rvs4000 behind adsl modem/router, port forwarding required?

Hi,

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.
ausmedianetworkAsked:
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Michael WorshamStaff Infrastructure ArchitectCommented:
You trying to setup a VPN tunnel from your home to your work?

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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.
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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?
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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
http://forums.whirlpool.net.au/forum-replies.cfm?t=330270#r3

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.
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ausmedianetworkAuthor Commented:
thanks, it worked.
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Michael WorshamStaff Infrastructure ArchitectCommented:
Glad you got it up and running!

-- Michael
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