VPN IPSEC and NAT

Question

Hi, I have a problem/doubt on how to do the correct configuration for this scenario: In site A with Cisco ASA there are client computers that need to reach the servers and other systems/equipment in site B with Sophos UTM. I have already created an IPSEC VPN between the 2 offices, everything OK, the networks on one side reach those of the other side. However, I have a network that has the same IP addressing on both, so it overlaps, how should I configure this one to make it pass through the tunnel? The network that must be reached on the Sophos side, among other things, contains the most important systems such as mail servers, domain controllers, etc.

This thread was automatically locked due to age.

Raphael Alganes · Accepted Answer

Hello papali , 
 Good day and thanks for reaching out to Sophos Community. 
 You may follow this KBA for the UTM side: https://support.sophos.com/support/s/article/KB-000034290?language=en_US 
 These steps need not only apply to tunnels between two UTMs; use the same configuration to set up VPN tunnels to other devices that use the same local network ranges as UTMs, as long as the device on the other end is configured in the same manner. 
 But please verify with the other end all the necessary configurations before applying. 
 Cheers,

VPN IPSEC and NAT

Top Replies