How To Find External IP From Behind A Router

[Archie]

If you are behind a router on your home network, and your ISP assigns you a dynamic IP, your machine would probably tell you your IP address is 192.168.1.88.

[user@localhost ~]$ ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:1A:80:1B:1D:27
          inet addr:192.168.1.88  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: ****::***:****:****:****/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5153411 errors:0 dropped:0 overruns:0 frame:0
          TX packets:22248630 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:4411355917 (4.1 GiB)  TX bytes:3225482953 (3.0 GiB)
          Interrupt:16
[user@localhost ~]

Well, that's not exactly right. Here's what you can do:

[user@localhost ~]$ wget -qO - http://cfaj.freeshell.org/ipaddr.cgi
125.***.***.39
[user@localhost ~]$

[YouCanToo]

If you are behind a router on your home network, and your ISP assigns you a dynamic IP, your machine would probably tell you your IP address is 192.168.1.88.

[user@localhost ~]$ ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:1A:80:1B:1D:27
          inet addr:192.168.1.88  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: ****::***:****:****:****/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5153411 errors:0 dropped:0 overruns:0 frame:0
          TX packets:22248630 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:4411355917 (4.1 GiB)  TX bytes:3225482953 (3.0 GiB)
          Interrupt:16
[user@localhost ~]

Well, that's not exactly right. Here's what you can do:

[user@localhost ~]$ wget -qO - http://cfaj.freeshell.org/ipaddr.cgi
125.***.***.39
[user@localhost ~]$

You could just go to http://whatismyip.com and it will actually show you your public ip

[Neal ManBear]

Good to know both ways.

[Archie]

You could just go to http://whatismyip.com and it will actually show you your public ip

A user's browser pointing to http://whatismyip.com is certainly one of the few ways of doing it. Just as a user can easily type in a simple command on the terminal would accomplish the same thing. Freedom and choices.

[AndrzejL]

I wrote this while back:

#!/bin/sh
external_ip=`curl http://www.whatismyip.com/faq/automation.asp`
echo "My IP address is: "$external_ip
echo "End!"

Regards.

Andy

[Neal ManBear]

......... Freedom and choices.

A big +1!

[Old-Polack]

I use:

----------------------------------------------------------------
#!/bin/bash
# Name: myip
# Author: O-P
# Purpose: Check current public IP address

curl -s checkip.dyndns.org|sed -e 's/.*Current IP Address: //' -e 's/<.*$//'

-----------------------------------------------------------------

This is in ~/bin so it's in my $PATH. I type myip at a prompt, press the Enter key, and the number is displayed.

[Was_Just19]

Some locations for checking IP addresses in addition to the command line methods

checkip.dnydns.org
www.showmyip.com
showip.net
www.displaymyip.com

[menotu]

Good to know both ways.

+1

[Jonesy]

I wrote this while back:

#!/bin/sh
external_ip=`curl http://www.whatismyip.com/automation/n09230945.asp`
echo "My IP address is: "$external_ip
echo "End!"

Regards.

Andy

That URL is now defunct, the script should now read:

Code: [Select]

#!/bin/sh
external_ip=`curl http://automation.whatismyip.com/n09230945.asp`
clear
echo "My IP address is: "$external_ip
echo "End!"

I added clear so as to remove the extraneous data and just print the required info.

Rgds  

[and then..]

My IP.sh

Code: [Select]

clear
echo "Your Public IP is:"
wget http://checkip.dyndns.org/ -q -O - | grep -Eo '\<[[:digit:]]{1,3}(\.[[:digit:]]{1,3}){3}\>'
 

[maxpolaris]

I love these little snippets for command line. I like to copy them into txt files so I can toy with them.

[cirrus_minor]

you can also visit my page at http://cirrusminor.info  and the lil danasoft widgit will show ur browser/OS/IP    .>PLUG<.

[DeBaas]

http://test-ipv6.com/

Is showing my ipv4 and ipv6 addresses on the net.