I have 2811 router connected to the internet using ADSL connection;
i successfully configured the router to access the internet.
the image which router gas is c2800nm-ipbasek9-mz.124-4.
I need to configure the router to establish VPN tunnel.
which image should i installed .
Your HWIC-1ADSL is in the show diagnostics. According to this link it first support in 12.4(4)T http://www.cisco.com/en/US/products/ps5853/products_data_sheet0900aecd80394b7e.html
Use ADVANCED SECURITY 12.4(11)T with the filename c2800nm-advsecurityk9-mz.124-11.T1.bin (ED) instead