 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Java Forum / General / October 2007remote type
Hi all, how can I find out what some ip represents on LAN (ex. router, switch, server etc)? thx.... On Oct 10, 4:02 pm, ion...@yahoo.com wrote: > Hi all, > > how can I find out what some ip represents on LAN (ex. router, switch, > server etc)? > > thx.... I don't think an IP address can tell you anything about the device that it is associated with. Maybe is better question how can I find this devices on LAN? > Maybe is better question how can I find this devices on LAN? Well, first, the device may not be on your LAN at all. (Here I mean LAN = Ethernet segment.) But if you just want to talk to the device... int [] addr = { 192, 168, 1, 0 }; InetAddress deviceInetAddr = InetAddress.getByAddr( addr ); Socket deviceSocket = new Socket( deviceInetAddr, somePort ); out = new PrintWriter( deviceSocket.getOutputStream(), true ); in = new BufferedReader( new InputStreamReader( deviceSocket.getInputStream() ) ); Note: not syntax checked or compiled... http://java.sun.com/docs/books/tutorial/networking/sockets/index.html http://java.sun.com/j2se/1.4.2/docs/api/java/net/InetAddress.html > Hi all, > > how can I find out what some ip represents on LAN (ex. router, switch, > server etc)? > > thx.... google for nmap. :-) Generally, you'd have to ask the device what it is, and not every device will tell you. Perhaps if you were more specific on *why* you need to know this information? Its not generally that useful.  SignatureDaniel Pitts' Tech Blog: <http://virtualinfinity.net/wordpress/> >how can I find out what some ip represents on LAN (ex. router, switch, >server etc)? see http://mindprod.com/jgloss/ip.html Internal IPs usually have the form 192.168.0.1 .. 192.168.255.254 SignatureRoedy Green Canadian Mind Products The Java Glossary http://mindprod.com >> how can I find out what some ip represents on LAN (ex. router, switch, >> server etc)? > > see http://mindprod.com/jgloss/ip.html > > Internal IPs usually have the form 192.168.0.1 .. 192.168.255.254 Or one of the other IP ranges allocated for the purpose. SignatureLew >>> how can I find out what some ip represents on LAN (ex. router, switch, >>> server etc)? [quoted text clipped - 4 lines] > > Or one of the other IP ranges allocated for the purpose. I suspect Lew refers to RFC1918 published in 1996. http://www.faqs.org/rfcs/rfc1918.html However, some (non IT) businesses internally use IP-address ranges that they were allocated prior to 1996. >> Internal IPs usually have the form 192.168.0.1 .. 192.168.255.254 > >Or one of the other IP ranges allocated for the purpose. There are others possibilities, not seen as often, see http://mindprod.com/jgloss/ip.html SignatureRoedy Green Canadian Mind Products The Java Glossary http://mindprod.com >how can I find out what some ip represents on LAN (ex. router, switch, >server etc)? You would have to probe the device, perhaps with a generic GET on port 80 and see what happens. I am unaware of any protocol by which devices identify their powers other that which ports they respond to. SignatureRoedy Green Canadian Mind Products The Java Glossary http://mindprod.com > how can I find out what some ip represents on LAN (ex. router, > switch, server etc)? With SNMP. Or by keeping track of the addresses you assigned to those devices when you installed them. There is no magic information in the numbers unless you choose to assign them that way. /gordon -- Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
|
Reply to this Message
|
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2009 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.