yabancı bir forumda su sekilde demiş biri:
When PFSense distribute open vpn client addresses , It divide all range in /24 mask, in to groups with 4 ips with /30 mask . The first group is 192.168.1.4 – name of network ,192.168.1.5 gate only for this group, 192.168.1.6 assign to client, 192.168.1.7 broadcast for this group only.
The next group 192.168.1.8 – 192.168.1.11
the next one 192.168.1.12-192.168.1.15
Only addresses 6,10,14,18, ….. will be assigned to clients.
If you specify different from this addresses and different from theirs own gateway, it do not work.
So the right line in Advanced options should be:
ifconfig-push 192.168.1.6 192.168.1.5;
the next one:
ifconfig-push 192.168.1.10 192.168.1.9;
ifconfig-push 192.168.1.14 192.168.1.13;
and so on….
in this way it works perfectly.