[Openswan Users] Certain packets not traversing the VPN

[Mike A. Leonetti]

On a Linux<->Linux VPN all machines can talk to each other through ping,
SSH, RDP, and those protocols work.  But port 445 is showed as
"filtered" by nmap who also complains and says "Note: Host seems down.
If it is really up, but blocking our ping probes, try -PN".  What might
specifically be blocking  this port on machines on either side of the VPN?

On both iptables on the VPN all traffic from the source network is Accepted.

Essentially the SMB shares aren't working.