hack, and adds an additional > dependency/requirement (DNS) > > to your product, but it is a possible solution. > > > > -----Original Message----- > > From: Discussion of advanced .NET topics. > > [mailto:[EMAIL PROTECTED] Behalf Of > Peter Osucha > > Sent: Friday, May 23, 2008 7:57 AM > > To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM > > Subject: Re: [ADVANCED-DOTNET] Network Search > > > > > > Thanks Peter (and others who've responded). This gives me > some good > > info to work with. > > > > Peter > > > > -----Original Message----- > > From: Discussion of advanced .NET topics. > > [mailto:[EMAIL PROTECTED] On Behalf Of Peter > > Ritchie > > Sent: Thursday, May 22, 2008 2:53 PM > > To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM > > Subject: Re: [ADVANCED-DOTNET] Network Search > > > > Yes, if PHost isn't running or isn't listening continuously, the > > you'll have to pick an arbitrary length of time to listen. > > > > You might want to have a look at the DHCP protocol [1]. > > Parts of it's protocol sound much the same as you've described. > > > > [1] http://support.microsoft.com/kb/169289 > > > > On Thu, 22 May 2008 14:28:52 -0400, Peter Osucha > > <[EMAIL PROTECTED]> wrote: > > > > >Then I guess I need to choose some length of time to 'listen' for > > >replies? PHost should send a specific reply to the > originating node > > >providing, for example, the name of its machine? > > > > > >Peter > > > > =================================== > > This list is hosted by DevelopMentor. http://www.develop.com > > > > View archives and manage your subscription(s) at > > http://discuss.develop.com > > > > =================================== > > This list is hosted by DevelopMentorR http://www.develop.com > > > > View archives and manage your subscription(s) at > > http://discuss.develop.com > > > > =================================== > This list is hosted by DevelopMentor. http://www.develop.com > > View archives and manage your subscription(s) at > http://discuss.develop.com > > =================================== > This list is hosted by DevelopMentorR http://www.develop.com > > View archives and manage your subscription(s) at > http://discuss.develop.com > =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
