The things you must consider when connecting a two-wire DSL Home to a linksys router is it's DHCP capability, and it's NAT.
Since your Two-wire is obviously configured already, try checking if the Two-wire has a DHCP server enabled and what is its IP adress. If it does, you may just leave it the same or disable the feauture before deciding to conect it to the linksys router
Given:
Two-wire (DHCP enabled, NAT enabled(if there is), IP adress: 192.168.1.254)
BEFSX41 (DHCP enbaled, NAT enbaled, VPN capable, IP adress: 192.168.1.1)
Joe, is right that to make these two devices working, you must change the third octect of it's subnet to a different number to change the range so that they won't experience an IP adress conflict.
Thus:
1st Scenario:
CABLING: (LAN to WAN connection type)
the CAT5 from ethernet port of your two-wire should be connected to the WAN/Internet port of the BEFSX41. No need to disable the DHCP server. And no need to disable NAT on the BEFSX41 if there isn't any NAT on two-wire.
IP adressing:
Two-wire will now get IP adress: still same default 192.168.1.254 or 192.168.254.1
BEFSX41 will now get IP adress: 192.168.2.1 or still same default: 192.168.1.1
2nd Scenario:
CABLING: (LAN to LAN connection type)
The Cat5 from ethernet port of your two-wire should be connected to any ethernet of your BEFSX41. DHCP should be disabled. Just take note of it's IP adress.
IP adressing:
BEFSX41's IP adress should be within the same range of two-wire.
Two-wire has IP adress: 192.168.1.254
BEFSX41 IP adress must remain as it is: 192.168.1.1
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