site to site vpn with modem in front of router

[abdul basit]

hi friends:

i have a dsl modem connected in front of my cisco router, modem do nating and dhcp. the fast ethernet port have a public ip as it is connected to switch port of the modem. i want to establish site to site vpn on cisco router. my question is will the modem affect the vpn or not ?

[Collin Clark]

The correct way of setting it up would be to put your modem in bridge mode and put your public IP on the ASA. Depending on the modem you may be able to NAT the public IP to the ASA, but your results may vary.

Hope it helps

[abdul basit]

thanks Collin

[abdul basit]

hi

but in my modem i have dsl and ethernet mode, no bridge mode.

[Collin Clark]

It's usually a bit 'hidden'. What's the make and model?

[abdul basit]

it was supplied by sp, the model is W150D and manfucturer is TENDA.