Establish VPN connection between remote offices

Please help, we have a main office and 2 remote offices, main office have VPN connection to remote office 1 and 2, but there are no direct VPN connections between remote office 1 and 2. How can I establish VPN connection between remote office 1 and 2? Any good reference to show me how to do this? Both offices use Cisco 1841 router. Thank you in advance.
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rochey2009Connect With a Mentor Commented:

One way of doing this is to use DMVPN.

You can also do this with crypto maps and an additional access list to define the source and destination subnets of the two remote sites.

Which way is you VPN configured at the moment?

QlemoBatchelor and DeveloperCommented:
You can look for "hairpinning" or "hub-and-spoke" configuration examples. The former phrase is more commonly used with Cisco devices.
It might be that 1841 does not support hairpinning, however, and it might depend on the IOS.
weikiiroAuthor Commented:
Hello rochey2009, we are using crypto maps right now, and I found a way to do this. Thank you for your help.
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