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Geek Culture / Obtaining router's external IP address programmatically....

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CattleRustler
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Posted: 10th Feb 2004 20:38 Edited at: 10th Feb 2004 20:39
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Hi, before I go scouring the web for information I figured I'd ask you guys first... I need to obtain my router's external IP address (assigned by isp) programmatically from a windows 2k machine. It can be a batchable command or some script or whatever, I am open.
It is needed because the router in question is being assigned via dhcp by the isp and the ip has the potential to change - since this router is in front of a VPN server I need to know when the ip changes so I can update the client vpn connections. I plan to write a windows service that obtains the ip address of the router and emails to my machine every 4 hours (or some similar occurence)

Thanks in advance
James (not Fat-Ass-Bob)

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Gery
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Posted: 10th Feb 2004 20:47
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right clic on the connection icon, other menu (WinXP)
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CattleRustler
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Posted: 10th Feb 2004 20:54
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@ Ge3ri

what part of "Programmatically" didn't you understand ?

oh yeah, ALL OF IT!

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Gery
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Posted: 10th Feb 2004 21:19
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i said how to get the isp....
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OSX Using Happy Dude
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Posted: 10th Feb 2004 21:21 Edited at: 10th Feb 2004 21:29
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You would probably need to use the WNET commands - never used them yet, so I dont know exactly how to do it.

IanM would probably know...


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CattleRustler
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Posted: 10th Feb 2004 21:26 Edited at: 10th Feb 2004 21:30
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ya, I had a look at NET... commands and TRACE.. command (TRACE PRINT) but no joy. I may have missed something tho, that's why I am asking around and looking online. You can do this from Linux from a console command but I am using windows so....there ya go

where's IanM ?


edit: I just went thru WMI Objects and I can get the router's static internal address 192.168.1.1, if that helps somehow in getting me closer. Another thought I just had: Does dhcp renewal write to the system event log? If so I can hook into that event and snoop the entry object's data to see if it's the renewal, and if so shoot the email out via CDObjects....just a thought....

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OSX Using Happy Dude
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Posted: 10th Feb 2004 21:33 Edited at: 10th Feb 2004 21:37
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No idea - he's never around when his brain needs to be picked...

I wasn't talking about .NET by the way - I was talking abouw the WNET commands that are part of the Platform SDK (and thus availiable from C).

It looks like you may need to enumerate all networks first - before querying each IP address (possibly)...


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CattleRustler
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Posted: 10th Feb 2004 21:39
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nope, just figured it out SILLY ME - the email has the machine IP data I need in the hidden headers! DOH!



thanks anyway tho!!
<smacks self around with a smelly wet monk-fish>

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CattleRustler
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Posted: 10th Feb 2004 21:41
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ps @ TCA I thought you menant NET.. commands from windows console, you know, like NET SHARE, NET STATISTICS, etc etc

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IanM
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Posted: 10th Feb 2004 22:41
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Glad you sorted it out yourself

I know how to get all sorts of details about the current machine, but I wouldn't know where to start to get the ip on an external router

For free Plug-ins, source and the DBPro Interface library for Visual C++ 6 and .NET
http://www.matrix1.demon.co.uk
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CattleRustler
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Posted: 10th Feb 2004 23:30
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ended up being blindingly simple - as most "huge" problems usually do.

do you use Windows Management Instrumentation (WMI) and/or Performance Counter Objects ? I find them very very powerful for windows programming - especially in .NET

rock on

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