That's because that is not how you manually assign IP addresses. There is a file
ipp.txt that OpenVPN can maintain, so that clients (sometimes) get the same IP address reassigned to them if they reconnect or OpenVPN restarts.
See the sample config:
# Maintain a record of client <-> virtual IP address
# associations in this file. If OpenVPN goes down or
# is restarted, reconnecting clients can be assigned
# the same virtual IP address from the pool that was
# previously assigned.
But that's not what you've configured.
The files in the
ccd directory are interpreted as client-specific configuration. So creating a file
ccd/ipp.txt causes OpenVPN to attempt to interpret the file's contents as directives applying to a client named
This doesn't appear to be what you want.
Let's go back to the sample config:
# To assign specific IP addresses to specific
# clients or if a connecting client has a private
# subnet behind it that should also have VPN access,
# use the subdirectory "ccd" for client-specific
# configuration files (see man page for more info).
# EXAMPLE: Suppose you want to give
# Thelonious a fixed VPN IP address of 10.9.0.1.
# First uncomment out these lines:
;route 10.9.0.0 255.255.255.252
# Then add this line to ccd/Thelonious:
# ifconfig-push 10.9.0.1 10.9.0.2
So it looks like you want a file named
ifconfig-push 10.8.0.5 10.8.0.6.