From: Alcides (alcides.hercules@gmail.com)
Date: Wed Jan 10 2007 - 05:48:03 EST
Hi List,
I'm presently working with a semi-government ISP as a security consultant.
The ISP has provided Internet access to the customers via phone lines,
it's DSL.
The customer is given q DSL router as a CPE. ISP people configure it
with 2 IP addresses; one local and one global, and implement NAT for
security. And the router is configured using both ie Global/Private IP
address in a browser.
I recently have been asked to find out loopholes in the mentioned system
where the customer's privacy is not taken care or can be compromised.
Now when I started my activities impersonating a normal customer, I
found that:
1]I can nmap and discover open ports on my and neighboring IP addresses.
2] This included HTTP, HTTPS, FTP, SMB, NB-SSN etc services listening
for incoming connections.
3]When I try to connect to some customer's HTTP port, I'm taken to
his/her DSL-router(CPE) config. page, Configuration password is asked
but is blank.
Now my questions:
1]What kind of tests can be carried out in order to find out what level
of access can other customers gain and
2]What degree of impact can it have as far as the privacy of the
customers is considered.
Your views can be a great help.
Thanking you,
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