Not sure which subnet to use. Can't assign IP

gijs007

I've got a small Linux VPS which I want to setup as a VPN to benefit of better networking at a different datacenter, without the need to move our servers.
I've followed the tutorial on: https://help.ubuntu.com/14.04/serverguide/openvpn.html and I'm trying to connect to my openvpn server with Viscosity on windows server 2012 R2.

At first I was having some issues because I set the wrong subnet.

I checked the syslog file and found the following error
--server directive network/netmask combination is invalid

I fixed this by changing:

server 23.246.204.10 255.255.255.248

server 23.246.204.0 255.255.255.248

I was able to setup the vpn connection, but it assigned IP server 23.246.204.6 to my VPN and I only have access to IP's 23.246.204.10 to 23.246.204.15
I put it to: server 23.246.204.8 Then it said: --local addresses must be distinct from --ifconfig addresses

IP: 23.246.204.10 is set as listening IP.
How can I make my clients use IP 23.246.204.11 or another one up to 23.246.204.15?

gijs007

I didn't find an option to edit my post and since the forum rules say to include the config, I'll post it below:

local 23.246.204.10
port 1194
proto udp
dev tun
ca ca.crt
cert server.crt
key server.key  # This file should be kept secret
dh dh2048.pem
server 23.246.204.0 255.255.255.248
ifconfig-pool-persist ipp.txt
keepalive 10 120
persist-key
persist-tun
status openvpn-status.log
verb 3

gijs007

I've removed: local 23.246.204.10
and changed
server 23.246.204.0 255.255.255.248 to 23.246.204.8 255.255.255.248
This resolved the problem.