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Posted by Warren on September 25, 2006, 11:04 pm
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$Bill wrote:
> RD wrote:
>> Wow..how insightful. Nice to see that you really took the time to grasp
>> the
>> essence of my post. Google? Sheesh, never in a million years would I
>> have
>> thought of that. You go girl!
>
> I thought it was a prety good response. There are sites that will
> just echo the IP you are calling from (which would end up being your
> modem's IP). Here's just one: http://www.whatismyip.com/
No. That's the IP address assigned to the CPE connected to the modem. In
my case, it's my router's IP, which can also be found in the headers of
this post.
Because the cablemodem is just a bridge, upstream servers don't need to be
aware of it's IP address, and they do not report it, either. Someone else
mentioned a tool called IP2. This also does not report the modem's IP
address, but reports the IP address of the CPE connected to the modem.
If you have a typical computer -> router -> cablemodem -> Internet
configuration, there are a number of IP addresses involved.
-Your computer will likely have a 192.168.x.x number assigned by the
router.
-Your router will have a 192.168.x.x address that it's known by to the
computers on your LAN.
-Your router, being the CPE, will have an IP address assigned by the cable
network's DHCP server. To the outside world, this is "your IP address".
-The cablemodem has a 192.168.x.x address that can be accessed only from
the CPE side of the cablemodem. This is the address that you use to access
the internal webserver that gives you status and diagnostic information
about the modem.
-The cablemodem also has a 10.x.x.x address that can be accessed from the
cable network. This address is usually only used for troubleshooting and
some administrative purposes that are done by the network admins using
TCP/IP.
If you are looking at a public range IP address that is associated with
you, it is your CPE's IP address, not the cablemodem's IP address. The
cablemodem does not have a public range IP address. It has a class C
private address on the CPE side, and a class A private range address on
the network side. And you're not going to be able to get that address from
upstream servers, as they don't care about the IP address of a bridge on
the way to the CPE.
--
Warren H.
==========
Disclaimer: My views reflect those of myself, and not my
employer, my friends, nor (as she often tells me) my wife.
Any resemblance to the views of anybody living or dead is
coincidental. No animals were hurt in the writing of this
response -- unless you count my dog who desperately wants
to go outside now.
Power Lawncare Tools for Spring Clean-up:
http://www.holzemville.com/mall/blackanddecker/
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Posted by Bill M. on September 25, 2006, 8:52 pm
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wrote:
>>
>>> Does anyone know of a program that will let you find the IP address of a
>>> broadband modem connected via router?
>>
>> There are many web sites that will tell you exactly what IP address
>> you're coming from.
>>
>> Google is your friend.
>
>Wow..how insightful. Nice to see that you really took the time to grasp the
>essence of my post. Google? Sheesh, never in a million years would I have
>thought of that. You go girl!
Actually, I thought Elmo's suggestion was the simpler one to
implement. Your initial question implies that you want to know your
public (WAN) IP address. You can get that from the router, as you
know, but doing so requires a login/password. You can also do it via
any of a handful of Internet web sites, and in that case no login is
required. It's your choice, but the "no login" option seems a bit
easier in case you've never scripted anything before. If you do have
that experience or are willing to learn a bit, then either way will
work equally well.
--
Bill
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Posted by on September 25, 2006, 9:00 pm
If you were Registered and logged in, you could reply and use other advanced thread options >
>
>wrote:
>
>>>
>>>> Does anyone know of a program that will let you find the IP address of a
>>>> broadband modem connected via router?
>>>
>>> There are many web sites that will tell you exactly what IP address
>>> you're coming from.
>>>
>>> Google is your friend.
>>
>>Wow..how insightful. Nice to see that you really took the time to grasp the
>>essence of my post. Google? Sheesh, never in a million years would I have
>>thought of that. You go girl!
>
>Actually, I thought Elmo's suggestion was the simpler one to
>implement. Your initial question implies that you want to know your
>public (WAN) IP address. You can get that from the router, as you
>know, but doing so requires a login/password. You can also do it via
>any of a handful of Internet web sites, and in that case no login is
>required. It's your choice, but the "no login" option seems a bit
>easier in case you've never scripted anything before. If you do have
>that experience or are willing to learn a bit, then either way will
>work equally well.
I get mine via a simple snmp command:
$ snmp_request 192.168.2.1 public getnext 1.3.6.1.2.1.4.20.1.1
1.3.6.1.2.1.4.20.1.1.ww.xx.xx.zz = ww.xx.yy.zz
--
VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)COM
"Well my son, life is like a beanstalk, isn't it?"
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Posted by Bill M. on September 25, 2006, 9:20 pm
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>>
>>Actually, I thought Elmo's suggestion was the simpler one to
>>implement. Your initial question implies that you want to know your
>>public (WAN) IP address. You can get that from the router, as you
>>know, but doing so requires a login/password. You can also do it via
>>any of a handful of Internet web sites, and in that case no login is
>>required. It's your choice, but the "no login" option seems a bit
>>easier in case you've never scripted anything before. If you do have
>>that experience or are willing to learn a bit, then either way will
>>work equally well.
>
>I get mine via a simple snmp command:
>
>$ snmp_request 192.168.2.1 public getnext 1.3.6.1.2.1.4.20.1.1
>1.3.6.1.2.1.4.20.1.1.ww.xx.xx.zz = ww.xx.yy.zz
Many of us, (me anyway), don't run SNMP at home. I get enough of that
crap at work. :)
--
Bill
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Posted by on September 27, 2006, 6:55 am
If you were Registered and logged in, you could reply and use other advanced thread options >
>
>On Tue, 26 Sep 2006 01:00:53 GMT, VAXman- @SendSpamHere.ORG wrote:
>
>>>
>>>Actually, I thought Elmo's suggestion was the simpler one to
>>>implement. Your initial question implies that you want to know your
>>>public (WAN) IP address. You can get that from the router, as you
>>>know, but doing so requires a login/password. You can also do it via
>>>any of a handful of Internet web sites, and in that case no login is
>>>required. It's your choice, but the "no login" option seems a bit
>>>easier in case you've never scripted anything before. If you do have
>>>that experience or are willing to learn a bit, then either way will
>>>work equally well.
>>
>>I get mine via a simple snmp command:
>>
>>$ snmp_request 192.168.2.1 public getnext 1.3.6.1.2.1.4.20.1.1
>>1.3.6.1.2.1.4.20.1.1.ww.xx.xx.zz = ww.xx.yy.zz
>
>Many of us, (me anyway), don't run SNMP at home. I get enough of that
>crap at work. :)
The question was how to get the address. Whether or not you think SNMP
is crap is irrelevant. SNMP has been incorporated into most networking
equipment -- crap or otherwise -- and is a useful way to obtain statis-
tics and information from the device.
--
VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)COM
"Well my son, life is like a beanstalk, isn't it?"
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