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Urgent Reply : Site to Site VPN , HeadOffice lan subnet behind NAT

Site to Site VPN between HeadOffice and Remote Site Office.

  • If configure IPSec Site to Site between HeadOffice Router and Remote Site Router how can Remote Site Local Vlan subnet can communicate with Head Office Local Vlan when HO Local VLan is behind a double natting (1 from router another from TMG server)

Can someone please share the configuration for the below topology confuse is it work or not .

Head office :

Local Lan (192.168.1.0/24)------->(LAN 192.168.1.1/24)TMG Server(WAN 10.1.1.1/24)---------->(LAN 10.1.1.2/24)ISR 1941(WAN 82.110.115.xx/30)-----ISP(82.110.115.xx/30).

Remote Office :

Local Lan (192.168.2.0/24)----------------->LAN(192.168.2.1/24) Router 1921 (WAN 85.xx.xx.xx/30)----------->ISP (85.xx.xx.xx/30)

Quich reply will be highly appriciated , urgently reply required.

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