rvs4000 behind adsl modem/router, port forwarding required?


I have a linksys rvs4000 behind a siemens 4200 adsl modem/router. I've been trying to establish a connection from home to the rvs4000 @ work. This used to work perfectly when i used cable modem, but seen i swap over to ADSL, it doesn't work anymore.

Do i need to configure the siemens 4200 adsl modem/router to forward any particular ports to the RVS4000 i have @ home?

Any help would be much appreciated.
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Michael WorshamStaff Infrastructure ArchitectCommented:
You trying to setup a VPN tunnel from your home to your work?

ausmedianetworkAuthor Commented:
yes that's what i am trying to do

@ work

cable modem -> RVS4000

@ Home

Siemens 4200 adsl router/modem -> RVS4000

When both site uses cable as internet connection, the VPN IPSEC worked fine.
Now it doesn't work anymore, i don't know why.
Michael WorshamStaff Infrastructure ArchitectCommented:
Is the Siemens 4200 setup in bridge mode to have the RVS4000 as the DHCP router?
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ausmedianetworkAuthor Commented:
nope, the siemens has a DHCP server in itself, it assign the IP to the rvs4000 WLAN port, then from there the RVS4000 assign the IPs to the pcs.

Do i need to do that?
Michael WorshamStaff Infrastructure ArchitectCommented:
Most likely, yes -- because the Siemens is most likely not routing any of the VPN GRE protocols to the remote site, thus your point of failure.

Siemens Speedstream 4200 in bridged mode

Network Layout: Internet <----> 4200 (Bridged) <----> (WAN port) RVS4000 <----> Intranet

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ausmedianetworkAuthor Commented:
I will definitely give this a go, sounds good.
I will get back with the answer.
ausmedianetworkAuthor Commented:
thanks, it worked.
Michael WorshamStaff Infrastructure ArchitectCommented:
Glad you got it up and running!

-- Michael
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