At least in Nagpur 80% ADSL router happily respond to admin/admin.
It is very easy to find out. Just nmap -sS -p80 xxx.xxx.xxx.* where xxx.xxx.xxx is three octet of your gateway.
And point your browser to IP which has port 80 open.
The funny part is that you cannot close port 80 , 23 on dlink router.
Warm Regards,
Mukund Deshmukh, Director, Beta Computronics Pvt Ltd, 10/1 IT Park, Parsodi, Near VRCE Exchange, Nagpur -440022 Cell 9422113746
they don't touch the administrator password to their router AND they leave their router firewall off. So normal people, can access and play mischief with their routers >:-)
-- Dinesh A. Joshi