VPN IPSec Issues with a single tunnel

[Pengin80]

Hi All,

I have been at this issue for weeks and for the life of me I cannot find the issue coressponding to the Logs.


Situation:

I got 4 Offices to connect to each other: A / B / C / D (apart from B to D this is not needed)

A <> B works
A <> C works
A <> D works
C <> D works

B <> C seems to work for a brief moments and then it breaks.

with these Logs.

Code Select Expand

not establishing CHILD_SA due to existing duplicate {6198} with SPIs c7ff3fe7_i c31373cd_o and TS
for some very funky reason, it created two Phases...


All tunnels are setup as per OPNSense Guide and each of them works except the B to C
OPNSense Guide

[Pengin80]

After long time of troublehsooting the same IPs that seem not to be able to see each other.. I figured there must be a dead space.
and after retyping the IPs caarefully it worked like a charm.

Sorry for the Topic!