The openconnect server expects to be configured using the uci interface.

To setup a server the provides access to LAN with network address
10.100.2.0/255.255.255.0 using the VPN address range
10.100.3.0/255.255.255.0 add the following to /etc/config/ocserv:

----/etc/config/ocserv-------------------------------------------
config ocserv 'config'
	option port '4443'
	option dpd '120'
	option max_clients '8'
	option max_same '2'
	option netmask '255.255.255.0'
	option ipaddr '10.100.3.0'
	option auth 'plain'
	option zone 'vpn'
	option default_domain 'lan'
	option compression '1'
	option enable '1'

config dns
	option ip '10.100.2.1'

config routes
	option ip '10.100.2.0'
	option netmask '255.255.255.0'

config ocservusers
	option name 'test'
	option password '$5$unl8uKAGNsdTh9zm$PnUHEGhDc5VHbFE2EfWwW38Bub6Y6EZ5hrFwZE1r2F1'

-----------------------------------------------------------------

This configuration also adds the user "test" with password "test". The
password is specified in the crypt(3) format.

The server can be enabled and started using:
# /etc/init.d/ocserv enable
# /etc/init.d/ocserv start


To simplify firewall configuration, you should setup an unmanaged interface
(e.g., called vpn), and will have assigned the 'vpns+' interfaces. Then a zone
called vpn should be setup to handle interactions with lan. An example
follows:
----/etc/config/network------------------------------------------
config interface 'vpn'
        option proto 'none'
        option ifname 'vpns+'
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----/etc/config/firewall-----------------------------------------
config zone
        option input 'ACCEPT'
        option forward 'REJECT'
        option output 'ACCEPT'
        option name 'vpn'
        option device 'vpns+'
        option network 'vpn'

config forwarding
        option dest 'lan'
        option src 'vpn'

config forwarding
        option dest 'vpn'
        option src 'lan'
-----------------------------------------------------------------


There is a luci plugin to allow configuring the server from
the web environment; see the package luci-app-ocserv.