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I am setting up a vpn but have just started at this company. Is there a way of checking the range of internal ip ranges as i will need that information. I also need my fixed broadband ip address - is that something i get from my provider. Thank you in advance
You can get your broadband ip address easily by going to any desktop computer or server working on the LAN, open a browser window and go to http://ipchicken.com . The name is funny but right on the homepage you'll have the ip address of the wan side or your router in big bold font.
There are bunch of other web sites that have this too. This one may be easier to remember because of it's unique and somewhat entertaining name. Their slogan or catch phrase is "Served Fresh Daily". All the links on the page, though there aren't many, are ad-clicks so don't bother.The grass may not be greener on the other side . . . but it just might have less weeds. :-D
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The fixed broadband IP address is definately something that given or allocated to you by the service provider.
If internet access is already working at this office and all desktop are currently accessing the web, then the fixed public IP is already in place. Maybe do a double check in the not so distant future to verify that it will not change. If it's a cable modem service, the ip address could change and the VPN may stop functioning depending on how it was configured.
The grass may not be greener on the other side . . . but it just might have less weeds. :-D
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If DHCP is configured on the network and you can logon to either the server or router that's providing the DHCP services, you could see the ip address scope configuration.You can find the IP address of the system or device providing the service by running IPCONFIG /ALL at a command prompt of any 2K or XP computer on the LAN that can connect to the web.
You could also use some third party utilities to scan the network for all used addresses. Search any engine with the term angry IP scanner and you have list in the search result a coupld of doanload pages for the scanner. It's free and small so it downloads fast and installs even faster - there's no real setup and it easy to figure out for a quck scan of the ntwork. There are lots of others. Foundstone, now part of McAfee, has a nice free one too that checks for open ports too but takes longer to complete the scan for IP addreses. It's name is advanced IP scanner. I've used them both often.
The grass may not be greener on the other side . . . but it just might have less weeds. :-D
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"open a browser window and go to http://ipchicken.com...This one may be easier to remember because of it's unique and somewhat entertaining name."
What about http://whatismyip.com? Not as entertaining, but it certainly menas what it says.
Michael J
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Assuming your office LAN is only using one logical subnet, you can calculate the starting and ending address of this subnet given the IP address and subnet mask of only one client.
Go to one client, and from the command prompt, type "ipconfig /all" and paste the results.
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I've used whatismyip.com many times. Also whatsmyipaddress.com is good, whatismyipaddress.com provides addressing but is loaded with pop-ups. There are a bunch.
If someone isn't using the above types often they could start guessing and that's when they could hit sites with pop-ups or worse.
Sure they could write it down but then they'll have to find where they wrote it.Whatsmyip.com for example has nothing pertaining to IP addressing at all and like I mentioned whatusing whatismyipaddress is full of pop-ups and just a step away from adding bad-ware through the browser onto the unsuspecintg person's computer.
The bottom line is each support person will have their own preference as to what to use for a given situation. Knowing multiple sites or ways to do things is even better and provides a form of redundancy or failover. If whatismyip is down, another site could be a backup.
The grass may not be greener on the other side . . . but it just might have less weeds. :-D
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ipconfig /all will provide the right information to determine his subnet, mask, gateway, and a bunch of other stuff. What it will not do is tell him what addresses are in use.
He is looking to add a device to the network. A scan can effectively tell what IP addresses are in use and available. There are other ways like examining the scope in DHCP and active leases will give him alot of information too. If there is no DHCP then a scan obviously will be the best option for listing available addresses. If the scope does not encompass the entire address space then, as you probably know already, an address that's outside the scope can be picked and pinged for availability. This method has problems too because of desktop firewalls blocking ICMP.
The grass may not be greener on the other side . . . but it just might have less weeds. :-D
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