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I usually just go to my network preferences, in system preferences. The router listed should be the same as the DHCP-server. A lot easier than remembering any commands..
Good thought, but not 100% correct. The DHCP server does not have to be the same as the router address. In a small network, i.e. at home, this will almost always be true, but in a larger network, the DHCP server is often another machine and not the router.
this is not the case.. your dhcp server and router may not even be in the same subnet depending on how your network is configured.
A router is a router and a server is a server. Don't confuse the two. A router *may* have a DHCP server built into it as well as a switch, but it need only be a router. And Excel is not a database regardless of how many people want to use it as one.
The DHCP server and router are not necessarily always going to be same thing.
Mac Os X Dhcp Server Software Download
You can also do something like 'ipconfig getoption en1 server_identifier', but replace en1 with your own interface (usually en0 = ethernet, en1 = airport on Macs).
Add extensions on mac apps.
We had a need for this functionality when we started registering MAC addresses for the network.
I came up with this applescript so users can just double-click on it to get their DHCP server address. Obviously if you need to get a different interfaces DHCP server change 'en0' to the interface needed.
Make sure to save it as an application:
do shell script 'ipconfig getoption en0 server_identifier'
set theIP to the result
display dialog 'Your DHCP server IP is: ' & theIP
Hmmm. Doesn't seem to work for me in Panther (10.3.9). I get nothing at all.
If you get nothing when you run the command it probably means you have a static, not DHCP, IP address.
Yep -- that's it. I forgot I had a static address on my at-work Mac!
We were using this at one of my former workplaces when 10.0 came out. It's worked on every Mac OS X version since then, all the way up to the present.
Well, it's unique to Mac OS X if you don't count Windows as an OS. ;)
Breaking my server to save yours.
Do I get in any of this the MAC address of my cable modem?
not sure if this gets you what you need, but i use google to find out my 'external' ip address when i'm behind a dhcp network.
just google 'what's my ip address', and click on the first result.
that website will tell you what ip address it sees coming from you, which, if i'm not mistaken, is the ip of the dhcp server.
yeah in most cases this is simply router's IP. Now how about getting DNS primary and secondary addresses?
When I do a google of 'what's my ip', I got 3 different answers in the results, all of which don't match the wan ip in my widget..and none of them match the terminal output, go figure (small home network, cable modem, router as dhcp server)
% ipconfig getpacket en0 (en1 for airport )
then look for
I had to hunt down a machine running DHCP today. I used the IPCONFIG tip to find the IP. Then, I used the 'arp -a' command to get the MAC address. I matched it to the hardware by the sticker on the machine.
I think if the 'arp -a' command didn't show the IP-MAC pairing, you could get it back into the list by pinging the IP address, then using arp to get the MAC address.
I'm pretty sure that this requires the other computer to be on the same subnet. Otherwise, arp might return the MAC of the gateway or router.