Retrieving WAN IP address directly from a Linksys WRT64G Broadband Router

I was browsing groups earlier this week and noticed lots of folks
wanting to retrieve their broadband router's WAN IP address without
relying on an internet site.

Here's a VBScript that will do it from within Windows. It can be
easily tweaked for other broadband routers.

Enjoy!

Dr. C.
__________________________________________________ __________________
SCRIPT:
'================================================= ===========
' *Retrieve WAN IP* (c)2006 F.M. Covington, Lancanyon Labs
'================================================= ===========
'This script retrieves the WAN IP address directly from a Linksys
WRT64G broadband router.
'Replace default internal router IP address and password as necessary.
'================================================= ===========
Set xml = CreateObject("Microsoft.XMLHTTP")
xml.Open "GET", "http://192.168.1.100/StaRouter.htm", True,
"UserName","admin"
xml.Send
wscript.sleep 1500
x=15
IP = mid(xml.responsetext,instr(xml.responsetext,"var wan_ip = ")+14,x)
do while instr(IP,"""")
x=x-1
IP=mid(IP,1,x)
loop
wscript.echo "Current IP Address: "&vbcrlf& IP
'================================================= ============

"Mike" <(E-Mail Removed)> hath wroth:

>I was browsing groups earlier this week and noticed lots of folks
>wanting to retrieve their broadband router's WAN IP address without
>relying on an internet site.
>
>Here's a VBScript that will do it from within Windows. It can be
>easily tweaked for other broadband routers.

I think you mean WRT54G in the Subject: line.
Very nice VBS "scraper". Mind if I "borrow" it?

Here's how to do roughly the same thing with SNMP and WRT54G with
DD-WRT v23 SP2.

In the WRT54G, enable SNMP under
Administration -> Services -> SNMP
Save settings.

Fill in the fields. These are mine:
SNMP [x] Enable Disable
Location Fort Fungus
Contact (E-Mail Removed)
Name My home router
RO Community public
RW Community private <- change this !!!
The community names are actually passwords and should be kept secret.
Save settings.

Download and uncompress the Microsoft NETUTIL.EXE binary. This is an
all in one SNMP query program that originally came with Windoze NT
Resource kit. See:
http://www.wtcs.org/snmp4tpc/testing.htm
Copy NETUTIL.EXE to the c:\windows\system32\ directory.

Run:
snmputil walk 192.168.1.1 public .1.3.6.1.2.1.3.1.1.3.1.1

Variable = at.atTable.atEntry.atNetAddress.1.1.63.249.85.1
Value = IpAddress 63.249.85.1 <---- my router IP

Variable = at.atTable.atEntry.atNetAddress.1.1.192.168.1.11
Value = IpAddress 192.168.1.11 <---- my desktop IP

Variable = at.atTable.atEntry.atNetAddress.1.1.192.168.1.105
Value = IpAddress 192.168.1.105 <---- the neighbors via wi-fi

Variable = at.atTable.atEntry.atNetAddress.1.1.192.168.1.111
Value = IpAddress 192.168.1.111 <---- My PDA phone

(etc...)

End of MIB subtree.

This will show the router IP address and all the connected IP
addresses, on all ports.

For entertainment value, run:
snmputil walk 192.168.1.1 public .1.3
and you'll get all the various SNMP OID's (variables) that are
available. It's quite a long list.

SNMP v2 is somewhat of a security risk. The community names (i.e.
passwords) are sent unencrypted. The router is set by default to NOT
accept SNMP queries from the internet port, so this is only a problem
if you plan to run SNMP queries over the internet.

--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann <(E-Mail Removed)> hath wroth:

> snmputil walk 192.168.1.1 public .1.3.6.1.2.1.3.1.1.3.1.1
>
> Variable = at.atTable.atEntry.atNetAddress.1.1.63.249.85.1
> Value = IpAddress 63.249.85.1 <---- my router IP

Oops. That's my ISP's default gateway, not my router IP. The OID
shown is the one for the connected IP's, not the assigned IP's.

snmputil walk 192.168.1.1 public .1.3.6.1.2.1.4.20.1.1

Variable = ip.ipAddrTable.ipAddrEntry.ipAdEntAddr.63.249.85.1 27
Value = IpAddress 63.249.85.127 <--- My router WAN IP address

Variable = ip.ipAddrTable.ipAddrEntry.ipAdEntAddr.127.0.0.1
Value = IpAddress 127.0.0.1 <--- loopback adapter

Variable = ip.ipAddrTable.ipAddrEntry.ipAdEntAddr.192.168.1.1
Value = IpAddress 192.168.1.1 <--- LAN side IP address.

End of MIB subtree.



--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558