Re: Finding IP address of localhost via socket API (or other API)

[Timothy Grant]

On Tue, Aug 5, 2008 at 2:50 PM, David York <davideyork@gma il.comwrote:

Does anybody know how to find the real IP address (e.g.: address visible to
internet) of a machine via Python? In other words I have a machine with an
IP address something like 192.168.1.5, an address given to me by a router.
The router's address (and thus my machine's address) to the outside world is
something realistic, 123.156.123.156 or whatever. How do I get that
number? I've tried socket.getaddri nfo('localhost' , None) but all I get is
127.0.0.1 as expected.
>
How do I find out my machine's IP address as visible to the outside world?
Thanks a lot.
>
David

I'm not sure what you are trying to accomplish. The machine I'm typing
this on has a 192.168.x.x number. The router that gave it to me also
has a 192.168.x.x number. However, I know that that is not the IP that
the world sees when my packets finally leave the building.

What if your machine has multiple interface cards in it?

What are you trying to accomplish?


--
Stand Fast,
tjg. [Timothy Grant]

[Diez B. Roggisch]

Re: Finding IP address of localhost via socket API (or other API)

Timothy Grant schrieb:

On Tue, Aug 5, 2008 at 2:50 PM, David York <davideyork@gma il.comwrote:

>Does anybody know how to find the real IP address (e.g.: address visible to
>internet) of a machine via Python? In other words I have a machine with an
>IP address something like 192.168.1.5, an address given to me by a router.
>The router's address (and thus my machine's address) to the outside world is
>something realistic, 123.156.123.156 or whatever. How do I get that
>number? I've tried socket.getaddri nfo('localhost' , None) but all I get is
>127.0.0.1 as expected.

Try scraping a service like http://www.meineip.de/

Diez

[Steven D'Aprano]

Re: Finding IP address of localhost via socket API (or other API)

Sorry for replying to the replier (Timothy) instead of the OP (David),
but the original post seems to have been eaten by my ISP.

On Tue, 05 Aug 2008 15:48:26 -0700, Timothy Grant wrote:

On Tue, Aug 5, 2008 at 2:50 PM, David York <davideyork@gma il.comwrote:

>Does anybody know how to find the real IP address (e.g.: address
>visible to internet) of a machine via Python? In other words I have a
>machine with an IP address something like 192.168.1.5, an address given
>to me by a router. The router's address (and thus my machine's address)
>to the outside world is something realistic, 123.156.123.156 or
>whatever. How do I get that number? I've tried
>socket.getaddr info('localhost ', None) but all I get is 127.0.0.1 as
>expected.
>>
>How do I find out my machine's IP address as visible to the outside
>world? Thanks a lot.
>>
> David

>
I'm not sure what you are trying to accomplish. The machine I'm typing
this on has a 192.168.x.x number. The router that gave it to me also has
a 192.168.x.x number. However, I know that that is not the IP that the
world sees when my packets finally leave the building.

That's the IP address the OP probably wants. At least, when I've asked
this exact same question, that's what I meant.

The only way I know of is to query an external server that will tell you.
There's a few of them out there. Here's a few:

http://checkip.dyndns.org/

http://www.showmyip.com

http://www.showmyip.com/simple/

http://whatismyip.org/

The basic algorithm is to connect to one of those sites and fetch the
data it returns, then parse it appropriately. Some of them return a
simple IP address, some a complicated bunch of text, some a nicely
formatted XML document. Some of them only allow you to query the server a
limited number of times. I don't remember which is which.

To get you started, here's an untested piece of code:

import urllib2
import re
data = urllib2.urlopen (site).read()
matcher = re.compile(r"\d {1,3}\.\d{1,3}\ .\d{1,3}\.\d{1, 3}")
ip_address = matcher.search( data).group()



--
Steven

[Emile van Sebille]

Re: Finding IP address of localhost via socket API (or other API)

Steven D'Aprano wrote:

The only way I know of is to query an external server that will tell you.
There's a few of them out there. Here's a few:
>

http://checkip.dyndns.org/

http://www.showmyip.com

http://www.showmyip.com/simple/

http://whatismyip.org/

all four of these show my internal IP of 192.168.x.x in both ie and
firefox. Only http://www.meineip.de/ shows the external IP.

Emile

[John Machin]

Re: Finding IP address of localhost via socket API (or other API)

On Aug 6, 9:51 am, Emile van Sebille <em...@fenx.com wrote:

Steven D'Aprano wrote:

The only way I know of is to query an external server that will tell you.
There's a few of them out there. Here's a few:

>

http://checkip.dyndns.org/

http://www.showmyip.com

http://www.showmyip.com/simple/

http://whatismyip.org/

>
all four of these show my internal IP of 192.168.x.x in both ie and
firefox. Onlyhttp://www.meineip.de/shows the external IP.
>

All four of Steven's list showed my *external* address using Firefox,
as did http://www.meineip.de/

[Timothy Grant]

Re: Finding IP address of localhost via socket API (or other API)

On Tue, Aug 5, 2008 at 4:39 PM, Steven D'Aprano
<steve@remove-this-cybersource.com .auwrote:

Sorry for replying to the replier (Timothy) instead of the OP (David),
but the original post seems to have been eaten by my ISP.
>
On Tue, 05 Aug 2008 15:48:26 -0700, Timothy Grant wrote:
>

>On Tue, Aug 5, 2008 at 2:50 PM, David York <davideyork@gma il.comwrote:

>>Does anybody know how to find the real IP address (e.g.: address
>>visible to internet) of a machine via Python? In other words I have a
>>machine with an IP address something like 192.168.1.5, an address given
>>to me by a router. The router's address (and thus my machine's address)
>>to the outside world is something realistic, 123.156.123.156 or
>>whatever. How do I get that number? I've tried
>>socket.getadd rinfo('localhos t', None) but all I get is 127.0.0.1 as
>>expected.
>>>
>>How do I find out my machine's IP address as visible to the outside
>>world? Thanks a lot.
>>>
>> David

>>
>I'm not sure what you are trying to accomplish. The machine I'm typing
>this on has a 192.168.x.x number. The router that gave it to me also has
>a 192.168.x.x number. However, I know that that is not the IP that the
>world sees when my packets finally leave the building.

>
That's the IP address the OP probably wants. At least, when I've asked
this exact same question, that's what I meant.
>
The only way I know of is to query an external server that will tell you.
There's a few of them out there. Here's a few:
>

http://checkip.dyndns.org/

http://www.showmyip.com

http://www.showmyip.com/simple/

http://whatismyip.org/

>
The basic algorithm is to connect to one of those sites and fetch the
data it returns, then parse it appropriately. Some of them return a
simple IP address, some a complicated bunch of text, some a nicely
formatted XML document. Some of them only allow you to query the server a
limited number of times. I don't remember which is which.
>
To get you started, here's an untested piece of code:
>
import urllib2
import re
data = urllib2.urlopen (site).read()
matcher = re.compile(r"\d {1,3}\.\d{1,3}\ .\d{1,3}\.\d{1, 3}")
ip_address = matcher.search( data).group()
>
>
>
--
Steven

Now that is a cool solution to the problem. It even works in my work
environment where I have three routers between me and the front door.

--
Stand Fast,
tjg. [Timothy Grant]